1.错误代码

/***
     * 获取商品秒杀政策
     * @param list
     * @return
     */

    private Map<String, Object> getLimitPolicy(ArrayList<Map<String, Object>> list){
        Map<String, Object> resultMap = new HashMap<String, Object>();

        for (Map<String, Object> skuMap: list){
            //3.1、从redis取出政策
            String policy = stringRedisTemplate.opsForValue().get("LIMIT_POLICY_"+skuMap.get("sku_id").toString());

            //3.2、判断有政策的才继续
            if (policy!=null&&!policy.equals("")){
              //  Map<String, Object> policyInfo = JSONObject.parseObject(policy, Map.class);
               Limit_Policy  limit_policy=JSONObject.parseObject(policy,Limit_Policy.class);
                //3.3、开始时间小于等于当前时间，并且当前时间小于等于结束时间
                SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm");
                String now = restTemplate.getForObject("http://leyou-time-server/getTime", String.class);
                try {
                    Date end_time = simpleDateFormat.parse(limit_policy.getEnd_time().toString());
                    Date begin_time = simpleDateFormat.parse(limit_policy.getBegin_time().toString());
                    Date now_time = simpleDateFormat.parse(now);

                    if (begin_time.getTime()<=now_time.getTime()&&now_time.getTime()<=end_time.getTime()){
                        skuMap.put("limitPrice", limit_policy.getPrice());
                        skuMap.put("limitQuanty", limit_policy.getQuanty());
                        skuMap.put("limitBeginTime", limit_policy.getBegin_time());
                        skuMap.put("limitEndTime", limit_policy.getEnd_time());
                        skuMap.put("nowTime", now);
                    }

                } catch (ParseException e) {
                    e.printStackTrace();
                }
            }
        }
        resultMap.put("result", true);
        resultMap.put("msg", "");
        return resultMap;
    }

   出错位置: Limit_Policy  limit_policy=JSONObject.parseObject(policy,Limit_Policy.class);

2.redis 数据

Limit_Policy{id=0, sku_id=26816294479, quanty=7777, price=1000, begin_time=Sun Dec 29 19:00:00 CST 2019, end_time=Mon Dec 30 06:00:00 CST 2019}

3.实体类

package com.zengjx.leyou.pojo;

import org.springframework.stereotype.Component;

import java.io.Serializable;
import java.util.Date;

/**
 * @ClassName HelloController
 * @Description TODO
 * @Author zengjx
 * @Company zengjx
 * @Date 2019/12/29  16:30
 * @Version V1.0
 */
@Component
 public   class Limit_Policy   implements Serializable {
  private     long   id;
  private    long sku_id;
  private    int  quanty;
  private     int  price;
  private   Date  begin_time;
  private   Date end_time;

    public long getId() {
        return id;
    }

    public void setId(long id) {
        this.id = id;
    }

    public long getSku_id() {
        return sku_id;
    }

    public void setSku_id(long sku_id) {
        this.sku_id = sku_id;
    }

    public int getQuanty() {
        return quanty;
    }

    public void setQuanty(int quanty) {
        this.quanty = quanty;
    }

    public int getPrice() {
        return price;
    }

    public void setPrice(int price) {
        this.price = price;
    }

    public Date getBegin_time() {
        return begin_time;
    }

    public void setBegin_time(Date begin_time) {
        this.begin_time = begin_time;
    }

    public Date getEnd_time() {
        return end_time;
    }

    public void setEnd_time(Date end_time) {
        this.end_time = end_time;
    }

    public Limit_Policy() {
    }

    @Override
    public String toString() {
        return "Limit_Policy{" +
                "id=" + id +
                ", sku_id=" + sku_id +
                ", quanty=" + quanty +
                ", price=" + price +
                ", begin_time=" + begin_time +
                ", end_time=" + end_time +
                '}';
    }
}

4.错误日志

com.alibaba.fastjson.JSONException: syntax error, expect {, actual error, pos 0, fastjson-version 1.2.58
	at com.alibaba.fastjson.parser.deserializer.JavaBeanDeserializer.deserialze(JavaBeanDeserializer.java:489) ~[fastjson-1.2.58.jar:na]
	at com.alibaba.fastjson.parser.deserializer.JavaBeanDeserializer.parseRest(JavaBeanDeserializer.java:1537) ~[fastjson-1.2.58.jar:na]
	at com.alibaba.fastjson.parser.deserializer.FastjsonASMDeserializer_1_Limit_Policy.deserialze(Unknown Source) ~[na:na]
	at com.alibaba.fastjson.parser.deserializer.JavaBeanDeserializer.deserialze(JavaBeanDeserializer.java:284) ~[fastjson-1.2.58.jar:na]
	at com.alibaba.fastjson.parser.DefaultJSONParser.parseObject(DefaultJSONParser.java:689) ~[fastjson-1.2.58.jar:na]
	at com.alibaba.fastjson.JSON.parseObject(JSON.java:378) ~[fastjson-1.2.58.jar:na]
	at com.alibaba.fastjson.JSON.parseObject(JSON.java:282) ~[fastjson-1.2.58.jar:na]
	at com.alibaba.fastjson.JSON.parseObject(JSON.java:555) ~[fastjson-1.2.58.jar:na]
	at com.zengjx.leyou.service.StockService.getLimitPolicy(StockService.java:170) ~[classes/:na]
	at com.zengjx.leyou.service.StockService.getStockListBySpu_id(StockService.java:57) ~[classes/:na]

