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【SpringMVC】实现增删改查(附源码)

引言

在上一篇文章中我们讲解了Spring MVC的注解、参数传递、返回值和页面跳转的关键步骤,

这篇文章，我来讲解一下利用前面所学知识，实现SpringMVC一个Maven项目的增删改查。

一、前期准备

1.1.搭建Maven环境

** 右击项目名➡new➡module**

     **选择maven项目➡选择jdk版本➡选择webapp **


 **    输入项目名 **

** 选择好maven项目的文件位置➡点击添加按钮➡配置好参数 **

1.2.导入pom.xml依赖

①将<properties>与<dependencies>标签内容进行替换即可。

<properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
        <maven.compiler.plugin.version>3.7.0</maven.compiler.plugin.version>

        <!--添加jar包依赖-->
        <!--1.spring 5.0.2.RELEASE相关-->
        <spring.version>5.0.2.RELEASE</spring.version>
        <!--2.mybatis相关-->
        <mybatis.version>3.4.5</mybatis.version>
        <!--mysql-->
        <mysql.version>5.1.44</mysql.version>
        <!--pagehelper分页jar依赖-->
        <pagehelper.version>5.1.2</pagehelper.version>
        <!--mybatis与spring集成jar依赖-->
        <mybatis.spring.version>1.3.1</mybatis.spring.version>
        <!--3.dbcp2连接池相关 druid-->
        <commons.dbcp2.version>2.1.1</commons.dbcp2.version>
        <commons.pool2.version>2.4.3</commons.pool2.version>
        <!--4.log日志相关-->
        <log4j2.version>2.9.1</log4j2.version>
        <log4j2.disruptor.version>3.2.0</log4j2.disruptor.version>
        <slf4j.version>1.7.13</slf4j.version>
        <!--5.其他-->
        <junit.version>4.12</junit.version>
        <servlet.version>4.0.0</servlet.version>
        <lombok.version>1.18.2</lombok.version>

        <mybatis.ehcache.version>1.1.0</mybatis.ehcache.version>
        <ehcache.version>2.10.0</ehcache.version>

        <redis.version>2.9.0</redis.version>
        <redis.spring.version>1.7.1.RELEASE</redis.spring.version>
        <jackson.version>2.9.3</jackson.version>
        <jstl.version>1.2</jstl.version>
        <standard.version>1.1.2</standard.version>
        <tomcat-jsp-api.version>8.0.47</tomcat-jsp-api.version>
        <commons-fileupload.version>1.3.3</commons-fileupload.version>
        <hibernate-validator.version>5.0.2.Final</hibernate-validator.version>

        <shiro.version>1.3.2</shiro.version>
    </properties>
//-------------------------------------------

    <dependencies>
        <!--1.spring相关-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-core</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-beans</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-orm</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-tx</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aspects</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-web</artifactId>
            <version>${spring.version}</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <version>${spring.version}</version>
        </dependency>

        <!--2.mybatis相关-->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>${mybatis.version}</version>
        </dependency>
        <!--mysql-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>${mysql.version}</version>
        </dependency>
        <!--pagehelper分页插件jar包依赖-->
        <dependency>
            <groupId>com.github.pagehelper</groupId>
            <artifactId>pagehelper</artifactId>
            <version>${pagehelper.version}</version>
        </dependency>
        <!--mybatis与spring集成jar包依赖-->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>${mybatis.spring.version}</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context-support</artifactId>
            <version>${spring.version}</version>
        </dependency>

        <!--mybatis与ehcache整合-->
        <dependency>
            <groupId>org.mybatis.caches</groupId>
            <artifactId>mybatis-ehcache</artifactId>
            <version>${mybatis.ehcache.version}</version>
        </dependency>
        <!--ehcache依赖-->
        <dependency>
            <groupId>net.sf.ehcache</groupId>
            <artifactId>ehcache</artifactId>
            <version>${ehcache.version}</version>
        </dependency>

        <dependency>
            <groupId>redis.clients</groupId>
            <artifactId>jedis</artifactId>
            <version>${redis.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.data</groupId>
            <artifactId>spring-data-redis</artifactId>
            <version>${redis.spring.version}</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
            <version>${jackson.version}</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-core</artifactId>
            <version>${jackson.version}</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-annotations</artifactId>
            <version>${jackson.version}</version>
        </dependency>

        <!--3.dbcp2连接池相关-->
        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-dbcp2</artifactId>
            <version>${commons.dbcp2.version}</version>
            <exclusions>
                <exclusion>
                    <artifactId>commons-pool2</artifactId>
                    <groupId>org.apache.commons</groupId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-pool2</artifactId>
            <version>${commons.pool2.version}</version>
        </dependency>

        <!--springmvc依赖-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>${spring.version}</version>
        </dependency>

        <!--4.log日志相关依赖-->

        <!-- log4j2日志相关依赖 -->
        <!-- log配置：Log4j2 + Slf4j -->
        <!-- slf4j核心包-->
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <version>${slf4j.version}</version>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>jcl-over-slf4j</artifactId>
            <version>${slf4j.version}</version>
            <scope>runtime</scope>
        </dependency>

        <!--核心log4j2jar包-->
        <dependency>
            <groupId>org.apache.logging.log4j</groupId>
            <artifactId>log4j-api</artifactId>
            <version>${log4j2.version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.logging.log4j</groupId>
            <artifactId>log4j-core</artifactId>
            <version>${log4j2.version}</version>
        </dependency>
        <!--用于与slf4j保持桥接-->
        <dependency>
            <groupId>org.apache.logging.log4j</groupId>
            <artifactId>log4j-slf4j-impl</artifactId>
            <version>${log4j2.version}</version>
        </dependency>
        <!--web工程需要包含log4j-web，非web工程不需要-->
        <dependency>
            <groupId>org.apache.logging.log4j</groupId>
            <artifactId>log4j-web</artifactId>
            <version>${log4j2.version}</version>
            <scope>runtime</scope>
        </dependency>

