最简单简洁高效的Json数据解析

一.无图无真相

二.主要代码

1.导入jar包

拷贝fastjson.jar包到projectlibs包下

2.封装工具类JsonUtil.java

package com.example.parsejsondemo;

import com.alibaba.fastjson.JSON;

import com.alibaba.fastjson.JSONArray;

import com.alibaba.fastjson.JSONObject;

import java.util.List;

/**

* Json解析的工具类

*

* @author 孤狼

* @since 2015-8-8

*/

public class JsonUtil {

/**

* 将JSON转成 数组类型对象

*

* @param json

* @param clazz

* @param

* @return

*/

public static List getListFromString(String json, Class clazz) {

List t = null;

try {

t = JSON.parseArray(json, clazz);

} catch (Exception e) {

e.printStackTrace();

}

return t;

}

/**

* 将list转换成String

*

* @param list

* 准备转换的集合

* @return string

* @throws Exception

*/

public static String getStringFromList(List list) {

String string = "";

try {

string = JSON.toJSONString(list, true);

} catch (Exception e) {

e.printStackTrace();

}

return string;

}

/**

* 将java对象转换成json字符串

*

* @param obj

* 准备转换的对象

* @return json字符串

* @throws Exception

*/

public static String getStringFromObject(Object obj) {

String json = "";

try {

json = JSON.toJSONString(obj, true);

} catch (Exception e) {

e.printStackTrace();

}

return json;

}

/**

* 将json字符串转换成java对象

*

* @param json

* @param clazz

* @param

* @return object

*/

public static T getObjectFromString(String json, Class clazz) {

T t = null;

try {

t = JSON.parseObject(json, clazz);

} catch (Exception e) {

e.printStackTrace();

}

return t;

}

/**

* 将 json 字符串转为 JSONArray 对象;

*

* @param json

* @return JsonArray

*/

public static JSONArray getJsonArray(String json) {

JSONArray array = null;

try {

array = JSON.parseArray(json);

} catch (Exception e) {

e.printStackTrace();

}

return array;

}

/**

* 将 json 字符串转为 JSONObect 对象

*

* @param json

* @return JSONObject

*/

public static JSONObject getJsonObject(String json) {

JSONObject object = null;

try {

object = (JSONObject) JSON.parse(json);

} catch (Exception e) {

e.printStackTrace();

}

return object;

}

}

3.封装数据实体类（实例：ArticleBean.java和ArticleDetailBean.java）

package com.example.parsejsondemo;

import java.util.ArrayList;

import java.util.List;

/**

* 文章实体类

*

* @author 孤狼

* @since 2015-8-8

*/

public class ArticleBean {

private String title = "";

private String title_image_url = "";

private String create_time = "";

private long article_id = 0;

// 查看用户的信息

private List headimages = new ArrayList();

public String getTitle() {

return title;

}

public void setTitle(String title) {

this.title = title;

}

public String getTitle_image_url() {

return title_image_url;

}

public void setTitle_image_url(String title_image_url) {

this.title_image_url = title_image_url;

}

public String getCreate_time() {

return create_time;

}

public void setCreate_time(String create_time) {

this.create_time = create_time;

}

public List getHeadimages() {

return headimages;

}

public void setHeadimages(List headimages) {

this.headimages = headimages;

}

public long getArticle_id() {

return article_id;

}

public void setArticle_id(long article_id) {

this.article_id = article_id;

}

}

package com.example.parsejsondemo;

import java.util.ArrayList;

import java.util.List;

/**

* 文章详情

*

* @author 孤狼

* @since 2015-8-8

*/

public class ArticleDetailBean {

private String content;

// 图片集合类

private List images = new ArrayList();

private String create_time;

// 点赞状态

private boolean if_dianzan;

// 评论数

private int comment_num;

// 第几期 例：第5期

private String times;

private String title;

private long article_id;

private int dianzan_num;

public String getTitle() {

return title;

}

public void setTitle(String title) {

this.title = title;

}

public String getContent() {

return content;

}

public void setContent(String content) {

this.content = content;

