完成前台门户页面系统功能（十一）门户页面商品列表展示的功能

package com.jingxi.rest.pojo;

import java.util.List;

import com.fasterxml.jackson.annotation.JsonProperty;

public class CatNode {
    @JsonProperty("n")
    private String name;
    @JsonProperty("u")
    private String url;
    @JsonProperty("i")
    private List<?> item;
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public String getUrl() {
        return url;
    }
    public void setUrl(String url) {
        this.url = url;
    }
    public List<?> getItem() {
        return item;
    }
    public void setItem(List<?> item) {
        this.item = item;
    }
    
    
}

package com.jingxi.rest.pojo;

import java.util.List;

public class CatResult {

    private List<?> data;

    public List<?> getData() {
        return data;
    }

    public void setData(List<?> data) {
        this.data = data;
    }
    
    
}

package com.jingxi.rest.service;

import java.util.ArrayList;
import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import com.jingxi.common.util.JsonUtils;
import com.jingxi.mapper.TbItemCatMapper;
import com.jingxi.model.TbContent;
import com.jingxi.model.TbItemCat;
import com.jingxi.model.TbItemCatExample;
import com.jingxi.model.TbItemCatExample.Criteria;
import com.jingxi.rest.dao.JedisClient;
import com.jingxi.rest.pojo.CatNode;
import com.jingxi.rest.pojo.CatResult;

@Service
public class ItemCatServiceImp implements ItemCatService {

    @Autowired
    private TbItemCatMapper itemCatMapper;
    
    @Autowired
    private JedisClient jedisClient;
    
    private static final String INDEX_ITEMCAT_REDIS_KEY="INDEX_ITEMCAT_REDIS_KEY";
    
    @Override
    public CatResult getItemCatList() {
        CatResult catResult = new CatResult();
        //查询分类列表
        catResult.setData(getCatList(0));
        //将parentid为0的查出来 然后放在catresult的data中
        return catResult;
    }
    /*** 查询分类列表* 
     * <p>Title: getCatList</p>* 
     * <p>Description: </p>* 
     * @param parentId* @return
     * */
    
    private List<?> getCatList(long parentId) {
        /*//去缓存中取数据
        try{
            String result=jedisClient.hget(INDEX_ITEMCAT_REDIS_KEY, parentId+"");
            if(result!=null){
                List<TbItemCat> resultList=JsonUtils.jsonToList(result, TbItemCat.class);
                return resultList;
            }
        }catch(Exception e){
            e.printStackTrace();
        }*/
        
        //创建查询条件
        TbItemCatExample example = new TbItemCatExample();
        Criteria criteria = example.createCriteria();
        criteria.andParentIdEqualTo(parentId);
        //执行查询
        List<TbItemCat> list = itemCatMapper.selectByExample(example);
        //返回值list
        List resultList = new ArrayList<>();
        //向list中添加节点
        int count = 0;
        for (TbItemCat tbItemCat : list) {
            //判断是否为父节点
            if (tbItemCat.getIsParent()) {
                CatNode catNode = new CatNode();
                if (parentId == 0) {
                    catNode.setName("<a "
                            + "href=‘/products/"+tbItemCat.getId()+".html‘>"+tbItemCat.getName()+"</a>");
                    } else {
                        catNode.setName(tbItemCat.getName());
                    }
                        catNode.setUrl("/products/"+tbItemCat.getId()+".html");
                        catNode.setItem(getCatList(tbItemCat.getId()));
                        resultList.add(catNode);
                        count ++;
                        //第一层只取14条记录
                        if (parentId == 0 && count >=14) {
                            break;
                            }
                        //如果是叶子节点
                        }else {
                            resultList.add("/products/"+tbItemCat.getId()
                            +".html|"                                  + tbItemCat.getName());
                            }
                        }
        /*//把数据放进缓存中
        try{
            //把list轉換成字符串
            String cacheString =JsonUtils.objectToJson(resultList);
            jedisClient.hset(INDEX_ITEMCAT_REDIS_KEY, parentId+"", cacheString);
        }catch(Exception e){
            e.printStackTrace();
        }*/
        
        return resultList;
            }
        
    }