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springboot连接多个库

一个SpringBoot项目,同时连接两个数据库:比如一个是Mysql数据库,一个是oracle数据库(啥数据库都一样,连接两个同为oracle的数据库,或两个不同的数据库,只需要更改对应的driver-class-name和jdbc-url等即可)注意:连接什么数据库,要引入对应数据库的包。

第一步:

导入pom

<dependency><groupId>com.alibaba</groupId><artifactId>druid</artifactId><version>1.1.0</version></dependency><dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId><scope>runtime</scope></dependency>

第二步:

修改application.yml配置文件(我采用本地的,IP地址是一致的,实际开发中,是两台云服务,两台MySQL地址进行主从读写)

mysql1:driver-class-name: com.mysql.cj.jdbc.Driver
      jdbcUrl: jdbc:mysql://localhost:3306/test?useSSL=false&useUnicode=true&characterEncoding=UTF-8&serverTimezone=GMT%2B8username:"root"password:"12345678"type: com.alibaba.druid.pool.DruidDataSource
    mysql2:driver-class-name: com.mysql.cj.jdbc.Driver
      jdbcUrl: jdbc:mysql://localhost:3306/test1?useSSL=false&useUnicode=true&characterEncoding=UTF-8&serverTimezone=GMT%2B8username:"root"password:"12345678"type: com.alibaba.druid.pool.DruidDataSource

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注意
格式

上面spring.datasource省略了

第三步:

建造配置类:
(1)第一个库配置信息:

/**
 * 数据库leadnews_article
 */@Configuration@MapperScan(basePackages ={"com.example.demo.mapper.db1"}, sqlSessionFactoryRef ="sqlSessionFactoryArticle")publicclassDBSrcArticle{@BeanpublicSqlSessionFactorysqlSessionFactoryArticle(@Qualifier("mysql1")DataSource dataSource)throwsException{MybatisSqlSessionFactoryBean sqlSessionFactory =newMybatisSqlSessionFactoryBean();
        sqlSessionFactory.setDataSource(dataSource);
        sqlSessionFactory.setMapperLocations(newPathMatchingResourcePatternResolver().getResources("classpath:mapper/db1/*.xml"));return sqlSessionFactory.getObject();}@BeanpublicSqlSessionTemplatesqlSessionTemplateArticle(@Qualifier("sqlSessionFactoryArticle")SqlSessionFactory sqlSessionFactory)throwsException{returnnewSqlSessionTemplate(sqlSessionFactory);}}

(2)第二个库配置

/**
 * 数据库leadnews_user
 */@Configuration@MapperScan(basePackages ={"com.example.demo.mapper.db2"}, sqlSessionFactoryRef ="sqlSessionFactoryUser")publicclass dBSrcUser {@Bean@PrimarypublicSqlSessionFactorysqlSessionFactoryUser(@Qualifier("mysql2")DataSource dataSource)throwsException{MybatisSqlSessionFactoryBean sqlSessionFactory =newMybatisSqlSessionFactoryBean();
        sqlSessionFactory.setDataSource(dataSource);
        sqlSessionFactory.setMapperLocations(newPathMatchingResourcePatternResolver().getResources("classpath:mapper/db2/*.xml"));return sqlSessionFactory.getObject();}@Bean@PrimarypublicSqlSessionTemplatesqlSessionTemplateUser(@Qualifier("sqlSessionFactoryUser")SqlSessionFactory sqlSessionFactory)throwsException{returnnewSqlSessionTemplate(sqlSessionFactory);}}

(3)数据源配置:

/**
 * 数据源配置
 */@ConfigurationpublicclassDataSourceConfig{@Primary@Bean(name ="mysql1")@ConfigurationProperties(prefix ="spring.datasource.mysql1")publicDataSourcedBSrcArticle(){returnDataSourceBuilder.create().build();}@Primary@Bean(name ="mysql2")@ConfigurationProperties(prefix ="spring.datasource.mysql2")publicDataSourcedBSrcUser(){returnDataSourceBuilder.create().build();}}
注意:连接两个以上的数据库,需要对mapper文件夹进行
分包

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第四步:

在启动类中加上这三个注解:

@SpringBootApplication(exclude ={DataSourceAutoConfiguration.class})@MapperScan(basePackages ={"com.example.demo.entity.db1"}, sqlSessionFactoryRef ="sqlSessionFactoryArticle")@MapperScan(basePackages ={"com.example.demo.entity.db2"}, sqlSessionFactoryRef ="sqlSessionFactoryUser")

此时:已经可以访问两个数据库内容了。

标签: 后端 java springboot

本文转载自: https://blog.csdn.net/sunyingboaini/article/details/139600939
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