一些数据类型转换

1.String转换成HashMap:

String userinfo = HttpClientHelper.sendGet(url, params, "UTF-8");
JSONArray jsonArray = new JSONArray(userinfo);
Gson gson = new Gson();
HashMap<String, String> vos = gson.fromJson(jsonArray.get(0).toString(),
        new TypeToken<HashMap<String, String>>() {
                    }.getType());//(json形式的)String 转HashMap
User user = new User();
for (Map.Entry<String, String> entry : vos.entrySet()) {
    String key = entry.getKey();
    String value = entry.getValue();
    if (key.equals("id")) {
        user.setId(value);
    }
    if (key.equals("name")) {
        user.setCode(value);
    }
}

2.(json形式的)String转换对象：

User user = null;
 user = gson.fromJson(newob.toString(), new TypeToken<User>(){}.getType());//string转对象

3.(jsonArray形式的)String 转对象的list

List<User> user = gson.fromJson(obj.get("result").toString(),
                new TypeToken<List<User>>() {
                }.getType());//(jsonArray形式的)String 转对象的list