SpringBoot多数据源配置详细教程(JdbcTemplate、mybatis)

多数据源 配置

首先是配置文件

这里采用yml配置文件，其他类型配置文件同理 我配置了两个数据源，一个名字叫ds1数据源，一个名字叫ds2数据源,如果你想配置更多的数据源，继续加就行了 spring : # 数据源配置 datasource : ds1 : #数据源1 driver - class - name : com . mysql . jdbc . Driver # mysql的驱动你可以配置别的关系型数据库 url : jdbc : mysql : //ip:3306/db1 #数据源地址 username : root # 用户名 password : root # 密码 ds2 : # 数据源2 driver - class - name : com . mysql . jdbc . Driver # mysql的驱动你可以配置别的关系型数据库 url : jdbc : mysql : //ip:3307/db2#数据源地址 username : root # 用户名 password : root # 密码

多数据源配置

增加一个Springboot的配置类

/** * 多数据源配置 */ @Configuration public class DataSourceConfig {   //主数据源配置 ds1数据源 @Primary @Bean ( name = "ds1DataSourceProperties" ) @ConfigurationProperties ( prefix = "spring.datasource.ds1" ) public DataSourceProperties ds1DataSourceProperties () { return new DataSourceProperties (); }   //主数据源 ds1数据源 @Primary @Bean ( name = "ds1DataSource" ) public DataSource ds1DataSource ( @Qualifier ( "ds1DataSourceProperties" ) DataSourceProperties dataSourceProperties ) { return dataSourceProperties . initializeDataSourceBuilder (). build (); }   //第二个ds2数据源配置 @Bean ( name = "ds2DataSourceProperties" ) @ConfigurationProperties ( prefix = "spring.datasource.ds2" ) public DataSourceProperties ds2DataSourceProperties () { return new DataSourceProperties (); }   //第二个ds2数据源 @Bean ( "ds2DataSource" ) public DataSource ds2DataSource ( @Qualifier ( "ds2DataSourceProperties" ) DataSourceProperties dataSourceProperties ) { return dataSourceProperties . initializeDataSourceBuilder (). build (); } }

JdbcTemplate多数据源配置

增加一个Springboot配置类

/** * JdbcTemplate多数据源配置 * 依赖于数据源配置 * * @see DataSourceConfig */ @Configuration public class JdbcTemplateDataSourceConfig {   //JdbcTemplate主数据源ds1数据源 @Primary @Bean ( name = "ds1JdbcTemplate" ) public JdbcTemplate ds1JdbcTemplate ( @Qualifier ( "ds1DataSource" ) DataSource dataSource ) { return new JdbcTemplate ( dataSource ); }   //JdbcTemplate第二个ds2数据源 @Bean ( name = "ds2JdbcTemplate" ) public JdbcTemplate ds2JdbcTemplate ( @Qualifier ( "ds2DataSource" ) DataSource dataSource ) { return new JdbcTemplate ( dataSource ); } }

mybatis 多数据源配置

增加一个 SpringBoot 配置类

mybatis多数据源的原理是根据不同包，调用不同的数据源，你只需要把你的mapper.java和mapper.xml(我喜欢叫dao.java和dao.xml)写在某个package中，springboot自动帮你实现数据源切换
核心代码就这句

@MapperScan ( basePackages = "com.web.ds2.**.dao" , sqlSessionTemplateRef = "ds2SqlSessionTemplate" )

用来指定包扫描指定sqlSessionTemplateRef
和 sqlSessionFactory.setMapperLocations(new PathMatchingResourcePatternResolver().getResources("classpath*:com/web/ds2/**/*.xml"));
用来指定mapper.xml的路径