        <!--需要使用log4j2的AsyncLogger需要包含disruptor-->
        <dependency>
            <groupId>com.lmax</groupId>
            <artifactId>disruptor</artifactId>
            <version>${log4j2.disruptor.version}</version>
        </dependency>

        <!--5.其他-->
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>${junit.version}</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>${servlet.version}</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>${lombok.version}</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>jstl</groupId>
            <artifactId>jstl</artifactId>
            <version>${jstl.version}</version>
        </dependency>
        <dependency>
            <groupId>taglibs</groupId>
            <artifactId>standard</artifactId>
            <version>${standard.version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.tomcat</groupId>
            <artifactId>tomcat-jsp-api</artifactId>
            <version>${tomcat-jsp-api.version}</version>
        </dependency>
        <dependency>
            <groupId>commons-fileupload</groupId>
            <artifactId>commons-fileupload</artifactId>
            <version>${commons-fileupload.version}</version>
        </dependency>

        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-validator</artifactId>
            <version>${hibernate-validator.version}</version>
        </dependency>

        <!--shiro依赖-->
        <dependency>
            <groupId>org.apache.shiro</groupId>
            <artifactId>shiro-core</artifactId>
            <version>${shiro.version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.shiro</groupId>
            <artifactId>shiro-web</artifactId>
            <version>${shiro.version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.shiro</groupId>
            <artifactId>shiro-spring</artifactId>
            <version>${shiro.version}</version>
        </dependency>
    </dependencies>

②<build>标签内将<pluginManagement>标签删除（解除版本锁定），加入<resources>。

可以确保mybatis-generator-maven-plugin在运行时能够正确地将所需的文件复制到目标文件夹中，避免出现缺少文件或配置错误的问题。

<build>
        <finalName>xwzyssm</finalName>
        <resources>
            <!--解决mybatis-generator-maven-plugin运行时没有将XxxMapper.xml文件放入target文件夹的问题-->
            <resource>
                <directory>src/main/java</directory>
                <includes>
                    <include>**/*.xml</include>
                </includes>
            </resource>
            <!--解决mybatis-generator-maven-plugin运行时没有将jdbc.properites文件放入target文件夹的问题-->
            <resource>
                <directory>src/main/resources</directory>
                <includes>
                    <include>*.properties</include>
                    <include>*.xml</include>
                </includes>
            </resource>
        </resources>
        <pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
            <plugins>
                <plugin>
                    <groupId>org.apache.maven.plugins</groupId>
                    <artifactId>maven-compiler-plugin</artifactId>
                    <version>${maven.compiler.plugin.version}</version>
                    <configuration>
                        <source>${maven.compiler.source}</source>
                        <target>${maven.compiler.target}</target>
                        <encoding>${project.build.sourceEncoding}</encoding>
                    </configuration>
                </plugin>
                <plugin>
                    <groupId>org.mybatis.generator</groupId>
                    <artifactId>mybatis-generator-maven-plugin</artifactId>
                    <version>1.3.2</version>
                    <dependencies>
                        <!--使用Mybatis-generator插件不能使用太高版本的mysql驱动 -->
                        <dependency>
                            <groupId>mysql</groupId>
                            <artifactId>mysql-connector-java</artifactId>
                            <version>${mysql.version}</version>
                        </dependency>
                    </dependencies>
                    <configuration>
                        <overwrite>true</overwrite>
                    </configuration>
                </plugin>

                <plugin>
                    <artifactId>maven-clean-plugin</artifactId>
                    <version>3.1.0</version>
                </plugin>
                <!-- see http://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_war_packaging -->
                <plugin>
                    <artifactId>maven-resources-plugin</artifactId>
                    <version>3.0.2</version>
                </plugin>
                <plugin>
                    <artifactId>maven-compiler-plugin</artifactId>
                    <version>3.8.0</version>
                </plugin>
                <plugin>
                    <artifactId>maven-surefire-plugin</artifactId>
                    <version>2.22.1</version>
                </plugin>
                <plugin>
                    <artifactId>maven-war-plugin</artifactId>
                    <version>3.2.2</version>
                </plugin>
                <plugin>
                    <artifactId>maven-install-plugin</artifactId>
                    <version>2.5.2</version>
                </plugin>
                <plugin>
                    <artifactId>maven-deploy-plugin</artifactId>
                    <version>2.8.2</version>
                </plugin>
            </plugins>
        </pluginManagement>
    </build>

③在pom.xml中，将junit的scope（依赖作用的范围）注释方便我们使用。

1.3.导入配置文件

导入羡慕之前先将Maven的目录结构补齐

①jdbc.properties

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://47.100.191.44:3308/mybatis_ssm?useUnicode=true&characterEncoding=UTF-8
jdbc.username=123
jdbc.password=123

②generatorConfig.xml

将逆向生成的代码所在的包名进行更改即可。

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE generatorConfiguration PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN"
        "http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd" >
<generatorConfiguration>
    <!-- 引入配置文件 -->
    <properties resource="jdbc.properties"/>

    <!--指定数据库jdbc驱动jar包的位置-->
    <classPathEntry location="E:\\apache-maven-3.5.0-bin\\mvn_Repository\\mysql\\mysql-connector-java\\5.1.44"/>

    <!-- 一个数据库一个context -->
    <context id="infoGuardian">
        <!-- 注释 -->
        <commentGenerator>
            <property name="suppressAllComments" value="true"/><!-- 是否取消注释 -->
            <property name="suppressDate" value="true"/> <!-- 是否生成注释代时间戳 -->
        </commentGenerator>

