QQ炫舞网吧安装常见问题解决办法

package com.test;

import java.security.MessageDigest;

public class MD5 {

/**
* @param args
*/
public static void main(String[] args) throws Exception {
String md5 = md5("测试数据");
System.out.println(md5);

}

public static String md5(String data) throws Exception{
String md5 = "";
MessageDigest md = MessageDigest.getInstance("MD5");
md.update(data.getBytes());
byte[] rs = md.digest();
md5 = toHex(rs);
return md5;
}

public static String toHex(byte[] rs){
StringBuilder sb = new StringBuilder("");
for (int i = 0; i < rs.length; i++) {
int h = ((rs[i]>>4) & 0x0f);
int l = rs[i] & 0x0f;

sb.append(h > 9 ? (char)((h - 10) + 'a') : (char)(h + '0'));
sb.append(l > 9 ? (char)((l - 10) + 'a') : (char)(l + '0'));
}
return sb.toString();
}

}