Ò׽ؽØÍ¼Èí¼þ¡¢µ¥Îļþ¡¢Ãâ°²×°¡¢´¿ÂÌÉ«¡¢½ö160KB

Java¼ÓÃܽâÃÜ


Eryptogram.java Îļþ£º
package com.cube.limail.util;
import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import javax.crypto.SecretKey;
/**
 * ¼ÓÃܽâÃÜÀà
 * @author Ò¶Ê÷Éî
 * @version 1.00 2008Äê01ÔÂ03ÈÕ
 */
 public  class  Eryptogram
{
     private  static  String  Algorithm ="DES";
     private String key="CB7A92E3D3491964";
     //¶¨Òå ¼ÓÃÜËã·¨,¿ÉÓà DES,DESede,Blowfish
     static  boolean  debug  = false ;
     /**
     * ¹¹Ôì×Ó×¢½â.
     */
     public  Eryptogram ()
    {
        
    } /**
     * Éú³ÉÃÜÔ¿
     * @return byte[] ·µ»ØÉú³ÉµÄÃÜÔ¿
     * @throws exception ÈÓ³öÒì³£.
     */
     public  static  byte [] getSecretKey () throws  Exception
    {
         KeyGenerator  keygen  = KeyGenerator.getInstance (Algorithm );
         SecretKey  deskey  = keygen.generateKey ();
         System.out.println ("Éú³ÉÃÜÔ¿:"+bytesToHexString (deskey.getEncoded ()));
         if  (debug ) System.out.println ("Éú³ÉÃÜÔ¿:"+bytesToHexString (deskey.getEncoded ()));
         return  deskey.getEncoded ();
        
    } /**
     * ½«Ö¸¶¨µÄÊý¾Ý¸ù¾ÝÌṩµÄÃÜÔ¿½øÐмÓÃÜ
     * @param input ÐèÒª¼ÓÃܵÄÊý¾Ý
     * @param key ÃÜÔ¿
     * @return byte[]


Ïà¹ØÎĵµ£º

Java´íÎó´¦Àí´ó¼¯ºÏ


0¡¢ ÐèÒª±êʶ·û
a) ²»ÔÚº¯ÊýÄÚ
1¡¢ ·Ç·¨±í´ïʽ¿ªÊ¼
b) ¿ÉÄÜ:¶ªÊ§À¨ºÅ .
2. no data found
a) ¿ÉÄÜ:setInt(1,100)ÖÐ,ûÓÐ100Õâ¸öÖµ
3. ÕÒ²»µ½·ûºÅ
a) ¿ÉÄÜ:ûµ¼Èë°ü
4. Ö¸¶¨ÁËÎÞЧURL
a) ¿ÉÄÜ:Êý¾Ý¿âÃû»òIP´íÎó,¼´Á¬½Ó³ö´í
5. Àà·¾¶Ã»ÓÐÕÒµ½
a) ¿ÉÄÜ: ClassNotFoundException: oracle.jdbc.driver.OracleDriv ......

JavaÖеĸ¡µãÊý·ÖÎö

JavaÖеĸ¡µãÊý·ÖÎö
¡¡¡¡¸¡µãÊý·ÖΪµ¥¾«¶ÈºÍË«¾«¶È,JavaÖеĵ¥¾«¶ÈºÍË«¾«¶È·Ö±ðΪfloatºÍdouble.ÄãÃÇÖªµÀfloatºÍdoubleÊÇÔõô´æ´¢µÄÂð?
¡¡¡¡floatÕ¼4¸ö×Ö½Ú,doubleÕ¼8¸ö×Ö½Ú,ΪÁË·½±ãÆð¼û,ÕâÀï¾ÍÖ»ÌÖÂÛfloatÀàÐÍ.
¡¡¡¡floatÆäʵºÍÒ»¸öintÐ͵ĴóСÊÇÒ»ÑùµÄ,Ò»¹²32λ,µÚһλ±íʾ·ûºÅ,2-9±íʾָÊý,ºóÃæ23λ±íʾСÊý²¿·Ö.ÕâÀ ......

java¿ª·¢ÈËÔ±¾­Ñé×ܽá

java¿ª·¢ÈËÔ±¾­Ñé×ܽá-Î人±±´óÇàÄñ
¡¡¡¡·Á¢Ïî
¡¡¡¡Ò»¡¢ÐèÇóµÄÊÕ¼¯£¬UCµÄ±àдËäÈ»²»ÊÇ¿ª·¢ÈËÔ±µÄ¹¤×÷£¬µ«×îÖÕÐèÒª¿ª·¢ÈËÔ±ÔÚ²úÆ·ÖÐʵÏÖ¡£ËùÒÔ¿ª·¢²»ºÏÀíµÄÉè¼ÆÖÁÉÙÀË·ÑÁËÄãµÄʱ¼ä£¬¿ª·¢¼¼ÊõÎÞ·¨ÊµÏÖµÄÉè¼Æ´øÀ´×î´óµÄÍ´¿à£ºÊ§°Ü¡£ËùÒÔ£¬¿ª·¢ÈËÔ±ÒªÖØÊÓÐèÇóÒÔ¼°UCµÄÆÀÉó£¬Ìá³ö×Ô¼ºÄܹ»Ïëµ½µÄËùÓÐÒìÒé¡£
¡¡¡¡¶þ¡¢Ò»¶ ......

JAVA²ÎÊý´«µÝÖµ´«µÝµÄÀí½â¡£

Ê×ÏÈÃ÷ȷһϣºjavaÀïÃæÖ»ÓÐÖµ´«µÝ£¬ÒýÓô«µÝÖ»ÊÇÒ»Ö»Îó¶Á¶øÒÑ¡£
À´¿´Ò»¸öÀý×Ó£º
public static void main(String[] args)
{
StringBuffer str1 = new StringBuffer("hello");
test(str1);
System.out.println("main : " + str1);
}
public static void test(StringBuffer s ......

JAVA¿ª·¢Õß×ȥµÄ20¸öÓ¢ÎÄÍøÕ¾

JAVA¿ª·¢Õß×ȥµÄ20¸öÓ¢ÎÄÍøÕ¾
1.[http://www.javaalmanac.com] – Java¿ª·¢ÕßÄê¼øÒ»ÊéµÄÔÚÏß°æ±¾. ÒªÏë¿ìËٲ鵽ijÖÖJava¼¼ÇɵÄÓ÷¨¼°Ê¾Àý´úÂë, ÕâÊÇÒ»¸ö²»´íµÄÈ¥´¦.
2.[http://www.onjava.com] – O’ReillyµÄJavaÍøÕ¾. ÿÖܶ¼ÓÐÐÂÎÄÕÂ.
3.[http://java.sun.com] – ¹Ù·½µÄJava¿ª·¢ÕßÍøÕ¾ ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