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 <T>

     * @return

     */

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

        List<T> 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 <T>

     * @return object

     */

    public static <T> T getObjectFromString(String json, Class<T> 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<UserInfoBean> headimages = new ArrayList<UserInfoBean>();

    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<UserInfoBean> getHeadimages() {

        return headimages;

    }

    public void setHeadimages(List<UserInfoBean> 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<ImageResult> images = new ArrayList<ImageResult>();

    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<ImageResult> getImages() {

        return images;

    }

    public void setImages(List<ImageResult> 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<ArticleBean> 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

巴特西

最简单简洁高效的Json数据解析

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