Java 带restful服务的Spring boot

我是新来的

Spring boot

我正在尝试编写一个使用post请求作为输入的代码

当我试图通过post rest客户端chrome插件发送post请求时，我遇到了这个错误

我正在使用Maven构建工具

{
    "timestamp": 1431079188726,
    "status": 415,
    "error": "Unsupported Media Type",
    "exception": "org.springframework.web.HttpMediaTypeNotSupportedException",
    "message": "Content type 'text/plain;charset=UTF-8' not supported",
    "path": "/api/greetings" }

这些是课程

Application.java

@SpringBootApplication
@ComponentScan(basePackages="webapi")
public class Application {


    public static void main(String[] args) throws Exception{
        SpringApplication.run(Application.class, args);

    }

}

public class Greeting {

    private BigInteger id;
    private String text;

    public Greeting() {

    }

    public BigInteger getId() {
        return id;
    }

    public void setId(BigInteger id) {
        this.id = id;
    }

    public String getText() {
        return text;
    }

    public void setText(String text) {
        this.text = text;
    }

}

@RestController

public class GreetingController {



    private static BigInteger nextId;
    private static Map<BigInteger, Greeting> greetingMap;


    private static Greeting save(Greeting greeting) {
        if (greetingMap == null) {
            greetingMap = new HashMap<BigInteger, Greeting>();
            nextId = BigInteger.ONE;

        }
        greeting.setId(nextId);
        nextId = nextId.add(BigInteger.ONE);
        greetingMap.put(greeting.getId(), greeting);
        return greeting;
    }

    static {
        Greeting g1 = new Greeting();
        g1.setText("Hello World");
        save(g1);

        Greeting g2 = new Greeting();
        g2.setText("Hola Mundo!");
        save(g2);

    }



    @RequestMapping(value = "/api/greetings", method = RequestMethod.GET, produces = MediaType.APPLICATION_JSON_VALUE)

    public ResponseEntity<Collection<Greeting>> getGreetings() {
        Collection<Greeting> greetings = greetingMap.values();

        return new ResponseEntity<Collection<Greeting>>(greetings,
                HttpStatus.OK);
    }


    @RequestMapping(value = "/api/greetings/{id}", method = RequestMethod.GET, produces = MediaType.APPLICATION_JSON_VALUE)

    public ResponseEntity<Greeting> getGreeting(
            @PathVariable("id") BigInteger id)
    {
        Greeting greeting = greetingMap.get(id);
        if (greeting == null) {
            return new ResponseEntity<Greeting>(HttpStatus.NOT_FOUND);
        }
        return new ResponseEntity<Greeting>(greeting, HttpStatus.OK);

    }


    @RequestMapping(value = "/api/greetings", method = RequestMethod.POST, consumes = MediaType.APPLICATION_JSON_VALUE, produces = MediaType.APPLICATION_JSON_VALUE)
    @ResponseBody
    public ResponseEntity<Greeting> createGreeting(
            @RequestBody Greeting greeting) {
        Greeting savedGreeting = save(greeting);
        return new ResponseEntity<Greeting>(savedGreeting, HttpStatus.CREATED);
    }

}

Greeting.java

@SpringBootApplication
@ComponentScan(basePackages="webapi")
public class Application {


    public static void main(String[] args) throws Exception{
        SpringApplication.run(Application.class, args);

    }

}

public class Greeting {

    private BigInteger id;
    private String text;

    public Greeting() {

    }

    public BigInteger getId() {
        return id;
    }

    public void setId(BigInteger id) {
        this.id = id;
    }

    public String getText() {
        return text;
    }

    public void setText(String text) {
        this.text = text;
    }

}

@RestController

public class GreetingController {



    private static BigInteger nextId;
    private static Map<BigInteger, Greeting> greetingMap;


    private static Greeting save(Greeting greeting) {
        if (greetingMap == null) {
            greetingMap = new HashMap<BigInteger, Greeting>();
            nextId = BigInteger.ONE;

        }
        greeting.setId(nextId);
        nextId = nextId.add(BigInteger.ONE);
        greetingMap.put(greeting.getId(), greeting);
        return greeting;
    }

    static {
        Greeting g1 = new Greeting();
        g1.setText("Hello World");
        save(g1);

        Greeting g2 = new Greeting();
        g2.setText("Hola Mundo!");
        save(g2);

    }



    @RequestMapping(value = "/api/greetings", method = RequestMethod.GET, produces = MediaType.APPLICATION_JSON_VALUE)

    public ResponseEntity<Collection<Greeting>> getGreetings() {
        Collection<Greeting> greetings = greetingMap.values();

        return new ResponseEntity<Collection<Greeting>>(greetings,
                HttpStatus.OK);
    }


    @RequestMapping(value = "/api/greetings/{id}", method = RequestMethod.GET, produces = MediaType.APPLICATION_JSON_VALUE)

    public ResponseEntity<Greeting> getGreeting(
            @PathVariable("id") BigInteger id)
    {
        Greeting greeting = greetingMap.get(id);
        if (greeting == null) {
            return new ResponseEntity<Greeting>(HttpStatus.NOT_FOUND);
        }
        return new ResponseEntity<Greeting>(greeting, HttpStatus.OK);

