springboot多数据源配置

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