71 lines
1.9 KiB
Java
71 lines
1.9 KiB
Java
package com.adc.da.util;
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import java.security.MessageDigest;
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import java.text.SimpleDateFormat;
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import java.util.Date;
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/**
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* 采用MD5加密解密
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* @author tfq
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* @datetime 2011-10-13
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*/
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public class MD5Util {
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/***
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* MD5加码 生成32位md5码
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*/
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public static String string2MD5(String inStr){
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MessageDigest md5 = null;
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try{
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md5 = MessageDigest.getInstance("MD5");
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}catch (Exception e){
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System.out.println(e.toString());
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e.printStackTrace();
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return "";
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}
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char[] charArray = inStr.toCharArray();
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byte[] byteArray = new byte[charArray.length];
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for (int i = 0; i < charArray.length; i++)
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byteArray[i] = (byte) charArray[i];
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byte[] md5Bytes = md5.digest(byteArray);
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StringBuffer hexValue = new StringBuffer();
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for (int i = 0; i < md5Bytes.length; i++){
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int val = ((int) md5Bytes[i]) & 0xff;
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if (val < 16)
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hexValue.append("0");
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hexValue.append(Integer.toHexString(val));
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}
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return hexValue.toString();
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}
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/**
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* 加密解密算法 执行一次加密，两次解密
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*/
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public static String convertMD5(String inStr){
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char[] a = inStr.toCharArray();
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for (int i = 0; i < a.length; i++){
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a[i] = (char) (a[i] ^ 't');
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}
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String s = new String(a);
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return s;
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}
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// 测试主函数
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public static void main(String args[]) {
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/* String s = new String("tangfuqiang");
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System.out.println("原始：" + s);
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System.out.println("MD5后：" + string2MD5(s));
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System.out.println("加密的：" + convertMD5(s));
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System.out.println("解密的：" + convertMD5(convertMD5(s)));*/
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SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH");
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String time = df.format(new Date());
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System.out.println(time);
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}
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} |