        <!-- jdbc连接 -->
        <jdbcConnection driverClass="${jdbc.driver}"
                        connectionURL="${jdbc.url}" userId="${jdbc.username}" password="${jdbc.password}"/>

        <!-- 类型转换 -->
        <javaTypeResolver>
            <!-- 是否使用bigDecimal， false可自动转化以下类型（Long, Integer, Short, etc.） -->
            <property name="forceBigDecimals" value="false"/>
        </javaTypeResolver>

        <!-- 01 指定javaBean生成的位置 -->
        <!-- targetPackage：指定生成的model生成所在的包名 -->
        <!-- targetProject：指定在该项目下所在的路径  -->
        <javaModelGenerator targetPackage="com.csdn.xw.model"
                            targetProject="src/main/java">
            <!-- 是否允许子包，即targetPackage.schemaName.tableName -->
            <property name="enableSubPackages" value="false"/>
            <!-- 是否对model添加构造函数 -->
            <property name="constructorBased" value="true"/>
            <!-- 是否针对string类型的字段在set的时候进行trim调用 -->
            <property name="trimStrings" value="false"/>
            <!-- 建立的Model对象是否 不可改变  即生成的Model对象不会有 setter方法，只有构造方法 -->
            <property name="immutable" value="false"/>
        </javaModelGenerator>

        <!-- 02 指定sql映射文件生成的位置 -->
        <sqlMapGenerator targetPackage="com.csdn.xw.mapper"
                         targetProject="src/main/java">
            <!-- 是否允许子包，即targetPackage.schemaName.tableName -->
            <property name="enableSubPackages" value="false"/>
        </sqlMapGenerator>

        <!-- 03 生成XxxMapper接口 -->
        <!-- type="ANNOTATEDMAPPER",生成Java Model 和基于注解的Mapper对象 -->
        <!-- type="MIXEDMAPPER",生成基于注解的Java Model 和相应的Mapper对象 -->
        <!-- type="XMLMAPPER",生成SQLMap XML文件和独立的Mapper接口 -->
        <javaClientGenerator targetPackage="com.csdn.xw.mapper"
                             targetProject="src/main/java" type="XMLMAPPER">
            <!-- 是否在当前路径下新加一层schema,false路径com.oop.eksp.user.model， true:com.oop.eksp.user.model.[schemaName] -->
            <property name="enableSubPackages" value="false"/>
        </javaClientGenerator>

        <!-- 配置表信息 -->
        <!-- schema即为数据库名 -->
        <!-- tableName为对应的数据库表 -->
        <!-- domainObjectName是要生成的实体类 -->
        <!-- enable*ByExample是否生成 example类 -->
        <!--<table schema="" tableName="t_book" domainObjectName="Book"-->
        <!--enableCountByExample="false" enableDeleteByExample="false"-->
        <!--enableSelectByExample="false" enableUpdateByExample="false">-->
        <!--&lt;!&ndash; 忽略列，不生成bean 字段 &ndash;&gt;-->
        <!--&lt;!&ndash; <ignoreColumn column="FRED" /> &ndash;&gt;-->
        <!--&lt;!&ndash; 指定列的java数据类型 &ndash;&gt;-->
        <!--&lt;!&ndash; <columnOverride column="LONG_VARCHAR_FIELD" jdbcType="VARCHAR" /> &ndash;&gt;-->
        <!--</table>-->

        <table schema="" tableName="t_mysql_student" domainObjectName="Student"
               enableCountByExample="false" enableDeleteByExample="false"
               enableSelectByExample="false" enableUpdateByExample="false">
        </table>

    </context>
</generatorConfiguration>

③log4j2.xml

<?xml version="1.0" encoding="UTF-8"?>

<!-- status : 指定log4j本身的打印日志的级别.ALL< Trace < DEBUG < INFO < WARN < ERROR
    < FATAL < OFF。 monitorInterval : 用于指定log4j自动重新配置的监测间隔时间，单位是s,最小是5s. -->
<Configuration status="WARN" monitorInterval="30">
    <Properties>
        <!-- 配置日志文件输出目录 ${sys:user.home} -->
        <Property name="LOG_HOME">/root/workspace/lucenedemo/logs</Property>
        <property name="ERROR_LOG_FILE_NAME">/root/workspace/lucenedemo/logs/error</property>
        <property name="WARN_LOG_FILE_NAME">/root/workspace/lucenedemo/logs/warn</property>
        <property name="PATTERN">%d{yyyy-MM-dd HH:mm:ss.SSS} [%t-%L] %-5level %logger{36} - %msg%n</property>
    </Properties>

    <Appenders>
        <!--这个输出控制台的配置 -->
        <Console name="Console" target="SYSTEM_OUT">
            <!-- 控制台只输出level及以上级别的信息(onMatch),其他的直接拒绝(onMismatch) -->
            <ThresholdFilter level="trace" onMatch="ACCEPT"
                             onMismatch="DENY" />
            <!-- 输出日志的格式 -->
            <!-- %d{yyyy-MM-dd HH:mm:ss, SSS} : 日志生产时间 %p : 日志输出格式 %c : logger的名称
                %m : 日志内容，即 logger.info("message") %n : 换行符 %C : Java类名 %L : 日志输出所在行数 %M
                : 日志输出所在方法名 hostName : 本地机器名 hostAddress : 本地ip地址 -->
            <PatternLayout pattern="${PATTERN}" />
        </Console>

