JSON数据转换

用到的开源项目：https://github.com/google/gson

news类：

package com.example.jsondemo.domain;

public class News {
    private int id;

    private String title;
    private String desc;
    private String content;

    public int getId() {
        return id;
    }

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

    public String getTitle() {
        return title;
    }

    public void setTitle(String title) {
        this.title = title;
    }

    public String getDesc() {
        return desc;
    }

    public void setDesc(String desc) {
        this.desc = desc;
    }

    public String getContent() {
        return content;
    }

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

    public News(int id, String title, String desc, String content) {
        super();
        this.id = id;
        this.title = title;
        this.desc = desc;
        this.content = content;
    }

    public News() {
    }

    public News(String title, String desc, String content) {
        super();
        this.title = title;
        this.desc = desc;
        this.content = content;
    }

}

把对象转换成json：

private String objToJson() {
        News news = new News(1000, "标题", "副标题", "主体");
        String gString = g.toJson(news);
        Log.i("GSON", gString);
        return gString;
    }

json内容：就是字符串

{"content":"主体","desc":"副标题","title":"标题","id":1000}

json转成对象：

private News jsonToObj(String json) {
        Log.i("GSON", "json to obj");
        News news = g.fromJson(json, News.class);
        Log.i("GSON", news.toString());
        return news;
    }

list集合==>json：

private String listToJson() {
        List<News> list = new ArrayList<News>();
        list.add(new News(10001, "标题1", "副标题1", "主体1"));
        list.add(new News(100012, "标题12", "副标题12", "主体12"));
        list.add(new News(100013, "标题13", "副标题13", "主体13"));
        list.add(new News(100014, "标题14", "副标题14", "主体14"));
        list.add(new News(100015, "标题15", "副标题15", "主体15"));
        String gList = g.toJson(list);
        Log.i("GSON", gList);
        return gList;
    }

json==>集合List：

private List<News> jsonToList(String json) {
        // import java.lang.reflect.Type;
        Type type = new TypeToken<List<News>>() {
        }.getType();
        List<News> list = g.fromJson(json, type);
        for (News news : list) {
            Log.i("GSON", news.getTitle() + news.getDesc());
        }
        return list;
    }

项目地址：

https://github.com/amorypepelu/JsonDemo