java 在 HttpURLConnection 中发送 PUT、DELETE HTTP 请求
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Send PUT, DELETE HTTP request in HttpURLConnection
提问by manitaz
I have created web service call using java below code. Now I need to make delete and put operations to be perform.
我使用下面的代码创建了 Web 服务调用。现在我需要执行删除和放置操作。
URL url = new URL("http://example.com/questions");
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setDoOutput(true);
conn.setRequestMethod( "POST" );
conn.setRequestProperty("Content-Type", "application/json");
OutputStream os = conn.getOutputStream();
os.write(jsonBody.getBytes());
os.flush();
When I add below code to perform DELETE action it gives errors saying:
当我添加以下代码以执行 DELETE 操作时，它会给出错误消息：
java.net.ProtocolException: HTTP method DELETE doesn't support output.
java.net.ProtocolException: HTTP 方法 DELETE 不支持输出。
conn.setRequestMethod( "DELETE" );
So how to perform delete and put requests?
那么如何执行删除和放置请求呢？
回答by Jamsheer
PUTexample using HttpURLConnection:
PUT使用示例HttpURLConnection：
URL url = null;
try {
url = new URL("http://localhost:8080/putservice");
} catch (MalformedURLException exception) {
exception.printStackTrace();
}
HttpURLConnection httpURLConnection = null;
DataOutputStream dataOutputStream = null;
try {
httpURLConnection = (HttpURLConnection) url.openConnection();
httpURLConnection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
httpURLConnection.setRequestMethod("PUT");
httpURLConnection.setDoInput(true);
httpURLConnection.setDoOutput(true);
dataOutputStream = new DataOutputStream(httpURLConnection.getOutputStream());
dataOutputStream.write("hello");
} catch (IOException exception) {
exception.printStackTrace();
} finally {
if (dataOutputStream != null) {
try {
dataOutputStream.flush();
dataOutputStream.close();
} catch (IOException exception) {
exception.printStackTrace();
}
}
if (httpsURLConnection != null) {
httpsURLConnection.disconnect();
}
}
DELETEexample using HttpURLConnection:
DELETE使用示例HttpURLConnection：
URL url = null;
try {
url = new URL("http://localhost:8080/deleteservice");
} catch (MalformedURLException exception) {
exception.printStackTrace();
}
HttpURLConnection httpURLConnection = null;
try {
httpURLConnection = (HttpURLConnection) url.openConnection();
httpURLConnection.setRequestProperty("Content-Type",
"application/x-www-form-urlencoded");
httpURLConnection.setRequestMethod("DELETE");
System.out.println(httpURLConnection.getResponseCode());
} catch (IOException exception) {
exception.printStackTrace();
} finally {
if (httpURLConnection != null) {
httpURLConnection.disconnect();
}
}
回答by Young Emil
FOR PUT
放置
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();
FOR DELETE
删除
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();
Actually got it from the link here: Send PUT, DELETE HTTP request in HttpURLConnection
实际上是从这里的链接得到的： Send PUT, DELETE HTTP request in HttpURLConnection
回答by Jamsheer
i suggest you to use restlet client for web service request .please refer the bellow sample code ,it may help you
我建议您使用 restlet 客户端进行 Web 服务请求。请参考下面的示例代码，它可能对您有所帮助
Client client = new Client(new Context(), Protocol.HTTP);
clientResource = new ClientResource(url);
ResponseRepresentation responseRep = null;
try {
clientResource.setNext(client);
clientResource.delete();
} catch (Exception e) {
e.printStackTrace();
}