}

public String getCreate_time() {

return create_time;

}

public void setCreate_time(String create_time) {

this.create_time = create_time;

}

public boolean isIf_dianzan() {

return if_dianzan;

}

public void setIf_dianzan(boolean if_dianzan) {

this.if_dianzan = if_dianzan;

}

public int getComment_num() {

return comment_num;

}

public void setComment_num(int comment_num) {

this.comment_num = comment_num;

}

public String getTimes() {

return times;

}

public void setTimes(String times) {

this.times = times;

}

public long getArticle_id() {

return article_id;

}

public void setArticle_id(long article_id) {

this.article_id = article_id;

}

public int getDianzan_num() {

return dianzan_num;

}

public void setDianzan_num(int dianzan_num) {

this.dianzan_num = dianzan_num;

}

public List getImages() {

return images;

}

public void setImages(List images) {

this.images = images;

}

@Override

public String toString() {

return "ArticleDetailResult [title=" + title + ", content=" + content

+ ", create_time=" + create_time + ", comment_num="

+ comment_num + ", times=" + times + ", article_id="

+ article_id + ", dianzan_num=" + dianzan_num + "]";

}

}

4.代码中调用

a.解析 JsonList类型

package com.example.parsejsondemo;

import java.util.List;

import com.nostra13.universalimageloader.core.ImageLoader;

import android.app.Activity;

import android.content.Intent;

import android.os.Bundle;

import android.util.Log;

import android.view.Menu;

import android.view.MenuItem;

import android.view.View;

import android.view.ViewGroup;

import android.widget.AdapterView;

import android.widget.AdapterView.OnItemClickListener;

import android.widget.BaseAdapter;

import android.widget.ImageView;

import android.widget.ListView;

import android.widget.TextView;

