Question

我有以下Person类包含另一个Car类

public class Person {
    private String name
    private Car car;        
    ... getter and setters
}

public class Car {
    private String manufacturer;
    ... getter and setters
}

在Javascript中，我执行以下操作：

person = new Object();
person.name = "Bob";

person.car = new Object();

car = person.car;

car.manufacturer = "Mercedes";

$.ajax({
    url: 'someurl.com',
    type: 'POST',
    data: person,
    dataType: 'json',
    ...
    complete: function() {
        ...
    }
});

使用自动绑定功能时，我收到以下错误：

功能：

public @ResponseBody Car validateCar( Car car, HttpServletRequest servletRequest){
        ...
}

错误：

org.springframework.beans.InvalidPropertyException: Invalid property 'car[manufacturer]' of bean class [com.example.Person]: Property referenced in indexed property path 'car[manufacturer]' is neither an array nor a List nor a Map; returned value was []

如何使映射工作？

btw：我的POST数据如下所示：

name: Bob
car[manufacturer]: Mercedes

字符串化为JSON，它看起来如下（我测试了它，但我没有将其字符串化）

{"name":"Bob",
 "car": {
  "manufacturer":"Mercedes"
 }
}

Answer 1

似乎你传入Car hash并尝试将其自动绑定到Person对象。为此，您的哈希需要看起来像人[car [制造]]]。尝试在javascript中传入你的person对象，然后将car对象拉出自动双向对象。

Answer 2

我认为你在车上缺少@RequestBody：

public @ResponseBody Car validateCar( @RequestBody Car car, HttpServletRequest servletRequest)

嵌套对象的Spring JSON数据绑定不起作用

2 个答案: