Android和Java两平台通用的MD5加密

package com.example.com.applicationdemo.utils;

import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

/**
* MD5加密
*/
public class MD5 {

/** * 获取MD5加密结果 * @param str 要加密的字符串 * @return 获取MD5加密结果 */public static String getDigest(String str) {    MessageDigest messageDigest = null;    try {        messageDigest = MessageDigest.getInstance("MD5");        messageDigest.reset();        messageDigest.update(str.getBytes("UTF-8"));    } catch (NoSuchAlgorithmException e) {        e.printStackTrace();    } 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]));    }    return md5StrBuff.toString().toUpperCase();}public static void main(String[] args) {    MD5 md = new MD5();    String content = "Hello worid!";    String pStr = md.getDigest(content);    String pStr1 = md.getDigest(content);    System.out.println("加密前1：" + content);    System.out.println("加密后1: " + pStr1);    System.out.println("加密后 : " + pStr); }

}