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

java µ½Êý¾Ý¿â


public ActionForward backUpAction(ActionMapping mapping, ActionForm form,   
            HttpServletRequest request, HttpServletResponse response)   
            throws Exception {   
       
           Calendar cDay = Calendar.getInstance();   
           SimpleDateFormat myf = new SimpleDateFormat("yyyyMMddHHmmss");   
           String day = myf.format(cDay.getTime());   
           // »ñµÃConstantÖж¨ÒåµÄÊý¾Ý¿â±¸·ÝÎļþ´æ·Å·¾¶£¬¸ñʽÈ磺   
          // public static final String DataBaseBackUpPath = "D:\\sOADB\\";   
    String outputFile = Constant.DataBaseBackUpPath;   
           // Èç¹û·þÎñÆ÷¶ËÓ²ÅÌÉϲ»´æÔÚoutputFileĿ¼£¬Ôò´´½¨Õâ¸öĿ¼   
           File mydir = new File(outputFile);   
           if (!(mydir.exists())) {   
               mydir.mkdir();   
           }   
        
           // ±¸·ÝÎļ


Ïà¹ØÎĵµ£º

java jdbc µ÷Óà oracle´æ´¢¹ý³Ì ·µ»ØÓαê

1.´´½¨²âÊÔ±í
create table users(
userid int primary key,
username varchar2(20),
userpwd  varchar2(20)
);
insert into users values(1,'test','test');
insert into users values(2,'test','test');
insert into users values(3,'test','test');
insert into users values(4,'test','test');
insert i ......

java mysql ºº×Ö´æÈëʱÂÒÂë


´ÓÍøÂçÕª³­µ½µÄ½â¾ö·½·¨——
½â¾ö·½·¨¶þ£º
      Á¬½Ómysqlʱ(ÎÞÂÛÔÚ´Ómysql¶Á»¹ÊÇÈ¡Êý¾ÝµÄÇé¿ö)£¬Ö¸¶¨Ê¹ÓõıàÂ뷽ʽΪutf-8£¬¾ßÌå´úÂëÈçÏÂ
      //×°ÔØmysql-jdbcÇý¶¯
       Class.forName("com.mysql.jdbc.Driver" ......

Java IOµÄÒ»°ãʹÓÃÔ­Ôò

Java IOµÄÒ»°ãʹÓÃÔ­Ôò£º
Ò»¡¢°´Êý¾ÝÀ´Ô´£¨È¥Ïò£©·ÖÀࣺ
1¡¢ÊÇÎļþ£º FileInputStream, FileOutputStream, FileReader, FileWriter
2¡¢ÊÇbyte[]£ºByteArrayInputStream, ByteArrayOutputStream
3¡¢ÊÇChar[]: CharArrayReader, CharArrayWriter
4¡¢ÊÇString: StringBufferInputStream, StringReader, StringWriter
5¡¢ ......

ÎÒÊÇÈçºÎÓÃJavaÇÀµ½CaoLiuÉçÇøµÄÑûÇëÂëµÄ£¬Ñ§ÒÔÖÂÓÃ

ÔÚºÍгµÄÍøÂçÊÀ½çÖУ¬ÓÐÒ»¸öÉñÃØµÄÀÖÔ°£¬½ÐCaoLiuÉçÇø£¨ÓÉÓÚºÍг£¬ÓÃÁËÆ´Òô£©£¬ÕâÊÇÒ»¸ö´«ËµµÄËùÔÚ£¬ÆäÈë¿ÚÈ纣ÊÐò×Â¥Ò»°ã²»¿É×½Ãþ£¬ÓÐÈË˵ÕâÊÇΪÁ˸øÊÀÈËÔì³ÉÒ»ÖÖÉñÃØ¸Ð£¬Ò²ÓÐÈË˵£¬ÕâÊÇΪÁ˶ã±ÜÉñÊÞºÓзµÄ׷ɱ¡£ÓÐÐÒ£¬ÎÒÕÒµ½ÁËÕâ¸öÈë¿Ú¡£µ«ÊDz»ÐÒµÄÊÇ£¬TMD×¢²áÕ˺Ż¹ÒªÑûÇëÂë¡£
      »¹ºÃ£¬Õâ¸öÊÀ ......

³õʶJavaÃæÏò¶ÔÏóµÄÌØÐÔ

OOPµÄÌØÐÔÖ÷ÒªÓУº1¡¢·â×°£»2¡¢¼Ì³Ð£»3¡¢¶à̬¡£ÏÂÃæ´ÓÕ⼸¸ö·½Ãæ¾ßÌå²ûÊö¡£
1¡¢·â×°
·â×°Äܽ«ÀàµÄ¾ßÌåÐÅÏ¢Òþ²ØÆðÀ´£¬Ê¹µÃÊý¾ÝµÃµ½±£»¤¡£Æä¾ßÌåʵʩÖ÷ÒªÊÇÒÀ¿¿·ÃÎÊ¿ØÖÆ»úÖÆÈ¨ÏÞ£¬ÆäȨÏÞÖ÷ÒªÓÐËÄÖÖ£º1¡¢private£»2¡¢default£¨C++ûÓÐÕâÖÖȨÏÞ£©£»3¡¢protected£»4¡¢public¡£ÔÚÕâËÄÖÖȨÏÞϵÄÊý¾ÝÔÚÍâ½çµÄ¿É¼ûÐÔ²»Í¬¡£Private ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