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();   }  } }