springboot + mybatis 多数据源

 

1.application.yml中添加多个数据源配置,(ds1,ds2自定义名称)

spring:
  datasource:
    ds1:
      jdbc-url: jdbc:mysql://localhost:3306/stu?useUnicode=true&characterEncoding=utf-8&serverTimezone=Asia/Shanghai
      username: root
      password: root
      driver-class-name: com.mysql.cj.jdbc.Driver
    ds2:
      jdbc-url: jdbc:oracle:thin:@localhost:1521:orcl
      username: sa
      password: sa
      driver-class-name: oracle.jdbc.driver.OracleDriver

2.创建两个数据源的配置类(注意,代码中的@Primary只能存在一个数据源中,表示主数据源)

数据源一配置

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.core.io.support.PathMatchingResourcePatternResolver;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;

@Configuration
//这里扫描dao文件的位置
@MapperScan(basePackages = "com.hn.demo.ds1", sqlSessionTemplateRef  = "ds1SqlSessionTemplate")
public class DataSource1Config {

    @Bean(name = "ds1DataSource")
    @ConfigurationProperties(prefix = "spring.datasource.ds1")
    @Primary
    public DataSource ds1DataSource() {
        return DataSourceBuilder.create().build();
    }

    @Bean(name = "ds1SqlSessionFactory")
    @Primary
    public SqlSessionFactory ds1SqlSessionFactory(@Qualifier("ds1DataSource") DataSource dataSource) throws Exception {
        SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
        bean.setDataSource(dataSource);
        //这个可选,项目里没有就不用加
        //bean.setConfigLocation(new PathMatchingResourcePatternResolver().getResource("classpath:mybatis/mybatis-config.xml"));
        //这里扫描xml文件位置
        bean.setMapperLocations(new PathMatchingResourcePatternResolver().getResources("classpath:mybatis/ds1/*.xml"));
        return bean.getObject();
    }

    @Bean(name = "ds1TransactionManager")
    @Primary
    public DataSourceTransactionManager ds1TransactionManager(@Qualifier("ds1DataSource") DataSource dataSource) {
        return new DataSourceTransactionManager(dataSource);
    }

    @Bean(name = "ds1SqlSessionTemplate")
    @Primary
    public SqlSessionTemplate ds1SqlSessionTemplate(@Qualifier("ds1SqlSessionFactory") SqlSessionFactory sqlSessionFactory) throws Exception {
        return new SqlSessionTemplate(sqlSessionFactory);
    }
}

数据源二配置

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.core.io.support.PathMatchingResourcePatternResolver;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;

@Configuration
//这里扫描dao文件的位置
@MapperScan(basePackages = "com.hn.demo.ds2", sqlSessionTemplateRef  = "ds2SqlSessionTemplate")
public class DataSource1Config {

    @Bean(name = "ds2DataSource")
    @ConfigurationProperties(prefix = "spring.datasource.ds2")
    public DataSource ds2DataSource() {
        return DataSourceBuilder.create().build();
    }

    @Bean(name = "ds2SqlSessionFactory")
    public SqlSessionFactory ds2SqlSessionFactory(@Qualifier("ds2DataSource") DataSource dataSource) throws Exception {
        SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
        bean.setDataSource(dataSource);
        //这个可选,项目里没有就不用加
        //bean.setConfigLocation(new PathMatchingResourcePatternResolver().getResource("classpath:mybatis/mybatis-config.xml"));
        //这里扫描xml文件位置
        bean.setMapperLocations(new PathMatchingResourcePatternResolver().getResources("classpath:mybatis/ds2/*.xml"));
        return bean.getObject();
    }

    @Bean(name = "ds2TransactionManager")
    public DataSourceTransactionManager ds2TransactionManager(@Qualifier("ds2DataSource") DataSource dataSource) {
        return new DataSourceTransactionManager(dataSource);
    }

    @Bean(name = "ds2SqlSessionTemplate")
    public SqlSessionTemplate ds2SqlSessionTemplate(@Qualifier("ds2SqlSessionFactory") SqlSessionFactory sqlSessionFactory) throws Exception {
        return new SqlSessionTemplate(sqlSessionFactory);
    }
}