怎样通过程序模拟网页post数据到一个servlet?

页面还是要吧，就是要有个运行的页面，如下面这样 html+javascript来post form
<script language=JavaScript> 
function DoSendToClient() {
  //document.toClientWithReturnWindow.action='http://epay.net.cn/epay/getFromEpay.aspx';
  document.alogon.submit();
}
</script>
<body onload="DoSendToClient()">
<table width="68%" border="0" align="center" cellpadding="0" cellspacing="0">
  <tr> 
    <td bgcolor="#004d99" width="20" height="25"></td>
    <form  method="POST" action='http://expert.csdn.net/member/logon.asp'  name="alogon" >
      <td bgcolor="#004d99"><font color="#FFFFFF">姓 名:</font> <input name="name" type="text" class=FormText_1 value="xuu27" size="7"> 
        &nbsp;&nbsp; <font color="#FFFFFF">密 码: 
        <input name="pass" class=FormText_1 type="password"  value="******" size="7">
        </font> <select name="type" class=FormText_1>
          <option value="1" selected>我的论坛</option>
          <option value="2">我的软件</option>
          <option value="3">我的订单</option>
          <option value="4">我的文档</option>
          <option value="5">我的简历</option>
        </select> <INPUT TYPE="image" width=0 height=0> <input type="submit" name="Submit" value="登  陆"> 
        &nbsp;&nbsp; </td>
    </form>
  </tr>
</table>
</body>

解决方案 »

  1.   

    请看http://expert.csdn.net/Expert/topic/2238/2238658.xml?temp=1.171291E-03粘贴一份：
    import java.io.File;
    import java.io.FileInputStream;
    import java.io.IOException;
    import java.io.OutputStream;
    import java.net.InetAddress;
    import java.net.Socket;public class SimulateUpload
    {
        private static final byte[] BOUNDARY = "---------------------------7d33bc1b47038c".getBytes();
        private static final byte[] CRLF = "\r\n".getBytes();    public void simUpload(String page, String[] paramNames, Object[] paramValues, OutputStream os) throws IOException
        {
            int contentLength = calculateLength(paramNames, paramValues);        os.write(("POST " + page + " HTTP/1.1").getBytes());
            os.write(CRLF);        os.write("User-Agent: myselfHttp/1.0".getBytes());
            os.write(CRLF);        os.write("Accept: */*".getBytes());
            os.write(CRLF);        os.write("Host: ".getBytes());
            os.write(InetAddress.getLocalHost().getHostAddress().getBytes());
            os.write(CRLF);        os.write("Content-Type: multipart/form-data; boundary=".getBytes());
            os.write(BOUNDARY);
            os.write(CRLF);        os.write(("Content-Length: " + contentLength).getBytes());
            os.write(CRLF);        os.write(CRLF);        os.write(BOUNDARY);
            os.write(CRLF);
            for(int i=0; i<paramNames.length; i++)
            {
                if(paramValues[i] instanceof String)
                    writeParameter(os, paramNames[i], (String) paramValues[i]);
                else if(paramValues[i] instanceof File)
                    writeFile(os, paramNames[i], (File) paramValues[i]);
            }
            os.flush();
        }    private void writeFile(OutputStream os, String paramName, File file) throws IOException
        {
            os.write("Content-Disposition: form-data; name=\"".getBytes());
            os.write(paramName.getBytes());
            os.write("\"; filename=\"".getBytes());
            os.write(file.getAbsolutePath().getBytes());
            os.write("\"\r\nContent-Type: application/octet-stream".getBytes());
            os.write(CRLF);
            os.write(CRLF);        FileInputStream fis = new FileInputStream(file);
            byte[] buf = new byte[4096];
            int bytes = 0;
            while((bytes = fis.read(buf)) != -1)
                os.write(buf, 0, bytes);
            fis.close();        os.write(CRLF);
            os.write(BOUNDARY);
            os.write(CRLF);
        }    private void writeParameter(OutputStream os, String name, String value) throws IOException
        {
            os.write("Content-Disposition: form-data; name=\"".getBytes());
            os.write(name.getBytes());
            os.write('"');
            os.write(CRLF);
            os.write(CRLF);
            os.write(value.getBytes());
            os.write(CRLF);
            os.write(BOUNDARY);
            os.write(CRLF);
        }    private int calculateLength(String[] paramNames, Object[] paramValues)
        {
            int result = BOUNDARY.length + CRLF.length;
            for(int i=0; i<paramNames.length; i++)
            {
                if(paramValues[i] instanceof String)
                    result += 88 + paramNames[i].getBytes().length + ((String)paramValues[i]).getBytes().length;
                else if(paramValues[i] instanceof File)
                {
                    File file = (File) paramValues[i];
                    result += 141 + paramNames[i].getBytes().length + file.getAbsolutePath().getBytes().length + file.length();
                }
            }
            return result;
        }    public static void main(String[] args)
        {
            try
            {
                Socket socket = new Socket("localhost", 80);
                OutputStream os = socket.getOutputStream();
                SimulateUpload sim = new SimulateUpload();
                String[] paramNames = new String[]{"param1", "param2", "param3", "file", "file2"};
                Object[] paramValues = new Object[]{"value1", "value2", "value3", new File("d:\\test.txt"), new File("d:\\test1.txt")};
                sim.simUpload("/uploadServlet", paramNames, paramValues, os);
                os.flush();
                os.close();
                socket.close();
            }
            catch(Exception e)
            {
                e.printStackTrace();
            }
        }
    }
      

  2.   

    浏览的提交数据实现原理:SOCKETL连结到目标服务器的80口,POST命令发送数据String host="sohu.com";
    int port=80;
    fileName="/news/cgi-bin/add.cgi";
    String content="可以是name=value形式";
    Socket sc = new Socket(host,port);
    PrintWriter pw = new PrintWriter(new OutputStreamWriter(sc.getOutputStream()));
    String cmd = "POST "+fileNaem+" HTTP/1.0\r\n"+"User-Agent: myselfHttp/1.0\r\n"+
                     "Accept: www/source; text/html; image/gif; */*\r\n";
          cmd += "Content-type: application/x-www-form-urlencoded\r\n";
          cmd += "Content-length: " + content.length() + "\r\n\r\n";
          cmd += content+"\r\n";
          cmd += 要发送的数据;//注意最后要以\r\n结尾
    pw.print(cmd);
    pw.close();