Spring JSON请求体未映射到Java POJO

Question

我正在使用Spring来实现RESTful Web服务.其中一个端点将JSON字符串作为请求体,我希望将其映射到POJO.但是,现在似乎传入的JSON字符串不是映射到POJO的属性.

这是@RestController接口

@RequestMapping(value="/send", headers="Accept=application/json", method=RequestMethod.POST)
public void sendEmails(@RequestBody CustomerInfo customerInfo);

数据模型

public class CustomerInfo {
    private String firstname;
    private String lastname; 
    public CustomerInfo() {
        this.firstname = "first";
        this.lastname = "last";
    }

    public CustomerInfo(String firstname, String lastname)
    {
        this.firstname = firstname;
        this.lastname = lastname;
    }

    public String getFirstname(){
        return firstname;
    }

    public void setFirstname(String firstname){
        this.firstname = firstname;
    }

    public String getLastname(){
        return lastname;
    }

    public void getLastname(String lastname){
        this.lastname = lastname;
    }
}

最后我的POST请求:

{"CustomerInfo":{"firstname":"xyz","lastname":"XYZ"}}

Content-Type指定为application/json

但是,当我打印出对象值时,默认值("first"和"last")被打印出来而不是我传入的值("xyz"和"XYZ")

有谁知道为什么我没有得到我预期的结果？

固定

事实证明,请求体的值没有传入,因为我不仅需要在我的界面中使用@RequestBody注释,而且还需要实际的方法实现.有了这个,问题就解决了.

Answer 1

事实证明,请求体的值没有传入,因为我不仅需要在我的界面中使用@RequestBody注释,而且还需要实际的方法实现.有了这个,问题就解决了.

Answer 2

您可以通过多种方式进行操作，在这里，我将以以下不同的方式进行操作：

NOTE: 请求数据应为{“ customerInfo”：{“ firstname”：“ xyz”，“ lastname”：“ XYZ”}}

1st way 我们可以将上述数据绑定到地图，如下所示

@RequestMapping(value = "/send", headers = "Accept=application/json", method = RequestMethod.POST)
public void sendEmails(@RequestBody HashMap<String, HashMap<String, String>> requestData) {

    HashMap<String, String> customerInfo = requestData.get("customerInfo");
    String firstname = customerInfo.get("firstname");
    String lastname = customerInfo.get("lastname");
    //TODO now do whatever you want to do.
}

2nd way 我们可以直接将它绑定到pojo

step 1 创建dto类 UserInfo.java

public class UserInfo {
    private CustomerInfo customerInfo1;

    public CustomerInfo getCustomerInfo1() {
        return customerInfo1;
    }

    public void setCustomerInfo1(CustomerInfo customerInfo1) {
        this.customerInfo1 = customerInfo1;
    }
}

step 1. 创建另一个dto类CustomerInfo.java

class CustomerInfo {
        private String firstname;
        private String lastname;

        public String getFirstname() {
            return firstname;
        }

        public void setFirstname(String firstname) {
            this.firstname = firstname;
        }

        public String getLastname() {
            return lastname;
        }

        public void setLastname(String lastname) {
            this.lastname = lastname;
        }
    }

step 3 将请求正文数据绑定到pojo

 @RequestMapping(value = "/send", headers = "Accept=application/json", method = RequestMethod.POST)
    public void sendEmails(@RequestBody UserInfo userInfo) {

        //TODO now do whatever want to do with dto object
    }

希望对您有所帮助。谢谢