📄 12.2 servlet事件监听器.mht
字号:
}
else if =
(document.getElementById("searchKind5").checked=3D=3Dtrue)
{=20
szType=3D5;
}
=20
if(szType=3D=3D1)
=
loc=3D"http://book.csdn.net/book/morelz.aspx?key=3D"+escape(document.getE=
lementById("txtTopKey").value);
else if(szType=3D=3D2)
=
loc=3D"http://club.book.csdn.net/book/s.aspx?key=3D"+escape(document.getE=
lementById("txtTopKey").value);
else if(szType=3D=3D3)
=
loc=3D"http://club.book.csdn.net/tag/"+escape(document.getElementById("tx=
tTopKey").value)+"/1.html";
else if(szType=3D=3D5)
=
loc=3D"http://www.baidu.com/s?wd=3Dsite%3Abook.csdn.net%20"+document.getE=
lementById("txtTopKey").value+"&cl=3D3";
else
=
loc=3D"http://www.google.cn/search?q=3Dsite%3Abook.csdn.net%20"+document.=
getElementById("txtTopKey").value;
if(szType<=3D3)
self.location=3Dloc;
else
window.open(loc,"gsearch");
=20
}=20
}
</SCRIPT>
<DIV class=3DsearchMain>
<DL=20
style=3D"BORDER-RIGHT: #5992ac 1px solid; PADDING-RIGHT: 2px; =
BORDER-TOP: #5992ac 1px solid; PADDING-LEFT: 2px; PADDING-BOTTOM: 2px; =
BORDER-LEFT: #5992ac 1px solid; PADDING-TOP: 2px; BORDER-BOTTOM: #5992ac =
1px solid">
<DD=20
style=3D"PADDING-RIGHT: 5px; PADDING-LEFT: 240px; PADDING-BOTTOM: 5px; =
PADDING-TOP: 5px; BACKGROUND-COLOR: #95c4d9"><INPUT=20
class=3DsearchDi id=3DtxtTopKey size=3D70> <INPUT=20
onclick=3D"SearchBook_Top();return false;" type=3Dimage=20
=
src=3D"http://book.csdn.net/images2/search.gif"> =CD=
=BC=CA=E9=C6=B7=D6=D6=A3=BA<FONT=20
color=3D#ff0000><B>235680</B></FONT>=D6=D6<BR><INPUT id=3DsearchKind1 =
type=3Dradio=20
CHECKED name=3Daa> <LABEL for=3DsearchKind1>=CA=E9=D3=D1=BB=E1</LABEL> =
<INPUT=20
id=3DsearchKind2 type=3Dradio name=3Daa> <LABEL =
for=3DsearchKind2>=C1=AC=D4=D8</LABEL> =20
<INPUT id=3DsearchKind3 type=3Dradio name=3Daa> <LABEL=20
for=3DsearchKind3>Tag</LABEL> <INPUT id=3DsearchKind4 =
type=3Dradio name=3Daa>=20
<LABEL for=3DsearchKind4><FONT =
color=3D#800080>=D3=C3Google=BD=F8=D0=D0=C8=AB=CE=C4=BC=EC=CB=F7</FONT></=
LABEL> =20
<INPUT id=3DsearchKind5 type=3Dradio name=3Daa> <LABEL =
for=3DsearchKind5><FONT=20
=
color=3D#800080>=D3=C3=B0=D9=B6=C8=BD=F8=D0=D0=C8=AB=CE=C4=BC=EC=CB=F7</F=
ONT></LABEL>=20
<DT=20
style=3D"PADDING-RIGHT: 5px; PADDING-LEFT: 245px; PADDING-BOTTOM: 5px; =
PADDING-TOP: 5px">=C8=C8=C3=C5=CB=D1=CB=F7=A3=BA=20
<A =
href=3D"http://club.book.csdn.net/book/s.aspx?key=3DASP.NET">ASP.NET</A> =
<A=20
href=3D"http://club.book.csdn.net/book/s.aspx?key=3DAjax">Ajax</A> <A=20
href=3D"http://club.book.csdn.net/book/s.aspx?key=3DSpring">Spring</A> =
<A=20
=
href=3D"http://club.book.csdn.net/book/s.aspx?key=3DHibernate">Hibernate<=
/A> <A=20
href=3D"http://club.book.csdn.net/book/s.aspx?key=3DJava">Java</A>=20
</DT></DL></DIV><LINK href=3D"http://book.csdn.net/css/newindex2.css"=20
type=3Dtext/css rel=3Dstylesheet>
<DIV id=3Dwrapper>
<DIV id=3DinnerWrapper>
<DIV id=3DmainWrappe>
<DIV id=3DpageContent>
<DIV class=3Dcol1><!-- title -->
<DIV class=3DarcTitle style=3D"WIDTH: 100%">
<H1 style=3D"WIDTH: 100%">
<SCRIPT src=3D"http://wz.csdn.net/javascripts/vote.js"></SCRIPT>
<A =
href=3D"http://book.csdn.net/bookfiles/410">JSP=CD=F8=C2=E7=B1=E0=B3=CC=B4=
