Gson使用

```java 

public void test(){

Hello hello = new Hello(); 

 hello.setAge("122");

 hello.setName("djsdj"); 

 hello.setSex("mail");                            

 Hello helloq = new Hello();

 hello1.setSex("hah");

 hello1.setAge("jjj");

 hello1.setName("fdf"); 

 Listlist =new ArrayList<>(); 

 list.add(hello);

 list.add(helloq);}```

1.首先去使用androidstudio 下载gson compile 'com.google.code.gson:gson:+'

2.将集合gson转换成集合 `Gson gson = new Gson(); String l=gson.toJson(list); Log.i("hashah","list ="+l); Type listType = new TypeToken>() {}.getType(); List list1 =gson.fromJson(l,listType);

              for (Hello hello2:list1){

                Log.i(",,,,,","age ="+hello2.getAge());

                }`

3.将对象和集合转换成gson

String s = JSON.toJSONString(hello);

4.将gson转换成对象

`String test ="{\"age\":\"122ewewew\",\"name\":\"djsdjewe\",\"sexwe\":\"mailwe\"}";

Hello  hello11 = JSON.parseObject(test,Hello.class);`

5.fastjson在线拉取 compile'com.alibaba:fastjson:+'