生成Json字符串Gson gson = new Gson();List
     
       persons = new ArrayList
      
       ();for (int i = 0; i < 10; i++) {     Person p = new Person();     p.setName("name" + i);     p.setAge(i * 5);     persons.add(p);}String str = gson.toJson(persons);
      
     

json 转对象

Person person = gson.fromJson(str, Person.class);

json 转list  泛型：

List
     
       ps = gson.fromJson(str, new TypeToken
      
       
        >(){}.getType());for(int i = 0; i < ps.size() ; i++){     Person p = ps.get(i);     System.out.println(p.toString());}