androis gson

最新推荐文章于 2025-02-06 01:30:38 发布

jingle_nie

最新推荐文章于 2025-02-06 01:30:38 发布

阅读量740

点赞数

分类专栏：【Android 基础】文章标签： gson json

本文链接：https://blog.youkuaiyun.com/niejing654092427/article/details/39435291

版权

【Android 基础】专栏收录该内容

22 篇文章

订阅专栏

使用gson解析json,就得 json有一定的格式，要么是一个[]，要么是一个{}

若是{},{},{} 外面又没有套[]，应该算格式不合理吧。

下面用个例子，简单的介绍gson如何解析json,仅使用~

先发两个json 内容

1、最外层是{}

{
  "resp":"ok",
  "result": {
    "date": "2013-4-19 16:55:58",
    "focus": 
      [
        {
          "title": "标题",
          "summary": "简介",
          "url": "http://www.ceshi.com"
        },
        {
          "title": "标题22",
          "summary": "简介22",
          "url": "http://www.ceshi22.com"
        }
      ],
    
    "items": [
        {
          "name": "名称",
          "id": "11",
          "price": "88.88"
        },
        {
          "name": "名称22",
          "id": "22",
          "price": "100"
        }
      ]
    
  }
}

2、外层是[]

 [
  {
    "name": "zeng", 
    "age": "22", 
    "addr": "北京"
  }, 
  {
    "name": "zhang", 
    "age": "20", 
    "addr": "上海"
  }, 
  {
    "name": "wang", 
    "age": "25", 
    "addr": "深圳"
  }
]

使用Gson,解析，关键的就是定义好类对象！

先｛｝的类

Bean.java

public class Bean {
//	@SerializedName("resp")
//	private String respone;//假如变量命名与解析数据不同，则加上@SerializedName("")
	private String resp;
	private Result result;
	<pre name="code" class="java">        //....下面省略 set ,get

Result.java

public class Result {

	private String date;
	private List<FocusItem> focus;
	private List<Item> items;

FocusItem.java

public class FocusItem {

	private String title;
	private String summary;
	private String url;

Item.java

public class Item {
	
	private String name;
	private int id;
	private float price;

下面的是[] 测试数组格式定义的一个的类

Info.java

public class Info {

	private String name;
	private int age;
	private String addr;

解析代码，一个最外层是{} 一个是[]

	private void parse() {
		Gson gson = new Gson();
		switch (type) {
		case OBJ:
			Bean fromJson = gson.fromJson(readContext, Bean.class);
			System.out.println(fromJson.toString());
			break;
		case ARR:
			Type type = new TypeToken<List<Info>>() {}.getType();
			Object fromJson2 = gson.fromJson(readContext, type);
			List<Info> list = (List<Info>) fromJson2;