Created
February 22, 2015 08:20
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Sample code to do HTTP Post using Apache HTTP Client Library
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| import java.io.IOException; | |
| import java.io.UnsupportedEncodingException; | |
| import org.apache.commons.httpclient.Credentials; | |
| import org.apache.commons.httpclient.DefaultHttpMethodRetryHandler; | |
| import org.apache.commons.httpclient.HttpClient; | |
| import org.apache.commons.httpclient.HttpException; | |
| import org.apache.commons.httpclient.HttpStatus; | |
| import org.apache.commons.httpclient.UsernamePasswordCredentials; | |
| import org.apache.commons.httpclient.auth.AuthScope; | |
| import org.apache.commons.httpclient.methods.PostMethod; | |
| import org.apache.commons.httpclient.methods.StringRequestEntity; | |
| import org.apache.commons.httpclient.params.HttpMethodParams; | |
| public class HTTPClientDemo { | |
| private static String url = "http://localhost:8080/apps/app1"; | |
| public static void main(String[] args) { | |
| // Create an instance of HttpClient. | |
| HttpClient client = new HttpClient(); | |
| Credentials defaultcreds = new UsernamePasswordCredentials("user", "password"); | |
| client.getState().setCredentials(AuthScope.ANY, defaultcreds); | |
| // Create a method instance. | |
| PostMethod method = new PostMethod(url); | |
| String body = getPostBody(); | |
| StringRequestEntity requestEntity = null; | |
| try { | |
| requestEntity = new StringRequestEntity(body, "application/xml", "utf-8"); | |
| } catch (UnsupportedEncodingException e1) { | |
| // TODO Auto-generated catch block | |
| e1.printStackTrace(); | |
| } | |
| method.setRequestEntity(requestEntity); | |
| // Provide custom retry handler is necessary | |
| method.getParams().setParameter(HttpMethodParams.RETRY_HANDLER, | |
| new DefaultHttpMethodRetryHandler(3, false)); | |
| try { | |
| // Execute the method. | |
| int statusCode = client.executeMethod(method); | |
| if (statusCode != HttpStatus.SC_OK) { | |
| System.err.println("Method failed: " + method.getStatusLine()); | |
| } | |
| // Read the response body. | |
| byte[] responseBody = method.getResponseBody(); | |
| // Deal with the response. | |
| // Use caution: ensure correct character encoding and is not binary data | |
| System.out.println(new String(responseBody)); | |
| } catch (HttpException e) { | |
| System.err.println("Fatal protocol violation: " + e.getMessage()); | |
| e.printStackTrace(); | |
| } catch (IOException e) { | |
| System.err.println("Fatal transport error: " + e.getMessage()); | |
| e.printStackTrace(); | |
| } finally { | |
| // Release the connection. | |
| method.releaseConnection(); | |
| } | |
| } | |
| public static String getPostBody() { | |
| return "Sample POST Body"; | |
| } | |
| } |
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