/**

* 解析 JsonList类型

*

* @author 孤狼

* @since 2015-8-8

* */

public class JsonListActivity extends Activity {

private String data = "[ { \"article_id\": 682, \"create_time\": \"12:13\", \"headimages\": [], \"title\": \"给你的一封情书\", \"title_image_url\": \"http://e.hiphotos.baidu.com/image/w%3D310/sign=d0aa9ba85eb5c9ea62f305e2e538b622/b90e7bec54e736d1cb1f21ab9e504fc2d5626901.jpg\" }, { \"article_id\": 681, \"create_time\": \"12:13\", \"headimages\": [], \"title\": \"女人，你的别名是愚蠢\", \"title_image_url\": \"http://f.hiphotos.baidu.com/image/w%3D310/sign=ef8e5a82778b4710ce2ffbcdf3cfc3b2/72f082025aafa40f1ed46c7eae64034f78f01906.jpg\" }, { \"article_id\": 680, \"create_time\": \"12:13\", \"headimages\": [], \"title\": \"明确\", \"title_image_url\": \"http://g.hiphotos.baidu.com/image/w%3D310/sign=5c6d742fe4fe9925cb0c6f5104a95ee4/3ac79f3df8dcd100dce594cb768b4710b8122fda.jpg\" }, { \"article_id\": 679, \"create_time\": \"12:13\", \"headimages\": [], \"title\": \"秋之随想\", \"title_image_url\": \"http://d.hiphotos.baidu.com/image/w%3D310/sign=f9fd8128e9c4b7453494b117fffd1e78/0bd162d9f2d3572ce2779bdd8813632762d0c31e.jpg\" }, { \"article_id\": 681, \"create_time\": \"12:13\", \"headimages\": [], \"title\": \"女人，你的别名是愚蠢\", \"title_image_url\": \"http://f.hiphotos.baidu.com/image/w%3D310/sign=ef8e5a82778b4710ce2ffbcdf3cfc3b2/72f082025aafa40f1ed46c7eae64034f78f01906.jpg\" }, { \"article_id\": 680, \"create_time\": \"12:13\", \"headimages\": [], \"title\": \"明确\", \"title_image_url\": \"http://g.hiphotos.baidu.com/image/w%3D310/sign=5c6d742fe4fe9925cb0c6f5104a95ee4/3ac79f3df8dcd100dce594cb768b4710b8122fda.jpg\" }, { \"article_id\": 679, \"create_time\": \"12:13\", \"headimages\": [], \"title\": \"秋之随想\", \"title_image_url\": \"http://d.hiphotos.baidu.com/image/w%3D310/sign=f9fd8128e9c4b7453494b117fffd1e78/0bd162d9f2d3572ce2779bdd8813632762d0c31e.jpg\" }, { \"article_id\": 681, \"create_time\": \"12:13\", \"headimages\": [], \"title\": \"女人，你的别名是愚蠢\", \"title_image_url\": \"http://f.hiphotos.baidu.com/image/w%3D310/sign=ef8e5a82778b4710ce2ffbcdf3cfc3b2/72f082025aafa40f1ed46c7eae64034f78f01906.jpg\" }, { \"article_id\": 680, \"create_time\": \"12:13\", \"headimages\": [], \"title\": \"明确\", \"title_image_url\": \"http://g.hiphotos.baidu.com/image/w%3D310/sign=5c6d742fe4fe9925cb0c6f5104a95ee4/3ac79f3df8dcd100dce594cb768b4710b8122fda.jpg\" }, { \"article_id\": 679, \"create_time\": \"12:13\", \"headimages\": [], \"title\": \"秋之随想\", \"title_image_url\": \"http://d.hiphotos.baidu.com/image/w%3D310/sign=f9fd8128e9c4b7453494b117fffd1e78/0bd162d9f2d3572ce2779bdd8813632762d0c31e.jpg\" }, { \"article_id\": 681, \"create_time\": \"12:13\", \"headimages\": [], \"title\": \"女人。你的别名是愚蠢\", \"title_image_url\": \"http://f.hiphotos.baidu.com/image/w%3D310/sign=ef8e5a82778b4710ce2ffbcdf3cfc3b2/72f082025aafa40f1ed46c7eae64034f78f01906.jpg\" }, { \"article_id\": 680, \"create_time\": \"12:13\", \"headimages\": [], \"title\": \"明确\", \"title_image_url\": \"http://g.hiphotos.baidu.com/image/w%3D310/sign=5c6d742fe4fe9925cb0c6f5104a95ee4/3ac79f3df8dcd100dce594cb768b4710b8122fda.jpg\" }, { \"article_id\": 679, \"create_time\": \"12:13\", \"headimages\": [], \"title\": \"秋之随想\", \"title_image_url\": \"http://d.hiphotos.baidu.com/image/w%3D310/sign=f9fd8128e9c4b7453494b117fffd1e78/0bd162d9f2d3572ce2779bdd8813632762d0c31e.jpg\" } ]";

private List list;

private ListView listView;

private ImageLoader instance;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

instance = ImageLoader.getInstance();

listView = (ListView) findViewById(R.id.listView);

// 把String类型的json解析成List集合

list = JsonUtil.getListFromString(data, ArticleBean.class);

// 设置适配器

listView.setAdapter(new CustomAdapter());

listView.setOnItemClickListener(new OnItemClickListener() {

@Override

public void onItemClick(AdapterView parent, View view,

int position, long id) {

startActivity(new Intent(JsonListActivity.this,

JsonObjectActivity.class));

}

});

}

// 定义适配器

class CustomAdapter extends BaseAdapter {

@Override

public int getCount() {

return list.size();

}

@Override

public Object getItem(int position) {

return list.get(position);

}

@Override

public long getItemId(int position) {

return position;

}

@Override

public View getView(int position, View convertView, ViewGroup parent) {

// 查找控件

ViewHold hold;

if (convertView != null) {

hold = (ViewHold) convertView.getTag();

} else {

hold = new ViewHold();

convertView = View.inflate(getApplicationContext(),

R.layout.list_item, null);

hold.iv_cover = (ImageView) convertView

.findViewById(R.id.iv_coner);

hold.tv_time = (TextView) convertView

.findViewById(R.id.tv_time);

hold.tv_title = (TextView) convertView

.findViewById(R.id.tv_title);

convertView.setTag(hold);