5.测试：

 

{
	
    "sku_id": 26816294479,
    "quanty": 7777,
    "price": 1000,
    "begin_time": "2019-12-29T11:00:00.000+0000",
    "end_time": "2019-12-29T22:00:00.000+0000"
}
    public static void main(String[] args) {

        String   policy="{\n" +
                "\t\n" +
                "    \"sku_id\": 26816294479,\n" +
                "    \"quanty\": 7777,\n" +
                "    \"price\": 1000,\n" +
                "    \"begin_time\": \"2019-12-29T11:00:00.000+0000\",\n" +
                "    \"end_time\": \"2019-12-29T22:00:00.000+0000\"\n" +
                "}";

        Limit_Policy parseObject = JSONObject.parseObject(policy, Limit_Policy.class);
        System.out.println(parseObject);
    }

 出错的json数据：与上面不同的是以LimitPolicy开头字符串

 使用json格式在线校验下面这行redis 读取的数据。

Limit_Policy {
	id = 0, sku_id = 26816294479, quanty = 7777, price = 1000, begin_time = Sun Dec 29 19: 00: 00 CST 2019, end_time = Mon Dec 30 06: 00: 00 CST 2019
}

校验出错：在线校验   http://www.bejson.com/

原因是实体类：重写了toString

//存入redis
stringRedisTemplate.opsForValue().set("LIMIT_POLICY_"+limit_policy.getSku_id(),limit_policy.toString(),end_diff, TimeUnit.SECONDS);

以下测试可以相互转换 

 

 

FastJson对实体类和Json还有JSONObject相互转换

1. 实体类或集合转JSON串

String besnString = JSONObject.toJSONString(实体类);

2.JSON串转JSONObject

JSONObject jsonObject = JSONObject.parseObject(jsonString);

3.JSON串转实体类

实体类 javaBean = JSON.parseObject(json, 实体类.class);

4.JSON串转带泛型的List的集合

List<实体类或其他泛型> list = JSON.parseObject(json, new TypeReference<List<实体类或其他泛型>>(){});
    public static void main(String[] args) {

        test2();
    }



    public   static   void    test1(){


        String   policy="{\n" +
                "\t\n" +
                "    \"sku_id\": 26816294479,\n" +
                "    \"quanty\": 7777,\n" +
                "    \"price\": 1000,\n" +
                "    \"begin_time\": \"2019-12-29T11:00:00.000+0000\",\n" +
                "    \"end_time\": \"2019-12-29T22:00:00.000+0000\"\n" +
                "}";

        Limit_Policy parseObject = JSONObject.parseObject(policy, Limit_Policy.class);
        System.out.println(parseObject);
    }


    public   static   void    test2(){

         Limit_Policy  limit_policy  =new Limit_Policy();
         limit_policy.setBegin_time(new Date());
         limit_policy.setEnd_time(new Date());
         limit_policy.setId(11111);
         limit_policy.setPrice(11111333);


        String besnString = JSONObject.toJSONString(limit_policy);
        System.out.println(besnString);//{"begin_time":1577625875722,"end_time":1577625875722,"id":11111,"price":11111333,"quanty":0,"sku_id":0}

        Limit_Policy parseObject = JSONObject.parseObject(besnString, Limit_Policy.class);
        System.out.println("反转"+parseObject);

    }

 6.修改

 原来：  stringRedisTemplate.opsForValue().set("LIMIT_POLICY_"+limit_policy.getSku_id(),limit_policy.toString(),end_diff, TimeUnit.SECONDS);
修改后
String besnString = JSONObject.toJSONString(limit_policy);
   stringRedisTemplate.opsForValue().set("LIMIT_POLICY_"+limit_policy.getSku_id(),besnString,end_diff, TimeUnit.SECONDS);

//存入redis
        String besnString = JSONObject.toJSONString(limit_policy);
     //   stringRedisTemplate.opsForValue().set("LIMIT_POLICY_"+limit_policy.getSku_id(),limit_policy.toString(),end_diff, TimeUnit.SECONDS);
        stringRedisTemplate.opsForValue().set("LIMIT_POLICY_"+limit_policy.getSku_id(),besnString,end_diff, TimeUnit.SECONDS);

 

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