java实现的加密解密

package com.zhang.dao;
public class Encipher{
// 加密
public static String EncodePasswd(String strPasswd){
String strEncodePasswd = new String("");
int i;
int n;
char code;
String des = new String();
String strKey = new String();
if((strPasswd == null) || strPasswd.length() == 0){
strEncodePasswd = "";
return strEncodePasswd;
}
strKey = EncipherConst.m_strKey1 + EncipherConst.m_strKey2 + EncipherConst.m_strKey + EncipherConst.m_strKey4 + EncipherConst.m_strKey5 + EncipherConst.m_strKey6;
while(strPasswd.length() < 8){
strPasswd = strPasswd + (char)1;
}
des = "";
for(n = 0; n <= strPasswd.length() - 1; n++){
while(true){
code = (char)Math.rint(Math.random() * 100);
while((code > 0) && (((code ^ strPasswd.charAt(n)) < 0) || ((code ^ strPasswd.charAt(n)) > 90))){
code = (char)((int)code - 1);
}
char mid = 0;
int flag;
flag = code ^ strPasswd.charAt(n);
if(flag > 9){
mid = 0;
}else{
mid = strKey.charAt(flag);
}
if((code > 5) & (code < 122) & (code != 124) & (code != 9) & (code != 44) & (mid != 124) & (mid != 9) & (mid != 44)){
break;
}
//确保生成的字符是可见字符并且在SQL语句中有效
}
char temp = 0;
temp = strKey.charAt(code ^ strPasswd.charAt(n));
des = des + (char)code + temp;
}
strEncodePasswd = des;
return strEncodePasswd;
}
// 解密
public static String DecodePasswd(String varCode){
int n;
String des = new String();
String strKey = new String();
if((varCode == null) || (varCode.length() == 0)){
return "";
}
strKey = EncipherConst.m_strKey1 + EncipherConst.m_strKey2 + EncipherConst.m_strKey + EncipherConst.m_strKey4 + EncipherConst.m_strKey5 + EncipherConst.m_strKey6;
if(varCode.length() % 2 == 1){
varCode = varCode + "?";
}
des = "";
for(n = 0; n <= varCode.length() / 2 - 1; n++){
char b;
b = varCode.charAt(n * 2);
int a;
a = (int)strKey.indexOf(varCode.charAt(n * 2 + 1));
des = des + (char)((int)b ^ a);
}
n = des.indexOf(1);
if(n > 0){
return des.substring(0, n);
} else{
return des;
}
}

static class EncipherConst{
public final static String m_strKey1 = "zxcvbnm,./asdfg";
public final static String m_strKeya = "cjk;";
public final static String m_strKey2 = "hjkl;'qwertyuiop";
public final static String m_strKeyb = "cai2";
public final static String m_strKey = "[]\\124567890-";
public final static String m_strKeyc = "%^@#";
public final static String m_strKey4 = "=` ZXCVBNM<>?:LKJ";
public final static String m_strKeyd = "*(N";
public final static String m_strKey5 = "HGFDSAQWERTYUI";
public final static String m_strKeye = "%^HJ";
public final static String m_strKey6 = "OP{}|+_)(*&^%$#@!~";
}
// 测试
public static void main(String[] args) throws Exception{
String pas = "12" ;
String encodePas = EncodePasswd(pas);
System.out.println(encodePas);
String decodePas = DecodePasswd(encodePas);
System.out.println(decodePas);
}
}