苍穹外卖--菜品管理-分页查询功能实现

sky-server/src/main/java/com/sky/controller/admin/DishController.java

@@ -1,16 +1,15 @@
 package com.sky.controller.admin;
 
 import com.sky.dto.DishDTO;
+import com.sky.dto.DishPageQueryDTO;
+import com.sky.result.PageResult;
 import com.sky.result.Result;
 import com.sky.service.DishService;
 import io.swagger.annotations.Api;
 import io.swagger.annotations.ApiOperation;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.web.bind.annotation.PostMapping;
-import org.springframework.web.bind.annotation.RequestBody;
-import org.springframework.web.bind.annotation.RequestMapping;
-import org.springframework.web.bind.annotation.RestController;
+import org.springframework.web.bind.annotation.*;
 
 @RestController
 @Slf4j
@@ -30,4 +29,15 @@ public class DishController {
 
         return Result.success();
     }
+
+
+    @GetMapping("/page")
+    @ApiOperation("菜品分页查询")
+    public Result<PageResult> page(DishPageQueryDTO dishPageQueryDTO){
+        log.info("菜品分页查询：{}",dishPageQueryDTO);
+        //调用业务层的分页查询功能
+        PageResult pageResult = dishService.pageQuery(dishPageQueryDTO);
+
+        return Result.success(pageResult);
+    }
 }

sky-server/src/main/java/com/sky/mapper/DishMapper.java

@@ -1,8 +1,11 @@
 package com.sky.mapper;
 
+import com.github.pagehelper.Page;
 import com.sky.annotation.AutoFill;
+import com.sky.dto.DishPageQueryDTO;
 import com.sky.entity.Dish;
 import com.sky.enumeration.OperationType;
+import com.sky.vo.DishVO;
 import org.apache.ibatis.annotations.Mapper;
 import org.apache.ibatis.annotations.Options;
 import org.apache.ibatis.annotations.Select;
@@ -24,4 +27,11 @@ public interface DishMapper {
      */
     @AutoFill(OperationType.INSERT)
     void insert(Dish dish);
+
+    /**
+     * 分页查询
+     * @param dto
+     * @return
+     */
+    Page<DishVO> pageQuery(DishPageQueryDTO dto);
 }

sky-server/src/main/java/com/sky/service/DishService.java

@@ -1,10 +1,19 @@
 package com.sky.service;
 
 import com.sky.dto.DishDTO;
+import com.sky.dto.DishPageQueryDTO;
+import com.sky.result.PageResult;
 
 public interface DishService {
     /*
     新增菜品和它的口味
      */
     void saveDishWitchFlavor(DishDTO dto);
+
+    /**
+     * 分页查询
+     * @param dishPageQueryDTO
+     * @return
+     */
+    PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO);
 }

sky-server/src/main/java/com/sky/service/impl/DishServiceImpl.java

@@ -1,11 +1,16 @@
 package com.sky.service.impl;
 
+import com.github.pagehelper.Page;
+import com.github.pagehelper.PageHelper;
 import com.sky.dto.DishDTO;
+import com.sky.dto.DishPageQueryDTO;
 import com.sky.entity.Dish;
 import com.sky.entity.DishFlavor;
 import com.sky.mapper.DishFlavorMapper;
 import com.sky.mapper.DishMapper;
+import com.sky.result.PageResult;
 import com.sky.service.DishService;
+import com.sky.vo.DishVO;
 import org.springframework.beans.BeanUtils;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
@@ -46,4 +51,16 @@ public class DishServiceImpl implements DishService {
         }
 
     }
+
+    /**
+     * 菜品分页查询
+     * @param dto
+     * @return
+     */
+    @Override
+    public PageResult pageQuery(DishPageQueryDTO dto) {
+        PageHelper.startPage(dto.getPage(), dto.getPageSize());
+        Page<DishVO> page = dishMapper.pageQuery(dto);
+        return new PageResult(page.getTotal(),page.getResult());
+    }
 }

sky-server/src/main/resources/mapper/DishMapper.xml

@@ -7,4 +7,20 @@
         insert into dish (name, category_id, price, image, description, create_time, update_time, create_user, update_user,status)
         values (#{name},#{categoryId},#{price},#{image},#{description},#{createTime},#{updateTime},#{createUser},#{updateUser},#{status})
     </insert>
+    <select id="pageQuery" resultType="com.sky.vo.DishVO">
+        SELECT d.*,c.name categoryName FROM dish d LEFT JOIN category c ON d.category_id = c.id
+           <where>
+               <if test="name != null and name != ''">
+                   and d.name like concat('%',#{name},'%')
+               </if>
+               <if test="categoryId != null">
+                   and d.category_id = #{categoryId}
+               </if>
+               <if test="status != null">
+                   and d.status = #{status}
+               </if>
+           </where>
+
+        ORDER BY d.create_time DESC
+    </select>
 </mapper>