        <!--文件会打印出所有信息，这个log每次运行程序会自动清空，由append属性决定，这个也挺有用的，适合临时测试用 -->
        <!--append为TRUE表示消息增加到指定文件中，false表示消息覆盖指定的文件内容，默认值是true -->
        <File name="log" fileName="logs/test.log" append="false">
            <PatternLayout
                    pattern="%d{yyyy-MM-dd HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n" />
        </File>
        <!-- 这个会打印出所有的info及以下级别的信息，每次大小超过size， 则这size大小的日志会自动存入按年份-月份建立的文件夹下面并进行压缩，作为存档 -->
        <RollingFile name="RollingFileInfo" fileName="${LOG_HOME}/info.log"
                     filePattern="${LOG_HOME}/$${date:yyyy-MM}/info-%d{yyyy-MM-dd}-%i.log">
            <!--控制台只输出level及以上级别的信息（onMatch），其他的直接拒绝（onMismatch） -->
            <ThresholdFilter level="info" onMatch="ACCEPT"
                             onMismatch="DENY" />
            <PatternLayout
                    pattern="%d{yyyy-MM-dd HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n" />
            <Policies>
                <!-- 基于时间的滚动策略，interval属性用来指定多久滚动一次，默认是1 hour。 modulate=true用来调整时间：比如现在是早上3am，interval是4，那么第一次滚动是在4am，接着是8am，12am...而不是7am. -->
                <!-- 关键点在于 filePattern后的日期格式，以及TimeBasedTriggeringPolicy的interval， 日期格式精确到哪一位，interval也精确到哪一个单位 -->
                <!-- log4j2的按天分日志文件 : info-%d{yyyy-MM-dd}-%i.log -->
                <TimeBasedTriggeringPolicy interval="1"
                                           modulate="true" />
                <!-- SizeBasedTriggeringPolicy:Policies子节点， 基于指定文件大小的滚动策略，size属性用来定义每个日志文件的大小. -->
                <!-- <SizeBasedTriggeringPolicy size="2 kB" /> -->
            </Policies>
        </RollingFile>

        <RollingFile name="RollingFileWarn" fileName="${WARN_LOG_FILE_NAME}/warn.log"
                     filePattern="${WARN_LOG_FILE_NAME}/$${date:yyyy-MM}/warn-%d{yyyy-MM-dd}-%i.log">
            <ThresholdFilter level="warn" onMatch="ACCEPT"
                             onMismatch="DENY" />
            <PatternLayout
                    pattern="%d{yyyy-MM-dd HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n" />
            <Policies>
                <TimeBasedTriggeringPolicy />
                <SizeBasedTriggeringPolicy size="2 kB" />
            </Policies>
            <!-- DefaultRolloverStrategy属性如不设置，则默认为最多同一文件夹下7个文件，这里设置了20 -->
            <DefaultRolloverStrategy max="20" />
        </RollingFile>

        <RollingFile name="RollingFileError" fileName="${ERROR_LOG_FILE_NAME}/error.log"
                     filePattern="${ERROR_LOG_FILE_NAME}/$${date:yyyy-MM}/error-%d{yyyy-MM-dd-HH-mm}-%i.log">
            <ThresholdFilter level="error" onMatch="ACCEPT"
                             onMismatch="DENY" />
            <PatternLayout
                    pattern="%d{yyyy-MM-dd HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n" />
            <Policies>
                <!-- log4j2的按分钟 分日志文件 : warn-%d{yyyy-MM-dd-HH-mm}-%i.log -->
                <TimeBasedTriggeringPolicy interval="1"
                                           modulate="true" />
                <!-- <SizeBasedTriggeringPolicy size="10 MB" /> -->
            </Policies>
        </RollingFile>

    </Appenders>

    <!--然后定义logger，只有定义了logger并引入的appender，appender才会生效 -->
    <Loggers>
        <!--过滤掉spring和mybatis的一些无用的DEBUG信息 -->
        <logger name="org.springframework" level="INFO"></logger>
        <logger name="org.mybatis" level="INFO"></logger>

        <!-- 第三方日志系统 -->
        <logger name="org.springframework" level="ERROR" />
        <logger name="org.hibernate" level="ERROR" />
        <logger name="org.apache.struts2" level="ERROR" />
        <logger name="com.opensymphony.xwork2" level="ERROR" />
        <logger name="org.jboss" level="ERROR" />

        <!-- 配置日志的根节点 -->
        <root level="all">
            <appender-ref ref="Console" />
            <appender-ref ref="RollingFileInfo" />
            <appender-ref ref="RollingFileWarn" />
            <appender-ref ref="RollingFileError" />
        </root>

    </Loggers>

</Configuration>

④spring-mybatis.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd">
    <!--1. 注解式开发 -->

    <!-- 注解驱动 -->
    <context:annotation-config/>
    <!-- 用注解方式注入bean，并指定查找范围：com.javaxl.ssm及子子孙孙包-->
    <context:component-scan base-package="com.csdn.xw"/>

    <context:property-placeholder location="classpath:jdbc.properties"/>

    <bean id="dataSource" class="org.apache.commons.dbcp2.BasicDataSource"
          destroy-method="close">
        <property name="driverClassName" value="${jdbc.driver}"/>
        <property name="url" value="${jdbc.url}"/>
        <property name="username" value="${jdbc.username}"/>
        <property name="password" value="${jdbc.password}"/>
        <!--初始连接数-->
        <property name="initialSize" value="10"/>
        <!--最大活动连接数-->
        <property name="maxTotal" value="100"/>
        <!--最大空闲连接数-->
        <property name="maxIdle" value="50"/>
        <!--最小空闲连接数-->
        <property name="minIdle" value="10"/>
        <!--设置为-1时，如果没有可用连接，连接池会一直无限期等待，直到获取到连接为止。-->
        <!--如果设置为N（毫秒），则连接池会等待N毫秒，等待不到，则抛出异常-->
        <property name="maxWaitMillis" value="-1"/>
    </bean>

