jsp 加密解密问题


des.java:package Lion.Security.Cryptography;import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.SecretKey;
import java.security.NoSuchAlgorithmException;
import java.security.Security;public class des {
    private String Algorithm = "DES";
    private KeyGenerator keygen;
    private SecretKey deskey;
    private Cipher c;
    private byte[] cipherByte;    
    public des() {
          init();
    }    public void init() {
        Security.addProvider(new com.sun.crypto.provider.SunJCE());
        try {
               keygen = KeyGenerator.getInstance(Algorithm);
               deskey = keygen.generateKey();
               c = Cipher.getInstance(Algorithm);
         }
         catch(NoSuchAlgorithmException ex){
            ex.printStackTrace();
        }
         catch(NoSuchPaddingException ex){
            ex.printStackTrace();
        }
       }    
     public byte[] createEncryptor(String str) {
        try {
             c.init(Cipher.ENCRYPT_MODE, deskey);
             cipherByte = c.doFinal(str.getBytes());
        }
        catch(java.security.InvalidKeyException ex){
            ex.printStackTrace();
        }
        catch(javax.crypto.BadPaddingException ex){
            ex.printStackTrace();
        }
        catch(javax.crypto.IllegalBlockSizeException ex){
            ex.printStackTrace();
0
        return cipherByte;
     }    
     public String createDecryptor(byte[] buff) {
        try {
           c.init(Cipher.DECRYPT_MODE, deskey);
           cipherByte = c.doFinal(buff);
        }
        catch(java.security.InvalidKeyException ex){
            ex.printStackTrace();
        }
        catch(javax.crypto.BadPaddingException ex){
            ex.printStackTrace();
        }
        catch(javax.crypto.IllegalBlockSizeException ex){
            ex.printStackTrace();
        }
        return (new String(cipherByte));
     }
} des.jsp:<head><%@page contentType="text/HTML;charset=gb2312"%>
<jsp:useBean id="des" scope="page" class="Lion.Security.Cryptography.des" />
String Test = request.getParameter("Test");
if(Test==null || Test.equals("")) {
%>
    <form name="form" method="post">
    <input type="text" name="Test" size="25" value=""/>
    <input type="submit" name="button" value=" 确定 "/>
    </form>
    <%
}else{
            out.println("加密前的数据："+Test +"<br/>");
            out.println("加密后的数据："+des.createEncryptor(Test) +"<br/>");
byte[] temp;   //问题在这里
temp=des.createEncryptor(Test);
out.print(temp);
out.println("解密后的数据："+des.createDecryptor(des.createEncryptor(Test)) +"<br/>");
      }
    %>
为什么out.println("加密后的数据："+des.createEncryptor(Test) +"<br/>");
和out.print(temp);的内容是不一样的呢 而且temp的内容一直在变（刷新就变）
如果我要把byte[] 的内容变成string 是不是 string.valueof（byte[]）就行了