java实现对字符串的加密与解密

1、:package com.test;import java.io.*;/* */public class encipher/ 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 = ;retur

2、n strencodepasswd;strkey = encipherconst.m_strkey1 + encipherconst.m_strkey2 + encipherconst.m_strkey3 + encipherconst.m_strkey4 + encipherconst.m_strkey5 + encipherconst.m_strkey6;while(strpasswd.length() ; 8)strpasswd = strpasswd + (char)1;des = ;for(n = 0; n ; 0) &;&; (code strpasswd.charat(n) ;

3、90)code = (char)(int)code - 1);char mid = 0;int flag;flag = code strpasswd.charat(n);if(flag ; 93)mid = 0; elsemid = strkey.charat(flag); /asc(mid(strkey, (code xor asc(mid(strpasswd, n, 1) + 1, 1)if(code ; 35) &; (code ; 122) &; (code != 124) &; (code != 39) &; (code != 44) &; (mid != 124) &; (mid

4、!= 39) &; (mid != 44)break;/”sqlchar temp = 0;temp = strkey.charat(code strpasswd.charat(n);des = des + (char)code + temp;strencodepasswd = des;return strencodepasswd;/ public static string decodepasswd(string varcode)int n;string des = new string();string strkey = new string();if(varcode = null) |

5、(varcode.length() = 0)return ;strkey = encipherconst.m_strkey1 + encipherconst.m_strkey2 + encipherconst.m_strkey3 + encipherconst.m_strkey4 + encipherconst.m_strkey5 + encipherconst.m_strkey6;if(varcode.length() % 2 = 1)varcode = varcode + ;?;des = ;for(n = 0; n ; 0)return des.substring(0, n); else

6、return des;static class encipherconstpublic 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_strkey3 = ;1234567890-;public fin

7、al 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|+_)(*&;%$#!;public static void main(string args) th