1. 引入jar包
pom.xml文件
4.0.0 org.springframework.boot spring-boot-starter-parent 2.5.6 com.multi.datasource demo 0.0.1-SNAPSHOT demo Demo project for Spring Boot 1.8 org.springframework.boot spring-boot-starter org.springframework.boot spring-boot-starter-web org.mybatis.spring.boot mybatis-spring-boot-starter 1.3.2 com.alibaba druid 1.1.8 mysql mysql-connector-java org.projectlombok lombok 1.16.22 org.springframework.boot spring-boot-starter-test test org.springframework.boot spring-boot-maven-plugin org.projectlombok lombok
2. properties配置
分别准备两个数据源
server.port=18888 mybatis.mapper-locations=classpath:mapper/*.xml my1.datasource.url=jdbc:mysql://10.0.0.125:3306/wyl?autoReconnect=true my1.datasource.driverClassName=com.mysql.cj.jdbc.Driver my1.datasource.username=root my1.datasource.password=123456 my2.datasource.url=jdbc:mysql://10.0.0.160:3306/wyl?autoReconnect=true my2.datasource.driverClassName=com.mysql.cj.jdbc.Driver my2.datasource.username=root my2.datasource.password=123456
3. 分别配置两个数据源
第一个数据源
package com.multi.datasource.config;
import com.alibaba.druid.pool.DruidDataSource;
import org.apache.ibatis.session.SqlSessionFactory;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;
import javax.sql.DataSource;
@Configuration
@MapperScan(basePackages = My1DataSourceConfig.PACKAGE, sqlSessionFactoryRef = "my1SqlSessionFactory")
public class My1DataSourceConfig {
static final String PACKAGE = "com.multi.datasource.dao.my1";
static final String MAPPER_LOCATION = "classpath:mapper/*.xml";
@Value("${my1.datasource.url}")
private String url;
@Value("${my1.datasource.username}")
private String user;
@Value("${my1.datasource.password}")
private String password;
@Value("${my1.datasource.driverClassName}")
private String driverClass;
@Bean(name = "my1DataSource")
public DataSource my1DataSource() {
DruidDataSource dataSource = new DruidDataSource();
dataSource.setDriverClassName(driverClass);
dataSource.setUrl(url);
dataSource.setUsername(user);
dataSource.setPassword(password);
dataSource.setMaxWait(Integer.MAX_VALUE);
dataSource.setTestOnBorrow(true);
dataSource.setTestOnReturn(true);
dataSource.setTestWhileIdle(true);
return dataSource;
}
@Bean(name = "my1TransactionManager")
public DataSourceTransactionManager my1TransactionManager() {
return new DataSourceTransactionManager(my1DataSource());
}
@Bean(name = "my1SqlSessionFactory")
public SqlSessionFactory my1SqlSessionFactory(@Qualifier("my1DataSource") DataSource my1DataSource)
throws Exception {
final SqlSessionFactoryBean sessionFactory = new SqlSessionFactoryBean();
sessionFactory.setDataSource(my1DataSource);
sessionFactory.setMapperLocations(
new PathMatchingResourcePatternResolver().getResources(My1DataSourceConfig.MAPPER_LOCATION));
return sessionFactory.getObject();
}
}
第二个数据源
package com.multi.datasource.config;
import com.alibaba.druid.pool.DruidDataSource;
import org.apache.ibatis.session.SqlSessionFactory;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;
import javax.sql.DataSource;
@Configuration
@MapperScan(basePackages = My1DataSourceConfig.PACKAGE, sqlSessionFactoryRef = "my1SqlSessionFactory")
public class My1DataSourceConfig {
static final String PACKAGE = "com.multi.datasource.dao.my1";
static final String MAPPER_LOCATION = "classpath:mapper/*.xml";
@Value("${my1.datasource.url}")
private String url;
@Value("${my1.datasource.username}")
private String user;
@Value("${my1.datasource.password}")
private String password;
@Value("${my1.datasource.driverClassName}")
private String driverClass;
@Bean(name = "my1DataSource")
public DataSource my1DataSource() {
DruidDataSource dataSource = new DruidDataSource();
dataSource.setDriverClassName(driverClass);
dataSource.setUrl(url);
dataSource.setUsername(user);
dataSource.setPassword(password);
dataSource.setMaxWait(Integer.MAX_VALUE);
dataSource.setTestOnBorrow(true);
dataSource.setTestOnReturn(true);
dataSource.setTestWhileIdle(true);
return dataSource;
}
@Bean(name = "my1TransactionManager")
public DataSourceTransactionManager my1TransactionManager() {
return new DataSourceTransactionManager(my1DataSource());
}
@Bean(name = "my1SqlSessionFactory")
public SqlSessionFactory my1SqlSessionFactory(@Qualifier("my1DataSource") DataSource my1DataSource)
throws Exception {
final SqlSessionFactoryBean sessionFactory = new SqlSessionFactoryBean();
sessionFactory.setDataSource(my1DataSource);
sessionFactory.setMapperLocations(
new PathMatchingResourcePatternResolver().getResources(My1DataSourceConfig.MAPPER_LOCATION));
return sessionFactory.getObject();
}
}
4. Dao目录
为了区分两个数据源，分别设置了不同的目录
package com.multi.datasource.dao.my1;
import com.multi.datasource.entity.UserEntity;
import org.apache.ibatis.annotations.Mapper;
@Mapper
public interface Test1Mapper {
UserEntity query();
}
package com.multi.datasource.dao.my2;
import com.multi.datasource.entity.UserEntity;
import org.apache.ibatis.annotations.Mapper;
@Mapper
public interface Test2Mapper {
UserEntity query();
}
5. Entity
package com.multi.datasource.entity;
import lombok.Data;
@Data
public class UserEntity {
private String userName;
}
6. Mapper文件
从my1数据源查询
从my2数据源查询
7. Controller测试
package com.multi.datasource.controller;
import com.multi.datasource.dao.my1.Test1Mapper;
import com.multi.datasource.dao.my2.Test2Mapper;
import com.multi.datasource.entity.UserEntity;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import javax.annotation.Resource;
@RestController
public class TestController {
@Resource
private Test1Mapper test1Mapper;
@Resource
private Test2Mapper test2Mapper;
@RequestMapping("query")
public void query() {
UserEntity user1 = test1Mapper.query();
System.out.println("my1 dataSource:" + user1);
UserEntity user2 = test2Mapper.query();
System.out.println("my2 dataSource:" + user2);
}
}
两个数据源，对应的user_name分别是zhangsan和lisi
8. 结果验证
访问 http://localhost:18888/query，结果如下
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