mybatis collection 一对多映射返回的对象为空的处理
我这里是一个任务对应多个用例,是一对多的关系,直接上代码:
package com.gameloft9.demo.dataaccess.model.task;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import com.gameloft9.demo.base.BaseEntity;
import com.gameloft9.demo.dataaccess.model.biz.InterfaceMain;
import lombok.Data;
import lombok.EqualsAndHashCode;
@Data @EqualsAndHashCode(callSuper=true)
public class Task extends BaseEntity{
/**
*
*/
private static final long serialVersionUID = 1L;
/**任务编号*/
private String taskCode;
/**接口名称*/
private String taskName;
/**起始时间YYYYmmDDHHmmss,每小时,周,月运行时候不能为空**/
private Date startTime;
/**结束时间YYYYmmDDHHmmss*/
private Date endTime;
/**周期类型 h:每小时;d:每天; w:每周 ;m:每月**/
private String cycleType;
private ArrayList interfaceUserCaseList;
}
package com.gameloft9.demo.dataaccess.model.biz;
import com.gameloft9.demo.base.BaseEntity;
import lombok.Data;
import lombok.EqualsAndHashCode;
@Data @EqualsAndHashCode(callSuper=true)
public class InterfaceMain extends BaseEntity{
/**
*
*/
private static final long serialVersionUID = 1L;
/**接口编号*/
private String interfaceCode;
/**接口名称*/
private String interfaceName;
/**备注*/
private String bz;
}
映射文件XML
dao层
package com.gameloft9.demo.dataaccess.dao.task;
import com.gameloft9.demo.dataaccess.model.task.Task;
import org.apache.ibatis.annotations.Param;
import java.util.List;
/**
* Created by zgb on 2018/06/28.
*/
public interface TaskMapper {
/**
* 查找
* @param id
* @return
*/
Task selectByPrimaryKey(String id);
}
serverImpl层,此处接口层我不写了!
package com.gameloft9.demo.service.impl.task;
import com.gameloft9.demo.service.api.task.TaskService;
import com.gameloft9.demo.service.beans.system.PageRange;
import com.gameloft9.demo.service.beans.task.TaskRequest;
import com.gameloft9.demo.service.beans.task.TaskResponse;
import com.gameloft9.demo.utils.Constants;
import com.gameloft9.demo.utils.UUIDUtil;
import com.gameloft9.demo.dataaccess.dao.task.TaskInterfaceMapper;
import com.gameloft9.demo.dataaccess.dao.task.TaskMapper;
import com.gameloft9.demo.dataaccess.model.task.Task;
import com.gameloft9.demo.dataaccess.model.task.TaskInterface;
import com.gameloft9.demo.mgrframework.utils.CheckUtil;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import java.util.Date;
import java.util.List;
/**
* Created by zgb on 2018/06/28.
*/
@Service
@Slf4j
public class TaskServiceImpl implements TaskService {
@Autowired
TaskMapper dao;
/**
* 根据id获取记录
* @param id 主键
* */
public TaskResponse getById(String id){
CheckUtil.notBlank(id,"id为空");
TaskResponse taskResponse = new TaskResponse();
Task task = dao.selectByPrimaryKey(id);
taskResponse.setId(task.getId());
taskResponse.setTaskCode(task.getTaskCode());
taskResponse.setTaskName(task.getTaskName());
taskResponse.setCreateTime(task.getCreateTime());
taskResponse.setUpdateTime(task.getUpdateTime());
taskResponse.setStartTime(task.getStartTime());
taskResponse.setEndTime(task.getEndTime());
return taskResponse;
}
}
调试的时候,task对象里面属性的值为空,怎么解决,搞了好久,终于找到突破口,请看代码映射map的XML修改:
看清楚了没
selectByPrimaryKey column 对应的是数据库查询出来的字段的别名,并不是数据库对应的字段名!!!,这样查出的对象就不为空了!