校园二手商铺开发文档-分类管理模块

版权声明：转载需声明本人出品 https://blog.csdn.net/weixin_40288381/article/details/88833426

后台

后台中模块中的请求都需先管理员先登录

添加分类

Controller层

@RequestMapping("add_category.do")
    @ResponseBody
    public ServerResponse addCategory(HttpSession session,String categoryName,@RequestParam(value = "parentId",defaultValue = "0") int parentId){
        User user = (User)session.getAttribute(Const.CURRENT_USER);
        if(user == null){
            return ServerResponse.createByErrorCodeMessage(ResponseCode.NEED_LOGIN.getCode(),"用户未登录，请先登录");
        }
        //校验是否为管理员
        if(iUserService.checkAdminRole(user).isSuccess()){
            //是管理员
            return iCategoryService.addCategory(categoryName,parentId);
        }else{
            //非管理员
            return ServerResponse.createByErrorMessage("无权限操作，需要管理员权限");
        }

    }

Service层

public ServerResponse addCategory(String categoryName,Integer parentId){
        if(parentId == null || StringUtils.isBlank(categoryName)){
            return ServerResponse.createByErrorMessage("添加品类参赛错误");
        }
        Category category = new Category();
        category.setName(categoryName);
        category.setParentId(parentId);
        category.setStatus(true);//声明分类可用

        int rowCount = categoryMapper.insert(category);
        if(rowCount > 0){
            return ServerResponse.createBySuccess("添加品类成功");
        }
        return ServerResponse.createByErrorMessage("添加品类失败");
    }

表单

<h3>Add Category</h3>
<form name="AddCategory" action="/manage/category/add_category.do" method="post">
    categoryName  <input type="text" name="categoryName"/><br>
    parentId  <input type="text" name="parentId"/><br>
    <input type="submit" value="submit"/>
</form>

返回JSON对象

{“status”:0,“msg”:“登录成功”,“data”:{“id”:6,“username”:“Admin”,“password”:"",“email”:“[email protected]”,“phone”:“13553382811”,“question”:“question8”,“answer”:“answer8”,“role”:1,“createtime”:1553612265000,“updatetime”:1553612265000}}

---

修改分类名

Controller层

@RequestMapping("set_category_name.do")
    @ResponseBody
    public ServerResponse setCategoryName(HttpSession session,Integer categoryId,String categoryName){
        User user = (User)session.getAttribute(Const.CURRENT_USER);
        if(user == null){
            return ServerResponse.createByErrorCodeMessage(ResponseCode.NEED_LOGIN.getCode(),"用户未登录，请先登录");
        }
        //校验是否为管理员
        if(iUserService.checkAdminRole(user).isSuccess()){
            //是管理员
            //查询子节点的Category信息
            return  iCategoryService.updateCategoryName(categoryId,categoryName);
        }
        return ServerResponse.createByErrorMessage("无权限操作，需要管理员权限");

    }

Service层

public ServerResponse updateCategoryName(Integer categoryId,String categoryName){
        if(categoryId == null || StringUtils.isBlank(categoryName)){
            return ServerResponse.createByErrorMessage("更新品类参赛错误");
        }
        //new Category对象插入对应的数据
        Category category = new Category();
        category.setId(categoryId);
        category.setName(categoryName);

        int rowCount = categoryMapper.updateByPrimaryKeySelective(category);
        if(rowCount >0){
            return ServerResponse.createBySuccess("更新品类成功");
        }
        return ServerResponse.createByErrorMessage("更新品类失败");
    }

表单

<h3>Set CategoryName</h3>
<form name="SetCategoryName" action="/manage/category/set_category_name.do" method="post">
    categoryId  <input type="text" name="categoryId"/><br>
    categoryName  <input type="text" name="categoryName"/><br>
    <input type="submit" value="submit"/>
</form>

返回JSON对象

{“status”:0,“data”:“更新品类成功”}

---

返回当前节点所有的子节点(不包括更下一层)

