Java使用异或运算实现简单的加密解密算法实例代码

java;">package cn.std.util;import java.nio.charset.Charset;public class DeEnCode {	private static final String key0 = "FECOI()*&<MNCXZPKL";	private static final Charset charset = Charset.forName("UTF-8");	private static byte[] keyBytes = key0.getBytes(charset);	public static String encode(String enc){		byte[] b = enc.getBytes(charset);		for (int i=0,size=b.length;i<size;i++){			for (byte keyBytes0:keyBytes){				b[i] = (byte) (b[i]^keyBytes0);			}		}		return new String(b);	}	public static String decode(String dec){		byte[] e = dec.getBytes(charset);		byte[] dee = e;		for (int i=0,size=e.length;i<size;i++){			for (byte keyBytes0:keyBytes){				e[i] = (byte) (dee[i]^keyBytes0);			}		}		return new String(e);	}	public static void main(String[] args) {		String s="you are right";		String enc = encode(s);		String dec = decode(enc);		System.out.println(enc);		System.out.println(dec);	}}

public static String setEncrypt(String str){	String sn="ziyu";	//密钥	int[] snNum=new int[str.length()];	String result="";	String temp="";	for (int i=0,j=0;i<str.length();i++,j++){		if(j==sn.length())		        j=0;		snNum[i]=str.charAt(i)^sn.charAt(j);	}	for (int k=0;k<str.length();k++){		if(snNum[k]<10){			temp="00"+snNum[k];		} else{			if(snNum[k]<100){				temp="0"+snNum[k];			}		}		result+=temp;	}	return result;}public static String getEncrypt(String str){	String sn="ziyu";	//密钥	char[] snNum=new char[str.length()/3];	String result="";	for (int i=0,j=0;i<str.length()/3;i++,j++){		if(j==sn.length())		        j=0;		int n=Integer.parseint(str.substring(i*3,i*3+3));		snNum[i]=(char)((char)n^sn.charAt(j));	}	for (int k=0;k<str.length()/3;k++){		result+=snNum[k];	}	return result;}}