Javascript 将模型从ajax调用传递到spring控制器

我读了很多文章描述这一点，我试图使用相同的机制，但它仍然不适合我

因此，我想将对象从javascript发送到我的控制器

我的bean如下：（StudentAnswers.java）

我的具有ajax调用的javascript文件是：

function submitTest()
{
    var test_id = 1;
    var student_id = 1;
    var q = [];
    q[0] = "question 1";
    q[1] = "question 2";
    var a = [];
    a[0] = "answer 1";
    a[1] = "answer 2";
    var studentAnswers = {
           "testId": test_id,
           "studentId": student_id,
           "questionIds": q,
           "answerIds" : a
        };    

    $.ajax({
    type : "POST",
    url : "submitTest",
    headers: { 
        'Accept': 'application/json',
        'Content-Type': 'application/json' 
    },
    data : studentAnswers,
    success : function(response) {
       alert('test submitted');
    },
    error : function(e) {
       alert('Error: ' + e);
    }
});

最后，我的控制器功能是：

@RequestMapping(value={"submitTest"},method = RequestMethod.POST)
public ModelAndView submitTest(@RequestBody StudentAnswers studentAnswers)
{
    ...
    return new ModelAndView("student/testBegin");
}

---

尝试将数据字符串化，如下所示：

data : JSON.stringify(studentAnswers)

---

谢谢你们的帮助。 我尝试使用JSON.stringify将数据从AJAX发送到Controller，但没有成功

JSON.stringify（studentAnswers）

但是，当我查看正在发送的数据并与预期的数据类型进行比较时，我发现存在类型不匹配。 因此，我将javascript对象更改为与bean相同。下面是我的对象和bean，它工作得很好

JavaScript对象：

var studentAnswers  = new Object();
studentAnswers.testId = 1;
studentAnswers.studentId = 1; 
studentAnswers.questionIds =  new Array();
studentAnswers.questionIds[0] = "12345";
studentAnswers.answerIds =new Array();
studentAnswers.answerIds[0] = "12345";

public class StudentAnswers {
    private Integer testId;
    private Integer studentId;
    private String[] questionIds;
    private String[] answerIds;
..
//all get and set method to access this
}

@RequestMapping(value={"submitTest"},method = RequestMethod.POST)
public ModelAndView submitTest(@RequestBody StudentAnswers studentAnswers)
{
    System.out.println(studentAnswers.toString());
    return new ModelAndView("student/testBegin");
}

Bean:

var studentAnswers  = new Object();
studentAnswers.testId = 1;
studentAnswers.studentId = 1; 
studentAnswers.questionIds =  new Array();
studentAnswers.questionIds[0] = "12345";
studentAnswers.answerIds =new Array();
studentAnswers.answerIds[0] = "12345";

public class StudentAnswers {
    private Integer testId;
    private Integer studentId;
    private String[] questionIds;
    private String[] answerIds;
..
//all get and set method to access this
}

@RequestMapping(value={"submitTest"},method = RequestMethod.POST)
public ModelAndView submitTest(@RequestBody StudentAnswers studentAnswers)
{
    System.out.println(studentAnswers.toString());
    return new ModelAndView("student/testBegin");
}

最后的AJAX调用如下所示：

$.ajax({
    type : "POST",
    url : "submitTest",
    dataType: "json",
    headers: { 
        'Accept': 'application/json',
        'Content-Type': 'application/json' 
    },
    data : JSON.stringify(studentAnswers),
    success : function(response) {
       alert('test submitted');
    },
    error : function(e) {
       alert(e.message);   
    }
}); 

控制器功能：

var studentAnswers  = new Object();
studentAnswers.testId = 1;
studentAnswers.studentId = 1; 
studentAnswers.questionIds =  new Array();
studentAnswers.questionIds[0] = "12345";
studentAnswers.answerIds =new Array();
studentAnswers.answerIds[0] = "12345";

public class StudentAnswers {
    private Integer testId;
    private Integer studentId;
    private String[] questionIds;
    private String[] answerIds;
..
//all get and set method to access this
}

@RequestMapping(value={"submitTest"},method = RequestMethod.POST)
public ModelAndView submitTest(@RequestBody StudentAnswers studentAnswers)
{
    System.out.println(studentAnswers.toString());
    return new ModelAndView("student/testBegin");
}

---

我尝试了此操作，但收到了错误消息：“加载资源失败：服务器响应状态为400（错误请求）”我尝试了此操作，但收到了错误消息：“加载资源失败：服务器响应状态为400（错误请求）”