commons-httpclient.jar的使用(处理页面重定向)

 

package com.test;

import java.io.IOException;

import org.apache.commons.httpclient.Header;
import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.HttpMethod;
import org.apache.commons.httpclient.HttpStatus;
import org.apache.commons.httpclient.StatusLine;
import org.apache.commons.httpclient.methods.GetMethod;

public class RedirectTest ...{
    
    public static void main(String[] args) throws IOException...{
        
        HttpClient client = new HttpClient();
        
        client.getHostConfiguration();
    //    client.getHostConfiguration().setHost("www.imobile.com.cn", 80, "http");
    //    client.getHostConfiguration().setHost("", 80);
        
        HttpMethod method = new GetMethod("http://127.0.0.1:8080/httpClient/a.jsp");
        client.executeMethod(method);
        StatusLine statusMsg = method.getStatusLine();
        System.out.println(statusMsg);
        System.out.println(method.getResponseBodyAsString());
        System.out.println("--------------------------------------------------------------------------");
        
        
        //检查是否有重定向
        int statusCode = method.getStatusCode();
        System.out.println(statusCode);
        if (statusCode == HttpStatus.SC_MOVED_PERMANENTLY || statusCode == HttpStatus.SC_MOVED_TEMPORARILY 
                || statusCode ==  HttpStatus.SC_SEE_OTHER || statusCode == HttpStatus.SC_TEMPORARY_REDIRECT)...{
            //读取新的URL地址
            Header header = method.getRequestHeader("location");
            if (header != null)...{
                String newurl = header.getValue();
                if (header == null || header.equals(""))...{
                    newurl = "/";
                }
                GetMethod redirect = new GetMethod(newurl);
                client.executeMethod(redirect);
                System.out.println("redirect:  " + redirect.getStatusLine().toString());
                redirect.releaseConnection();
            }else...{
                System.out.println("Invialid Redirect///");
            }
        }
        
    }
}