Java实现MD5加密
import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
public class MD5 {
/**
* @param args
*/
public static void main(String[] args)
{
// TODO Auto-generated method stub
String s = "http://hi.baidu.com/new/kissorz";
System.out.println(getMD5Str(s));
}
/*
* MD5加密
*/
private static String getMD5Str(String str) {
MessageDigest messageDigest = null;
try {
messageDigest = MessageDigest.getInstance("MD5");
messageDigest.reset();
messageDigest.update(str.getBytes("UTF-8"));
} catch (NoSuchAlgorithmException e) {
System.out.println("NoSuchAlgorithmException caught!");
System.exit(-1);
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
byte[] byteArray = messageDigest.digest();
StringBuffer md5StrBuff = new StringBuffer();
for (int i = 0; i < byteArray.length; i++) {
if (Integer.toHexString(0xFF & byteArray[i]).length() == 1)
md5StrBuff.append("0").append(Integer.toHexString(0xFF & byteArray[i]));
else
md5StrBuff.append(Integer.toHexString(0xFF & byteArray[i]));
}
//16位加密，从第9位到25位，则将相应的数字改为8，24
return md5StrBuff.substring(0, 32).toString().toUpperCase();
}
}