#默认使用 tomcat-jdbc

spring.datasource.type=org.apache.tomcat.jdbc.pool.DataSource

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

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);

    }

}

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);

    }

}

    @RequestMapping("getTopicList")

    public List<Map<String,Object>> getTopicList(){

        List<Map<String,Object>> list1 = userServiceData1.getTopicListData1();

        List<Map<String,Object>> list2 = userServiceData2.getTopicListData2();

        return list1;

    }