    }


    @RequestMapping(value = "/api/greetings", method = RequestMethod.POST, consumes = MediaType.APPLICATION_JSON_VALUE, produces = MediaType.APPLICATION_JSON_VALUE)
    @ResponseBody
    public ResponseEntity<Greeting> createGreeting(
            @RequestBody Greeting greeting) {
        Greeting savedGreeting = save(greeting);
        return new ResponseEntity<Greeting>(savedGreeting, HttpStatus.CREATED);
    }

}

GreetingController.java

@SpringBootApplication
@ComponentScan(basePackages="webapi")
public class Application {


    public static void main(String[] args) throws Exception{
        SpringApplication.run(Application.class, args);

    }

}

public class Greeting {

    private BigInteger id;
    private String text;

    public Greeting() {

    }

    public BigInteger getId() {
        return id;
    }

    public void setId(BigInteger id) {
        this.id = id;
    }

    public String getText() {
        return text;
    }

    public void setText(String text) {
        this.text = text;
    }

}

@RestController

public class GreetingController {



    private static BigInteger nextId;
    private static Map<BigInteger, Greeting> greetingMap;


    private static Greeting save(Greeting greeting) {
        if (greetingMap == null) {
            greetingMap = new HashMap<BigInteger, Greeting>();
            nextId = BigInteger.ONE;

        }
        greeting.setId(nextId);
        nextId = nextId.add(BigInteger.ONE);
        greetingMap.put(greeting.getId(), greeting);
        return greeting;
    }

    static {
        Greeting g1 = new Greeting();
        g1.setText("Hello World");
        save(g1);

        Greeting g2 = new Greeting();
        g2.setText("Hola Mundo!");
        save(g2);

    }



    @RequestMapping(value = "/api/greetings", method = RequestMethod.GET, produces = MediaType.APPLICATION_JSON_VALUE)

    public ResponseEntity<Collection<Greeting>> getGreetings() {
        Collection<Greeting> greetings = greetingMap.values();

        return new ResponseEntity<Collection<Greeting>>(greetings,
                HttpStatus.OK);
    }


    @RequestMapping(value = "/api/greetings/{id}", method = RequestMethod.GET, produces = MediaType.APPLICATION_JSON_VALUE)

    public ResponseEntity<Greeting> getGreeting(
            @PathVariable("id") BigInteger id)
    {
        Greeting greeting = greetingMap.get(id);
        if (greeting == null) {
            return new ResponseEntity<Greeting>(HttpStatus.NOT_FOUND);
        }
        return new ResponseEntity<Greeting>(greeting, HttpStatus.OK);

    }


    @RequestMapping(value = "/api/greetings", method = RequestMethod.POST, consumes = MediaType.APPLICATION_JSON_VALUE, produces = MediaType.APPLICATION_JSON_VALUE)
    @ResponseBody
    public ResponseEntity<Greeting> createGreeting(
            @RequestBody Greeting greeting) {
        Greeting savedGreeting = save(greeting);
        return new ResponseEntity<Greeting>(savedGreeting, HttpStatus.CREATED);
    }

}

@RestController
公共类迎宾控制器{
私有静态大整数nextId；
私有静态映射迎宾映射；
专用静态问候语保存（问候语）{
if（greetingMap==null）{
greetingMap=新HashMap（）；
nextId=biginger.ONE；
}
问候语.setId（nextId）；
nextId=nextId.add（biginger.ONE）；
greetingMap.put（greeting.getId（），greeting）；
回敬问候；
}
静止的{
问候语g1=新问候语（）；
g1.setText（“你好世界”）；
保存（g1）；
问候语g2=新问候语（）；
g2.setText（“Hola Mundo！”）；
保存（g2）；
}
@RequestMapping（value=“/api/greetings”，method=RequestMethod.GET，products=MediaType.APPLICATION\u JSON\u value）
公众反应{
集合问候语=greetingMap.values（）；
返回新的响应（问候，
HttpStatus.OK）；
}
@RequestMapping（value=“/api/greats/{id}”，method=RequestMethod.GET，products=MediaType.APPLICATION\u JSON\u value）
公众反应(
@PathVariable（“id”）BigInteger（整数id）
{
Greeting Greeting=greetingMap.get（id）；
if（问候语==null）{
返回新的ResponseEntity（未找到HttpStatus.NOT_）；
}
返回新的响应（问候语，HttpStatus.OK）；
}
@RequestMapping（value=“/api/greetings”，method=RequestMethod.POST，consumes=MediaType.APPLICATION\u JSON\u value，products=MediaType.APPLICATION\u JSON\u value）
@应答器
公众反应(
@请求者（身体问候语）{
问候语savedGreeting=保存（问候语）；
返回新的ResponseEntity（savedGreeting，HttpStatus.CREATED）；
}
}

您已经将路径的映射定义为

/api/greetings

（带有参数）consumes=MediaType。应用程序\u JSON\u VALUE因此编译器正在等待JSON输入，但它正在获取类型为

text/plain

（它在堆栈跟踪中提到）的请求，所以无论从何处传递请求，都要确保内容类型为“application/json”

由于类型

text/plain

的

/api/greetings

没有映射，因此引发此异常

希望有帮助

---

祝你好运！

该服务需要一个

应用程序/json

内容类型

，但它接收到一个

文本/普通

输入

---

你用什么来制作帖子？如果你在用Postman进行测试，请确保在标题部分添加

内容类型

和

应用程序/json

值。

@KunalMalhotra有帮助吗？