    <!--4. spring和MyBatis整合 -->
    <!--1) 创建sqlSessionFactory-->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <!-- 指定数据源 -->
        <property name="dataSource" ref="dataSource"/>
        <!-- 自动扫描XxxMapping.xml文件，**任意路径 -->
        <property name="mapperLocations" value="classpath*:com/csdn/xw/**/mapper/*.xml"/>
        <!-- 指定别名 -->
        <property name="typeAliasesPackage" value="com/csdn/xw/**/model"/>
        <!--配置pagehelper插件-->
        <property name="plugins">
            <array>
                <bean class="com.github.pagehelper.PageInterceptor">
                    <property name="properties">
                        <value>
                            helperDialect=mysql
                        </value>
                    </property>
                </bean>
            </array>
        </property>
    </bean>

    <!--2) 自动扫描com/javaxl/ssm/**/mapper下的所有XxxMapper接口(其实就是DAO接口)，并实现这些接口，-->
    <!--   即可直接在程序中使用dao接口，不用再获取sqlsession对象-->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <!--basePackage 属性是映射器接口文件的包路径。-->
        <!--你可以使用分号或逗号 作为分隔符设置多于一个的包路径-->
        <property name="basePackage" value="com/csdn/xw/**/mapper"/>
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
    </bean>

    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource" />
    </bean>
    <tx:annotation-driven transaction-manager="transactionManager" />
    <aop:aspectj-autoproxy/>
</beans>

⑤spring-context.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">

    <!--Spring框架与mybatis整合的配置文件加载spring上下文-->
    <import resource="classpath:spring-mybatis.xml"></import>

    
</beans>

⑥spring-mvc.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
      http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd">
    <!--1) 扫描com.zking.zf及子子孙孙包下的控制器(扫描范围过大，耗时)-->
    <context:component-scan base-package="com.csdn.xw"/>

    <!--2) 此标签默认注册DefaultAnnotationHandlerMapping和AnnotationMethodHandlerAdapter -->
    <mvc:annotation-driven />

    <!--3) 创建ViewResolver视图解析器 -->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <!-- viewClass需要在pom中引入两个包：standard.jar and jstl.jar -->
        <property name="viewClass"
                  value="org.springframework.web.servlet.view.JstlView"></property>
        <property name="prefix" value="/WEB-INF/jsp/"/>
        <property name="suffix" value=".jsp"/>
    </bean>

    <!--4) 单独处理图片、样式、js等资源 -->
    <!-- <mvc:resources location="/css/" mapping="/css/**"/>
     <mvc:resources location="/js/" mapping="/js/**"/>
     <mvc:resources location="WEB-INF/images/" mapping="/images/**"/>-->

<!--    <mvc:resources location="/static/" mapping="/static/**"/>-->

    <aop:aspectj-autoproxy/>
</beans>

⑦修改web.xml文件

该配置文件的作用是创建一个基于Spring MVC框架的Web应用程序，并配置了相关的上下文、监听器和Servlet，以支持Spring的依赖注入和MVC模式的开发。

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
         version="3.1">
  <display-name>Archetype Created Web Application</display-name>
  <!-- Spring和web项目集成start -->
  <!-- spring上下文配置文件 -->
  <context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>classpath:spring-context.xml</param-value>
  </context-param>
  <!-- 读取Spring上下文的监听器 -->
  <listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>
  <!-- Spring和web项目集成end -->

  <!-- 中文乱码处理 -->
  <filter>
    <filter-name>encodingFilter</filter-name>
    <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
    <async-supported>true</async-supported>
    <init-param>
      <param-name>encoding</param-name>
      <param-value>UTF-8</param-value>
    </init-param>
  </filter>
  <filter-mapping>
    <filter-name>encodingFilter</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>

  <!-- Spring MVC servlet -->
  <servlet>
    <servlet-name>SpringMVC</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <!--此参数可以不配置，默认值为：/WEB-INF/springmvc-servlet.xml-->
    <init-param>
      <param-name>contextConfigLocation</param-name>
      <param-value>classpath:spring-mvc.xml</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
    <!--web.xml 3.0的新特性，是否支持异步-->
    <async-supported>true</async-supported>
  </servlet>
  <servlet-mapping>
    <servlet-name>SpringMVC</servlet-name>
    <url-pattern>/</url-pattern>
  </servlet-mapping>
</web-app>

二、逆向生成增删改查

2.1.导入相关util类

①StringUtils.java

package com.csdn.xw.util;

public class StringUtils {
    // 私有的构造方法，保护此类不能在外部实例化
    private StringUtils() {
    }

    /**
     * 如果字符串等于null或去空格后等于""，则返回true，否则返回false
     * 
     * @param s
     * @return
     */
    public static boolean isBlank(String s) {
        boolean b = false;
        if (null == s || s.trim().equals("")) {
            b = true;
        }
        return b;
    }
    
    /**
     * 如果字符串不等于null或去空格后不等于""，则返回true，否则返回false
     * 
     * @param s
     * @return
     */
    public static boolean isNotBlank(String s) {
        return !isBlank(s);
    }

}

②PageBean.java

package com.csdn.xw.util;

import javax.servlet.http.HttpServletRequest;
import java.util.HashMap;
import java.util.Map;

