Sprint boot+Mybatis配置多數據源

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t1爲mysql數據源，t2爲sqlserver數據源

通過配置，使com.example.demo.mapper.mysql下MYSQL的Mapper與classpath:mapper/mysql/.xml形成映射。

com.example.demo.mapper.mssql下MSSQL的Mapper與classpath:mapper/mssql/.xml形成映射。

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1. 配置文件a’p’plication.properties
   spring.datasource.t1.jdbc-url=jdbc:mysql://127.0.0.1:3306/test?serverTimezone=UTC
   spring.datasource.t1.username=root
   spring.datasource.t1.password=xxxxx
   spring.datasource.t1.driver-class-name=com.mysql.cj.jdbc.Driver

   spring.datasource.t2.jdbc-url=jdbc:sqlserver://127.0.0.1:1433;Database=msssqltest
   spring.datasource.t2.username=sa
   spring.datasource.t2.password=xxxxx
   spring.datasource.t2.driver-class-name=com.microsoft.sqlserver.jdbc.SQLServerDriver
   

2. 配置Class
   @Configuration
   @MapperScan(basePackages = “com.example.demo.mapper.mysql”,sqlSessionFactoryRef = “s1SqlSessionFactory”) //關聯com.example.demo.mapper.mysql的Mapper
   public class Source1Config {

       /**
        * spring.datasource.t1的配置映射成DataSource source1
        * @return
        */
       @Bean(name = "source1")
       @ConfigurationProperties(prefix="spring.datasource.t1")
       public DataSource primaryDataSource() {
           return DataSourceBuilder.create().build();
       }
   
       /**
        * 使用source1 處理classpath*:mapper/mysql/*.xml
        * @param dataSource
        * @return
        * @throws Exception
        */
       @Bean(name = "s1SqlSessionFactory")
       public SqlSessionFactory sqlSessionFactory(@Qualifier("source1") DataSource dataSource) throws Exception {
           SqlSessionFactoryBean sessionFactoryBean = new SqlSessionFactoryBean();
           sessionFactoryBean.setDataSource(dataSource);
           sessionFactoryBean.setMapperLocations(new PathMatchingResourcePatternResolver()
                   .getResources("classpath*:mapper/mysql/*.xml"));
           return sessionFactoryBean.getObject();
       }
   }
   @Configuration
   @MapperScan(basePackages = "com.example.demo.mapper.mssql",sqlSessionFactoryRef = "s2SqlSessionFactory")
   public class Source2Config {
       @Bean(name = "source2")
       @ConfigurationProperties(prefix="spring.datasource.t2")
       public DataSource primaryDataSource() {
           return DataSourceBuilder.create().build();
       }
   
       @Bean(name = "s2SqlSessionFactory")
       public SqlSessionFactory sqlSessionFactory(@Qualifier("source2") DataSource dataSource) throws Exception {
           SqlSessionFactoryBean sessionFactoryBean = new SqlSessionFactoryBean();
           sessionFactoryBean.setDataSource(dataSource);
           sessionFactoryBean.setMapperLocations(new PathMatchingResourcePatternResolver()
                   .getResources("classpath*:mapper/mssql/*.xml"));
           return sessionFactoryBean.getObject();
       }
   }