springboot配置多数据源

最近在做一个换电站的项目需要用到多数据源，配置方法如下

一：在yml文件里先把数据源信息配置好

spring:
  application:
    name: base-server
  datasource:
    type: com.alibaba.druid.pool.DruidDataSource
    common:
      username: user
      password: pwd
      jdbc-url: jdbc:mysql://127.0.0.1:3306/database_name?useUnicode=true&useSSL=false&characterEncoding=utf-8&allowMultiQueries=true&serverTimezone=Asia/Shanghai
      driver-class-name: com.mysql.jdbc.Driver
    manager:
      username: user
      password: pwd
      jdbc-url: jdbc:mysql://127.0.0.1:3306/database_name?useUnicode=true&useSSL=false&characterEncoding=utf-8&allowMultiQueries=true&serverTimezone=Asia/Shanghai
      driver-class-name: com.mysql.jdbc.Driver

二：配置默认的数据源如下图所示（在bean上加@Primary注解）：

package com.polaris_base.config.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.slf4j.Logger;
import org.slf4j.LoggerFactory;
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 javax.sql.DataSource;

/**
 * @ClassName DataBase1Config
 * @Description polaris_manager数据库配置
 * @Author 名一
 * @Date 2020/9/24 0024 14:20
 * @Version 1.0
 */
@Configuration
@MapperScan(basePackages = "com.polaris_base.mapper.manager", sqlSessionFactoryRef = "managerSqlSessionFactory")
public class DataSourceConfigByManager {
    private Logger logger = LoggerFactory.getLogger(DataSourceConfigByManager.class);
    // 将这个对象放入Spring容器中
    @Bean(name = "managerDataSource")
    // 表示这个数据源是默认数据源
    @Primary
    // 读取application.properties中的配置参数映射成为一个对象
    // prefix表示参数的前缀
    @ConfigurationProperties(prefix = "spring.datasource.manager")
    public DataSource getDateSourceManager(){
        DataSource dataSource = DataSourceBuilder.create().build();
        logger.info("================================================");
        logger.info("DataSourceConfigByManager.dataSource:{}", dataSource);
        logger.info("================================================");
        return dataSource;
    }

    @Bean(name = "managerSqlSessionFactory")
    // 表示这个数据源是默认数据源
    @Primary
    // @Qualifier表示查找Spring容器中名字为test1DataSource的对象
    public SqlSessionFactory managerSqlSessionFactory(@Qualifier("managerDataSource") DataSource datasource) throws Exception{
        SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
        bean.setDataSource(datasource);
        bean.setMapperLocations(
                // 设置mybatis的xml所在位置
                new PathMatchingResourcePatternResolver().getResources("classpath*:mapper/manager/*.xml"));
        return bean.getObject();
    }

    @Bean("managerSqlSessionTemplate")
    // 表示这个数据源是默认数据源
    @Primary
    public SqlSessionTemplate managerSqlSessionTemplate(@Qualifier("managerSqlSessionFactory") SqlSessionFactory sessionFactory) {
        return new SqlSessionTemplate(sessionFactory);
    }

}

 

 

三：配置第二个数据源，如需配置更多可按照此实例继续扩展该，实例只展示两个。

package com.polaris_base.config.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.slf4j.Logger;
import org.slf4j.LoggerFactory;
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.core.io.support.PathMatchingResourcePatternResolver;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;
import org.springframework.transaction.PlatformTransactionManager;

import javax.sql.DataSource;
import java.io.IOException;

/**
 * @ClassName DataBase2Config
 * @Description polaris_currency数据库配置
 * @Author 名一
 * @Date 2021/3/16 0024 14:21
 * @Version 1.0
 */
@Configuration
@MapperScan(basePackages = "com.polaris_base.mapper.common", sqlSessionFactoryRef = "commonSqlSessionFactory")
public class DataSourceConfigByCommon {
    private Logger logger = LoggerFactory.getLogger(DataSourceConfigByCommon.class);
    @Bean(name = "commonDataSource")
    @ConfigurationProperties(prefix = "spring.datasource.common")
    public DataSource getCurrencyDataSource(){
        DataSource dataSource = DataSourceBuilder.create().build();
        logger.info("================================================");
        logger.info("DataSourceConfigByCommon.dataSource:{}",dataSource);
        logger.info("================================================");
        return dataSource;
    }
    @Bean(name = "commonSqlSessionFactory")
    public SqlSessionFactory currencySqlSessionFactory(@Qualifier("commonDataSource") DataSource datasource) throws Exception {
        SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
        bean.setDataSource(datasource);
        bean.setMapperLocations(new PathMatchingResourcePatternResolver().getResources("classpath*:mapper/common/*.xml"));
        return bean.getObject();
    }
    @Bean("commonSqlSessionTemplate")
    public SqlSessionTemplate currencySqlSessionTemplate(
            @Qualifier("commonSqlSessionFactory") SqlSessionFactory sessionFactory) {
        return new SqlSessionTemplate(sessionFactory);
    }
    @Bean(name = "commonTransactionManager")
    public PlatformTransactionManager testTransactionManager(@Qualifier("commonDataSource") DataSource dataSource) {
        DataSourceTransactionManager dataSourceTransactionManager = new DataSourceTransactionManager(dataSource);
        return dataSourceTransactionManager;
    }
}

 

 

到此多数据源就配置完了，需要注意的是配置完多数据源之后每个数据源的mapper文件和xml需要相互隔离开来。有兴趣的小伙伴赶紧试试吧。。。