content: package com.itheima.reggie.controller;
  
  import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
  import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
  import com.itheima.reggie.common.R;
  import com.itheima.reggie.entity.Category;
  import com.itheima.reggie.service.CategoryService;
  import lombok.extern.slf4j.Slf4j;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.stereotype.Service;
  import org.springframework.web.bind.annotation.*;
  
  import java.util.List;
  
  /**
   * 分类管理
   */
  @RestController
  @RequestMapping("/category")
  @Slf4j
  public class CategoryController {
      @Autowired
      private CategoryService categoryService;
  
      /**
       * 新增分类
       * @param category
       * @return
       */
      @PostMapping
      public R<String> save(@RequestBody Category category){
          log.info("category:{}",category);
          categoryService.save(category);
          return R.success("新增分类成功");
      }
  
      /**
       * 分页查询
       * @param page
       * @param pageSize
       * @return
       */
      @GetMapping("/page")
      public R<Page> page(int page,int pageSize){
          //分页构造器
          Page<Category> pageInfo = new Page<>(page,pageSize);
          //条件构造器
          LambdaQueryWrapper<Category> queryWrapper = new LambdaQueryWrapper<>();
          //添加排序条件，根据sort进行排序
          queryWrapper.orderByAsc(Category::getSort);
  
          //分页查询
          categoryService.page(pageInfo,queryWrapper);
          return R.success(pageInfo);
      }
  
      /**
       * 根据id删除分类
       * @param id
       * @return
       */
      @DeleteMapping
      public R<String> delete(Long id){
          log.info("删除分类，id为：{}",id);
  
          //categoryService.removeById(id);
          categoryService.remove(id);
  
          return R.success("分类信息删除成功");
      }
  
      /**
       * 根据id修改分类信息
       * @param category
       * @return
       */
      @PutMapping
      public R<String> update(@RequestBody Category category){
          log.info("修改分类信息：{}",category);
  
          categoryService.updateById(category);
  
          return R.success("修改分类信息成功");
      }
  
      /**
       * 根据条件查询分类数据
       * @param category
       * @return
       */
      @GetMapping("/list")
      public R<List<Category>> list(Category category){
          //条件构造器
          LambdaQueryWrapper<Category> queryWrapper = new LambdaQueryWrapper<>();
          //添加条件
          queryWrapper.eq(category.getType() != null,Category::getType,category.getType());
          //添加排序条件
          queryWrapper.orderByAsc(Category::getSort).orderByDesc(Category::getUpdateTime);
  
          List<Category> list = categoryService.list(queryWrapper);
          return R.success(list);
      }
  }
  