對象映射器值返回空

Question

我正在使用Ajax使用jQuery將數據發送到Spring MVC的發佈請求。其中兩個值是String數據類型，而另外兩個值是int。我得到以下錯誤：Can not instantiate variable of type.....From Integral number...

我收到我從客戶端發送到我的服務器端Java代碼的數據，但對象映射器的值爲空（即personid = om.readValue(id, MyClass.class);）而那些相同的行是錯誤指向。將Map<String,String>更改爲Map<String, Object>也不起作用。

以下是我的代碼。任何幫助將不勝感激。

JSON：

{ 
    id:"35", 
    firstname : "John", 
    lastname : "Doe", 
    age: "40" 

} 

控制器：

@RequestMapping(value="/mywebservice", method = RequestMethod.POST) 
public Object getPerson(@RequestBody Map<String, String> mydata){ 

MyClass personid = null; 
MyClass fname = null; 
MyClass lname = null; 
MyClass personage = null; 

String id = ""; 
String firstname = ""; 
String lastname = ""; 
String age = ""; 
ObjectMapper om = new ObjectMapper(); 

if(mydata.containsKey("id"){ 
    id = mydata.get("id"); 
} 
if(mydata.containsKey("firstname"){ 
    firstname = mydata.get("firstname"); 
} 

if(mydata.containsKey("lastname"){ 
    lastname = mydata.get("lastname"); 
} 

if(mydata.containsKey("age"){ 
    age = mydata.get("age"); 
} 

try{ 
personid = om.readValue(id, MyClass.class); 
fname = om.readValue(firstname, MyClass.class); 
lname = om.readValue(lastname, MyClass.class); 
personage = om.readValue(age, MyClass.class); 
}catch(Exception e){ ...} 

    return helperClass(personid, fname, lname, personage); 

} 

助手類：

public Object getFirstName(MyClass personid, MyClass fname, MyClass lname, MyClass personage){ 

    return addName(personid, fname, lname, personage); 

} 

型號：

@JsonProperty("id") 
    private int childid; 

@JsonProperty("firstname") 
private String firstname; 

@JsonProperty("lastname") 
private String lastname; 

@JsonProperty("age") 
private int childage; 

Answer 1

請嘗試更改json？

{ 
    id:35, 
    firstname : "John", 
    lastname : "Doe", 
    age: 40 

}