src/com/shop/controller/OsCategoryListController.java

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package com.shop.controller;

import com.shop.po.OsCategory;
import com.shop.po.OsProduct;
import com.shop.service.OsCategoryService;
import com.shop.service.OsProductService;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;

import javax.servlet.http.HttpServletRequest;
import java.util.List;

/**
 * @Author 康健
 * @Date 2017/8/12 15:04
 */
@Controller
public class OsCategoryListController {

    @Autowired
    private OsCategoryService osCategoryService;
    @Autowired
    private OsProductService osProductService;

    /**
     * GET 类目列表
     * @return
     * */
    @RequestMapping(value = "/list")
    public String list(
            @RequestParam(value = "categoryId", required = false, defaultValue = "1") String reqCategoryId,
            @RequestParam(value = "sort", required = false, defaultValue = "0") String reqSort,
            @RequestParam(value = "page", required = false, defaultValue = "1") String reqPage,
            @RequestParam(value = "limit", required = false, defaultValue = "4") Integer limit,
            HttpServletRequest request) {

        // 请求参数:类目ID,如果类目ID不存在或者不为Long类型,则默认1/全部商品
        Long categoryId = StringUtils.isNumeric(reqCategoryId) ? Long.valueOf(reqCategoryId) : 1;
        // 请求参数:排序方式,如果排序方式不存在或者不为Integer类型,则默认0/推荐排序
        Integer sort = StringUtils.isNumeric(reqSort) ? Integer.valueOf(reqSort) : 0;
        // 请求参数:分页,如果分页不存在或者不为Integer类型,则默认1/默认页数
        Integer page = StringUtils.isNumeric(reqPage) ? Integer.valueOf(reqPage) : 1;

        // 查找当前类目信息
        OsCategory category = osCategoryService.getByCategoryId(categoryId);
        if (category != null) {

            // 通过类目ID、排序、分页查找商品列表
            List<OsProduct> products = osProductService.pageProductInfo(categoryId,sort,page,limit);

            // 根据类目ID查找子类目
            List<OsCategory> lowerCategories = osCategoryService.listLowerCategories(categoryId);

            // 根据类目ID查找上级类目列表
            List<OsCategory> upperCategories = osCategoryService.listUpperCategories(categoryId);
            com.shop.common.PageInfo info = new  com.shop.common.PageInfo(page.intValue(), limit.intValue(), "", "");