HttpClient简单示例
源自http://www.ibm.com/developerworks/cn/opensource/os-httpclient/
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package com.xiva.test.httpclient;import java.io.IOException;import org.apache.commons.httpclient.DefaultHttpMethodRetryHandler;import org.apache.commons.httpclient.Header;import org.apache.commons.httpclient.HttpClient;import org.apache.commons.httpclient.HttpException;import org.apache.commons.httpclient.HttpStatus;import org.apache.commons.httpclient.NameValuePair;import org.apache.commons.httpclient.methods.GetMethod;import org.apache.commons.httpclient.methods.PostMethod;import org.apache.commons.httpclient.params.HttpMethodParams;public class HttpClientMain { private static HttpClient httpClient = new HttpClient(); public static void getMethodDemo() throws IOException { GetMethod getMethod = new GetMethod("http://www.ibm.com/"); getMethod.getParams().setParameter(HttpMethodParams.RETRY_HANDLER, new DefaultHttpMethodRetryHandler()); // 执行getMethod int statusCode = 0; try { statusCode = httpClient.executeMethod(getMethod); } catch (HttpException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } if (statusCode != HttpStatus.SC_OK) { System.err.println("Method failed: " + getMethod.getStatusLine()); } byte[] responseBody = getMethod.getResponseBody(); getMethod.releaseConnection(); System.out.println(new String(responseBody)); } public static void postMethodDemo() throws IOException { String url = "http://xiva.iteye.com/login"; PostMethod postMethod = new PostMethod(url); // 填入各个表单域的值 NameValuePair[] data = { new NameValuePair("authenticity_token", "ByoUb/Sn49tKYhCobMHFXUFnGSEtshm9F70naUAkdms="), new NameValuePair("name", ""), new NameValuePair("password", ""), new NameValuePair("button", "登 录") }; // 将表单的值放入postMethod中 postMethod.setRequestBody(data); // 执行postMethod int statusCode = httpClient.executeMethod(postMethod); // HttpClient对于要求接受后继服务的请求，象POST和PUT等不能自动处理转发 // 301或者302 if (statusCode == HttpStatus.SC_MOVED_PERMANENTLY || statusCode == HttpStatus.SC_MOVED_TEMPORARILY) { // 从头中取出转向的地址 Header locationHeader = postMethod.getResponseHeader("location"); String location = null; if (locationHeader != null) { location = locationHeader.getValue(); System.out.println("The page was redirected to:" + location); } else { System.err.println("Location field value is null."); } return; } else { byte[] responseBody = postMethod.getResponseBody(); System.out.println(statusCode); System.out.println(new String(responseBody)); } } public static void main(String[] args) throws IOException { // getMethodDemo(); postMethodDemo(); }}??