Java | Java实现的MD5加密工具类

将字符串进行MD5加密

package com.java.util;

import java.security.MessageDigest;

public final class MD5Util
{
    public static synchronized String getMD5(String inStr)
    {
        MessageDigest md5 = null;
        try
        {
            md5 = MessageDigest.getInstance("MD5");
        }
        catch (Exception e)
        {
            System.out.println(e.toString());
            e.printStackTrace();
            return ";";
        }
        char[] charArray = inStr.toCharArray();
        byte[] byteArray = new byte[charArray.length];
        for (int i = 0; i < charArray.length; i++) {
            byteArray[i] = (byte) charArray[i];
        }
        byte[] md5Bytes = md5.digest(byteArray);
        StringBuffer hexValue = new StringBuffer();
        for (int i = 0; i < md5Bytes.length; i++)
        {
            int val = ((int)md5Bytes[i]) & 0xff;
            if (val < 16) {
                hexValue.append("0");
            }
            hexValue.append(Integer.toHexString(val));
        }
        return hexValue.toString();
    }
}