Java 如何在HttpURLConnection中发送PUT、DELETE HTTP请求?
我想知道是否可以通过Java 如何在HttpURLConnection中发送PUT、DELETE HTTP请求?,java,httpurlconnection,put,http-delete,Java,Httpurlconnection,Put,Http Delete,我想知道是否可以通过java.net.HttpURLConnection向基于HTTP的URL发送PUT、DELETE请求(实际上) 我读过很多文章,介绍如何发送GET、POST、TRACE和OPTIONS请求,但我仍然没有找到任何成功执行PUT和DELETE请求的示例代码。我建议使用Apache HTTPClient 要执行HTTP PUT,请执行以下操作: URL url = new URL("http://www.example.com/resource"); HttpURLConn
java.net.HttpURLConnection
向基于HTTP的URL发送PUT、DELETE请求(实际上)
我读过很多文章,介绍如何发送GET、POST、TRACE和OPTIONS请求,但我仍然没有找到任何成功执行PUT和DELETE请求的示例代码。我建议使用Apache HTTPClient
要执行HTTP PUT,请执行以下操作:
URL url = new URL("http://www.example.com/resource");
HttpURLConnection httpCon = (HttpURLConnection) url.openConnection();
httpCon.setDoOutput(true);
httpCon.setRequestMethod("PUT");
OutputStreamWriter out = new OutputStreamWriter(
httpCon.getOutputStream());
out.write("Resource content");
out.close();
httpCon.getInputStream();
要执行HTTP删除,请执行以下操作:
URL url = new URL("http://www.example.com/resource");
HttpURLConnection httpCon = (HttpURLConnection) url.openConnection();
httpCon.setDoOutput(true);
httpCon.setRequestProperty(
"Content-Type", "application/x-www-form-urlencoded" );
httpCon.setRequestMethod("DELETE");
httpCon.connect();
这就是它对我的作用:
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setRequestMethod("DELETE");
int responseCode = connection.getResponseCode();
UrlConnection是一个很难使用的API。HttpClient是迄今为止最好的API,它将使您不必浪费时间来搜索如何实现某些事情,如stackoverflow问题所示。我是在几个REST客户机中使用jdk HttpUrlConnection之后写这篇文章的。
此外,在可伸缩性功能(如线程池、连接池等)方面,HttpClient更具优势我同意@adietisheim和其他建议HttpClient的人的观点 我花了很多时间尝试用HttpURLConnection调用rest服务,但它并没有说服我,之后我用HttpClient尝试了一下,它真的更简单、更容易理解、更漂亮 进行put http调用的代码示例如下:
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpPut putRequest = new HttpPut(URI);
StringEntity input = new StringEntity(XML);
input.setContentType(CONTENT_TYPE);
putRequest.setEntity(input);
HttpResponse response = httpClient.execute(putRequest);
然后在代码中:
public void yourmethod(String url, String type, String reqbody){
HttpURLConnection con = null;
String result = null;
try {
con = conUtil.getHttpConnection( url , type);
//you can add any request body here if you want to post
if( reqbody != null){
con.setDoInput(true);
con.setDoOutput(true);
DataOutputStream out = new DataOutputStream(con.getOutputStream());
out.writeBytes(reqbody);
out.flush();
out.close();
}
con.connect();
BufferedReader in = new BufferedReader(new InputStreamReader(con.getInputStream()));
String temp = null;
StringBuilder sb = new StringBuilder();
while((temp = in.readLine()) != null){
sb.append(temp).append(" ");
}
result = sb.toString();
in.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
logger.error(e.getMessage());
}
//result is the response you get from the remote side
}
为了正确地输入HTML,您必须用try/catch将其包围起来:
try {
url = new URL("http://www.example.com/resource");
HttpURLConnection httpCon = (HttpURLConnection) url.openConnection();
httpCon.setDoOutput(true);
httpCon.setRequestMethod("PUT");
OutputStreamWriter out = new OutputStreamWriter(
httpCon.getOutputStream());
out.write("Resource content");
out.close();
httpCon.getInputStream();
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (ProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
甚至Rest模板也可以是一个选项:
String payload = "<?xml version=\"1.0\" encoding=\"UTF-8\"?<RequestDAO>....";
RestTemplate rest = new RestTemplate();
HttpHeaders headers = new HttpHeaders();
headers.add("Content-Type", "application/xml");
headers.add("Accept", "*/*");
HttpEntity<String> requestEntity = new HttpEntity<String>(payload, headers);
ResponseEntity<String> responseEntity =
rest.exchange(url, HttpMethod.PUT, requestEntity, String.class);
responseEntity.getBody().toString();
String payload=“有一种简单的删除和放置请求的方法,您只需在post请求中添加一个“\u method
”参数,然后写入“put
”或“delete
“为了它的价值 你能告诉我们你试着使用的代码吗?是的。所有这些都是可能的,但实际上取决于您的邮件/博客提供商支持的API。您好,我遇到了delete
的问题。当我在这里运行这段代码时,实际上什么都没有发生,请求没有被发送。当我执行post
请求时也会遇到同样的情况,但在那里我可以使用触发请求的httpCon.getContent()
。但是httpCon.connect()
不会在我的机器中触发任何东西:-)在上面的示例中,我相信您需要在最后调用httpCon.getInputStream()以使请求实际被发送。我得到了“java.net.ProtocolException:DELETE不支持将@edisusanto写入指定资源(由URL指示)是将被删除的数据。为什么推荐HTTPClient?它很大。我的意思是-在大小上。@jayarjo,它是Android SDK的一部分。@Zamel:Android到底在哪里进入图片?@talonx:我不知道。我的错误。我埋头于Android开发,因此产生了困惑。当OP明确表示应该使用HttpUrlConnection时,那么为什么要使用HttpClient?我只是想说声谢谢。花了很多时间试图使用HttpURLConnection
让我的代码正常工作,但一直遇到一个奇怪的错误,特别是:在流模式下,由于服务器身份验证而无法重试。听你的劝告对我有用。我意识到这并不能完全回答这个问题,这个问题要求使用HttpURLConnection
,但你的回答帮助了我。@不推荐使用HttpClientBuilder而不是使用获取“java.io.IOException:unsupported method:put”inJ2me sdk logger这是我在这方面看到的最好答案之一。
String payload = "<?xml version=\"1.0\" encoding=\"UTF-8\"?<RequestDAO>....";
RestTemplate rest = new RestTemplate();
HttpHeaders headers = new HttpHeaders();
headers.add("Content-Type", "application/xml");
headers.add("Accept", "*/*");
HttpEntity<String> requestEntity = new HttpEntity<String>(payload, headers);
ResponseEntity<String> responseEntity =
rest.exchange(url, HttpMethod.PUT, requestEntity, String.class);
responseEntity.getBody().toString();