package io.itjun.basic.math;

import java.security.MessageDigest;

import java.security.NoSuchAlgorithmException;

import java.util.Locale;

/**

* 字符串转md5

*/

public class MD5 {

public static void main(String[] args) throws NoSuchAlgorithmException {

String password = "123456";

System.out.println(MD5.get(password));

}

public static String get(String str) {

try {

MessageDigest md5 = MessageDigest.getInstance("MD5");

byte[] bytes = md5.digest(str.getBytes());

StringBuilder builder = new StringBuilder();

for (byte b : bytes) {

int value = b & 0xff;

if (value >> 4 == 0) {// 运算符右移补0

builder.append("0").append(Integer.toHexString(value));

} else {

builder.append(Integer.toHexString(value));

}

}

return builder.toString().toLowerCase(Locale.ROOT);

} catch (NoSuchAlgorithmException e) {

e.printStackTrace();

throw new RuntimeException(e.getMessage());

}

}

}