怎么用java applet 访问asp

Call ASP:  AppletContext context=getAppletContext();
  String url="http:www:8080:/myAsp.asp";
       try{
           if (url!=null){
             context.showDocument(new URL(url),target);
          }
         }catch(Exception e1){
              JOptionPane.showMessageDialog(null, "alert", "Call ASP Error !", JOptionPane.ERROR_MESSAGE);
            }

楼上的不是用的post方式而是有的get方式

import java.awt.*;
import java.applet.*;
import java.awt.event.*;
import java.math.*;
import java.util.*;
import netscape.javascript.*;
public class LoginApplet extends java.applet.Applet implements ActionListener{

BigInteger E;
BigInteger N;
final int BLOCKSIZE = 16;
BigInteger ciphertext[] = new BigInteger[100];
String cipher;

TextField text1,text2;
Button button1,button2;
Label label1,label2,label3;

public void init(){
super.init();
String pkn,pke;
pkn=getParameter("pkn");
pke=getParameter("pke");
BigInteger biPke=new BigInteger(pke,16);
BigInteger biPkn=new BigInteger(pkn,16);
E=biPke;
N=biPkn;
Font f = new Font("Helvetica", Font.BOLD, 14);
setLayout(null);
addNotify();
resize(266,106);
label1=new Label("用户登录");
label1.setLocation(2,2);
label1.setSize(120,24);
add(label1);
label2=new Label("用户名:");
label2.setLocation(2,28);
label2.setSize(36,24);
add(label2);
label3=new Label("密码:");
label3.setLocation(2,54);
label3.setSize(36,24);
add(label3);
text1=new TextField();
text1.setLocation(39,28);
text1.setSize(120,24);
add(text1);
text2=new TextField();
text2.setLocation(39,54);
text2.setSize(120,24);
text2.setEchoChar('*');
add(text2);
button1=new Button("确定");
button1.setLocation(164,28);
button1.setSize(40,24);
button1.addActionListener(this);
add(button1);
button2=new Button("取消");
button2.setLocation(164,54);
button2.setSize(40,24);
button2.addActionListener(this);
add(button2);
}

public void actionPerformed(ActionEvent event) {
        Object src = event.getSource();
if(src==button2){
text1.setText("");
text2.setText("");
}
else if(src==button1){
String uid,pwd;
uid=text1.getText().trim();
pwd=text2.getText().trim();
int nUID=uid.length();
int nPWD=pwd.length(); if(nUID>3 && nUID <16 && nPWD>5 && nPWD<16){
uid=Encrypt(uid);
pwd=Encrypt(pwd);
try{
JSObject mainWindow = JSObject.getWindow(this);
JSObject document = (JSObject) mainWindow.getMember("document");
JSObject loginForm = (JSObject) document.getMember("loginForm");
        JSObject username = (JSObject) loginForm.getMember("username");
JSObject password = (JSObject) loginForm.getMember("password");
        username.setMember("value",uid);
password.setMember("value",pwd);
mainWindow.eval("javascript:submitUser()");
}catch(Exception e){
}
}
else{
try{
JSObject mainWindow = JSObject.getWindow(this);
mainWindow.eval("alert('用户名长度必须在4到15之间，密码长度必须在6到15之间！')");
}catch(Exception e){
}
}
}
}

public String Encrypt(String msg) {
        byte swap[] = msg.getBytes();
        byte segment[];
        String str = null,str1=null;

        int copies = swap.length / BLOCKSIZE;
        if (swap.length % BLOCKSIZE > 0) copies++;
        for (int i = 0; i < copies; i++) {
            segment = copyBytes(i, swap);
            ciphertext[i] = new BigInteger(segment);
            ciphertext[i] = ciphertext[i].modPow(E, N);
            if (str == null){
str=ciphertext[i].toString(16);
if(str.length()%2!=0) str="0"+str;
}
            else{
str1 = ciphertext[i].toString(16);
if(str1.length()%2!=0) str1="0"+str1;
str=str+str1;
}
        }
        return str;
    }


    private byte[] copyBytes(int x, byte tmp[]) {
        byte swap[] = new byte[BLOCKSIZE];
        int count = 0;
        for (int i = x * BLOCKSIZE; i < (x+1) * BLOCKSIZE; i++) {
            if (i >= tmp.length) break;
            swap[count++] = tmp[i];
        }
        return swap;
    }
}