/**
 * @author Java方文山
 * @compay csdn_Java方文山
 * @create 2023-09-07-16:28
 */
public class PageBean {

    private int page = 1;// 页码

    private int rows = 10;// 页大小

    private int total = 0;// 总记录数

    private boolean pagination = true;// 是否分页

    private String url; //保存上一次请求的URL

    private Map<String,String[]> paramMap = new HashMap<>();// 保存上一次请求的参数

    /**
     * 初始化pagebean的，保存上一次请求的重要参数
     * @param req
     */
    public void setRequest(HttpServletRequest req) {
//        1.1    需要保存上一次请求的URL
        this.setUrl(req.getRequestURL().toString());
//        1.2    需要保存上一次请求的参数    bname、price
        this.setParamMap(req.getParameterMap());
//        1.3    需要保存上一次请求的分页设置    pagination
        this.setPagination(req.getParameter("pagination"));
//        1.4    需要保存上一次请求的展示条目数
        this.setRows(req.getParameter("rows"));
//        1.5  初始化请求的页码    page
        this.setPage(req.getParameter("page"));
    }

    public void setPage(String page) {
        if(StringUtils.isNotBlank(page))
            this.setPage(Integer.valueOf(page));
    }

    public void setRows(String rows) {
        if(StringUtils.isNotBlank(rows))
            this.setRows(Integer.valueOf(rows));
    }

    public void setPagination(String pagination) {
//        只有在前台jsp填写了pagination=false，才代表不分页
        if(StringUtils.isNotBlank(pagination))
            this.setPagination(!"false".equals(pagination));
    }

    public String getUrl() {
        return url;
    }

    public void setUrl(String url) {
        this.url = url;
    }

    public Map<String, String[]> getParamMap() {
        return paramMap;
    }

    public void setParamMap(Map<String, String[]> paramMap) {
        this.paramMap = paramMap;
    }

    public PageBean() {
        super();
    }

    public int getPage() {
        return page;
    }

    public void setPage(int page) {
        this.page = page;
    }

    public int getRows() {
        return rows;
    }

    public void setRows(int rows) {
        this.rows = rows;
    }

    public int getTotal() {
        return total;
    }

    public void setTotal(int total) {
        this.total = total;
    }

    public void setTotal(String total) {
        this.total = Integer.parseInt(total);
    }

    public boolean isPagination() {
        return pagination;
    }

    public void setPagination(boolean pagination) {
        this.pagination = pagination;
    }

    /**
     * 获得起始记录的下标
     *
     * @return
     */
    public int getStartIndex() {
        return (this.page - 1) * this.rows;
    }

    /**
     * 最大页
     * @return
     */
    public int maxPage() {
//        total % rows == 0 ? total / rows : total / rows +1
        return this.total % this.rows == 0 ? this.total / this.rows : this.total / this.rows + 1;
    }

    /**
     * 下一页
     * @return
     */
    public int nextPage() {
//        如果当前页小于最大页，那就下一页为当前页+1；如果不小于，说明当前页就是最大页，那就无需+1
        return this.page < this.maxPage() ? this.page + 1 : this.page;
    }

    /**
     * 上一页
     * @return
     */
    public int previousPage() {
        return this.page > 1 ? this.page - 1 : this.page;
    }

    @Override
    public String toString() {
        return "PageBean [page=" + page + ", rows=" + rows + ", total=" + total + ", pagination=" + pagination + "]";
    }

}

2.2.aspect切面层

创建一个名为aspect的包，编写一个PageAspect切面类专门来做分页。

PageAspect

package com.csdn.xw.aspect;

import com.csdn.xw.util.PageBean;
import com.github.pagehelper.PageHelper;
import com.github.pagehelper.PageInfo;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.springframework.stereotype.Component;

import java.util.List;

@Aspect
//代表当前类是切面类
@Component
//代表这个是交给Spring管理
public class PageAspect {

    /**
     * *：返回值
     * *..：无限包
     * *Biz：以Biz结尾的接口名
     * .pager：以pager方法
     * 只要同时匹配上诉四个条件，就会被列为目标对象
     * 上诉配置要生效，代理注释一定要打开：<aop:aspectj-autoproxy/>
     * @param args
     * @return
     * @throws Throwable
     */
    @Around("execution(* *..*Biz.*Pager(..))")
    public Object invoke(ProceedingJoinPoint args) throws Throwable {
        Object[] params = args.getArgs();
        PageBean pageBean = null;
        for (Object param : params) {
            if(param instanceof PageBean){
                pageBean = (PageBean)param;
                break;
            }
        }

        if(pageBean != null && pageBean.isPagination())
            PageHelper.startPage(pageBean.getPage(),pageBean.getRows());

        Object list = args.proceed(params);

        if(null != pageBean && pageBean.isPagination()){
            PageInfo pageInfo = new PageInfo((List) list);
            pageBean.setTotal(pageInfo.getTotal()+"");
        }
        return list;
    }

}

** @Around("execution(* *..Biz.Pager(..))")：这是一个注解，表示这个切面将会拦截所有使用了Biz.Pager()方法的方法，所以我们需要分页的代码在其方法后面，加上Pager并在Biz多传递一个PageBean参数即可。

2.3.Mybatis generator逆向生成

在pom.xml或者generatorConfig.xml处

右击➡Run Maven➡Plugins➡Mybatis-generator-maven-plugin➡单击mybatis-generator:generate

会在根据你配置文件中提供的路径进行逆向生成代码。

2.4.根据生成代码编写Biz层与实现类

由于我们还需要一个模糊查询的方法，所以在StudentMapper.xml中添加一个方法

<select id="selectBySnamePager" resultType="com.csdn.xw.model.Student" parameterType="com.csdn.xw.model.Student" >
    select
    <include refid="Base_Column_List" />
    from t_mysql_student
    <if test="sname != null">
      where  sname like concat('%',#{sname},'%')
    </if>
  </select>

并在StudentMapper.java添加一个相对应的方法和注解@Repository

StudentBiz

public interface StudentBiz {
    int deleteByPrimaryKey(String sid);

    int insert(Student record);

    int insertSelective(Student record);

    Student selectByPrimaryKey(String sid);

    int updateByPrimaryKeySelective(Student record);

    int updateByPrimaryKey(Student record);

    List<Student> selectBySnamePager(Student student,PageBean PageBean);
}

StudentBizImpl

package com.csdn.xw.Biz.Impl;

import com.csdn.xw.Biz.StudentBiz;
import com.csdn.xw.mapper.StudentMapper;
import com.csdn.xw.model.Student;
import com.csdn.xw.util.PageBean;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;

