使用fastjson解析较为复杂的json数据。

app设计中，很多倾向于使用json。

如果数据传递中，目录层次结构多，设计到的方面比较多了，json层级结构就比较复杂。

json解析有很多种方式，网上流传的fastjson是最快的方式。因此我自己做的糗事百科客户端中也使用了这个。这里记录下使用。

首先，看一段json数据。

{
    "count": 30, 
    "items": [
        {
            "image": null, 
            "published_at": 1415478930, 
            "tag": "", 
            "user": null, 
            "image_size": null, 
            "id": "93464687", 
            "votes": {
                "down": -86, 
                "up": 578
            }, 
            "created_at": 1415478930, 
            "content": "说个朋友的事情吧！很长，耐心看完！简短割一下，纯手打。一个男性朋友，以下简称齐，他是在动车组工作的，28岁，身高1.8米，相貌端正，不抽烟不喝酒，不好名牌，月薪5000，人很不错，去年夏天相亲认识个女的，以下简称璐，27岁，身高也就1.6米，工作临时工，月薪1000，喜欢车（自己买不起，家里不给买），什么东西都喜欢好的。今年俩人研究结婚，我们之间比较熟络，这是背景。之前问她处没处过对象，璐说就处过一个，处了半年。问过她和齐有没有住一起，璐说，夜不归宿她爸爸会打死她，老公是警察，公安网上查的到任何东西，那天璐让老公帮忙查点东西，结果老公意外发现璐的开房记录多达20多条，亮点是分别和6个不同的男的！！！他俩都看糗百，还是逆了吧！！！希望顶高点让男的看到，擦亮眼睛，别花了50多万娶家个好几手货！这条过了再爆璐家里提的各种奇葩要求！", 
            "state": "publish", 
            "comments_count": 30, 
            "allow_comment": true
        }, 
        {
            "image": null, 
            "published_at": 1415476799, 
            "tag": "", 
            "user": {
                "created_at": "0", 
                "last_device": null, 
                "role": "n", 
                "last_visited_at": "0", 
                "state": "active", 
                "login": "王致和—逗妇乳", 
                "id": "21544723", 
                "icon": "20141016154050.jpg"
            }, 
            "image_size": null, 
            "id": "93461303", 
            "votes": {
                "down": -41, 
                "up": 456
            }, 
            "created_at": 1415476799, 
            "content": "老妈:有对象了嘛？
我:没有呢
老妈:有了的话记得说啊，你那点生活费，不够的，别跟你爸似的，当年追我，天天邀我逛街，自己偷偷啃馒头，如果有了，我会给你财政拨款的，，， ，，，，，
顿时泪奔，这才是亲妈啊，，", 
            "state": "publish", 
            "comments_count": 4, 
            "allow_comment": true
        }, 

可以看出： item下包含了votes ,user , image_size....算是比较负责的了。

其次，解析。我们简历ItemBean, UserBean ,VoteBean,ImageSize . 这里需要注意的是

被包含在ItemBean中的UserBean,和ImageSize 实例名需要和json中的一致。否则不能完全对应解析。

	/**
	 * 用户信息
	 */
	private UserBean user;
	/**
	 * 点赞信息
	 */
	private VotesBean votes;

ItemBean

package com.qiubaiclient.model;

import java.io.Serializable;

/**
 * ItemBean JSON三级数据
 * 
 * @author xiangxm
 * 
 */
public class ItemBean implements Serializable {

	private int blog_type;

	public int getBlog_type() {
		return blog_type;
	}

	public void setBlog_type(int blog_type) {
		this.blog_type = blog_type;
	}

	/**
	 * 是否点击过
	 */
	private boolean isClicked = false;

	public boolean isClicked() {
		return isClicked;
	}

	public void setClicked(boolean isClicked, int whoClicked) {
		this.isClicked = isClicked;
		if (null != votes) {

