MD5加密与Hash加密

 1 实现代码：
 2 public class MD5 {
 3     /**
 4      * MD5方法
 5      * 
 6      * @param text 明文
 7      * @param key 密钥
 8      * @return 密文
 9      * @throws Exception
10      */
11     public static String md5(String text, String key) throws Exception {
12         //加密后的字符串
13         String encodeStr=DigestUtils.md5Hex(text + key);
14         System.out.println("MD5加密后的字符串为:encodeStr="+encodeStr);
15         return encodeStr;
16         }
17 
18 }

 1 public static void main(String[] args) throws NoSuchAlgorithmException, UnsupportedEncodingException {
 2 
 3     
 4     String ps = "111111ieou";
 5 
 6     MessageDigest messageDigest;
 7     messageDigest = MessageDigest.getInstance("SHA-256");
 8     messageDigest.update(ps.getBytes("UTF-8"));
 9     String encodeStr = byte2Hex(messageDigest.digest());
10 
11     System.out.println(encodeStr);
12 
13 }
14 
15 private static String byte2Hex(byte[] bytes) {
16     StringBuilder stringBuffer = new StringBuilder();
17     String temp = null;
18     for (int i = 0; i < bytes.length; i++) {
19         temp = Integer.toHexString(bytes[i] & 0xFF);
20         if (temp.length() == 1) {
21         //1得到一位的进行补0操作
22             stringBuffer.append("0");
23         }
24         stringBuffer.append(temp);
25     }
26     return stringBuffer.toString();
27 }