求求大家帮帮我 c/s的网络用户登陆 的 东东

Question

1.通过socket链接就不用说了,网上例子很多.2.通过http协议链接,链接结果保存到文件中.import java.io.BufferedOutputStream;
import java.io.*;
import java.net.*;
import java.net.URLConnection;public class TestServlet {
    public TestServlet() {
        try {
            StringBuffer strFileInfoBuf = new StringBuffer();            String strProcessURL =
                "http://127.0.0.1/NSSB/MainServletXGMCX"
                    + "?FLAG=sendfile&name=myname";            //connect server
            URL objURL = new URL(strProcessURL);
            //open connect
            URLConnection objConn = objURL.openConnection();
            objConn.setDoOutput(true);
            //get server return message
            // BufferedInputStream objInput = new BufferedInputStream(objConn.getInputStream());
            StringBuffer strTempBuf = new StringBuffer();
            byte[] byteArray = new byte[2048];
            int nReadCount = -1;
            BufferedOutputStream objOutput =
                new BufferedOutputStream(objConn.getOutputStream());
            FileInputStream objFileIn = new FileInputStream("c:\\test.txt");
            while ((nReadCount = objFileIn.read(byteArray)) != -1) {
                objOutput.write(byteArray, 0, nReadCount);
            }
            objOutput.flush();
            objFileIn.close();
            objOutput.close();            String strServerInfo = strTempBuf.toString();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }    public void testServletPost(){
        try {
            StringBuffer strFileInfoBuf = new StringBuffer();            String strProcessURL =
                "http://127.0.0.1/NSSB/MainServletXGMCX"
                    + "?FLAG=sendfile&name=myname";            //connect server
            URL objURL = new URL(strProcessURL);
            //open connect
            HttpURLConnection objConn = (HttpURLConnection) objURL.openConnection();
            //设置允许output
            objConn.setDoOutput(true);
            //设置为post方式
            objConn.setRequestMethod("POST");
            objConn.setUseCaches(false);
            objConn.setRequestProperty("enctype", "multipart/form-data");
            objConn.setRequestProperty("contentType", "charset=GBK");            //get server return message
            // BufferedInputStream objInput = new BufferedInputStream(objConn.getInputStream());
            StringBuffer strTempBuf = new StringBuffer();
            byte[] byteArray = new byte[2048];
            int nReadCount = -1;
            BufferedOutputStream objOutput =
                new BufferedOutputStream(objConn.getOutputStream());
            FileInputStream objFileIn = new FileInputStream("c:\\test.txt");
            while ((nReadCount = objFileIn.read(byteArray)) != -1) {
                objOutput.write(byteArray, 0, nReadCount);
            }
            objOutput.flush();
            objFileIn.close();
            objOutput.close();            String strServerInfo = strTempBuf.toString();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
    
    public static void main(String[] args) {
        //  TestServlet testServlet1 = new TestServlet();
    }
}