			votes.setWhoClicked(whoClicked);
		}
	}

	/**
	 * 
	 */
	private static final long serialVersionUID = 1L;
	/**
	 * 文章附带的图片附件
	 */
	private String image;
	/**
	 * 发布时间
	 */
	private String published_at;
	/**
	 * 标志。暂时不知道是什么作用。
	 */
	private String tag;
	/**
	 * 文章对应的id
	 */
	private String id;
	/**
	 * 文章创建时间。区别于published_at
	 */
	private String created_at;
	/**
	 * 文章的内容
	 */
	private String content;
	/**
	 * 文章状态。糗百里面发布文章需要审核，估计这个是审核用的
	 */
	private String state;
	/**
	 * 评论数量
	 */
	private int comments_count;
	/**
	 * 是否允许评论
	 */
	private boolean allow_comment;
	/**
	 * 用户信息
	 */
	private UserBean user;
	/**
	 * 点赞信息
	 */
	private VotesBean votes;

	private ImageSize image_size;

	public ImageSize getImage_size() {
		return image_size;
	}

	public void setImage_size(ImageSize image_size) {
		this.image_size = image_size;
	}

	public String getImage() {
		return image;
	}

	public void setImage(String image) {
		this.image = image;
	}

	public String getPublished_at() {
		return published_at;
	}

	public void setPublished_at(String published_at) {
		this.published_at = published_at;
	}

	public String getTag() {
		return tag;
	}

	public void setTag(String tag) {
		this.tag = tag;
	}

	public String getId() {
		return id;
	}

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

	public String getCreated_at() {
		return created_at;
	}

	public void setCreated_at(String created_at) {
		this.created_at = created_at;
	}

	public String getContent() {
		return content;
	}

	public void setContent(String content) {
		this.content = content;
	}

	public String getState() {
		return state;
	}

	public void setState(String state) {
		this.state = state;
	}

	public int getComments_count() {
		return comments_count;
	}

	public void setComments_count(int comments_count) {
		this.comments_count = comments_count;
	}

	public boolean isAllow_comment() {
		return allow_comment;
	}

	public void setAllow_comment(boolean allow_comment) {
		this.allow_comment = allow_comment;
	}

	public UserBean getUser() {
		return user;
	}

	public void setUser(UserBean user) {
		this.user = user;
	}

	public VotesBean getVotes() {
		return votes;
	}

	public void setVotes(VotesBean votes) {
		this.votes = votes;
	}

	@Override
	public String toString() {
		return "ItemBean [blog_type=" + blog_type + ", isClicked=" + isClicked
				+ ", image=" + image + ", published_at=" + published_at
				+ ", tag=" + tag + ", id=" + id + ", created_at=" + created_at
				+ ", content=" + content + ", state=" + state
				+ ", comments_count=" + comments_count + ", allow_comment="
				+ allow_comment + ", user=" + user + ", votes=" + votes
				+ ", image_size=" + image_size + "]";
	}

}

UserBean

package com.qiubaiclient.model;

import java.io.Serializable;

/**
 * JSON五级数据 用户信息
 * 
 * @author xiangxm
 * 
 */
public class UserBean implements Serializable{

