java MD5加密

import java.security.MessageDigest;
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import java.security.NoSuchAlgorithmException;
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public class Encrypt {
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   public static void main(String[] args) {
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      long l = 123456;
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      String t = "login";
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      MessageDigest md = null;
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      try {
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         md = MessageDigest.getInstance("MD5");
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      } catch (NoSuchAlgorithmException e) {
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         e.printStackTrace();
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      }
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      //加密,接收byte[]数组,需要转换
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      byte[] sResult = md.digest(t.getBytes());
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      byte[] lResult = md.digest(String.valueOf(l).getBytes());
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      String result1 = ByteConvertString(sResult);
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      String result2 = ByteConvertString(lResult);
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      System.out.println(result1);
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      System.out.println(result2);
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   }
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   /**
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    *把经过加密的byte数组转换为string
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    **/
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   private static String ByteConvertString(byte[] bResult){
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      StringBuffer sb = new StringBuffer();
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      for(int i=0;i<bResult.length;i++){
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         int val = ((int)bResult[i]) & 0xff;//和11111111相与
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         if(val < 16){
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            sb.append("0");
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         }
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         sb.append(Integer.toHexString(val));
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      }
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      return sb.toString();
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   }
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}


摘自 George.Le的博客

补充：综合编程 , 安全编程 ,