/**
 * @author Java方文山
 * @compay csdn_Java方文山
 * @create 2023-09-07-16:22
 */
@Service
public class StudentBizImpl implements StudentBiz {
    @Autowired
    private StudentMapper studentMapper;

    @Override
    public int deleteByPrimaryKey(String sid) {
        return studentMapper.deleteByPrimaryKey(sid);
    }

    @Override
    public int insert(Student record) {
        return studentMapper.insert(record);
    }

    @Override
    public int insertSelective(Student record) {
        return studentMapper.insertSelective(record);
    }

    @Override
    public Student selectByPrimaryKey(String sid) {
        return studentMapper.selectByPrimaryKey(sid);
    }

    @Override
    public int updateByPrimaryKeySelective(Student record) {
        return studentMapper.updateByPrimaryKeySelective(record);
    }

    @Override
    public int updateByPrimaryKey(Student record) {
        return studentMapper.updateByPrimaryKey(record);
    }

    @Override
    public List<Student> selectBySnamePager(Student student, PageBean PageBean) {
        return studentMapper.selectBySnamePager(student);
    }
}

至此，我们的增删改查加模糊查询的分页所有方法就写完了。

三、controller层代码编写

首先建一个名为web的包，随后建立一个StudentController。

StudentController

@Controller
@RequestMapping("/student")
public class StudentController {

    @Autowired
    private StudentBiz stubiz;

//    增
    @RequestMapping("/add")
    public String add(Student student){
        stubiz.insertSelective(student);
        return "redirect:list";
    }

    //    删
    @RequestMapping("/del")
    public String del(Student student){
        stubiz.deleteByPrimaryKey(student.getSid());
        return "redirect:list";
    }

//    查
    @RequestMapping("/list")
    public String list(Student student, HttpServletRequest request){
        PageBean pageBean=new PageBean();
        pageBean.setRequest(request);
        List<Student> students = stubiz.selectBySnamePager(student, pageBean);
        request.setAttribute("slist",students);
        request.setAttribute("pageBean",pageBean);
        return "student/list";
    }
//    改
    @RequestMapping("/edit")
    public String edit(Student student){
        stubiz.updateByPrimaryKeySelective(student);
        return "redirect:list";
    }
//    模糊分页查询
    @RequestMapping("/PreSave")
    public String PreSave(Student student, HttpServletRequest request){
        if(student!=null && student.getSid()!=null){
            Student s = stubiz.selectByPrimaryKey(student.getSid());
            request.setAttribute("s",s);
        }
        return "student/edit";
    }

}

查询这用的是绝对路径，所以还要加上student。

四、前台代码与分页代码

这里我需要用到分页，所以将以前我所编写的自定义分页标签加入。

首先建立一个名为tag的包，将PageTag.java导入

①PageTag.java

package com.csdn.xw.tag;

import com.csdn.xw.util.PageBean;

import javax.servlet.jsp.JspException;
import javax.servlet.jsp.JspWriter;
import javax.servlet.jsp.tagext.BodyTagSupport;
import java.io.IOException;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;

public class PageTag extends BodyTagSupport{
    private PageBean pageBean;// 包含了所有分页相关的元素
    
    public PageBean getPageBean() {
        return pageBean;
    }

    public void setPageBean(PageBean pageBean) {
        this.pageBean = pageBean;
    }

    @Override
    public int doStartTag() throws JspException {
//        没有标签体，要输出内容
        JspWriter out = pageContext.getOut();
        try {
            out.print(toHTML());
        } catch (IOException e) {
            e.printStackTrace();
        }
        return super.doStartTag();
    }

    private String toHTML() {
        StringBuffer sb = new StringBuffer();
//        隐藏的form表单---这个就是上一次请求下次重新发的奥义所在
//        上一次请求的URL
        sb.append("<form action='"+pageBean.getUrl()+"' id='pageBeanForm' method='post'>");
        sb.append("    <input type='hidden' name='page'>");
//        上一次请求的参数
        Map<String, String[]> paramMap = pageBean.getParamMap();
        if(paramMap != null && paramMap.size() > 0) {
            Set<Entry<String, String[]>> entrySet = paramMap.entrySet();
            for (Entry<String, String[]> entry : entrySet) {
//                参数名
                String key = entry.getKey();
//                参数值
                for (String value : entry.getValue()) {
//                    上一次请求的参数，再一次组装成了新的Form表单
//                    注意：page参数每次都会提交，我们需要避免
                    if(!"page".equals(key)) {
                        sb.append("    <input type='hidden' name='"+key+"' value='"+value+"' >");
                    }
                }
            }
        }
        sb.append("</form>");
        
//        分页条
        sb.append("<ul class='pagination justify-content-center'>");
        sb.append("    <li class='page-item "+(pageBean.getPage() == 1 ? "disabled" : "")+"'><a class='page-link'");
        sb.append("    href='javascript:gotoPage(1)'>首页</a></li>");
        sb.append("    <li class='page-item "+(pageBean.getPage() == 1 ? "disabled" : "")+"'><a class='page-link'");
        sb.append("    href='javascript:gotoPage("+pageBean.previousPage()+")'>&lt;</a></li>");// less than 小于号
//        sb.append("    <li class='page-item'><a class='page-link' href='#'>1</a></li>");
//        sb.append("    <li class='page-item'><a class='page-link' href='#'>2</a></li>");
        sb.append("    <li class='page-item active'><a class='page-link' href='#'>"+pageBean.getPage()+"</a></li>");
        sb.append("    <li class='page-item "+(pageBean.getPage() == pageBean.maxPage() ? "disabled" : "")+"'><a class='page-link' href='javascript:gotoPage("+pageBean.nextPage()+")'>&gt;</a></li>");
        sb.append("    <li class='page-item "+(pageBean.getPage() == pageBean.maxPage() ? "disabled" : "")+"'><a class='page-link' href='javascript:gotoPage("+pageBean.maxPage()+")'>尾页</a></li>");
        sb.append("    <li class='page-item go-input'><b>到第</b><input class='page-link'");
        sb.append("    type='text' id='skipPage' name='' /><b>页</b></li>");
        sb.append("    <li class='page-item go'><a class='page-link'");
        sb.append("    href='javascript:skipPage()'>确定</a></li>");
        sb.append("    <li class='page-item'><b>共"+pageBean.getTotal()+"条</b></li>");
        sb.append("</ul>");
        
