标签：java instance lap psd md5 cat encode encoder 一个
java中用MessageDigest类，可以用来加密MD5。
首先创建一个MessageDigest对象
MessageDigest digest = MessageDigest.getInstance("MD5");
调用digest.digest(psd.getBytes());会返回一个16位的字符串，然后使用规定的模板转换为32位即可。
for (byte b : bs) { String hexString = Integer.toHexString(b & 0xff); if (hexString.length() < 2) { hexString = "0" + hexString; } stringBuffer.append(hexString); }
完整的代码：
1 import java.security.MessageDigest; 2 import java.security.NoSuchAlgorithmException; 3 4 public class Md5Util { 5 6 /** 7 * @param args 8 */ 9 public static void main(String[] args) { 10 String psd = "123"; 11 encoder(psd); 12 } 13 14 private static void encoder(String psd) { 15 try { 16 MessageDigest digest = MessageDigest.getInstance("MD5"); 17 byte[] bs = digest.digest(psd.getBytes()); 18 System.out.println(bs.length); 19 StringBuffer stringBuffer = new StringBuffer(); 20 for (byte b : bs) { 21 String hexString = Integer.toHexString(b & 0xff); 22 if (hexString.length() < 2) { 23 hexString = "0" + hexString; 24 } 25 stringBuffer.append(hexString); 26 } 27 System.out.println(stringBuffer.toString()); 28 } catch (NoSuchAlgorithmException e) { 29 e.printStackTrace(); 30 } 31 32 } 33 34 }
标签：java instance lap psd md5 cat encode encoder 一个
原文地址：http://www.cnblogs.com/xingkongyihao/p/7511365.html