详细配置代码如下

/** * Mybatis主数据源ds1配置 * 多数据源配置依赖数据源配置 * @see DataSourceConfig */ @Configuration @MapperScan ( basePackages = "com.web.ds1.**.dao" , sqlSessionTemplateRef = "ds1SqlSessionTemplate" ) public class MybatisPlusConfig4ds1 {   //主数据源 ds1数据源 @Primary @Bean ( "ds1SqlSessionFactory" ) public SqlSessionFactory ds1SqlSessionFactory ( @Qualifier ( "ds1DataSource" ) DataSource dataSource ) throws Exception { MybatisSqlSessionFactoryBean sqlSessionFactory = new MybatisSqlSessionFactoryBean (); sqlSessionFactory . setDataSource ( dataSource ); sqlSessionFactory . setMapperLocations ( new PathMatchingResourcePatternResolver (). getResources ( "classpath*:com/web/ds1/**/*.xml" )); return sqlSessionFactory . getObject (); }   @Primary @Bean ( name = "ds1TransactionManager" ) public DataSourceTransactionManager ds1TransactionManager ( @Qualifier ( "ds1DataSource" ) DataSource dataSource ) { return new DataSourceTransactionManager ( dataSource ); }   @Primary @Bean ( name = "ds1SqlSessionTemplate" ) public SqlSessionTemplate ds1SqlSessionTemplate ( @Qualifier ( "ds1SqlSessionFactory" ) SqlSessionFactory sqlSessionFactory ) { return new SqlSessionTemplate ( sqlSessionFactory ); } } /** * Mybatis 第二个ds2数据源配置 * 多数据源配置依赖数据源配置 * @see DataSourceConfig */ @Configuration @MapperScan ( basePackages = "com.web.ds2.**.dao" , sqlSessionTemplateRef = "ds2SqlSessionTemplate" ) public class MybatisPlusConfig4ds2 {   //ds2数据源 @Bean ( "ds2SqlSessionFactory" ) public SqlSessionFactory ds2SqlSessionFactory ( @Qualifier ( "ds2DataSource" ) DataSource dataSource ) throws Exception { MybatisSqlSessionFactoryBean sqlSessionFactory = new MybatisSqlSessionFactoryBean (); sqlSessionFactory . setDataSource ( dataSource ); sqlSessionFactory . setMapperLocations ( new PathMatchingResourcePatternResolver (). getResources ( "classpath*:com/web/ds2/**/*.xml" )); return sqlSessionFactory . getObject (); }   //事务支持 @Bean ( name = "ds2TransactionManager" ) public DataSourceTransactionManager ds2TransactionManager ( @Qualifier ( "ds2DataSource" ) DataSource dataSource ) { return new DataSourceTransactionManager ( dataSource ); }   @Bean ( name = "ds2SqlSessionTemplate" ) public SqlSessionTemplate ds2SqlSessionTemplate ( @Qualifier ( "ds2SqlSessionFactory" ) SqlSessionFactory sqlSessionFactory ) { return new SqlSessionTemplate ( sqlSessionFactory ); } }

mybatis-plus 多数据源配置

mybatis-plus是mybatis的增强版，只增加，不影响。也就是说使用mybatis-plus兼容原来所有的mybatis代码和配置。然后又做了很多增加和简化使用，具体看官网教程 https://mybatis.plus/

相对于mybatis的多数据源配置就是改了下 SqlSessionFactory
核心代码就是修改mybatis为mybatis-plus，如下

@Bean ( "ds2SqlSessionFactory" ) public SqlSessionFactory ds2SqlSessionFactory ( @Qualifier ( "ds2DataSource" ) DataSource dataSource ) throws Exception { MybatisSqlSessionFactoryBean sqlSessionFactory = new MybatisSqlSessionFactoryBean (); sqlSessionFactory . setDataSource ( dataSource ); MybatisConfiguration configuration = new MybatisConfiguration (); configuration . setDefaultScriptingLanguage ( MybatisXMLLanguageDriver . class ); configuration . setJdbcTypeForNull ( JdbcType . NULL ); sqlSessionFactory . setConfiguration ( configuration ); sqlSessionFactory . setMapperLocations ( new PathMatchingResourcePatternResolver (). getResources ( "classpath*:com/web/ds2/**/*.xml" )); sqlSessionFactory . setPlugins ( new Interceptor []{ new PaginationInterceptor (), new PerformanceInterceptor () // .setFormat(true), }); sqlSessionFactory . setGlobalConfig ( new GlobalConfig (). setBanner ( false )); return sqlSessionFactory . getObject (); }