Controller层

@RequestMapping("get_category.do")
    @ResponseBody
    public ServerResponse getChildrenParallelCategory(HttpSession session,@RequestParam(value = "categoryId",defaultValue = "0") Integer categoryId){
        User user = (User)session.getAttribute(Const.CURRENT_USER);
        if(user == null){
            return ServerResponse.createByErrorCodeMessage(ResponseCode.NEED_LOGIN.getCode(),"用户未登录，请先登录");
        }
        //校验是否为管理员
        if(iUserService.checkAdminRole(user).isSuccess()){
            //是管理员
            //查询子节点的Category信息
            return  iCategoryService.getChildrenParallelCategory(categoryId);
        }
        return ServerResponse.createByErrorMessage("无权限操作，需要管理员权限");

    }

Service层

public ServerResponse<List<Category>> getChildrenParallelCategory(Integer categoryId){
		//新写categoryMapper中selectCategoryChildrenByParentId方法
        List<Category> list = categoryMapper.selectCategoryChildrenByParentId(categoryId);
        if(CollectionUtils.isEmpty(list)){
            logger.info("未找到当前分类的子分类");
        }
        return ServerResponse.createBySuccess(list);
    }

Mapper层

<select id="selectCategoryChildrenByParentId" resultMap="BaseResultMap" parameterType="int">
    SELECT
    <include refid="Base_Column_List"/>
    FROM mall_category
    where parent_id=#{parent_id}
  </select>

表单

<h3>Get Category</h3>
<form name="GetCategory" action="/manage/category/get_category.do" method="post">
    categoryId  <input type="text" name="categoryId"/><br>
    <input type="submit" value="submit"/>
</form>

返回JSON对象

{“status”:0,“data”:[{“id”:7,“parentId”:1,“name”:“小风扇”,“status”:true,“sortOrder”:null,“createtime”:1553607998000,“updatetime”:1553608002000},{“id”:8,“parentId”:1,“name”:“小冰箱”,“status”:true,“sortOrder”:null,“createtime”:1553608022000,“updatetime”:1553608027000}]}

---

返回当前节点的所有子节点(递归到更下一层)

Controller

 @RequestMapping("get_deep_category.do")
    @ResponseBody
    public ServerResponse getCategoryAndDeepChildrenCategory(HttpSession session,@RequestParam(value = "categoryId",defaultValue = "0") Integer categoryId){
        User user = (User)session.getAttribute(Const.CURRENT_USER);
        if(user == null){
            return ServerResponse.createByErrorCodeMessage(ResponseCode.NEED_LOGIN.getCode(),"用户未登录，请先登录");
        }
        //校验是否为管理员
        if(iUserService.checkAdminRole(user).isSuccess()){
            //是管理员
            //查询当前节点的id和递归子节点的Category信息
           return iCategoryService.selectCategoryAndChildrenById(categoryId);
        }
        return ServerResponse.createByErrorMessage("无权限操作，需要管理员权限");

    }

Service层

public ServerResponse<List<Integer>> selectCategoryAndChildrenById(Integer categoryId){
        Set<Category> categorySet = Sets.newHashSet();
        findChildCategory(categorySet,categoryId);
		
		//将Set中的节点添加到list
        List<Integer> categotyList = Lists.newArrayList();
        if(categoryId != null){
            for(Category categoryItem : categorySet){
                categotyList.add(categoryItem.getId());
            }
        }
        return ServerResponse.createBySuccess(categotyList);
    }

    //递归算法,算出子节点
    private Set<Category> findChildCategory(Set<Category> categorySet,Integer categoryId){
    	//根据Id返回Category对象，若存在则添加进入参的Set
        Category category = categoryMapper.selectByPrimaryKey(categoryId);
        if(category != null){
            categorySet.add(category);
        }
		//先得到当前节点的所有子节点Id-只包括一层
		//将所有子节点Id封装到List中，继续进行获取"子节点直到子节点没有子节点"
        List<Category> categoryList = categoryMapper.selectCategoryChildrenByParentId(categoryId);
        for (Category categoryItem : categoryList){
            findChildCategory(categorySet,categoryItem.getId());
        }
        return categorySet;
    }

表单

<h3>Get DeepCategory</h3>
<form name="GetDeepCategory" action="/manage/category/get_deep_category.do" method="post">
    categoryId  <input type="text" name="categoryId"/><br>
    <input type="submit" value="submit"/>
</form>

返回JSON对象

{“status”:0,“data”:[1,7,8]}