JSP的LOGIN程序代码 (1)

 JSP的LOGIN程序代码

＜!-- LOGIN MANAGER --＞
＜JAVA TYPE="CLASS"＞

PUBLIC STATIC BOOLEAN CHECKUSERPERMISSION(HTTPSESSION MYSESSION, HTTPSERVLETREQUEST REQUEST,

HTTPSERVLETRESPONSE RESPONSE)
{
IF (MYSESSION.GETVALUE("HASPERMISSION") == NULL || !((BOOLEAN) MYSESSION.GETVALUE

("HASPERMISSION" )).BOOLEANVALUE())
{
STRING REQUESTEDURL = HTTPUTILS.GETREQUESTURL(REQUEST).TOSTRING();
STRING QUERYSTRING = REQUEST.GETQUERYSTRING();
IF (QUERYSTRING != NULL)
{
REQUESTEDURL = REQUESTEDURL + "" + QUERYSTRING;
}
REQUESTEDURL = RESPONSE.ENCODEURL(REQUESTEDURL);
MYSESSION.PUTVALUE("REQUESTEDURL", REQUESTEDURL);
RETURN FALSE;
}
ELSE
{
RETURN TRUE;
}
}

＜/JAVA＞

＜%
// JSP文件
STRING GOODUSER = "BILL";
STRING GOODPASS = "BOBO";
HTTPSESSION MYSESSION = REQUEST.GETSESSION(TRUE);
STRING ERRORMESSAGE = "PLEASE LOGIN TO ACCESS THE PAGE YOU REQUESTED";
BOOLEAN LOGINATTEMPT = FALSE;
STRING MYMETHOD = REQUEST.GETMETHOD();
IF (REQUEST.GETPARAMETERVALUES("CLICK") != NULL && REQUEST.GETPARAMETERVALUES ("CLICK")

[0].TRIM().EQUALS("LOG IN"))
{
LOGINATTEMPT = TRUE;
}

IF (LOGINATTEMPT)
{
STRING USERNAME = REQUEST.GETPARAMETERVALUES("USER")[0].TRIM();
STRING PASSWORD = REQUEST.GETPARAMETERVALUES("PASS")[0].TRIM();
//OUT.PRINTLN("USERNAME = |" + USERNAME + "| & PASSWORD = |" + PASSWORD + "|＜BR＞");
IF (GOODUSER.EQUALS(USERNAME) && GOODPASS.EQUALS(PASSWORD))
{
RESPONSE.SENDREDIRECT((STRING)MYSESSION.GETVALUE("REQUESTEDURL"));
MYSESSION.PUTVALUE("HASPERMISSION", NEW BOOLEAN(TRUE));
ERRORMESSAGE = "UNABLE TO REDIRECT: " + (STRING) MYSESSION.GETVALUE("REQUESTEDURL");
}
ELSE
{
ERRORMESSAGE = "YOU DID NOT GET THE USERNAME OR PASSWORD RIGHT";
}
}
ELSE
{
ERRORMESSAGE = "HAVEN’T TRIED LOGGING IN YET.";
IF (MYSESSION.GETVALUE("REQUESTEDURL") == NULL)
{
MYSESSION.PUTVALUE("REQUESTEDURL", "/INDEX.JSP");
}
//OUT.PRINTLN("SET USERREFERRER TO " + MYSESSION.GETVALUE("REDIRECTTO") + "＜BR＞");
}
%＞

＜CENTER＞
＜FONT COLOR=RED＞＜%=ERRORMESSAGE%＞＜/FONT＞
＜TABLE ALIGN=CENTER＞
＜FORM ACTION="ADMINLOGIN2.JSP" METHOD=POST NAME="LOGIN"＞
＜TR＞
＜TD＞USERNAME:＜/TD＞
＜TD＞＜INPUT TYPE=TEXT NAME=USER VALUE=""＞＜/TD＞
＜/TR＞
＜TR＞
＜TD＞PASSWORD:＜/TD＞
＜TD＞＜INPUT TYPE=PASSWORD NAME=PASS VALUE=""＞＜/TD＞
＜/TR＞
＜TR＞
＜TD COLSPAN=2 ALIGN=CENTER＞＜INPUT TYPE=SUBMIT NAME=CLICK VALUE="LOG IN"＞ ＜/TD＞
＜/TR＞
＜/FORM＞
＜/TABLE＞
＜/CENTER＞
ORIGINAL URL: ＜%= (STRING)MYSESSION.GETVALUE("REQUESTEDURL") %＞
＜SCRIPT LANGUAGE="JAVASCRIPT"＞
// ＜!--
IF (DOCUMENT.FORMS.LOGIN != NULL)
DOCUMENT.FORMS.LOGIN.USER.FOCUS();
// --＞
＜/SCRIPT＞ 

　　5.11 CHECKBOX在JSP中的使用方法

＜%@ PAGE LANGUAGE="JAVA" CONTENTTYPE="TEXT/HTML" %＞
＜%@