MybatisPlus 配置多数据源

在MyBatis Plus中配置多数据源通常涉及以下几个步骤：

1. 配置数据源信息。
2. 配置SqlSessionFactory和Mapper接口。
3. 使用AbstractRoutingDataSource实现动态数据源的路由。

以下是一个简化的示例代码：

// 配置数据源
@Configuration
public class DataSourceConfig {
 
    @Bean
    @ConfigurationProperties("spring.datasource.primary")
    public DataSource primaryDataSource() {
        return DataSourceBuilder.create().build();
    }
 
    @Bean
    @ConfigurationProperties("spring.datasource.secondary")
    public DataSource secondaryDataSource() {
        return DataSourceBuilder.create().build();
    }
 
    // 配置动态数据源
    @Bean
    public DynamicDataSource dynamicDataSource() {
        DynamicDataSource dynamicDataSource = new DynamicDataSource();
        dynamicDataSource.setDefaultTargetDataSource(primaryDataSource());
        Map<Object, Object> dataSourceMap = new HashMap<>();
        dataSourceMap.put("primary", primaryDataSource());
        dataSourceMap.put("secondary", secondaryDataSource());
        dynamicDataSource.setTargetDataSources(dataSourceMap);
        return dynamicDataSource;
    }
 
    // 配置SqlSessionFactory
    @Bean
    public SqlSessionFactory sqlSessionFactory(DynamicDataSource dynamicDataSource) throws Exception {
        SqlSessionFactoryBean sqlSessionFactoryBean = new SqlSessionFactoryBean();
        sqlSessionFactoryBean.setDataSource(dynamicDataSource);
        return sqlSessionFactoryBean.getObject();
    }
}
 
// 动态数据源
public class DynamicDataSource extends AbstractRoutingDataSource {
    @Override
    protected Object determineCurrentLookupKey() {
        return DataSourceContextHolder.getCurrentDataSource();
    }
}
 
// 数据源上下文持有者
public class DataSourceContextHolder {
    private static final ThreadLocal<String> contextHolder = new ThreadLocal<>();
 
    public static void setCurrentDataSource(String dataSourceType) {
        contextHolder.set(dataSourceType);
    }
 
    public static String getCurrentDataSource() {
        return contextHolder.get();
    }
 
    public static void clearDataSource() {
        contextHolder.remove();
    }
}
 
// 使用动态数据源
public class DataSourceRouting {
    public void usePrimaryDataSource() {
        DataSourceContextHolder.setCurrentDataSource("primary");
        // 执行操作
        DataSourceContextHolder.clearDataSource();
    }
 
    public void useSecondaryDataSource() {
        DataSourceContextHolder.