如果想要看springboot配置mybatis的多数据源，请参看本人博客：

1、springboot中配置

案例中使用的数据源是阿里巴巴的druid，其他数据源是一样的

1）创建两个数据源

yml中配置两个不同的前缀的数据源

spring:
  datasource:
    #第一个数据源
    username: root
    password: root
    url: jdbc:mysql://localhost:3306/mysql?useUnicode=true&characterEncoding=utf-8&useSSL=false&allowMultiQueries=true
    driver-class-name: com.mysql.jdbc.Driver
    type: com.alibaba.druid.pool.DruidDataSource
    initialSize: 5
    minIdle: 5
    maxActive: 20
    maxWait: 60000 
    timeBetweenEvictionRunsMillis: 60000
    minEvictableIdleTimeMillis: 300000
    validationQuery: SELECT 1 FROM DUAL
    testWhileIdle: true
    testOnBorrow: false
    testOnReturn: false
    poolPreparedStatements: true
    #第二个数据源
    secondary:
            #第一个数据源
        username: root
        password: root
        url: jdbc:mysql://localhost:3306/mysql2?useUnicode=true&characterEncoding=utf-8&useSSL=false&allowMultiQueries=true
        driver-class-name: com.mysql.jdbc.Driver
        type: com.alibaba.druid.pool.DruidDataSource
        initialSize: 5
        minIdle: 5
        maxActive: 20
        maxWait: 60000 
        timeBetweenEvictionRunsMillis: 60000
        minEvictableIdleTimeMillis: 300000
        validationQuery: SELECT 1 FROM DUAL
        testWhileIdle: true
        testOnBorrow: false
        testOnReturn: false
        poolPreparedStatements: true

数据源1：

package com.cyjz.config;

import com.alibaba.druid.pool.DruidDataSource;
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 javax.sql.DataSource;


@Configuration
public class DataSourceOneConfig {
  

    @Bean
    @ConfigurationProperties(prefix = "spring.datasource")
    @Primary //设置主数据源1
    public DataSource dataSource(){
        return new DruidDataSource();
    }
}

数据源2：

package com.cyjz.config;

import com.alibaba.druid.pool.DruidDataSource;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import javax.sql.DataSource;


@Configuration
public class DataSourceTwoConfig {

    @Bean(name = "dataSourceTwo")
    @ConfigurationProperties(prefix = "spring.datasource.secondary")
    public DataSource DataSourceOne(){
        return new DruidDataSource();
    }
}

2）创建一个JdbcTemplate的bean

package com.cyjz.config;

import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.jdbc.core.JdbcTemplate;

import javax.sql.DataSource;

@Configuration
public class JDBCTemplate {

    @Bean(name = "jdbcTemplate")
    public JdbcTemplate jdbcTemplate(@Qualifier("dataSource") DataSource dataSource){
        JdbcTemplate  jdbcTemplate = new JdbcTemplate();
        jdbcTemplate.setDataSource(dataSource);
        return jdbcTemplate;
    }

    @Bean(name = "jdbcTemplate2")
    public JdbcTemplate jdbcTemplate2(@Qualifier("dataSourceTwo") DataSource dataSource){
        JdbcTemplate  jdbcTemplate = new JdbcTemplate();
        jdbcTemplate.setDataSource(dataSource);
        return jdbcTemplate;
    }

}

3）调用的时候

@Autowired
    @Qualifier("jdbcTemplate")
    private JdbcTemplate jdbcTemplate;
    
    @Autowired
    @Qualifier("jdbcTemplate2")
    private JdbcTemplate jdbcTemplate2;

注意@Qualifier，引用的就是bean的名字

2.spring项目中配置jdbcTemplate多数据源

1)配置文件：

jdbc.url=jdbc\:mysql\://localhost\:3306/mysql?useUnicode\=true&characterEncoding\=utf8&autoReconnect\=true&useSSL\=false
jdbc.username=root
jdbc.password=mysql
jdbc.driverClassName=com.mysql.jdbc.Driver

jdbc2.url=jdbc\:mysql\://localhost\:3306/mysql?useUnicode\=true&characterEncoding\=utf8&autoReconnect\=true&useSSL\=false
jdbc2.username=root
jdbc2.password=mysql
jdbc2.driverClassName=com.mysql.jdbc.Driver

2)spring的配置文件

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"
     xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.1.xsd
  http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.1.xsd">

  <!-- 加载config下面的jdbc.properties文件 -->
  <context:property-placeholder location="classpath:config/jdbc.properties" />

  <!-- 配置多数据源1DataSource -->
  <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource#DruidDataSource()">
    <property name="driver" value="${jdbc.driverName}"/>
    <property name="driverUrl" value="${jdbc.url}"/>
    <property name="user" value="${jdbc.username}"/>
    <property name="password" value="${jdbc.password}"/>
  </bean>

  <!-- 配置多数据源sdconddataSource -->
  <bean id="seconddataSource" class="com.alibaba.druid.pool.DruidDataSource#DruidDataSource()">
    <property name="driver" value="${jdbc2.driverName}"/>
    <property name="driverUrl" value="${jdbc2.url}"/>
    <property name="user" value="${jdbc2.username}"/>
    <property name="password" value="${jdbc2.password}"/>
  </bean>
  
  <!-- jdbc关联数据源 -->
  <bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
    <property name="dataSource" ref="dataSource"/>
  </bean>
  <bean id="jdbcTemplate2" class="org.springframework.jdbc.core.JdbcTemplate">
    <property name="dataSource" ref="seconddataSource"/>
  </bean>

</beans>

3）调用同springboot