Spring Boot 整合mybatis 使用多数据源的实现方法

compile('org.mybatis.spring.boot:mybatis-spring-boot-starter:1.3.1')

 spring.datasource.url=jdbc:mysql://localhost/test
 spring.datasource.username=dbuser
 spring.datasource.password=dbpass
 spring.datasource.driver-class-name=com.mysql.jdbc.Driver

first.datasource.url=jdbc:mysql://localhost/first
first.datasource.username=dbuser1
first.datasource.password=dbpass1
first.datasource.driver-class-name=com.mysql.jdbc.Driver
first.datasource.type=com.alibaba.druid.pool.DruidDataSource//我用的是Druid，也可以不加用默认的
second.datasource.url=jdbc:mysql://localhost/second
second.datasource.username=dbuser2
second.datasource.password=dbpass2
second.datasource.driver-class-name=com.mysql.jdbc.Driver
second.datasource.type=com.alibaba.druid.pool.DruidDataSource

@Configuration
@MapperScan(basePackages = {"com.user.server.dao"}, sqlSessionTemplateRef = "userSqlSessionTemplate")
public class UserMybatisConfig {
 @Bean(name = "userDataSource")
 @Primary //必须加此注解，不然报错，下一个类则不需要添加
 @ConfigurationProperties(prefix = "first.datasource") // prefix值必须是application.properteis中对应属性的前缀
 public DataSource userDataSource() {
  return DataSourceBuilder.create().build();
 }
 @Bean
 public SqlSessionFactory userSqlSessionFactory(@Qualifier("userDataSource") DataSource dataSource) throws Exception {
  SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
  bean.setDataSource(dataSource);
  //添加XML目录
  ResourcePatternResolver resolver = new PathMatchingResourcePatternResolver();
 try {
   bean.setMapperLocations(resolver.getResources("classpath*:com/user/server/dao/mapping/*.xml"));
   return bean.getObject();
  } catch (Exception e) {
   e.printStackTrace();
   throw new RuntimeException(e);
  }
 }
 @Bean
 public SqlSessionTemplate userSqlSessionTemplate(@Qualifier("userSqlSessionFactory") SqlSessionFactory sqlSessionFactory) throws Exception {
  SqlSessionTemplate template = new SqlSessionTemplate(sqlSessionFactory); // 使用上面配置的Factory
  return template;
 }
}
@Configuration
@MapperScan(basePackages = {"com.airmi.server.dao"}, sqlSessionTemplateRef = "autoTestSqlSessionTemplate")
 public class AutoTestMybatisConfig {
  @Bean
  @ConfigurationProperties(prefix = "autotest.datasource")
   public DataSource autoTestDataSource() {
   return DataSourceBuilder.create().build();
  }
  @Bean
  public SqlSessionTemplate autoTestSqlSessionTemplate(@Qualifier("autoTestSqlSessionFactory") SqlSessionFactory sqlSessionFactory) throws Exception {
   SqlSessionTemplate template = new SqlSessionTemplate(sqlSessionFactory);
    return template;
   }
  @Bean
  public SqlSessionFactory autoTestSqlSessionFactory(@Qualifier("autoTestDataSource") DataSource dataSource) throws Exception {
   SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
   bean.setDataSource(dataSource);
   //添加XML目录
   ResourcePatternResolver resolver = new PathMatchingResourcePatternResolver();
   try {
    bean.setMapperLocations(resolver.getResources("classpath*:com/airmi/server/dao/mapping/*.xml"));
    return bean.getObject();
   } catch (Exception e) {
    e.printStackTrace();
    throw new RuntimeException(e);
   }
  }
 }

 @MapperScan (basePackages = {"com.user.server.dao"}, sqlSessionTemplateRef = "userSqlSessionTemplate") basePackages为mapper所在的包，sqlSessionTemplateRef要引用的实例。