springboot2.X 多数据源搭建

1.application.properties 配置

# test1库的配置
spring.datasource.hikari.test1.jdbc-url=
spring.datasource.hikari.test1.username=
spring.datasource.hikari.test1.password=
spring.datasource.hikari.test1.driver-class-name=com.mysql.cj.jdbc.Driver
#test2库的配置
spring.datasource.hikari.test2.jdbc-url=
spring.datasource.hikari.test2.username=root
spring.datasource.hikari.test2.password=
spring.datasource.hikari.test2.driver-class-name=com.mysql.cj.jdbc.Driver

这里用到hikari 百度搜索2.0 要用hikari，不然回报jdbc-url的错误

2. 创建dataSource 目录，在下面分别创建 dataSource1  dataSource2俩个文件

dataSource1

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.context.properties.ConfigurationProperties;
import org.springframework.boot.jdbc.DataSourceBuilder;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;
import org.springframework.core.io.Resource;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;

import javax.sql.DataSource;

@Configuration//注解到spring容器中
@MapperScan(basePackages = "com.deci.push_interface.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.hikari.test1")
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);
bean.setMapperLocations(new PathMatchingResourcePatternResolver().getResources("classpath*:com/deci/push_interface/data1/mapper/*.xml"));
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

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.context.properties.ConfigurationProperties;
import org.springframework.boot.jdbc.DataSourceBuilder;
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 org.springframework.jdbc.datasource.DataSourceTransactionManager;

import javax.sql.DataSource;

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

/**
* 返回data2数据库的数据源
* @return
*/
@Bean(name="data2Source")
@Primary//主数据源
@ConfigurationProperties(prefix = "spring.datasource.hikari.test2")
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")
@Primary
public SqlSessionFactory sqlSessionFactory(@Qualifier("data2Source") DataSource ds) throws Exception{
SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
bean.setDataSource(ds);
bean.setMapperLocations(new PathMatchingResourcePatternResolver().getResources("classpath*:com/deci/push_interface/data2/mapper/*.xml"));
return bean.getObject();
}

/**
* 返回data2数据库的会话模板
* @param sessionFactory
* @return
* @throws Exception
*/
@Bean(name = "data2SqlSessionTemplate")
@Primary
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")
@Primary
public DataSourceTransactionManager transactionManager(@Qualifier("data2Source") DataSource ds){
return new DataSourceTransactionManager(ds);
}
}

3.入口加注解

@EnableAutoConfiguration(exclude = { DataSourceAutoConfiguration.class, DataSourceTransactionManagerAutoConfiguration.class })

接下来就是dao mapper.xml文件的编写 这里就不多说了

然后就是接口的调用，多数据源已经完成了，主要是application.properties 文件 和datasource1,dataSource2配置文件的编写