JAVA 的MD5加密算法源代码

Java 的MD5加密算法源代码

import java.security.*;

import java.security.spec.*;

class MD5_Test{

public final static String MD5(String s){

char hexDigits[] = {

´0´, ´1´, ´2´, ´3´, ´4´, ´5´, ´6´, ´7´, ´8´, ´9´, ´a´, ´b´, ´c´, ´d´,

´e´, ´f´};

try {

byte[] strTemp = s.getBytes();

MessageDigest mdTemp = MessageDigest.getInstance("MD5");

mdTemp.update(strTemp);

byte[] md = mdTemp.digest();

int j = md.length;

char str[] = new char[j * 2];

int k = 0;

for (int i = 0; i < j; i++) {

byte byte0 = md[i];

str[k++] = hexDigits[byte0 >>> 4 & 0xf];

str[k++] = hexDigits[byte0 & 0xf];

}

return new String(str);

}

catch (Exception e){

return null;

}

}

public static void main(String[] args){

//MD5_Test aa = new MD5_Test();

System.out.print(MD5_Test.MD5("XX"));

}