GSON JSON

实体类Javabean必须要有无参构造，否则报错

 

String s = req.getParameter("pakage");

s = URLDecoder.decode(s,"utf-8");
System.out.println(s);



JSONArray jsonArray = JSONArray.fromObject(s);

List list = (List) jsonArray.toCollection(jsonArray,User.class);

Iterator it = list.iterator();

while(it.hasNext())
{
User user = (User) it.next();
System.out.println(user.getName());
}

--------------------------------------------------------

//这种好用

String s = req.getParameter("pakage");
s = URLDecoder.decode(s,"utf-8");
System.out.println(s);
JSONArray jsonArray = JSONArray.fromObject(s);　　　　//将字符串 专程JSON数组
ArrayList<User> list = new ArrayList<User>();

for (int i = 0; i < jsonArray.size(); i++) {
　　　　　　　　　　　　　　　　　　　　　　　　　　　　数组遍历

JSONObject jsonObject = (JSONObject) jsonArray.get(i);  这两行就是单个对象转换

list.add((User)JSONObject.toBean(jsonObject, User.class));

}