springboot-配置多个数据源

1、创建一个datasource包，新建DataSource1，DataSource2两个文件，通过注解来配置数据源

DataSource1：

package com.springboot.datasource;

import org.apache.ibatis.session.SqlSessionFactory;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.SqlSessionTemplate;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.boot.autoconfigure.jdbc.DataSourceBuilder;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;

import javax.sql.DataSource;

@Configuration//注解到spring容器中
@MapperScan(basePackages = "com.springboot.data1.mapper",sqlSessionFactoryRef = "data1SqlSessionFactory")
public class DataSource1 {

    /**
     * 返回data1数据库的数据源
     * @return
     */
    @Bean(name="data1Source")
    @Primary//主数据源
    @ConfigurationProperties(prefix = "spring.datasource.data1")
    public DataSource dataSource(){
        return DataSourceBuilder.create().build();
    }

    /**
     * 返回data1数据库的会话工厂
     * @param ds
     * @return
     * @throws Exception
     */
    @Bean(name = "data1SqlSessionFactory")
    @Primary
    public SqlSessionFactory sqlSessionFactory(@Qualifier("data1Source") DataSource ds) throws Exception{
        SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
        bean.setDataSource(ds);
        return bean.getObject();
    }

    /**
     * 返回data1数据库的会话模板
     * @param sessionFactory
     * @return
     * @throws Exception
     */
    @Bean(name = "data1SqlSessionTemplate")
    @Primary
    public SqlSessionTemplate sqlSessionTemplate(@Qualifier("data1SqlSessionFactory") SqlSessionFactory sessionFactory) throws  Exception{
        return  new SqlSessionTemplate(sessionFactory);
    }

    /**
     * 返回data1数据库的事务
     * @param ds
     * @return
     */
    @Bean(name = "data1TransactionManager")
    @Primary
    public DataSourceTransactionManager transactionManager(@Qualifier("data1Source") DataSource ds){
        return new DataSourceTransactionManager(ds);
    }
}

DataSource2：

package com.springboot.datasource;

import org.apache.ibatis.session.SqlSessionFactory;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.SqlSessionTemplate;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.boot.autoconfigure.jdbc.DataSourceBuilder;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;

import javax.sql.DataSource;

@Configuration//注解到spring容器中
@MapperScan(basePackages = "com.springboot.data2.mapper",sqlSessionFactoryRef = "data2SqlSessionFactory")
public class DataSource2 {

    /**
     * 返回data2数据库的数据源
     * @return
     */
    @Bean(name="data2Source")
    @ConfigurationProperties(prefix = "spring.datasource.data2")
    public DataSource dataSource(){
        return DataSourceBuilder.create().build();
    }

    /**
     * 返回data2数据库的会话工厂
     * @param ds
     * @return
     * @throws Exception
     */
    @Bean(name = "data2SqlSessionFactory")
    public SqlSessionFactory sqlSessionFactory(@Qualifier("data2Source") DataSource ds) throws Exception{
        SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
        bean.setDataSource(ds);
        return bean.getObject();
    }

    /**
     * 返回data2数据库的会话模板
     * @param sessionFactory
     * @return
     * @throws Exception
     */
    @Bean(name = "data2SqlSessionTemplate")
    public SqlSessionTemplate sqlSessionTemplate(@Qualifier("data2SqlSessionFactory") SqlSessionFactory sessionFactory) throws  Exception{
        return  new SqlSessionTemplate(sessionFactory);
    }

    /**
     * 返回data2数据库的事务
     * @param ds
     * @return
     */
    @Bean(name = "data2TransactionManager")
    public DataSourceTransactionManager transactionManager(@Qualifier("data2Source") DataSource ds){
        return new DataSourceTransactionManager(ds);
    }
}

2、在application.properties文件配置两个数据源

spring.datasource.data1.url=jdbc:mysql://127.0.0.1:3306/mysql-boot
spring.datasource.data1.username=root
spring.datasource.data1.password=123123
spring.datasource.data1.driver-class-name=com.mysql.jdbc.Driver

spring.datasource.data2.url=jdbc:mysql://127.0.0.1:3306/mysql-confswh
spring.datasource.data2.username=root
spring.datasource.data2.password=123123
spring.datasource.data2.driver-class-name=com.mysql.jdbc.Driver

3、两个测试的Service&Mapper

4、Controller调用

@RequestMapping("getTopicList")
    public List<Map<String,Object>> getTopicList(){
        List<Map<String,Object>> list1 = userServiceData1.getTopicListData1();
        List<Map<String,Object>> list2 = userServiceData2.getTopicListData2();
        return list1;
    }