	/**
	 * 
	 */
	private static final long serialVersionUID = 1L;
	/**
	 * 状态标志位，暂时不知道什么用
	 */
	private String created_at;
	/**
	 * 用户使用设备发表
	 */
	private String last_device;
	/**
	 * 用户角色
	 */
	private String role;
	/**
	 * 最后访问
	 */
	private String last_visited_at;
	/**
	 * 用户活跃状态
	 */
	private String state;
	/**
	 * 登录用户名
	 */
	private String login;
	/**
	 * 用户id
	 */
	private String id;
	/**
	 * 用户头像icon名称
	 */
	private String icon;
	public String getCreated_at() {
		return created_at;
	}
	public void setCreated_at(String created_at) {
		this.created_at = created_at;
	}
	public String getLast_device() {
		return last_device;
	}
	public void setLast_device(String last_device) {
		this.last_device = last_device;
	}
	public String getRole() {
		return role;
	}
	public void setRole(String role) {
		this.role = role;
	}
	public String getLast_visited_at() {
		return last_visited_at;
	}
	public void setLast_visited_at(String last_visited_at) {
		this.last_visited_at = last_visited_at;
	}
	public String getState() {
		return state;
	}
	public void setState(String state) {
		this.state = state;
	}
	public String getLogin() {
		return login;
	}
	public void setLogin(String login) {
		this.login = login;
	}
	public String getId() {
		return id;
	}
	public void setId(String id) {
		this.id = id;
	}
	public String getIcon() {
		return icon;
	}
	public void setIcon(String icon) {
		this.icon = icon;
	}
	@Override
	public String toString() {
		return "UserBean [created_at=" + created_at + ", last_device="
				+ last_device + ", role=" + role + ", last_visited_at="
				+ last_visited_at + ", state=" + state + ", login=" + login
				+ ", id=" + id + ", icon=" + icon + "]";
	}

	

}

VotesBean

package com.qiubaiclient.model;

import java.io.Serializable;

/**
 * 点赞与不点赞的数据
 * 
 * @author xiangxm
 * 
 */
public class VotesBean implements Serializable{

	/**
	 * 
	 */
	private static final long serialVersionUID = 1L;
	/**
	 * 不点赞
	 */
	private int down;
	/**
	 * 点赞
	 */
	private int up;

	public int getDown() {
		return down;
	}

	public void setDown(int down) {
		this.down = down;
	}

	public int getUp() {
		return up;
	}

	public void setUp(int up) {
		this.up = up;
	}

	@Override
	public String toString() {
		return "VotesBean [down=" + down + ", up=" + up + "]";
	}
	
	/**
	 * 身份识别，看是up被点击了还是其他的被点击了。
	 */
	private int whoClicked = 0 ;
	
	public int getWhoClicked() {
		return whoClicked;
	}

	public void setWhoClicked(int whoClicked) {
		this.whoClicked = whoClicked;
	}

	public static final int UP_CLICKED = 0 ;
	public static final int DOWN_CLICKED = 1 ;
	public static final int SHARE_CLICKED = 2 ;
	

}

ImageSize

package com.qiubaiclient.model;

import java.io.Serializable;

/**
 * 照片尺寸
 * 
 * @author xiangxm
 * 
 */
public class ImageSize implements Serializable{

	/**
	 * 
	 */
	private static final long serialVersionUID = 1L;
	private int[] s;
	private int[] m;

	public int[] getS() {
		return s;
	}

	public void setS(int[] s) {
		this.s = s;
	}

	public int[] getM() {
		return m;
	}

	public void setM(int[] m) {
		this.m = m;
	}

}

ArticleBean

package com.qiubaiclient.model;

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

/**
 * 
 * 使用fastjson解析
 * 
 * @author xiangxm
 * 
 */
public class ArticleBean {

	private int count;
	private long total;
	private int page;
	/**
	 * items所对应的数组
	 */
	private List<ItemBean> items = new ArrayList<ItemBean>();

	public List<ItemBean> getItems() {
		return items;
	}

	public void setItems(List<ItemBean> items) {
		this.items = items;
	}

	public int getCount() {
		return count;
	}

	public void setCount(int count) {
		this.count = count;
	}

	public long getTotal() {
		return total;
	}

	public void setTotal(long total) {
		this.total = total;
	}

	public int getPage() {
		return page;
	}

	public void setPage(int page) {
		this.page = page;
	}

	@Override
	public String toString() {
		return "ArticleBean [count=" + count + ", total=" + total + ", page="
				+ page + ", items=" + items + "]";
	}

}

解析：

List<ItemBean> tempList = JSON.parseObject(responseStr,
						ArticleBean.class).getItems();