}

// 填充数据

hold.tv_time.setText("孤狼 公布时间:"

+ list.get(position).getCreate_time());

hold.tv_title.setText(list.get(position).getTitle());

instance.displayImage(list.get(position).getTitle_image_url(),

hold.iv_cover);

return convertView;

}

class ViewHold {

private ImageView iv_cover;

private TextView tv_title;

private TextView tv_time;

}

}

}

b.解析 JsonObject类型

package com.example.parsejsondemo;

import com.nostra13.universalimageloader.core.ImageLoader;

import android.app.Activity;

import android.os.Bundle;

import android.widget.ImageView;

import android.widget.TextView;

/**

* 解析 JsonObject类型

*

* @author 孤狼

* @since 2015-8-8

* */

public class JsonObjectActivity extends Activity {

// json数据

private String data = "{ \"article_id\": 682, \"comment_num\": 26, \"content\": \"你是清晨，\\r\\n是我醒来后的第一缕，\\r\\n是我起床后的第一缕清风。\\r\\n是我看见的第一抹浓绿色。\\r\\n你是的阳光温暖我的。\\r\\n你是中午，\\r\\n是手中香甜的饭菜。\\r\\n是我午睡时躺着的枕头。\\r\\n你是晚上，\\r\\n是黑中的一屡凉爽，\\r\\n是黑暗中的平静心态，\\r\\n是惊恐中的心灵安慰。\\r\\n是天空中的闪烁繁星，\\r\\n你是我最遥远的。\\r\\n我的恋人。\\r\\n\", \"create_time\": \"06-12 12:13\", \"dianzan_num\": 411, \"if_dianzan\": true, \"images\": [ { \"image_id\": 3595, \"image_url\": \"http://e.hiphotos.baidu.com/image/w%3D310/sign=d0aa9ba85eb5c9ea62f305e2e538b622/b90e7bec54e736d1cb1f21ab9e504fc2d5626901.jpg\" }, { \"image_id\": 3596, \"image_url\": \"http://7xjora.com2.z0.glb.qiniucdn.com/644121332662Etjmn.jpg?imageView2/0/w/500/h/500\" }, { \"image_id\": 3597, \"image_url\": \"http://7xjora.com2.z0.glb.qiniucdn.com/1650121333675aY09a.jpg?imageView2/0/w/500/h/500\" }, { \"image_id\": 3598, \"image_url\": \"http://7xjora.com2.z0.glb.qiniucdn.com/120712133440245oBv.jpg?imageView2/0/w/500/h/500\" }, { \"image_id\": 3599, \"image_url\": \"http://7xjora.com2.z0.glb.qiniucdn.com/940121334941gy1Ii.jpg?imageView2/0/w/500/h/500\" } ], \"times\": \"第682期\", \"title\": \"给你的一封情书\" }";

private ImageLoader instance;

private TextView tv_title;

private TextView tv_time;

private ImageView iv_cover;

private ArticleDetailBean detailBean;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_object);

instance = ImageLoader.getInstance();

iv_cover = (ImageView) findViewById(R.id.iv_coner);

tv_time = (TextView) findViewById(R.id.tv_time);

tv_title = (TextView) findViewById(R.id.tv_title);

// 把json数据解析成Object类型实体类

detailBean = JsonUtil

.getObjectFromString(data, ArticleDetailBean.class);

// 填充数据

tv_title.setText(detailBean.getTitle());

tv_time.setText(detailBean.getContent());

instance.displayImage(detailBean.getImages().get(0).getImage_url(),

iv_cover);

}

}

三.说明

Json数据是client和服务端交互的主要形式之中的一个，解析Json的方法工具也非常多，比方goole的Gson（能够去看前面关于Gson解析数据的方法）等等，而fastjson.jar解析json数据感觉非常强大高效和简洁。有用非常easy：引入jar包—>封装工具类—–>封装要解析的数据对象—>调用工具解析。代码非常easy。如有疑问请留言—-孤狼

四.实例Demo

最简单高效简洁好用的Json解析

好文阅读