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TYUT太原理工大学2022javaweb编程大题

MVC操作(30分)

编程题就是给你一个表,几个jsp页面的显示图,让你根据题意写出MVC编码

其中,MVC包含了3部分:

1、视图(V)——编写jsp页面(HTML、CSS代码)

2、模型(M)——编写javabean.java(字符串处理、数据库操作)

3、控制器(C)——编写servlet.java(封装对HTTP请求的处理)

主要出的题型就这么几类:用户注册、用户登录、用户留言、图书管理

题目简单的话,只会要求我们补充MVC,难一点的话会让我们写全部的MVC,这次大题30分,估计难一点

大家能理解的理解,理解不了就背下来(都是手打的代码,难免出错,出错的代码段大家评论区告我)

用户留言:

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1、jsp:

(1)addMessage.jsp:

<%@ page language="java" contentType="text/html;charset=UTF-8" pageEncoding="UTF-8" %>
<html>
    <head>
        <title>网页左上角要写的标题</title>
    </head>
    <body>
        <h3>用户留言</h3>
        <form action="MessageServlet" method="post">
        昵称:<input type="text" name="nickname" /><br/><br/>
        主题:<input type="text" name="title" /><br/><br/>
        内容:<br/>
        <textarea rows="5" cols="25" name="content"></textarea><br/><br/>
        <input type="submit" value="留言"/>
        <input type="reset" value="重置"/>
        </form>
    </body>
</html>

(2)addMessageSuccess.jsp:

<%@ page language="java" contentType="text/html;charset=UTF-8" pageEncoding="UTF-8" %>
<html>
    <head>
        <title>网页左上角要写的标题</title>
    </head>
    <body>
        <h3>添加留言成功!<a href="addMessage.jsp">再次留言</a></h3>
    </body>
</html>

2、javabean:

import java.sql.*;
public class MessageBean{
    private Integer id;
    private String nickname;
    private String title;
    private String content;
    public Integer getId(){
        return id;
    }   
    public void setId(Integer id){
        this.id=id;
    }           
    public String getNickname(){
        return nickname;
    }   
    public void setNickname(String nickname){
        this.nickname=nickname;
    }    
//......剩下的getter和setter方法省略,考试自己写上
     public boolean addMessage(MessageBean message){
         Integer id=message.getId();
         String title=message.getTitle();
         //......剩下两个省略,考试写
         try{
         Class.forName("com.mysql.jdbc.Driver");
         String url="jdbc:mysql://localhost:3306/jdbc1";
         Connection conn=DriverManager.getConnection(url,"root","123");
         String sql="insert into message(nickname,title,content)values(?,?,?)"
         PreparedStatement ps=conn.prepareStatement(sql);
         ps.setString(1,nickname);
         ps.setString(2,title);
         ps.setString(3,content);
         int result=ps.executeUpdate();
         if(result>0)
             return turn;
         else
             return false;
         }catch(Exception e)
             {e.printStackTrace();}
         return false;        
     }
 }
}

3、servlet:

import java.io.IOException;
import javax.servlet.*;
import edu.tyut.bean.MessageBean;
@WebServlet("/MessageServlet")
public class MessageServlet extends HttpServlet{
    protected void doGet(HttpServletRequest request,HttpServletResponse response)throws ServletException,IOException{
        request.setCharacterEncoding("UTF-8");
        String nickname=request.getParameter("nickname");
        String title=request.getParameter("title");
        String content=request.getParameter("content");
        
        MessageBean message=new MessageBean();
        message.setNickname(nickname);
        message.setTitle(title);
        message.setContent(content);
        boolean result=message.addMessage(message);
        if(result)
            response.sendRedirect("addMessageSuccess.jsp");
        else
            response.sendRedirect("addMessage.jsp");
    }
    protected void doPost(HttpServletRequest request,HttpServletResponse)throws ServletException,IOException{
        doGet(request,response);
    }
}

用户注册:

1、jsp:

(1)register.jsp:

<%@ page language="java" contentType="text/html;charset=UTF-8" pageEncoding="UTF-8" %>
<html>
    <head>
        <title>网页左上角要写的标题</title>
    </head>
    <body>
        <h3>用户注册</h3>
        <form action="RegisterServlet" method="post">
        用户名:<input type="text" name="name" /><br/><br/>
        密码:<input type="text" name="password" /><br/><br/>
        <input type="submit" value="提交"/>
        <input type="reset" value="重置"/>
        </form>
    </body>
</html>

(2)welcome.jsp:

<%@ page language="java" contentType="text/html;charset=UTF-8" pageEncoding="UTF-8" %>
<html>
    <head>
        <title>网页左上角要写的标题</title>
    </head>
    <body>
        <h3>注册成功<a href="register.jsp">再次注册</a></h3>
    </body>
</html>

