請耐心看完

注意：本示例用的是springboot2.0

你們在專案中有使用到多資料來源嗎？

原理使用根據包名，載入不同的資料來源，也可以根據註解載入不同的資料來源

直接奔向主題，請繫好安全帶！！！

配置兩個不同的資料來源

#datasource1
spring.datasource.test1.driver-class-name = com.mysql.jdbc.Driver
spring.datasource.test1.jdbc-url = jdbc:mysql://localhost:3306/test01?useUnicode=true&characterEncoding=utf-8
spring.datasource.test1.username = root
spring.datasource.test1.password = root

#datasource2
spring.datasource.test2.driver-class-name = com.mysql.jdbc.Driver
spring.datasource.test2.jdbc-url = jdbc:mysql://localhost:3306/test02?useUnicode=true&characterEncoding=utf-8
spring.datasource.test2.username = root
spring.datasource.test2.password = root
 

彆著急，先看一下專案結構

可以看到定義了兩個mapper包，放不同的業務

配置類分別載入兩個資料來源，這裡都是寫死的，可以直接copy來用噢

package cn.ly.dataSource;

import javax.sql.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.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.jdbc.datasource.DataSourceTransactionManager;

//配置01資料來源

//這是一個配置檔案
@Configuration
//指定cn.ly.service1包用test1資料來源，test1SqlSessionFactory下面有配置
@MapperScan(basePackages = "cn.ly.mapper1", sqlSessionFactoryRef = "test1SqlSessionFactory")
public class DataSource1Config {
	
	/**
	 * 
	 * @methodDesc: 功能描述:(配置test1資料庫)
	 * @author: Ly
	 */
	@Bean(name = "test1DataSource")
	@ConfigurationProperties(prefix = "spring.datasource.test1")
	@Primary
	public DataSource testDataSource() {
		return DataSourceBuilder.create().build();
	}

	/**
	 * 
	 * @methodDesc: 功能描述:(test1 sql會話工廠)
	 * @author: Ly
	 */
	@Bean(name = "test1SqlSessionFactory")
	@Primary
	public SqlSessionFactory testSqlSessionFactory(@Qualifier("test1DataSource") DataSource dataSource)
			throws Exception {
		SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
		bean.setDataSource(dataSource);
		//這裡可以指定掃描mapper檔案
		// bean.setMapperLocations(
		// new
		// PathMatchingResourcePatternResolver().getResources("classpath:mybatis/mapper/test1/*.xml"));
		return bean.getObject();
	}

	/**
	 * 
	 * @methodDesc: 功能描述:(test1 事物管理)
	 * @author: Ly
	 */
	@Bean(name = "test1TransactionManager")
	@Primary
	public DataSourceTransactionManager testTransactionManager(@Qualifier("test1DataSource") DataSource dataSource) {
		return new DataSourceTransactionManager(dataSource);
	}

	@Bean(name = "test1SqlSessionTemplate")
	@Primary
	public SqlSessionTemplate testSqlSessionTemplate(
			@Qualifier("test1SqlSessionFactory") SqlSessionFactory sqlSessionFactory) throws Exception {
		return new SqlSessionTemplate(sqlSessionFactory);
	}

}
 

package cn.ly.dataSource;

import javax.sql.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.context.properties.ConfigurationProperties;
import org.springframework.boot.jdbc.DataSourceBuilder;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;

//配置e02資料來源

//這是一個配置檔案
@Configuration
//指定cn.ly.service1包用test2資料來源，test2SqlSessionFactory下面有配置
@MapperScan(basePackages = "cn.ly.mapper2", sqlSessionFactoryRef = "test2SqlSessionFactory")
public class DataSource2Config {

	/**
	 * 
	 * @methodDesc: 功能描述:(配置test2資料庫)
	 * @author: Ly
	 */
	@Bean(name = "test2DataSource")
	@ConfigurationProperties(prefix = "spring.datasource.test2")
	public DataSource testDataSource() {
		return DataSourceBuilder.create().build();
	}

	/**
	 * 
	 * @methodDesc: 功能描述:(test2 sql會話工廠)
	 * @author: Ly
	 */
	@Bean(name = "test2SqlSessionFactory")
	public SqlSessionFactory testSqlSessionFactory(@Qualifier("test2DataSource") DataSource dataSource)
			throws Exception {
		SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
		bean.setDataSource(dataSource);
		//這裡可以指定掃描mapper檔案
		// bean.setMapperLocations(
		// new
		// PathMatchingResourcePatternResolver().getResources("classpath:mybatis/mapper/test2/*.xml"));
		return bean.getObject();
	}

	/**
	 * 
	 * @methodDesc: 功能描述:(test2 事物管理)
	 * @author: Ly
	 */
	@Bean(name = "test2TransactionManager")
	public DataSourceTransactionManager testTransactionManager(@Qualifier("test2DataSource") DataSource dataSource) {
		return new DataSourceTransactionManager(dataSource);
	}

	@Bean(name = "test2SqlSessionTemplate")
	public SqlSessionTemplate testSqlSessionTemplate(
			@Qualifier("test2SqlSessionFactory") SqlSessionFactory sqlSessionFactory) throws Exception {
		return new SqlSessionTemplate(sqlSessionFactory);
	}

}
 

看清除噢，這裡主要說明了哪個mapper包用哪個資料來源

Mapper層

Service層

分別呼叫不懂的mapper

Controller層

ok完事，看懂的麻煩點個贊