java实现的RC4加密解密算法示例

public static String HloveyRC4(String aInput,String aKey){    int[] iS = new int[256];    byte[] iK = new byte[256];    for (int i=0;i<256;i++)      iS[i]=i;    int j = 1;    for (short i= 0;i<256;i++)    {      iK[i]=(byte)aKey.charAt((i % aKey.length()));    }    j=0;    for (int i=0;i<255;i++)    {      j=(j+iS[i]+iK[i]) % 256;      int temp = iS[i];      iS[i]=iS[j];      iS[j]=temp;    }    int i=0;    j=0;    char[] iInputChar = aInput.toCharArray();    char[] iOutputChar = new char[iInputChar.length];    for(short x = 0;x<iInputChar.length;x++)    {      i = (i+1) % 256;      j = (j+iS[i]) % 256;      int temp = iS[i];      iS[i]=iS[j];      iS[j]=temp;      int t = (iS[i]+(iS[j] % 256)) % 256;      int iY = iS[t];      char iCY = (char)iY;      iOutputChar[x] =(char)( iInputChar[x] ^ iCY) ;    }    return new String(iOutputChar);}

public static void main(String[] args) {  String inputStr = "做个好男人";  String key = "abcdefg";  String str = HloveyRC4(inputStr,key);  //打印加密后的字符串  System.out.println(str);  //打印解密后的字符串  System.out.println(HloveyRC4(str,key));}