android JSON文件解析为类对象 出现以下错误，求解答。

Posted 2023-03-25

Caused by: java.lang.IllegalStateException: Expected BEGIN_OBJECT but was STRING at line 1 column 123
JSON文件：

"Data":
"uid": 19880890,
"token": "d8dc52ba46e84685ab5549c01764dd9b",
"name": "[e-mail]"
,
"Detail": "登入成功",
"Return": "0"

类对象
public class LoginData
public Data Data;
public String Detail;
public string Return;

public static class Data

public String name;
private String token;
public int uid;



解析语句：
LoginData loginData = json.fromJson(jsonData, LoginData.class);

jsonDate就是获得的JSON文件内容
public string Return;改为char型就OK了。

　　用Gson解析json数据是可以的, 如果你非要把解析对象写成类嵌套的形式,就必须要参考gson的用户指南.这是截图:

　　:最好的办法是不要用类嵌套. 直接写两个类接即可

　　public class LoginData
        public Data Data;
        public String Detail;
        public string Return;

    
   
    public static class Data

        public String name;
        private String token;
        public int uid;

    

参考技术A 你要定义类的get和set方法，然后属性名字要用小写，其次return不要用，这是java关键字

public class LoginData
private Data data;
private String detail;
private String retur;
public Data getData()
return data;

public void setData(Data data)
this.data = data;

public String getDetail()
return detail;

public void setDetail(String detail)
this.detail = detail;

public String getRetur()
return retur;

public void setRetur(String retur)
this.retur = retur;



public class Data
private int uid;
private String name;
private String token;

public String getName()
return name;

public void setName(String name)
this.name = name;

public String getToken()
return token;

public void setToken(String token)
this.token = token;

public int getUid()
return uid;

public void setUid(int uid)
this.uid = uid;




测试类
public class Test
public static void main(String[] args)
String json="\"data\":\"uid\":19880890,\"token\":\"d8dc52ba46e84685ab5549c01764dd9b\",\"name\": \"[e-mail]\", \"detail\": \"登入成功\",\"retur\": \"0\"";
JSONObject object = JSONObject.fromObject(json);
Map<String, Class> classMap = new HashMap<String, Class>();
classMap.put("data", Data.class);
LoginData loginData = (LoginData) JSONObject.toBean(object, LoginData.class,classMap);

System.err.println(loginData.getData().getName());