??????????е???????????С???
???????????????? ???????[ 2010/8/27 9:23:44 ] ????????
????3.2 ????????????
??????????????????????????????????????????????????????????????????SessionID???y????????????Session?????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????ν?????????????????????????в???
????session?????????????????????????????????????????session??????????????????????????????·????μ??
?????????????java??jspд??demo???????????????session?л????????????·??????????
??????????????????jsp????????????????????
<img src="CheckCode.jsp" border="0" alt="???....... ???????? CheckCode.jsp ????????????????
????CheckCode.jsp???????????
String sRand="";
for (int i=0;i<4;i++){
String rand=String.valueOf(random.nextInt(10)); //?????????
sRand+=rand;
}
session.setAttribute("rand"??sRand); ????????????session??
????????????£??????????????????????????????????????????????????????????????????????????????????????????????????session?????
??????
???·???
??????????????????
2023/3/23 14:23:39???д?ò??????????
2023/3/22 16:17:39????????????????????Щ??
2022/6/14 16:14:27??????????????????????????
2021/10/18 15:37:44???????????????
2021/9/17 15:19:29???·???????·
2021/9/14 15:42:25?????????????
2021/5/28 17:25:47??????APP??????????
2021/5/8 17:01:11