Spring Boot自定义Mapper的SQL语句

代码如下：
先创建一个Provider类：

public class RptEbankFsymtTranflowingProvider {
    
    public String select(String orgId, String startDate, String endDate, String merId) {
        String sql = "select * from RPT_EBANK_FSYMT_TRANFLOWING where 1=1";
        if (orgId != null) {
            sql += " and ORG_ID=#{orgId}";
        }
        if (startDate != null) {
            sql += " and DATA_DT>=#{startDate}";
        }
        if (endDate != null) {
            sql += " and DATA_DT<=#{endDate}";
        }
        if (merId != null) {
            sql += " and MER_ID=#{merId}";
        }
        return sql;
    }
}

然后在代码中类似如下使用它：

@Mapper
public interface RptEbankMerchantDetailMapper {
    // 查询所有数据
    @Select("select * from RPT_EBANK_MERCHANT_DETAIL")
    List<RptEbankMerchantDetail> getAllRptEbankMerchantDetail();
    
    @SelectProvider(method = "select", type = RptEbankMerchantDetailProvider.class)
    List<RptEbankMerchantDetail> getRptEbankMerchantDetail(@Param("orgId") String orgId, 
                                                                @Param("startDate") String startDate, 
                                                                @Param("endDate") String endDate, 
                                                                @Param("merId") String merId);
}