Java 如何在Spring中使用RequetTemplate发送Post请求

我试图用SpringRequestTemplate发送一个post请求，但我总是收到401错误

使用卷曲

C:\Users\Latitude E 5410>curl -X POST http://localhost:8080/demo.rest.springsecu
rity.oauth2.0.authentication/oauth/token -H "Accept: application/json" -d "usern
ame=user1&password=user1&client_id=client1&client_secret=client1&grant_type=pass
word&scope=read,write"
{"access_token":"abe9d772-cb29-4bd7-b41a-437e50c10652","token_type":"bearer","re
fresh_token":"bc24f370-fcd8-4ae0-b724-a4241c746b29","expires_in":299844,"scope":
"read,write"}curl: (6) Could not resolve host: application

使用的java代码：

HttpEntity<String> request = new HttpEntity<String>(getHeadersWithClientCredentials());
        HttpHeaders headers = new HttpHeaders();
        headers.setContentType(MediaType.APPLICATION_JSON); //restTemplate.postForObject
        //restTemplate.
         MultiValueMap<String, String> mvm = new LinkedMultiValueMap<String, String>();
            mvm.add("client_id", "client1");
            mvm.add("client_secret", "client1");
            mvm.add("grant_type", "password");
            mvm.add("scope", "read,write,trust");
            mvm.add("username", "user1");
            mvm.add("password", "user1");
            HttpHeaders requestHeaders = new HttpHeaders();
            requestHeaders.setContentType(MediaType.APPLICATION_JSON);
            HttpEntity<MultiValueMap<String, String>> requestEntity = new HttpEntity<MultiValueMap<String, String>>(mvm, requestHeaders);
            ResponseEntity<Object> response = restTemplate.exchange("http://localhost:8080/demo.rest.springsecurity.oauth2.0.authentication/oauth/token?", HttpMethod.POST, requestEntity, Object.class);

---

我通过直接发送post请求找到了另一个解决方案w，我仍然觉得这样做（在url中传递参数）是一种不好的做法，但是它很管用

RestTemplate restTemplate = new RestTemplate();
        HttpHeaders headers = new HttpHeaders();
        headers.setAccept(Arrays.asList(MediaType.APPLICATION_JSON));

        HttpEntity<String> entity = new HttpEntity<String>("parameters", headers);

        ResponseEntity<String> s = restTemplate.exchange("http://localhost:8080/demo.rest.springsecurity.oauth2.0.authentication/oauth/token?username=user1&password=user1&client_id=client1&client_secret=client1&grant_type=password&scope=read", HttpMethod.POST, entity, String.class);
        System.out.println(s.getBody().toString());

RestTemplate RestTemplate=new RestTemplate（）；
HttpHeaders=新的HttpHeaders（）；
setAccept（Arrays.asList（MediaType.APPLICATION_JSON））；
HttpEntity=新的HttpEntity（“参数”，标题）；
ResponseEntity s=restTemplate.exchange（“http://localhost:8080/demo.rest.springsecurity.oauth2.0.authentication/oauth/token?username=user1&password=user1&client_id=client1&client_secret=client1&grant_type=password&scope=read，HttpMethod.POST，entity，String.class）；
System.out.println（s.getBody（）.toString（））；

RestTemplate restTemplate = new RestTemplate();
        HttpHeaders headers = new HttpHeaders();
        headers.setAccept(Arrays.asList(MediaType.APPLICATION_JSON));

        HttpEntity<String> entity = new HttpEntity<String>("parameters", headers);

        ResponseEntity<String> s = restTemplate.exchange("http://localhost:8080/demo.rest.springsecurity.oauth2.0.authentication/oauth/token?username=user1&password=user1&client_id=client1&client_secret=client1&grant_type=password&scope=read", HttpMethod.POST, entity, String.class);
        System.out.println(s.getBody().toString());