springboot多数据源配置

摘要：一定义两个数据源和生成数据源注解声明为默认数据源创建配置事务管理二注意不同的数据源的类一定不能放在一个包下否则只扫描一个数据源即只会使用一个数据源里一个不会加载三配置文件使用数据源使用数据源四修改对应位置的代码使用时可自动切换数据源

一.定义两个数据源DataSource1Config 和DataSource2Config

package com.rainbow.test.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.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
@MapperScan(basePackages = "com.rainbow.test.mapper.test1", sqlSessionTemplateRef = "db1SqlSessionTemplate")
public class DataSource1Config {

    /**
     * 生成数据源.  @Primary 注解声明为默认数据源
     */
    @Bean(name = "db1DataSource")
    @ConfigurationProperties(prefix = "spring.datasource.test")

    public DataSource testDataSource() {
        return DataSourceBuilder.create().build();
    }

    /**
     * 创建 SqlSessionFactory
     */
    @Bean(name = "db1SqlSessionFactory")
    public SqlSessionFactory testSqlSessionFactory(@Qualifier("db1DataSource") DataSource dataSource) throws Exception {
        SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
        bean.setDataSource(dataSource);
        bean.setMapperLocations(new PathMatchingResourcePatternResolver().getResources("classpath:com/rainbow/test/mapper/test1/*.xml"));

        //  bean.setMapperLocations(new PathMatchingResourcePatternResolver().getResources("classpath:mybatis/mapper/db1/*.xml"));
        return bean.getObject();
    }

    /**
     * 配置事务管理
     */
    @Bean(name = "db1TransactionManager")
    public DataSourceTransactionManager testTransactionManager(@Qualifier("db1DataSource") DataSource dataSource) {
        return new DataSourceTransactionManager(dataSource);
    }

    @Bean(name = "db1SqlSessionTemplate")
    public SqlSessionTemplate testSqlSessionTemplate(@Qualifier("db1SqlSessionFactory") SqlSessionFactory sqlSessionFactory) throws Exception {
        return new SqlSessionTemplate(sqlSessionFactory);
    }

}

package com.rainbow.test.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.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
@MapperScan(basePackages = "com.rainbow.test.mapper.test2", sqlSessionTemplateRef = "db2SqlSessionTemplate")
public class DataSource2Config {

    @Bean(name = "db2DataSource")
    @ConfigurationProperties(prefix = "spring.datasource.test1")
    @Primary
    public DataSource testDataSource() {
        return DataSourceBuilder.create().build();
    }

    @Bean(name = "db2SqlSessionFactory")
    @Primary
    public SqlSessionFactory testSqlSessionFactory(@Qualifier("db2DataSource") DataSource dataSource) throws Exception {
        SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
        bean.setDataSource(dataSource);
        bean.setMapperLocations(new PathMatchingResourcePatternResolver().getResources("classpath:com/rainbow/test/mapper/test2/*.xml"));
        return bean.getObject();
    }

    @Bean(name = "db2TransactionManager")
    @Primary
    public DataSourceTransactionManager testTransactionManager(@Qualifier("db2DataSource") DataSource dataSource) {
        return new DataSourceTransactionManager(dataSource);
    }

    @Bean(name = "db2SqlSessionTemplate")
    @Primary
    public SqlSessionTemplate testSqlSessionTemplate(@Qualifier("db2SqlSessionFactory") SqlSessionFactory sqlSessionFactory) throws Exception {
        return new SqlSessionTemplate(sqlSessionFactory);
    }

}

二.注意不同的数据源的mapper类一定不能放在一个包下,否则@mapperscan只扫描一个数据源,即只会使用一个数据源,里一个不会加载

三.配置yml文件

spring:
  datasource:
    test:
      # 使用druid数据源
      type: com.alibaba.druid.pool.DruidDataSource
      jdbc-url: jdbc:mysql://localhost:3306/test?serverTimezone=CTT&useUnicode=true&characterEncoding=utf-8&allowMultiQueries=true
      username: root
      password: root
      driver-class-name: com.mysql.jdbc.Driver

    test1:
      # 使用druid数据源
      type: com.alibaba.druid.pool.DruidDataSource
      jdbc-url: jdbc:oracle:thin:@172.16.182.18:1521:orcl
      username: policyprint
      password: sinosoft
      driver-class-name: oracle.jdbc.OracleDriver

四.修改对应位置的代码,使用时可自动切换数据源