Springboot+mybatis-plus配置多数据源（连接多个数据库）

先来整体看一下我的项目结构：

现在开始说多数据源配置：

1、配置yml

上图需要注意的是连接用jdbc-url，要不然会报错：

2、配置数据源的config

这里说一下bean.setTypeEnumsPackage(“com.cn.slt.exchange.enums”)这句话，如果这行代码注释了，但是在你的yml里面配置了： 如上图：这种方法是不生效了，测试一下，查询一个带有枚举类型的实体类，会报错： 这里一定要注意！！！！

3、启动类要配置扫描包，就是初始化spring的时候能找到你的DataSourceNewsConfig和DataSourceOldConfig文件并且初始化

下面附上我的两个配置文件代码：

package com.cn.slt.exchange.config; import com.baomidou.mybatisplus.extension.spring.MybatisSqlSessionFactoryBean; 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 javax.sql.DataSource; @Configuration @MapperScan(basePackages = "com.cn.slt.exchange.dao.old",sqlSessionTemplateRef = "oldSqlSessionTemplate") public class DataSourceOldConfig { @Bean(name = "oldDataSource") @ConfigurationProperties(prefix = "spring.datasource.old") @Primary public DataSource testDataSource() { System.out.println("初始化老的数据源"); return DataSourceBuilder.create().build(); } @Bean(name = "oldSqlSessionFactory") @Primary public SqlSessionFactory oldSqlSessionFactory(@Qualifier("oldDataSource") DataSource dataSource) throws Exception { //SqlSessionFactoryBean bean = new SqlSessionFactoryBean(); MybatisSqlSessionFactoryBean bean = new MybatisSqlSessionFactoryBean(); bean.setDataSource(dataSource); bean.setTypeEnumsPackage("com.cn.slt.exchange.enums"); bean.setMapperLocations(new PathMatchingResourcePatternResolver().getResources("classpath:mapper/old/*.xml")); return bean.getObject(); } @Bean(name = "oldSqlSessionTemplate") @Primary public SqlSessionTemplate testSqlSessionTemplate(@Qualifier("oldSqlSessionFactory") SqlSessionFactory sqlSessionFactory) throws Exception { return new SqlSessionTemplate(sqlSessionFactory); } } package com.cn.slt.exchange.config; import com.baomidou.mybatisplus.extension.spring.MybatisSqlSessionFactoryBean; 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.core.io.support.PathMatchingResourcePatternResolver; import org.springframework.jdbc.datasource.DataSourceTransactionManager; import javax.sql.DataSource; @Configuration @MapperScan(basePackages = "com.cn.slt.exchange.dao.news",sqlSessionTemplateRef = "newsSqlSessionTemplate") public class DataSourceNewsConfig { @Bean(name = "newsDataSource") @ConfigurationProperties(prefix = "spring.datasource.news") public DataSource testDataSource() { System.out.println("初始化新的数据源"); return DataSourceBuilder.create().build(); } @Bean(name = "newsSqlSessionFactory") public SqlSessionFactory testSqlSessionFactory(@Qualifier("newsDataSource") DataSource dataSource) throws Exception { //SqlSessionFactoryBean bean = new SqlSessionFactoryBean(); MybatisSqlSessionFactoryBean bean = new MybatisSqlSessionFactoryBean(); bean.setDataSource(dataSource); bean.setTypeEnumsPackage("com.cn.slt.exchange.enums"); //多数据源配置了后必须在这里设置enums的指向包，在pom里面设置无效 bean.setMapperLocations(new PathMatchingResourcePatternResolver().getResources("classpath:mapper/news/*.xml")); return bean.getObject(); } @Bean(name = "newsTransactionManager") public DataSourceTransactionManager testTransactionManager(@Qualifier("newsDataSource") DataSource dataSource) { return new DataSourceTransactionManager(dataSource); } @Bean(name = "newsSqlSessionTemplate") public SqlSessionTemplate testSqlSessionTemplate(@Qualifier("newsSqlSessionFactory") SqlSessionFactory sqlSessionFactory) throws Exception { return new SqlSessionTemplate(sqlSessionFactory); } }

END！！！