转自：http://blog.csdn.net/jadyer/article/details/8656019
[java] view plain copy print? package com.jadyer.httpclient; import org.apache.http.HttpEntity; import org.apache.http.HttpHost; import org.apache.http.HttpResponse; import org.apache.http.client.HttpClient; import org.apache.http.client.methods.HttpGet; import org.apache.http.client.methods.HttpUriRequest; import org.apache.http.entity.ContentType; import org.apache.http.impl.client.DefaultHttpClient; import org.apache.http.protocol.BasicHttpContext; import org.apache.http.protocol.ExecutionContext; import org.apache.http.protocol.HttpContext; import org.apache.http.util.EntityUtils; public class HttpClientDemo { /** * 获取重定向之后的网址信息 * @see HttpClient缺省会自动处理客户端重定向 * @see 即访问网页A后,假设被重定向到了B网页,那么HttpClient将自动返回B网页的内容 * @see 若想取得B网页的地址,就需要借助HttpContext对象,HttpContext实际上是客户端用来在多次请求响应的交互中,保持状态信息的 * @see 我们自己也可以利用HttpContext来存放一些我们需要的信息,以便下次请求的时候能够取出这些信息来使用 */ public static void getRedirectInfo(){ HttpClient httpClient = new DefaultHttpClient(); HttpContext httpContext = new BasicHttpContext(); HttpGet httpGet = new HttpGet("http://127.0.0.1:8088/blog/main.jsp"); try { //将HttpContext对象作为参数传给execute()方法,则HttpClient会把请求响应交互过程中的状态信息存储在HttpContext中 HttpResponse response = httpClient.execute(httpGet, httpContext); //获取重定向之后的主机地址信息,即"http://127.0.0.1:8088" HttpHost targetHost = (HttpHost)httpContext.getAttribute(ExecutionContext.HTTP_TARGET_HOST); //获取实际的请求对象的URI,即重定向之后的"/blog/admin/login.jsp" HttpUriRequest realRequest = (HttpUriRequest)httpContext.getAttribute(ExecutionContext.HTTP_REQUEST); System.out.println("主机地址:" + targetHost); System.out.println("URI信息:" + realRequest.getURI()); HttpEntity entity = response.getEntity(); if(null != entity){ System.out.println("响应内容:" + EntityUtils.toString(entity, ContentType.getOrDefault(entity).getCharset())); EntityUtils.consume(entity); } } catch (Exception e) { e.printStackTrace(); }finally{ httpClient.getConnectionManager().shutdown(); } } }