2、javabean:

import java.sql.*;
public class UserBean{
    private Integer id;
    private String name;
    private String password;
    public Integer getId(){
        return id;
    }   
    public void setId(Integer id){
        this.id=id;
    }           
    public String getName(){
        return name;
    }   
    public void setName(String name){
        this.name=name;
    }           
    public String getPassword(){
        return password;
    }   
    public void setPassword(String password){
        this.password=password;
    }    
     public boolean insortUser(UserBean user){
         Integer id=user.getId();
         String name=user.getName();
         String password=user.getPassword();
         try{
         Class.forName("com.mysql.jdbc.Driver");
         String url="jdbc:mysql://localhost:3306/jdbc1";
         Connection conn=DriverManager.getConnection(url,"root","123");
         String sql="insert into user(name,password)values(?,?)"
         PreparedStatement ps=conn.prepareStatement(sql);
         ps.setString(1,name);
         ps.setString(2,password);
         int result=ps.executeUpdate();
         if(result>0)
             return turn;
         else
             return false;
         }catch(Exception e)
             {e.printStackTrace();}
         return false;        
     }
 }
}

3、servlet:

import java.io.IOException;
import javax.servlet.*;
import edu.tyut.bean.RegisterServlet;
@WebServlet("/RegisterServlet")
public class RegisterServlet extends HttpServlet{
    protected void doGet(HttpServletRequest request,HttpServletResponse response)throws ServletException,IOException{
        request.setCharacterEncoding("UTF-8");
        String name=request.getParameter("name");
        String password=request.getParameter("password");
        
        UserBean user=new UserBean();
        user.setName(name);
        user.setPassword(password);
        boolean result=user.register(user);
        if(result)
            response.sendRedirect("welcome.jsp");
        else
            response.sendRedirect("register.jsp");
    }
    protected void doPost(HttpServletRequest request,HttpServletResponse)throws ServletException,IOException{
        doGet(request,response);
    }
}

** 用户登录:**

1、jsp:

(1)login.jsp:

<%@ page language="java" contentType="text/html;charset=UTF-8" pageEncoding="UTF-8" %>
<html>
    <head>
        <title>网页左上角要写的标题</title>
    </head>
    <body>
        <h3>用户登录</h3>
        <form action="LoginServlet" method="post">
        用户名:<input type="text" name="name" /><br/><br/>
        密码:<input type="text" name="password" /><br/><br/>
        <input type="submit" value="登录"/>
        <input type="reset" value="重置"/>
        </form>
    </body>
</html>

(2)

loginSuccess.jsp:

<%@ page language="java" contentType="text/html;charset=UTF-8" pageEncoding="UTF-8" %>
<html>
    <head>
        <title>网页左上角要写的标题</title>
    </head>
    <body>
        <h3>登录成功<a href="login.jsp">再次注册</a></h3>
    </body>
</html>

2、javabean:

import java.sql.*;
public class UserBean{
    private Integer id;
    private String name;
    private String password;
    public Integer getId(){
        return id;
    }   
    public void setId(Integer id){
        this.id=id;
    }           
    public String getName(){
        return name;
    }   
    public void setName(String name){
        this.name=name;
    }           
    public String getPassword(){
        return password;
    }   
    public void setPassword(String password){
        this.password=password;
    }    
     public boolean loginUser(UserBean user){
         Integer id=user.getId();
         String name=user.getName();
         String password=user.getPassword();
         try{
         Class.forName("com.mysql.jdbc.Driver");
         String url="jdbc:mysql://localhost:3306/jdbc1";
         Connection conn=DriverManager.getConnection(url,"root","123");
         String sql="insert into user(name,password)values(?,?)"
         PreparedStatement ps=conn.prepareStatement(sql);
         ps.setString(1,name);
         ps.setString(2,password);
         int result=ps.executeUpdate();
         if(result>0)
             return turn;
         else
             return false;
         }catch(Exception e)
             {e.printStackTrace();}
         return false;        
     }
 }
}

3、servlet:

import java.io.IOException;
import javax.servlet.*;
import edu.tyut.bean.LoginServlet;
@WebServlet("/LoginServlet")
public class LoginServlet extends HttpServlet{
    protected void doGet(HttpServletRequest request,HttpServletResponse response)throws ServletException,IOException{
        request.setCharacterEncoding("UTF-8");
        String name=request.getParameter("name");
        String password=request.getParameter("password");
        
        UserBean user=new UserBean();
        user.setName(name);
        user.setPassword(password);
        boolean result=user.register(user);
        if(result)
            response.sendRedirect("loginSuccess.jsp");
        else
            response.sendRedirect("login.jsp");
    }
    protected void doPost(HttpServletRequest request,HttpServletResponse)throws ServletException,IOException{
        doGet(request,response);
    }
}

整体看下来,其实MVC的题型大同小异,我们只需要根据题意,将几个必要的参数修改即可

标签: 学习 mvc

本文转载自: https://blog.csdn.net/m0_55298718/article/details/125158425
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