fastjson 使用时遇到的问题

今天服务端又修改了接口,导致了本地的解析json的工具类不能使用,本来以为,小改一下就ok了,看到服务端返回的结果傻眼了.下面以小Demo的方式进行说明,方便自己以后查看.

先看看服务端返回的json格式类型

{
"users": [
{
"id": "10001",
"name": "张三",
"age": 20,
"address": "AAAAAAAAAAAAAAAAAAAAAAAAAAA",
"images": [
{
"title": "A头像1",
"url": "http://192.168.191.202/images/01.png",
"desc": "用户第一个头像"
},
{
"title": "A头像2",
"url": "http://192.168.191.202/images/02.png",
"desc": "用户第二个头像"
},
{
"title": "A头像3",
"url": "http://192.168.191.202/images/03.png",
"desc": "用户第三个头像"
}
]
},
{
"id": "10002",
"name": "李四",
"age": 22,
"address": "BBBBBBBBBBBBBBBBBBBBBBBBB",
"images": [
{
"title": "B头像1",
"url": "http://192.168.191.202/images/11.png",
"desc": "用户第一个头像"
},
{
"title": "B头像2",
"url": "http://192.168.191.202/images/12.png",
"desc": "用户第二个头像"
},
{
"title": "B头像2",
"url": "http://192.168.191.202/images/12.png",
"desc": "用户第二个头像"
},
{
"title": "B头像3",
"url": "http://192.168.191.202/images/13.png",
"desc": "用户第三个头像"
}
]
}
]
}

由于刚出道不久,也第一次在实际中遇到这样的json,本以为利用fastjson封装成相关的bean对象就可以解决了.

User对象:

package com.example.fastjsontest;

import java.util.List;

public class User {
private int id;
private String name;
private int age;
private String address;
private List<Images> images;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
public List<Images> getImages() {
return images;
}
public void setImages(List<Images> images) {
this.images = images;
}

}

Images对象:

package com.example.fastjsontest;

public class Images {
private String title;
private String url;
private String desc;
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public String getUrl() {
return url;
}
public void setUrl(String url) {
this.url = url;
}
public String getDesc() {
return desc;
}
public void setDesc(String desc) {
this.desc = desc;
}

}

然后利用fastjson的方法:JSON.parseArray(node, clazz);deBug 发现返回的List<User>为空,并抛出了com.alibaba.fastjson.JSONException: default constructor not found..上网查了一下,原来fastjson bean对象 包含非java自定义类型,好像jdk 8.0的一个日期类型也不支持.最后无奈,只好自己手动解析各个节点,通过set方法进行设值.

感觉到自己写的这个json解析的效率不高,但是fastjson也不能用,可能是还不知道要怎么用.如果大神们有什么建议或者方案,小弟感恩不尽!