运行Spring后端时出现此错误：405不允许的方法不支持请求方法'PUT'

Question

这是我的控制器类，它可以编译并正常运行，但是从Postman发出放置请求时出现405错误。我的POST和GET方法工作正常，但PUT和DELETE却没有。网址为http://localhost:8080/tweets

@CrossOrigin
@RestController
@RequestMapping ("/tweets")
public class TweetController {

@Autowired
private TweetRepository tweets;
private TweetRepository tweetRepository;

@GetMapping
public List<Tweet> listar() {

    return tweets.findAll();

}

@GetMapping ("/{id}")
public ResponseEntity<Tweet> buscar(@PathVariable Long id) {

    Optional<Tweet> tweet = tweets.findById(id);

    if (tweet.isEmpty()) {
        return ResponseEntity.notFound().build();
    }

    return ResponseEntity.ok(tweet.get());
}

@PostMapping
@ResponseStatus(HttpStatus.CREATED)
public Tweet adicionar(@Valid @RequestBody Tweet tweet) {
    Optional<Tweet> tweetExistente = tweets
            .findByNomeAndTexto(tweet.getNome(), tweet.getTexto());

    if (tweetExistente.isPresent()) {
        throw new ResponseStatusException(HttpStatus.BAD_REQUEST,
                "Existing data");
    }

    return tweets.save(tweet);
}


@PutMapping("/{id}")
@ResponseStatus(HttpStatus.OK)
public ResponseEntity<Object> editar(@RequestBody Tweet tweet, @PathVariable long id) {

    Optional<Tweet> tweetOptional = tweetRepository.findById(id);

    if (!tweetOptional.isPresent())
        return ResponseEntity.notFound().build();

    tweet.setId(tweet.getId());
    tweet.setNome(tweet.getNome());
    tweet.setTexto(tweet.getTexto());

    tweetRepository.save(tweet);

    return ResponseEntity.noContent().build();
}

@DeleteMapping("/{id}")
@ResponseStatus(HttpStatus.OK)
public void deletar(@PathVariable long id) {
    tweetRepository.deleteById(id);
}

输出必须是这样的： {     “ timestamp”：“ 2019-11-22T12：53：32.290 + 0000”，     “状态”：405，     “错误”：“方法不允许”，     “ message”：“不支持请求方法'PUT'”，     “ trace”：“ org.springframework.web.HttpRequestMethodNotSupportedException：不支持请求方法'PUT'\ n \ tat org.springframework.web.servlet.mvc.method.RequestMappingInfoHandlerMapping.handleNoMatch（RequestMappingInfoHandlerMapping.java:201）\ n \ tat org.springframework.web.servlet.handler.AbstractHandlerMethodMapping.lookupHandlerMethod（AbstractHandlerMethodMapping.java:421）\ n \ t org.springframework.web.servlet.handler.AbstractHandlerMethodMapping.getHandlerInternal（AbstractHandlerMethodMapping.java:367）\ n \ tat org。 springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping.getHandlerInternal（RequestMappingHandlerMapping.java:449）\ n \ tat org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping.getHandlerInternal（RequestMappingHandlerMapping.java:67） \ n \ tat org.springframework.web.servlet.handler.AbstractHandlerMapping.getHandler（AbstractHandlerMapping.java:393）\ n \ tat org.springframework.web.servlet.DispatcherServlet.getHandler（DispatcherSe rvlet.java:1234)\n\tat org.springframework.web.servlet.DispatcherServlet.doDispatch（DispatcherServlet.java:1016）\ n \ tat org.springframework.web.servlet.DispatcherServlet.doService（DispatcherServlet.java:943） \ n \ tat org.springframework.web.servlet.FrameworkServlet.processRequest（FrameworkServlet.java:1006）\ n \ tat org.springframework.web.servlet.FrameworkServlet.doPut（FrameworkServlet.java:920）\ n \ tat javax。 servlet.http.HttpServlet.service（HttpServlet.java:663）\ n \ t org.springframework.web.servlet.FrameworkServlet.service（FrameworkServlet.java:883）\ n \ tat javax.servlet.http.HttpServlet.service（ HttpServlet.java:741)\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:231）\ n \ tat org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:166） \ n \ tat org.apache.tomcat.websocket.server.WsFilter.doFilter（WsFilter.java:53）\ n \ tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:193）\ n \ tat org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:166）\ n \ tat org.springframework.web.filter.RequestContextFilter.doFilterInternal（RequestContextFilter.java:100）\ n \ tat org.springframework.web .filter.OncePerRequestFilter.doFilter（OncePerRequestFilter.java:119）\ n \ tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:193）\ n \ tat org.apache.catalina.core.ApplicationFilterChain.doFilter （ApplicationFilterChain.java:166)\n\t org.springframework.web.filter.FormContentFilter.doFilterInternal（FormContentFilter.java:93）\ n \ t org.springframework.web.filter.OncePerRequestFilter.doFilter（OncePerRequestFilter.java:119 ）\ n \ tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:193）\ n \ tat org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:166）\ n \ tat org .springframework.web.filter.CharacterEncodingFilter.doFilterInternal（CharacterEncodingFilter.jav a：201）\ n \ tat org.springframework.web.filter.OncePerRequestFilter.doFilter（OncePerRequestFilter.java:119）\ n \ tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:193）\ n \ tat org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:166）\ n \ tat org.apache.catalina.core.StandardWrapperValve.invoke（StandardWrapperValve.java:202）\ n \ tat org.apache。 catalina.core.StandardContextValve.invoke（StandardContextValve.java:96）\ n \ t org.apache.catalina.authenticator.AuthenticatorBase.invoke（AuthenticatorBase.java:526）\ n \ tat org.apache.catalina.core.StandardHostValve。 invoke（StandardHostValve.java:139）\ n \ tat org.apache.catalina.valves.ErrorReportValve.invoke（ErrorReportValve.java:92）\ n \ tat org.apache.catalina.core.StandardEngineValve.invoke（StandardEngineValve.java： 74）\ n \ t org.apache.catalina.connector.CoyoteAdapter.service（CoyoteAdapter.java:343）\ n \ t org.apache.coyote.http11.Http11Processor.service（Http11Processor.java:408）\ n \ tatorg.apache.coyote.AbstractProcessorLight.process（AbstractProcessorLight.java:66）\ n \ t org.apache.coyote.AbstractProtocol $ ConnectionHandler.process（AbstractProtocol.java:861）\ n \ t org.apache.tomcat.util。 net.NioEndpoint $ SocketProcessor.doRun（NioEndpoint.java:1579）\ n \ tat org.apache.tomcat.util.net.SocketProcessorBase.run（SocketProcessorBase.java:49）\ n \ tat java.base / java.util。 parallel.ThreadPoolExecutor.runWorker（ThreadPoolExecutor.java:1128）\ n \ t java.base / java.util.concurrent.ThreadPoolExecutor $ Worker.run（ThreadPoolExecutor.java:628）\ n \ t org.apache.tomcat.util thread.TaskThread $ WrappingRunnable.run（TaskThread.java:61）\ n \ tat java.base / java.lang.Thread.run（Thread.java:835）\ n“，     “ path”：“ / tweets” }