这是我用RSA实现安全登录的一个程序，注意其中当button1被按下的部分，通过mainWindow。eval调用页面中的javascript函数，实现提交。<%@ page language="java" import="BaseRSA"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html>
<head>
<title>User Login</title>
<script language="javascript">

</script>
</head>
<body>
<jsp:useBean id="chkuser" scope="session" class="BaseRSA"/>
<form action="checkUser.jsp" method="post" name="loginForm">
<input type="hidden" name="username" value="">
<input type="hidden" name="password" value="">
<applet code="LoginApplet.class" width="206" height="90" MAYSCRIPT>
<param name="pke" value="<jsp:getProperty name="chkuser" property="pke"/>">
<param name="pkn" value="<jsp:getProperty name="chkuser" property="pkn"/>">
</applet>
</form>
</body>
</html>在Applet所在的页面需要MAYSCRIPT属性

netscape.javascript.JSObject类在你的机器里肯定有，用操作系统的搜索功能，包含文字“JSObject”找到文件，把它的内容解压缩到你的工作目录就可以了

把BaseRSA.java一起给你吧
import java.math.*;
import java.security.SecureRandom;public class BaseRSA{
  private String pkn;
  private String pke;
  private String pkd;  public BaseRSA(){  }  public String getPke(){
    if(pke==null)
  generatePQNTED();
   return pke;
  }  public String getPkd(){
    if(pkd==null)
  generatePQNTED();
   return pkd;
  }  public String getPkn(){
    if(pkn==null)
  generatePQNTED();
    return pkn;
  }  public void setPke(String pke){  }  public void setPkd(){  }  public void setPkn(){  }  private void generatePQNTED() {
BigInteger P, Q, N, E, D, T;  //P,Q:两个大素数  N,E:公钥  D:私钥
BigInteger ZERO = new BigInteger("0");
    BigInteger ONE = new BigInteger("1");
   SecureRandom rand = new SecureRandom(); //创建一个随机数发生器 E = new BigInteger(64,10,rand);  //把字符串e中的奇数转换成大数
     if (E.mod(new BigInteger("2")).equals(ZERO))
E=E.add(new BigInteger("1")); //如果是偶数，+1
     do {
         P = new BigInteger(128, 10, rand); //用随机数发生器产生的随机数产生128位的素数（概率为1-1/pow(2,10))
         Q = new BigInteger(128, 10, rand);
         T = (P.subtract(ONE)).multiply(Q.subtract(ONE)); //T=(P-1)*(Q-1)
     } while (!(E.gcd(T)).equals(ONE));  //E和T的最大公因子不为1（不互质）
     N = P.multiply(Q); // N=P*Q
     BigInteger tmp[] = Euclid(E, T);//用欧几里德扩展法计算解密密钥
     D = tmp[0]; //D为解密密钥（私钥）
pkn=N.toString(16);
pke=E.toString(16);
pkd=D.toString(16);
   } //用欧几里德扩展法计算解密密钥
    private BigInteger[] Euclid(BigInteger x, BigInteger y) {
  BigInteger ZERO = new BigInteger("0");
      BigInteger ONE = new BigInteger("1");      int n = 2;
      BigInteger r[] = new BigInteger[3];
      BigInteger q[] = new BigInteger[3];
      BigInteger u[] = new BigInteger[3];
      BigInteger v[] = new BigInteger[3];      r[0] = x;
      r[1] = y;
      u[0] = new BigInteger("1");
      v[0] = new BigInteger("0");
      u[1] = new BigInteger("0");
      v[1] = new BigInteger("1");
      while (!r[(n-1)%3].equals(ZERO)) {
        q[n%3] = r[(n-2)%3].divide(r[(n-1)%3]);
        r[n%3] = r[(n-2)%3].remainder(r[(n-1)%3]);
        // Un = Un-2 - QnUn-1
        u[n%3] = u[(n-2)%3].subtract(q[n%3].multiply(u[(n-1)%3]));
        // Vn = Vn-2 - QnVn-1
        v[n%3] = v[(n-2)%3].subtract(q[n%3].multiply(v[(n-1)%3]));
        n++;
      }
      BigInteger result[] = new BigInteger[2];
      result[0] = u[(n-2)%3];
      result[1] = v[(n-2)%3];
      return result;
    }
}

调试易

怎么用java applet 访问asp

解决方案 »