基于springboot和mybatis的多数据源配置
基于springboot和mybatis的多数据源配置
1、首先新建一个springboot项目，项目结构如下：
引入mybatis和mysql依赖：
>
>org.mybatis.spring.boot >
>mybatis-spring-boot-starter >
>2.1.3 >
>
>
>mysql >
>mysql-connector-java >
>runtime >
>
2、建立两个数据源的测试数据库及表，这里为了更好的验证，选择本地数据库为第一个数据源，服务器远端数据库作为第二个数据源
数据源1的数据在上图可查看到，数据源2的表数据如下：
3、使用自动生成工具分别生成两个数据源的mapper接口、xml文件、pojo，并放进不同的地方如下：
4、在yml配置文件中添加数据源信息
首先新建一个配置文件application-local.yml，添加数据库信息(之所以独立出来，考虑主配置文件会掺杂很多其他配置)
datasource:
data1: #数据源1
host: localhost
username: root
password: 123456
data2: #数据源2
host: ***
username: ***
password: ***
主配置文件application.yml里信息如下：
spring:
profiles:
active: local #引入application-local.yml
#多数据源配置
datasource1:
url: jdbc:mysql://${datasource.data1.host}/test?useUnicode=true&characterEncoding=UTF-8&serverTimezone=GMT%2B8
username: ${datasource.data1.username}
password: ${datasource.data1.password}
datasource2:
url: jdbc:mysql://${datasource.data2.host}/test?useUnicode=true&characterEncoding=UTF-8&serverTimezone=GMT%2B8
username: ${datasource.data2.username}
password: ${datasource.data2.password}
5、编写数据源配置类
package com.example.mydemo.config;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.boot.autoconfigure.jdbc.DataSourceProperties;
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;
/**
* @author: ChenGang
* @create: 2020-06-23 19:23
* @description 数据源配置类
**/
@Configuration
public class DataSourceConfig {
/*********************************** 数据源1属性读取 **********************************/
//数据源1配置文件读取
@Primary
@Bean(name = "dataSourceProperties1")
@ConfigurationProperties(prefix = "spring.datasource1")
public DataSourceProperties dataSourceProperties1(){
return new DataSourceProperties();
}
//配置数据源1
@Primary
@Bean(name = "dataSource1")
public DataSource dataSource1(@Qualifier("dataSourceProperties1") DataSourceProperties dataSourceProperties){
return dataSourceProperties.initializeDataSourceBuilder().build();
}
/*********************************** 数据源2属性读取 **********************************/
//数据源2配置文件读取
@Bean(name = "dataSourceProperties2")
@ConfigurationProperties(prefix = "spring.datasource2")
public DataSourceProperties dataSourceProperties2(){
return new DataSourceProperties();
}
//配置数据源2
@Bean(name = "dataSource2")
public DataSource dataSource2(@Qualifier("dataSourceProperties2") DataSourceProperties dataSourceProperties){
return dataSourceProperties.initializeDataSourceBuilder().build();
}
}
6、编写mybatis配置类
*数据源1的mybatis配置====>*
package com.example.mydemo.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.Qualifier;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
import javax.sql.DataSource;
/**
* @author: ChenGang
* @create: 2020-06-23 19:37
* @description 数据源1的mybatis配置类
**/
@Configuration
@MapperScan(basePackages = "com.example.mydemo.mapper.data1",sqlSessionTemplateRef = "sqlSessionTemplate1")
public class MybatisConfig1 {
//配置sqlSession工厂
@Primary
@Bean(name = "sqlSessionFactory1")
public SqlSessionFactory mainSqlSessionFactory1(@Qualifier("dataSource1") DataSource dataSource) throws Exception {
SqlSessionFactoryBean sqlSessionFactory = new SqlSessionFactoryBean();
//设置数据源
sqlSessionFactory.setDataSource(dataSource);
//设置mapper映射文件
sqlSessionFactory.setMapperLocations(new PathMatchingResourcePatternResolver().
getResources("classpath:mapper/data1/*.xml"));
return sqlSessionFactory.getObject();
}
//配置sqlSession模板引擎
@Primary
@Bean(name = "sqlSessionTemplate1")
public SqlSessionTemplate sqlSessionTemplate1(@Qualifier("sqlSessionFactory1") SqlSessionFactory sqlSessionFactory) {
return new SqlSessionTemplate(sqlSessionFactory);
}
}
*数据源2的mybatis配置====>*
package com.example.mydemo.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.Qualifier;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
import javax.sql.DataSource;
/**
* @author: ChenGang
* @create: 2020-06-23 19:37
* @description 数据源1的mybatis配置类
**/
@Configuration
@MapperScan(basePackages = "com.example.mydemo.mapper.data2",sqlSessionTemplateRef = "sqlSessionTemplate2")
public class MybatisConfig2 {
//配置sqlSession工厂
@Primary
@Bean(name = "sqlSessionFactory2")
public SqlSessionFactory mainSqlSessionFactory2(@Qualifier("dataSource2") DataSource dataSource) throws Exception {
SqlSessionFactoryBean sqlSessionFactory = new SqlSessionFactoryBean();
//设置数据源
sqlSessionFactory.setDataSource(dataSource);
//设置mapper映射文件
sqlSessionFactory.setMapperLocations(new PathMatchingResourcePatternResolver().
getResources("classpath:mapper/data2/*.xml"));
return sqlSessionFactory.getObject();
}
//配置sqlSession模板引擎
@Primary
@Bean(name = "sqlSessionTemplate2")
public SqlSessionTemplate sqlSessionTemplate2(@Qualifier("sqlSessionFactory2") SqlSessionFactory sqlSessionFactory) {
return new SqlSessionTemplate(sqlSessionFactory);
}
}
7、数据库连接池配置类
package com.example.mydemo.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;
/**
* @author: ChenGang
* @create: 2020/6/23:20:58
* @description: 数据库连接池配置
**/
@Configuration
public class JdbcTemplateDataSourceConfig {
//JdbcTemplate主数据源ds1数据源
@Bean(name = "jdbcTemplate1")
public JdbcTemplate jdbcTemplate1(@Qualifier("dataSource1") DataSource dataSource) {
return new JdbcTemplate(dataSource);
}
//JdbcTemplate第二个ds2数据源
@Bean(name = "jdbcTemplate2")
public JdbcTemplate jdbcTemplate2(@Qualifier("dataSource2") DataSource dataSource) {
return new JdbcTemplate(dataSource);
}
}
8、编写测试类，分别查询两张表数据
package com.example.mydemo;
import com.example.mydemo.mapper.data1.Test1Mapper;
import com.example.mydemo.mapper.data2.Test2Mapper;
import com.example.mydemo.pojo.data1.Test1;
import com.example.mydemo.pojo.data2.Test2;
import org.junit.jupiter.api.Test;
import org.springframework.boot.test.context.SpringBootTest;
import javax.annotation.Resource;
import java.util.List;
@SpringBootTest
class MydemoApplicationTests {
@Resource
Test1Mapper test1Mapper;
@Resource
Test2Mapper test2Mapper;
@Test
void contextLoads() {
Test1 test1 = test1Mapper.selectByPrimaryKey(1);
System.out.println("数据源1的数据："+test1);
List<Test2> test2s = test2Mapper.findAll();
System.out.println("数据源2的数据："+test2s.get(0));
}
}
打印结果如下：
可以看见，当使用test1Mapper做查询时链接数据源1，获取的数据源1的数据；当使用test2Mapper做查询时链接数据源2，获取的数据源2的数据，多数据源的配置就成功啦！
如有不对，请留言指正！下期请见多数据源的事务配置。