MyBatisPlus的通用查询，简直可以丢弃Dao和mapper.xml了

?

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34

/**  *  * @author shenjing  * @date 2018/6/20  */ @Service public class LocalDispatchServiceImpl extends ServiceImpl<Rep_DisPatchDao, Rep_DisPatch> implements LocalDispatchService {     /**      * 根据domain组合各种类型的查询,一般的查询就可以通过这个完成了，dao完全没有存在的意义了      *      * @param domain      * @return      */     @Override     public Rep_DisPatch findOneByDomain(Rep_DisPatch domain) {         EntityWrapper<Rep_DisPatch> eWrapper = new EntityWrapper<>(domain);         return selectOne(eWrapper);     }       /**      * 根据分页参数进行查询      *      * @param dispatchPageParam      * @return      */     @Override     public Page<Rep_DisPatch> findListByPage(DispatchPageParam dispatchPageParam) {         Page<Rep_DisPatch> page = new Page<>(dispatchPageParam.getPageIndex(), dispatchPageParam.getPageSize());         EntityWrapper<Rep_DisPatch> eWrapper = new EntityWrapper<>(dispatchPageParam.getObj());         Page<Rep_DisPatch> ret = selectPage(page, eWrapper);         return ret;     }   }

　　此处ServiceImpl，是myBatisPlus提供的一个基类。

?

1	DispatchPageParam 是自己写的一个查询参数的封装<br><br>

?

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36

/**  * 基础分页参数  * @author shenjing  * @date 2018/6/20  */ public class BasePageParam<T> {     T obj;       int pageIndex;       int pageSize;       public T getObj() {         return obj;     }       public void setObj(T obj) {         this.obj = obj;     }       public int getPageIndex() {         return pageIndex;     }       public void setPageIndex(int pageIndex) {         this.pageIndex = pageIndex;     }       public int getPageSize() {         return pageSize;     }       public void setPageSize(int pageSize) {         this.pageSize = pageSize;     } }

　　实际上这个里面什么都没有，只要继承基类就可以了

?

1 2 3 4 5 6

/**  * Created by shenjing on 2018/6/20.  */ public class DispatchPageParam extends BasePageParam<Rep_DisPatch> {   }