HttpURLConnection的问题

Question

String urlstring="http://member.ecplaza.net/auth.do?MemberID=tradediscovery1&Password=123456&action=login&rurl=http://www.ecplaza.net/InquiryBox/InquiryBox.do?subject=new year&comments=tttttttttttttttttttttttt&mode=RFQ&id=1894977&clickfrom=M&cmd=send&ConfirmCD=
";
URL url=new URL(urlstring);
HttpURLConnection connection = (HttpURLConnection) url.openConnection();  
InputStreamReader inputStream=new InputStreamReader(connection.getInputStream());
BufferedReader buffRead=new BufferedReader(inputStream);
  ......

Answer 1

/*
 * CreateDate 2005-1-21
 */
package com.test;
import java.io.*;import java.net.*;
public class Urltest6 {
public static void  main(String [] args){

try{
    URL url=new URL("http://member.ecplaza.net/auth.do?MemberID=tradediscovery1&Password=123456&action=login&rurl=http://www.ecplaza.net/InquiryBox/InquiryBox.do?subject=newyear&comments=tttttttttttttttttttttttt&mode=RFQ&id=1894977&clickfrom=M&cmd=send&ConfirmCD=");
HttpURLConnection conn = (HttpURLConnection)url.openConnection();
conn = (HttpURLConnection)url.openConnection();
conn.setDoInput(true);
conn.setRequestMethod("POST");
conn.setAllowUserInteraction(false);
conn.setUseCaches(false);
//String cookie = "ccm=PWD=dfad&UID=%B9%A8%BE%&UniqueID=U020209094506055";
//String cookie = "member_cookie=eXVodWExNjNAZXlvdS5jb218MjY0";
//conn.setRequestProperty("Cookie",cookie);
//System.out.println("\ncookie=:" + cookie);
conn.connect();
  //  int responseCode = conn.getResponseCode();
   //  String responseMessage = conn.getResponseMessage();
    // System.err.println(responseCode);
    // System.err.println(responseMessage);
BufferedReader in=new BufferedReader(new InputStreamReader(conn.getInputStream()));//设置输入流，为了得到返回的HTML
while(in.readLine()!=null){ //如果返回的页面不为空
 System.out.println(in.readLine());//得到所有的HTML
}

in.close();
}catch(Exception ex){
System.err.println(ex.getStackTrace());

}

}}为什么我这么写不行呢

Answer 2

public static String sendGet(String url,String param)
{
String result = "";
try{
String urlName = url + "?"+param;
URL U = new URL(urlName);
URLConnection connection = U.openConnection();
connection.connect();

BufferedReader in = new BufferedReader(new InputStreamReader(connection.getInputStream()));
String line;
while ((line = in.readLine())!= null)
{
result += line;
}
in.close();

}catch(Exception e){
System.out.println("没有结果！"+e);
}
return result;
}
public static String sendPost(String url,String param)
{
String result="";
try{
URL httpurl = new URL(url);
HttpURLConnection httpConn = (HttpURLConnection)httpurl.openConnection();       
httpConn.setDoOutput(true);
httpConn.setDoInput(true);
PrintWriter out = new PrintWriter(httpConn.getOutputStream());
out.print(param);
out.flush();
out.close();
BufferedReader in = new BufferedReader(new InputStreamReader(httpConn.getInputStream()));
String line;
while ((line = in.readLine())!= null)
{
result += line; 
}
in.close();

}catch(Exception e){
System.out.println("没有结果！"+e);
}
return result;
}

Answer 3

要带参数 传递。。
 如果对方判断了session 或者cookie 就有些麻烦了

Answer 4

就是要session或者cookie的呀
谁知道呀

Answer 5

一个奇怪的问题为什么会截断   private  void doPost(String ssid,String body) 
 {  
String strUrl="http://www.rusbiz.com/send_message.html"; 
String postdata="formname=send_message";
postdata+="&action=send_message";
postdata+="&sid=send_message";
postdata+="&"+ssid;
postdata+="&lang=en";
postdata+="&cid=52820";
postdata+="&subject=Find 800,000+ FREE buying leads at Bizdiscovery.com";
postdata+="&body="+body; 
    System.err.println(postdata);
String ss; 
StringBuffer s2=new StringBuffer(""); 
            
    try 
        { 
URL url = new URL(strUrl); 
HttpURLConnection conn = (HttpURLConnection)url.openConnection();
conn.setDoOutput(true); 
conn.setRequestMethod("POST");
conn.setAllowUserInteraction(false);
conn.setUseCaches(false);
conn.connect();
OutputStreamWriter wr = new OutputStreamWriter(conn.getOutputStream()); 
wr.write(postdata); 
wr.flush(); 
/*
BufferedReader rd = new BufferedReader(new InputStreamReader(conn.getInputStream())); 
while ((ss=rd.readLine())!=null) 
{ 
 System.err.println(rd.readLine());
} 
*/
wr.close(); 
//rd.close(); 



