mybatis-plus多数据源配置

Mybatis-Plus支持多数据源配置，可以通过配置多个数据源来实现在不同的数据库中进行数据操作。具体配置步骤如下：

1. 在application.properties文件中配置多个数据源的连接信息，例如：

# 数据源1
spring.datasource.url=jdbc:mysql://localhost:3306/db1?useUnicode=true&characterEncoding=utf-8&useSSL=false
spring.datasource.username=root
spring.datasource.password=root
spring.datasource.driver-class-name=com.mysql.jdbc.Driver

# 数据源2
spring.datasource.test2.url=jdbc:mysql://localhost:3306/db2?useUnicode=true&characterEncoding=utf-8&useSSL=false
spring.datasource.test2.username=root
spring.datasource.test2.password=root
spring.datasource.test2.driver-class-name=com.mysql.jdbc.Driver

2. 在Mybatis-Plus的配置文件中配置多个SqlSessionFactory，例如：

@Configuration
public class MybatisPlusConfig {
    @Bean(name = "test1SqlSessionFactory")
    public SqlSessionFactory test1SqlSessionFactory(@Qualifier("test1DataSource") DataSource dataSource) throws Exception {
        MybatisSqlSessionFactoryBean bean = new MybatisSqlSessionFactoryBean();
        bean.setDataSource(dataSource);
        bean.setMapperLocations(new PathMatchingResourcePatternResolver().getResources("classpath*:mapper/test1/*.xml"));
        return bean.getObject();
    }

    @Bean(name = "test2SqlSessionFactory")
    public SqlSessionFactory test2SqlSessionFactory(@Qualifier("test2DataSource") DataSource dataSource) throws Exception {
        MybatisSqlSessionFactoryBean bean = new MybatisSqlSessionFactoryBean();
        bean.setDataSource(dataSource);
        bean.setMapperLocations(new PathMatchingResourcePatternResolver().getResources("classpath*:mapper/test2/*.xml"));
        return bean.getObject();
    }
}

3. 在Mybatis-Plus的配置文件中配置多个MapperScannerConfigurer，例如：

@Configuration
public class MybatisPlusConfig {
    @Bean(name = "test1MapperScannerConfigurer")
    public MapperScannerConfigurer test1MapperScannerConfigurer() {
        MapperScannerConfigurer configurer = new MapperScannerConfigurer();
        configurer.setBasePackage("com.example.mapper.test1");
        configurer.setSqlSessionFactoryBeanName("test1SqlSessionFactory");
        return configurer;
    }

    @Bean(name = "test2MapperScannerConfigurer")
    public MapperScannerConfigurer test2MapperScannerConfigurer() {
        MapperScannerConfigurer configurer = new MapperScannerConfigurer();
        configurer.setBasePackage("com.example.mapper.test2");
        configurer.setSqlSessionFactoryBeanName("test2SqlSessionFactory");
        return configurer;
    }
}

4. 在Mapper接口中使用@Mapper注解指定对应的SqlSessionFactory，例如：

@Mapper
public interface Test1Mapper {
    // ...
}

@Mapper
public interface Test2Mapper {
    // ...
}

这样就可以在不同的Mapper接口中使用不同的数据源进行数据操作了。