Bdtjtk

I am a beginner in Spring Boot and learning my way through.

How to fix 'HTTP-415' error, during POST request in REST web service using Spring Boot as below? I have tried @RequestMapping annotation, @RequestParam. @RequestParam gives some other error 401. However, 415 is consistent with @RequestMapping and @PostMapping.

Issue with @PostMapping request.

{

    "timestamp": "2018-12-31T18:29:36.727+0000",

    "status": 415,

    "error": "Unsupported Media Type",

    "message": "Content type 'text/plain;charset=UTF-8' not supported",

    "trace": "org.springframework.web.HttpMediaTypeNotSupportedException: Content type 

    'text/plain;charset=UTF-8' not supportedrntat 

    org.springframework.web.servlet.mvc.method.annotation.

    AbstractMessageConverterMethodArgumentResolver.

    readWithMessageConverters

    (AbstractMessageConverterMethodArgumentResolver.java:224)rntat 

     org.springframework.web.servlet.mvc.method.annotation.

     RequestResponseBodyMethodProcessor.

     readWithMessageConverters(RequestResponseBodyMethodProcessor.java:157)

     rntat org.springframework.web.servlet.mvc.method.

     annotation.RequestResponseBodyMethodProcessor.

     resolveArgument(RequestResponseBodyMethodProcessor.java:130)

     rntat...................

While placing following request:

StudentController.java

@RestController

public class StudentController {

    @Autowired

    private StudentService studentService;

    :

    :



    @PostMapping("/students/{studentId}/courses")

    public ResponseEntity<Void> registerStudentForCourse(

            @PathVariable String studentId,

            @RequestBody Course newCourse) {

        Course course = studentService.addCourse(studentId, newCourse);



        if (course == null)

            return ResponseEntity.noContent().build();



        URI location = ServletUriComponentsBuilder.fromCurrentRequest().

                path("/{id}").buildAndExpand(course.getId()).toUri();



        return ResponseEntity.created(location).build();

    }

StudentService.java

@Component

public class StudentService {

    :

    :

    public Course addCourse(String studentId, Course course) {

        Student student = retrieveStudent(studentId);



        if (student == null) {

            return null;

        }



        String randomId = new BigInteger(130, random).toString(32);

        course.setId(randomId);



        student.getCourses().put(course.getId(), course);



        return course;

    }

pom.xml

<?xml version="1.0" encoding="UTF-8"?>

<project xmlns="http://maven.apache.org/POM/4.0.0" 

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 

http://maven.apache.org/xsd/maven-4.0.0.xsd">

<modelVersion>4.0.0</modelVersion>

<parent>

   <groupId>org.springframework.boot</groupId>

   <artifactId>spring-boot-starter-parent</artifactId>

   <version>2.1.1.RELEASE</version>

   <relativePath/> <!-- lookup parent from repository -->

 </parent>

 <groupId>com.in28minutes.springboot</groupId>

 <artifactId>student-services</artifactId>

 <version>0.0.1-SNAPSHOT</version>

 <name>student-services</name>

 <description>Demo project for Spring Boot</description>

 <properties>

  <java.version>1.8</java.version>

 </properties>

 <dependencies>

  <dependency>

    <groupId>org.springframework.boot</groupId>

    <artifactId>spring-boot-starter-actuator</artifactId>

  </dependency>

  <dependency>

    <groupId>org.springframework.boot</groupId>

    <artifactId>spring-boot-starter-web</artifactId>

  </dependency>

  <dependency>

    <groupId>org.springframework.boot</groupId>

    <artifactId>spring-boot-devtools</artifactId>

    <scope>runtime</scope>

  </dependency>

  <dependency>

    <groupId>org.springframework.boot</groupId>

    <artifactId>spring-boot-starter-test</artifactId>

    <scope>test</scope>

  </dependency>

</dependencies>

<build>

 <plugins>

     <plugin>

        <groupId>org.springframework.boot</groupId>

        <artifactId>spring-boot-maven-plugin</artifactId>

    </plugin>

 </plugins>

 </build>

</project>

it's clearly in postman you are sending information as form-urlencoded but in your controller, you are expecting a request body (e. json), so you need either change @RequestBody to @ModleAtrributes or send you information with header Content-type: application/json

Issue is Fixed by adding content header as application/json