} 
      catch(Exception e) 
    { 
       System.err.println("fabu error");
        System.err.println(e.getStackTrace());
        
     } 
其中body=Meet 800,000+ global buyer leads from thousands business websites at http://www.bizdiscovery.com. The business info are from 100+ world famous business websites like Alibaba.com,Globalsources.com,ec21.com and it covers the industries from Industrial Supplies,Textiles & Leather, Gifts & Crafts, Apparel Fashion, Home Suppliers, Electronics & Electrical to Construction  etc. Make your business easy.<br>
<br>It is Free and simple!<br><br>Visit http://www.bizdiscovery.com now!<br><br>Wishing you every success in business!<br><br>Annie Lam<br>Service Department<br>[email protected]<br><br>http://www.bizdiscovery.com<br>Global Business Search Engine!<br><br>We respect your privacy. If you received this e-mail by mistake or do not wish to receive e-mails from us in the future, we will inactivate your name on our mailing database. Just inform us at Customer Service e-mail:[email protected].<br>在收的时候body只有Meet 800,000+ global buyer leads from thousands business websites at http://www.bizdiscovery.com. The business info are from 100+ world famous business websites like Alibaba.com,Globalsources.com,ec21.com and it covers the industries from Industrial Supplies,Textiles 帮助看看呀

Answer 6

import java.io.*;
import java.net.*;/**
 *
 * <p>Title: 将指定的HTTP网络资源在本地以文件形式存放</p>
 * <p>Description: </p>
 * <p>Copyright: Copyright (c) 2004-2005</p>
 */
public class HttpGet
{
    private static int BUFFER_SIZE = 1024; //缓冲区大小    /**
     * 构造方法
     */
    public HttpGet()
    {    }    /**
     * 根据列表下载资源
     */
    public void downLoadByUrl(String downUrl, String fileName) throws IOException
    {
       saveToFile(downUrl, fileName);
    }    /**
     * 将HTTP资源另存为文件
     *
     * @param destUrl String
     * @param fileName String
     * @throws Exception
     */
    public void saveToFile(String destUrl, String fileName) throws IOException
    {
        FileOutputStream fos = null;
        BufferedInputStream bis = null;
        HttpURLConnection httpUrl = null;
        URL url = null;
        byte[] buf = new byte[BUFFER_SIZE];
        int size = 0;
        //建立链接
        url = new URL(destUrl);
        //打开链接
        httpUrl = (HttpURLConnection) url.openConnection();
        //连接指定的资源
        httpUrl.connect();
        //获取网络输入流
        bis = new BufferedInputStream(httpUrl.getInputStream());
        //DataInputStream bis = new DataInputStream(httpUrl.getInputStream());        //创建目录
        File parentDir = new File(fileName).getParentFile();
        if( !parentDir.exists() || parentDir.isFile())
        {
            parentDir.mkdirs();
        }
        //建立文件
        fos = new FileOutputStream(fileName);
        //DataOutputStream fos = new DataOutputStream(new FileOutputStream(fileName));
        System.out.println("正在获取链接[" + destUrl + "]的内容...\n将其保存为文件[" + fileName +
                           "]");
        System.out.println(new File(fileName).getAbsolutePath());
        //保存文件
        while ( (size = bis.read(buf)) != -1)
        {
            fos.write(buf, 0, size);
        }
        fos.close();
        bis.close();
        httpUrl.disconnect();
    }    /**
     * 设置代理服务器
     *
     * @param proxy String
     * @param proxyPort String
     */
//    public void setProxyServer(String proxy, String proxyPort)
//    {
//        //设置代理服务器
//        System.getProperties().put("proxySet", "true");
//        System.getProperties().put("proxyHost", proxy);
//        System.getProperties().put("proxyPort", proxyPort);
//
//    }    /**
     * 设置认证用户名与密码
     *
     * @param uid String
     * @param pwd String
     */
//    public void setAuthenticator(String uid, String pwd)
//    {
//        Authenticator.setDefault(new MyAuthenticator(uid, pwd));
//    }    /**
     * 主方法(用于测试)
     *
     * @param argv String[]
     */
    public static void main(String argv[])
    {        HttpGet oInstance = new HttpGet();
        try
        {
            //增加下载列表（此处用户可以写入自己代码来增加下载列表）            //开始下载
            long start = System.currentTimeMillis();
            oInstance.downLoadByUrl(
                "http://10.78.16.182/downloads/usmro.zip",
                "./usmro.zip");
            long time = System.currentTimeMillis() - start;
            System.out.println("it takes " + time + "to down!");
        }
        catch (Exception err)
        {
            System.out.println(err.getMessage());
        }    }}