//        分页执行的JS代码
        sb.append("<script type='text/javascript'>");
        sb.append("    function gotoPage(page) {");
        sb.append("        document.getElementById('pageBeanForm').page.value = page;");
        sb.append("        document.getElementById('pageBeanForm').submit();");
        sb.append("    }");
        sb.append("    function skipPage() {");
        sb.append("        var page = document.getElementById('skipPage').value;");
        sb.append("        if (!page || isNaN(page) || parseInt(page) < 1 || parseInt(page) > "+pageBean.maxPage()+") {");
        sb.append("            alert('请输入1~"+pageBean.maxPage()+"的数字');");
        sb.append("            return;");
        sb.append("        }");
        sb.append("        gotoPage(page);");
        sb.append("    }");
        sb.append("</script>");
        
        return sb.toString();
    }
}

将tld文件导入WEB-INF下

②zking.tld

<?xml version="1.0" encoding="UTF-8" ?>

<taglib xmlns="http://java.sun.com/xml/ns/j2ee"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-jsptaglibrary_2_0.xsd"
    version="2.0">
    
  <description>zking 1.1 core library</description>
  <display-name>zking core</display-name>
  <tlib-version>1.1</tlib-version>
  <short-name>zking</short-name>
  <uri>http://jsp.veryedu.cn</uri>
  
  
  <tag>
    <name>page</name>
    <tag-class>com.csdn.xw.tag.PageTag</tag-class>
    <body-content>JSP</body-content>
    <attribute>
        <name>pageBean</name>
        <required>true</required>
        <rtexprvalue>true</rtexprvalue>
    </attribute>
  </tag>
  
</taglib>

③list.jsp

<%--
  Created by IntelliJ IDEA.
  User: 索隆
  Date: 2023/9/8
  Time: 16:32
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib uri="http://jsp.veryedu.cn" prefix="z"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<html>
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    <link
            href="https://cdn.bootcdn.net/ajax/libs/twitter-bootstrap/4.5.0/css/bootstrap.css"
            rel="stylesheet">
    <script
            src="https://cdn.bootcdn.net/ajax/libs/twitter-bootstrap/4.5.0/js/bootstrap.js"></script>
    <title>学生管理首页</title>
    <style type="text/css">
        .page-item input {
            padding: 0;
            width: 40px;
            height: 100%;
            text-align: center;
            margin: 0 6px;
        }

        .page-item input, .page-item b {
            line-height: 38px;
            float: left;
            font-weight: 400;
        }

        .page-item.go-input {
            margin: 0 10px;
        }
    </style>
</head>
<body>
<form class="form-inline"
      action="${pageContext.request.contextPath }/student/list" method="post">
    <div class="form-group mb-2">
        <input type="text" class="form-control-plaintext" name="sname"
               placeholder="请输入学生名称">
        <!--             <input name="rows" value="20" type="hidden"> -->
        <!-- 不想分页 -->
                <%--<input name="pagination" value="false" type="hidden">--%>
    </div>
    <button type="submit" class="btn btn-primary mb-2">查询</button>
    <a class="btn btn-primary mb-2" href="${pageContext.request.contextPath }/student/PreSave">新增</a>
</form>

<table class="table table-striped ">
    <thead>
    <tr>
        <th scope="col">学生ID</th>
        <th scope="col">学生名称</th>
        <th scope="col">学生年龄</th>
        <th scope="col">学生性别</th>
        <th scope="col">操作</th>
    </tr>
    </thead>
    <tbody>
    <c:forEach  var="s" items="${slist }">
        <tr>
            <td>${s.sid }</td>
            <td>${s.sname }</td>
            <td>${s.sage }</td>
            <td>${s.ssex }</td>
            <td>
                <a href="${pageContext.request.contextPath }/student/PreSave?sid=${s.sid}">修改</a>
                <a href="${pageContext.request.contextPath }/student/del?sid=${s.sid}">删除</a>
            </td>
        </tr>
    </c:forEach>
    </tbody>
</table>
<!-- 这一行代码就相当于前面分页需求前端的几十行了 -->
<z:page pageBean="${pageBean }"></z:page>
${pageBean }
${slist}
</body>
</html>

④edit.jsp

<%--
  Created by IntelliJ IDEA.
  User: 索隆
  Date: 2023/9/8
  Time: 16:49
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>编辑界面</title>
</head>
<body>
<center>
编辑界面
<form action="${pageContext.request.contextPath }/${empty s ? 'student/add' : 'student/edit'}" method="post">
    sid:<input type="text" name="sid" value="${s.sid }"><br>
    sname:<input type="text" name="sname" value="${s.sname }"><br>
    sage:<input type="text" name="sage" value="${s.sage }"><br>
    ssex:<input type="text" name="ssex" value="${s.ssex }"><br>
    <input type="submit">
</form>
</center>
</body>
</html>

五、案例测试

5.1.模糊查询

5.2.新增

5.3.修改

5.4.删除

5.5.分页

到这里我的分享就结束了，欢迎到评论区探讨交流！！

💖如果觉得有用的话还请点个赞吧 💖

标签： spring mvc java
本文转载自: https://blog.csdn.net/weixin_74318097/article/details/132737854
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