Why restTemplate.put() throws “HttpClientErrorException: 404 Not Found”

I make a put request RestTemplate restTemplate = new RestTemplate(); restTemplate.put(new URI("http://localhost:8080/test"), dto); which successfully hits the rest endpoint @RequestMapping(value = "/test", method=RequestMethod.PUT) public void test123(@RequestBody DTO dto) { System.out.println("phone:"+dto.getPhone()); } but the "put" method on the client throws exception, even though the server is hit successfully and I don't expect return value. Exception in thread "main" org.springframework.web.client.HttpClientErrorException: 404 Not Found at org.springframework.web.client.DefaultResponseErrorHandler.handleError(DefaultResponseErrorHandler.java:91) at org.springframework.web.client.RestTemplate.handleResponseError(RestTemplate.java:589) at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:547) at org.springframework.web.client.RestTemplate.execute(RestTemplate.java:518) at org.springframework.web.client.RestTemplate.put(RestTemplate.java:394) at com.my.Main.main(Main.java:45)

查看连接路径是否正确。