使用 @RestController 在 spring 引導中發布數據時出錯

Question

在使用 REST API 編寫 spring 引導應用程序時，我不斷收到此錯誤。

{ "status": 415, "error": "Unsupported Media Type", "message": "Content type 'text/plain' not supported" }

如何擺脫錯誤？

我的 Post Request 代碼如下，在我的

StudentController.java,

@RequestMapping(value = "/students/{studentId}/courses", method = RequestMethod.POST,
            consumes = "application/json",
            produces = {"application/json"})

public ResponseEntity<Void> registerStudentForCourse(@PathVariable String studentId, @RequestBody course newCourse) 
{

        course course1 = studentService.addCourse(studentId, newCourse);
        if (course1 == null)
            return ResponseEntity.noContent().build();
        URI location = ServletUriComponentsBuilder.fromCurrentRequest().path("/{id}").buildAndExpand(course1.getId()).toUri();
        return ResponseEntity.created(location).build();
}

我的 requestBody 的 postman 輸入如下，為學生添加新課程。 代碼在 json

{
 "name":"Microservices",
 "description"="10 Steps",
 "steps":
 [
    "Learn How to Break Things up ",
    "Automate the hell out of everything ",
    "Have fun"
 ]
}

My addcourse()方法如下：

SecureRandom random = new SecureRandom();
public course addCourse(String studentId, course cour)
{
    Student student = retrieveStudent(studentId);
    if(student==null)
    {
        return null;
    }
    String randomId = new BigInteger(130,random).toString(32);
    cour.setId(randomId);
    student.getCourses().add(cour);
    return cour;
}

Answer 1

您的端點只接受application/json但您發送text/plain 。

只需將content-type: application/json添加到您的 HTTP 請求 header 中。

Answer 2

嘗試從以下位置更改線路：

@RequestMapping(value = "/students/{studentId}/courses", method = RequestMethod.POST,
            consumes = "application/json",
            produces = {"application/json"})

至：

@RequestMapping(value = "/students/{studentId}/courses", method = RequestMethod.POST, consumes = MediaType.ALL_VALUE)