ajax POST + spring控制器参数传递错误

Question

我在将 POST 请求中的 Int 参数传递给 Spring MVC 控制器时遇到了奇怪的问题。

问题是一个参数通过POST传递，但没有被控制器解析。

代码如下： 弹簧控制器：

@Controller
@RequestMapping("user")
public class UserController {
    @RequestMapping(value = "/register", method = RequestMethod.POST)
    @ResponseBody
    public JsonResponse AddUser(@RequestBody User user){
        System.out.println(user.getCondoID());
        System.out.println(user.getPassword());
        System.out.println(user.getUsername());

        *** SOME MY STUFF ***
}

用户模型：

public class User {
    private String username;
    private String password;
    private int condo_id;
    private List<String> roles;

    public List<String> getRoles() {
        return roles;
    }
    public void setRoles(List<String> roles) {
        this.roles = roles;
    }

    public String getUsername() {
        return username;
    }
    public void setUsername(String username) {
        this.username = username;
    }

    public String getPassword() {
        return password;
    }
    public void setPassword(String password) {
        this.password = password;
    }

    public int getCondoID() {
        return condo_id;
    }
    public void setCondoID(int condo_id) {
        this.condo_id = condo_id;
    }
}

我如何在 Angular 中发送 POST（示例）：

$scope.choosenCondo.id = "7";
var formData = {
    "username" : $scope.registerUser.email,
    "password" : $scope.registerUser.password,
    "condo_id" : parseInt($scope.choosenCondo.id)
};

var req = {
    method: 'POST',
    url: '/api/user/register',
    headers: {
        'X-CSRF-TOKEN': $('input[name="_csrf"]').val(),
        'Upgrade-Insecure-Requests': "1",
        //'Content-Type': "application/x-www-form-urlencoded"
        'Content-Type': 'application/json'
    },
    data: formData
}

$http(req)

所以，对于System.out.println(user.getCondoID());，我在日志中收到“0”。 但是 POST 数据看起来像这样，例如：{"username":"4t654y54y54y","password":"1q2w3e","condo_id":2} 所以参数是在 POST 中发送的。造成这种麻烦的原因是什么？

Answer 1

你的用户模型应该是这样的

public class User {
    private String username;
    private String password;
    private int condo_id;
    private List<String> roles;

    public List<String> getRoles() {
        return roles;
    }
    public void setRoles(List<String> roles) {
        this.roles = roles;
    }

    public String getUsername() {
        return username;
    }
    public void setUsername(String username) {
        this.username = username;
    }

    public String getPassword() {
        return password;
    }
    public void setPassword(String password) {
        this.password = password;
    }

    public int getCondo_id() {
        return condo_id;
    }

    public void setCondo_id(int condo_id) {
        this.condo_id = condo_id;
    }

    /*
    public int getCondoID() {
        return condo_id;
    }
    public void setCondoID(int condo_id) {
        this.condo_id = condo_id;
    }
    */
}

没有找到真正的setter方法来设置属性“condo_id”的值。

So, for System.out.println(user.getCondoID()); i receive "0" in log. 

由于java性质，原始值默认初始化为0，所以打印的是0