全部配置代码如下

/** * Mybatis-plus ds2数据源配置 * 多数据源配置依赖数据源配置 * @see DataSourceConfig */ @Configuration @MapperScan ( basePackages = "com.web.ds2.**.dao" , sqlSessionTemplateRef = "ds2SqlSessionTemplate" ) public class MybatisPlusConfig4ds2 {   //ds2数据源 @Bean ( "ds2SqlSessionFactory" ) public SqlSessionFactory ds2SqlSessionFactory ( @Qualifier ( "ds2DataSource" ) DataSource dataSource ) throws Exception { MybatisSqlSessionFactoryBean sqlSessionFactory = new MybatisSqlSessionFactoryBean (); sqlSessionFactory . setDataSource ( dataSource ); MybatisConfiguration configuration = new MybatisConfiguration (); configuration . setDefaultScriptingLanguage ( MybatisXMLLanguageDriver . class ); configuration . setJdbcTypeForNull ( JdbcType . NULL ); sqlSessionFactory . setConfiguration ( configuration ); sqlSessionFactory . setMapperLocations ( new PathMatchingResourcePatternResolver (). getResources ( "classpath*:com/web/ds2/**/*.xml" )); sqlSessionFactory . setPlugins ( new Interceptor []{ new PaginationInterceptor (), new PerformanceInterceptor () // .setFormat(true), }); sqlSessionFactory . setGlobalConfig ( new GlobalConfig (). setBanner ( false )); return sqlSessionFactory . 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 ) { return new SqlSessionTemplate ( sqlSessionFactory ); } } /** * Mybatis-plus 主数据源ds1配置 * 多数据源配置依赖数据源配置 * @see DataSourceConfig */ @Configuration @MapperScan ( basePackages = "com.web.ds1.**.dao" , sqlSessionTemplateRef = "ds1SqlSessionTemplate" ) public class MybatisPlusConfig4ds1 {   //主数据源 ds1数据源 @Primary @Bean ( "ds1SqlSessionFactory" ) public SqlSessionFactory ds1SqlSessionFactory ( @Qualifier ( "ds1DataSource" ) DataSource dataSource ) throws Exception { MybatisSqlSessionFactoryBean sqlSessionFactory = new MybatisSqlSessionFactoryBean (); sqlSessionFactory . setDataSource ( dataSource ); MybatisConfiguration configuration = new MybatisConfiguration (); configuration . setDefaultScriptingLanguage ( MybatisXMLLanguageDriver . class ); configuration . setJdbcTypeForNull ( JdbcType . NULL ); sqlSessionFactory . setConfiguration ( configuration ); sqlSessionFactory . setMapperLocations ( new PathMatchingResourcePatternResolver (). getResources ( "classpath*:com/ds1/web/ds1/**/*.xml" )); sqlSessionFactory . setPlugins ( new Interceptor []{ new PaginationInterceptor (), new PerformanceInterceptor () // .setFormat(true), }); sqlSessionFactory . setGlobalConfig ( new GlobalConfig (). setBanner ( false )); return sqlSessionFactory . getObject (); }   @Primary @Bean ( name = "ds1TransactionManager" ) public DataSourceTransactionManager ds1TransactionManager ( @Qualifier ( "ds1DataSource" ) DataSource dataSource ) { return new DataSourceTransactionManager ( dataSource ); }   @Primary @Bean ( name = "ds1SqlSessionTemplate" ) public SqlSessionTemplate ds1SqlSessionTemplate ( @Qualifier ( "ds1SqlSessionFactory" ) SqlSessionFactory sqlSessionFactory ) { return new SqlSessionTemplate ( sqlSessionFactory ); } }

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原文链接：https://HdhCmsTestjianshu测试数据/p/dfd5ae340011

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