mybatis多数据源

相关代码如下：
application.properties:

#spring.datasource.username=root
#spring.datasource.password=12345
#spring.datasource.jdbcUrl=jdbc:mysql://localhost:3306/test01?userUnicode=true&characterEncoding=UTF-8&serverTimezone=Asia/Shanghai
#默认的数据源配置如上，但是现在需要配置多数据源，所以需要自定义配置数据源，如下配置多数据源参数，默认是不会被spring识别的，因为下面的key都是自定义的，所以需要自己配置DataSource和MybatisConfig(注入SqlSessionFactory  和 SqlSessionTemplate)

spring.datasource.one.username=root
spring.datasource.one.password=12345
spring.datasource.one.jdbcUrl=jdbc:mysql://localhost:3306/test01?userUnicode=true&characterEncoding=UTF-8&serverTimezone=Asia/Shanghai

spring.datasource.two.username=root
spring.datasource.two.password=12345
spring.datasource.two.jdbcUrl=jdbc:mysql://localhost:3306/test02?userUnicode=true&characterEncoding=UTF-8&serverTimezone=Asia/Shanghai

DataSourceConfig:

package com.cls.mybatismulti.config;

import com.zaxxer.hikari.HikariDataSource;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import javax.sql.DataSource;

/**
 * @author by CLS
 * @Classname DataSourceConfig
 * @Description TODO
 * @Date 2021/5/16/0016 22:19:19
 */
@Configuration
public class DataSourceConfig {

    @Bean
//    指定数据源是依据配置文件中的那些参数来构建的：依据配置文件中 spring.datasource.one前缀开头的属性构建数据源，
//    现在注入了两个 HikariDataSource 对象，然后在创建MybaitsConfig配置两个mybatis实例
    @ConfigurationProperties(prefix = "spring.datasource.one")
    DataSource  dsOne(){
        return new HikariDataSource();
    }

    @Bean
    @ConfigurationProperties(prefix = "spring.datasource.two")
    DataSource  dsTwo(){
        return new HikariDataSource();
    }

}

MyBatisConfigOne:

package com.cls.mybatismulti.config;

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.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import javax.sql.DataSource;

/**
 * @author by CLS
 * @Classname MyBatisConfigOne
 * @Description TODO
 * @Date 2021/5/16/0016 22:22:03
 */

/**
 * 配置SqlSessionFactory  和 SqlSessionTemplate
 */
@Configuration
//因为有两个数据源，需要扫描不一样的地方 所以需要配置mapperscan
@MapperScan(basePackages = "com.cls.mybatismulti.mapper1",
            sqlSessionFactoryRef = "sqlSessionFactory1",
            sqlSessionTemplateRef = "sqlSessionTemplate1")
public class MyBatisConfigOne {

    @Autowired
    //这里有两个DataSource实例，所以需要指定
    @Qualifier("dsOne")
    DataSource ds;

    @Bean
    SqlSessionFactory sqlSessionFactory1(){
        SqlSessionFactory sqlSessionFactory = null;
        try {
            SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
            bean.setDataSource(ds);
            sqlSessionFactory = bean.getObject();
        } catch (Exception e) {
            e.printStackTrace();
        }
        return sqlSessionFactory;
    }

    @Bean
    SqlSessionTemplate sqlSessionTemplate1(){
        return new SqlSessionTemplate(sqlSessionFactory1());
    }

}

MyBatisConfigTwo:

package com.cls.mybatismulti.config;

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.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import javax.sql.DataSource;

/**
 * @author by CLS
 * @Classname MyBatisConfigOne
 * @Description TODO
 * @Date 2021/5/16/0016 22:22:03
 */
@Configuration
@MapperScan(basePackages = "com.cls.mybatismulti.mapper2",
            sqlSessionFactoryRef = "sqlSessionFactory2",
            sqlSessionTemplateRef = "sqlSessionTemplate2")
public class MyBatisConfigTwo {

    @Autowired
    @Qualifier("dsTwo")
    DataSource ds;

    @Bean
    SqlSessionFactory sqlSessionFactory2(){
        SqlSessionFactory sqlSessionFactory = null;
        try {
            SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
            bean.setDataSource(ds);
            sqlSessionFactory = bean.getObject();
        } catch (Exception e) {
            e.printStackTrace();
        }
        return sqlSessionFactory;
    }

    @Bean
    SqlSessionTemplate sqlSessionTemplate2(){
        return new SqlSessionTemplate(sqlSessionFactory2());
    }

}

测试：

package com.cls.mybatismulti;

import com.cls.mybatismulti.mapper1.UserMapper1;
import com.cls.mybatismulti.mapper2.UserMapper2;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;

@SpringBootTest
class MybatismultiApplicationTests {

    @Autowired
    UserMapper1 userMapper1;

    @Autowired
    UserMapper2 userMapper2;
    @Test
    void contextLoads() {
        System.out.println("userMapper1.getAllUsers() = " + userMapper1.getAllUsers());
        System.out.println("userMapper2.getAllUsers() = " + userMapper2.getAllUsers());
    }

}

目录结构：

测试：

package com.cls.mybatismulti;

import com.cls.mybatismulti.mapper1.UserMapper1;
import com.cls.mybatismulti.mapper2.UserMapper2;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;

@SpringBootTest
class MybatismultiApplicationTests {

    @Autowired
    UserMapper1 userMapper1;

    @Autowired
    UserMapper2 userMapper2;
    @Test
    void contextLoads() {
        System.out.println("userMapper1.getAllUsers() = " + userMapper1.getAllUsers());
        System.out.println("userMapper2.getAllUsers() = " + userMapper2.getAllUsers());
    }

}

结果：