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在Java中,HTTP请求方法主要有以下几种:
URL url = new URL("http://example.com/resource");
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setRequestMethod("GET");
URL url = new URL("http://example.com/resource");
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setRequestMethod("POST");
connection.setDoOutput(true);
DataOutputStream wr = new DataOutputStream(connection.getOutputStream());
wr.writeBytes("param1=value1¶m2=value2");
wr.flush();
wr.close();
URL url = new URL("http://example.com/resource");
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setRequestMethod("PUT");
connection.setDoOutput(true);
DataOutputStream wr = new DataOutputStream(connection.getOutputStream());
wr.writeBytes("New content");
wr.flush();
wr.close();
URL url = new URL("http://example.com/resource");
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setRequestMethod("DELETE");
URL url = new URL("http://example.com/resource");
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setRequestMethod("HEAD");
URL url = new URL("http://example.com/resource");
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setRequestMethod("OPTIONS");
URL url = new URL("http://example.com/resource");
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setRequestMethod("PATCH");
connection.setDoOutput(true);
DataOutputStream wr = new DataOutputStream(connection.getOutputStream());
wr.writeBytes("{\"key\":\"value\"}");
wr.flush();
wr.close();
除了Java标准库中的HttpURLConnection
,还可以使用第三方库如Apache HttpClient、OkHttp等来更方便地进行HTTP请求。
CloseableHttpClient client = HttpClients.createDefault();
HttpGet request = new HttpGet("http://example.com/resource");
CloseableHttpResponse response = client.execute(request);
OkHttpClient client = new OkHttpClient();
Request request = new Request.Builder()
.url("http://example.com/resource")
.build();
Response response = client.newCall(request).execute();
这些库提供了更丰富的功能和更好的易用性。
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