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Java - HttpURLConnection setRequestMethod() Method
The Java HttpURLConnection setRequestMethod() method set the method for the URL request, one of −
GET
POST
HEAD
OPTIONS
PUT
DELETE
TRACE
The default method is GET.
Declaration
Following is the declaration for java.net.HttpURLConnection.setRequestMethod() method
public void setRequestMethod(String method) throws ProtocolException
Parameters
method − the HTTP method
Return Value
NA
Exception
ProtocolException − if the method cannot be reset or if the requested method isn't valid for HTTP.
SecurityException − if a security manager is set and the method is "TRACE", but the "allowHttpTrace" NetPermission is not granted.
Example 1
The following example shows the usage of Java HttpURLConnection setRequestMethod() method for a valid url with https protocol. In this example, we're creating an instance of URL class. Using url.openConnection() method, we're getting the HttpURLConnection instance. Using getRequestMethod(), we're checking the request method value printing the same. Now using setRequestMethod() method, we're changing the value of request method and printing the same again −
package com.tutorialspoint; import java.io.IOException; import java.net.HttpURLConnection; import java.net.URL; public class HttpUrlConnectionDemo { public static void main(String [] args) { try { URL url = new URL("https://www.tutorialspoint.com/index.htm?language=en#j2se"); HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection(); String result = urlConnection.getRequestMethod(); System.out.println("request method: " + result); urlConnection.setRequestMethod("POST"); result = urlConnection.getRequestMethod(); System.out.println("request method: " + result); } catch (IOException e) { e.printStackTrace(); } } }
Let us compile and run the above program, this will produce the following result −
Output
request method: GET request method: POST
Example 2
The following example shows the usage of Java HttpURLConnection setRequestMethod() method for a valid url with https protocol. In this example, we're creating an instance of URL class. Using url.openConnection() method, we're getting the HttpURLConnection instance. Using getRequestMethod(), we're checking the request method value printing the same. Now using setRequestMethod() method, we're changing the value of request method and printing the same. As connect is established already, setRequestMethod() is throwing an exception as shown below −
package com.tutorialspoint; import java.io.IOException; import java.net.HttpURLConnection; import java.net.URL; public class HttpUrlConnectionDemo { public static void main(String [] args) { try { URL url = new URL("http://www.tutorialspoint.com/index.htm?language=en#j2se"); HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection(); urlConnection.connect(); System.out.println("Connected."); String result = urlConnection.getRequestMethod(); System.out.println("request method: " + result); urlConnection.setRequestMethod("POST"); result = urlConnection.getRequestMethod(); System.out.println("request method: " + result); urlConnection.disconnect(); System.out.println("Disconnected."); } catch (IOException e) { e.printStackTrace(); } } }
Let us compile and run the above program, this will produce the following result −
Output
Connected. request method: GET Exception in thread "main" java.lang.IllegalStateException: connect in progress at sun.net.www.protocol.http.HttpURLConnection.setRequestMethod(Unknown Source) at com.tutorialspoint.HttpUrlConnectionDemo.main(HttpUrlConnectionDemo.java:18)
Example 3
The following example shows the usage of Java HttpURLConnection setRequestMethod() method for a valid url with http protocol. In this example, we're creating an instance of URL class. Using url.openConnection() method, we're getting the HttpURLConnection instance. Using getRequestMethod(), we're checking the request method value printing the same. Now using setRequestMethod() method, we're changing the value of request method and printing the same again −
package com.tutorialspoint; import java.io.IOException; import java.net.HttpURLConnection; import java.net.URL; public class HttpUrlConnectionDemo { public static void main(String [] args) { try { URL url = new URL("http://www.tutorialspoint.com/index.htm?language=en#j2se"); HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection(); String result = urlConnection.getRequestMethod(); System.out.println("request method: " + result); urlConnection.setRequestMethod("POST"); result = urlConnection.getRequestMethod(); System.out.println("request method: " + result); } catch (IOException e) { e.printStackTrace(); } } }
Let us compile and run the above program, this will produce the following result −
Output
request method: GET request method: POST
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