=D3=C8=EB=C3=C5=B5=BD=BE=AB=CD=A8 </A></H1>
<DIV style=3D"FONT-SIZE: 15px; TEXT-ALIGN: center"><A=20
href=3D"http://book.csdn.net/bookfiles/410/10041014863.shtml">12.2=20
Servlet=CA=C2=BC=FE=BC=E0=CC=FD=C6=F7 </A></DIV>
<DIV style=3D"FONT-SIZE: 15px; TEXT-ALIGN: center"><A class=3Durl=20
href=3D"http://book.csdn.net/">http://book.csdn.net/</A> 2007-6-20 =
16:23:00 </DIV>
<DIV class=3Dclear></DIV>
<DIV=20
style=3D"BORDER-RIGHT: #0b5f98 1px solid; BORDER-TOP: #0b5f98 1px solid; =
FLOAT: left; MARGIN: 0px auto; BORDER-LEFT: #0b5f98 1px solid; WIDTH: =
600px; BORDER-BOTTOM: #0b5f98 1px solid">
<DIV=20
style=3D"PADDING-RIGHT: 1px; PADDING-LEFT: 1px; FLOAT: left; =
PADDING-BOTTOM: 1px; WIDTH: 16px; COLOR: white; PADDING-TOP: 1px; =
BACKGROUND-COLOR: #0b5f98">=CD=BC=CA=E9=B5=BC=B6=C1=20
</DIV>
<DIV=20
style=3D"PADDING-LEFT: 2px; FLOAT: right; WIDTH: 570px; LINE-HEIGHT: =
16pt; TEXT-ALIGN: left"><!--=B5=BC=B6=C1-->
<H1 id=3DdivCurrentNode=20
style=3D"PADDING-LEFT: 2px; FONT-SIZE: 12px; WIDTH: 100%; COLOR: =
#b83507; TEXT-ALIGN: left">=B5=B1=C7=B0=D5=C2=BD=DA:<A=20
href=3D"http://book.csdn.net/bookfiles/410/10041014863.shtml"><FONT =
color=3Dred>12.2=20
Servlet=CA=C2=BC=FE=BC=E0=CC=FD=C6=F7</FONT></A></H1>
<DIV id=3DdivRelateNode style=3D"PADDING-LEFT: 2px">
<DIV style=3D"FLOAT: left; WIDTH: 49%">=A1=A4<A=20
href=3D"http://book.csdn.net/bookfiles/410/10041014860.shtml">=C4=BF=C2=BC=
</A></DIV>
<DIV style=3D"FLOAT: right; WIDTH: 49%">=A1=A4<A=20
href=3D"http://book.csdn.net/bookfiles/410/10041014861.shtml">=C7=B0=D1=D4=
</A></DIV>
<DIV style=3D"FLOAT: left; WIDTH: 49%">=A1=A4<A=20
href=3D"http://book.csdn.net/bookfiles/410/10041014862.shtml">12.1=20
Servlet=B9=FD=C2=CB=C6=F7</A></DIV>
<DIV style=3D"FLOAT: right; WIDTH: 49%">=A1=A4<A=20
href=3D"http://book.csdn.net/bookfiles/410/10041014864.shtml">12.3 =
=B1=BE=D5=C2=D0=A1=BD=E1</A></DIV>
<DIV style=3D"FLOAT: left; WIDTH: 49%">=A1=A4<A=20
href=3D"http://book.csdn.net/bookfiles/410/10041014865.shtml">16.1 =
=B9=A6=C4=DC=CB=B5=C3=F7</A></DIV>
<DIV style=3D"FLOAT: right; WIDTH: 49%">=A1=A4<A=20
href=3D"http://book.csdn.net/bookfiles/410/10041014866.shtml">16.2=20
=CA=B5=CF=D6=B9=A6=C4=DC</A></DIV></DIV></DIV></DIV>
<DIV class=3Dclear></DIV></DIV><!-- main -->
<DIV id=3Dmain>
<DIV id=3Dtext>
<DIV id=3Dcsdn_zhaig_ad_yahoo_2></DIV><LINK href=3D"css.css" =
type=3Dtext/css=20
rel=3Dstylesheet>
<H3>12.2 Servlet=CA=C2=BC=FE=BC=E0=CC=FD=C6=F7</H3>
<P=20
class=3DMsoNormal>=D4=DAServlet=BC=BC=CA=F5=D6=D0=D2=D1=BE=AD=B6=A8=D2=E5=
=C1=CB=D2=BB=D0=A9=CA=C2=BC=FE=A3=AC=B2=A2=C7=D2=CE=D2=C3=C7=BF=C9=D2=D4=D5=
=EB=B6=D4=D5=E2=D0=A9=CA=C2=BC=FE=C0=B4=B1=E0=D0=B4=CF=E0=B9=D8=B5=C4=CA=C2=
=BC=FE=BC=E0=CC=FD=C6=F7=A3=AC=B4=D3=B6=F8=B6=D4=CA=C2=BC=FE=D7=F7=B3=F6=CF=
=E0=D3=A6=B4=A6=C0=ED=A1=A3Servlet=CA=C2=BC=FE=D6=F7=D2=AA=D3=D03=C0=E0=A3=
=BAServlet=C9=CF=CF=C2=CE=C4=CA=C2=BC=FE=A1=A2=BB=E1=BB=B0=CA=C2=BC=FE=D3=
=EB=C7=EB=C7=F3=CA=C2=BC=FE=A1=A3=CF=C2=C3=E6=BE=DF=CC=E5=BD=B2=BD=E2=D5=E2=
3=C0=E0=CA=C2=BC=FE=B5=C4=BC=E0=CC=FD=C6=F7=CA=B5=CF=D6=A1=A3</P>
<P =
class=3D4>1=A3=AE=B6=D4Servlet=C9=CF=CF=C2=CE=C4=BD=F8=D0=D0=BC=E0=CC=FD<=
/P>
<P=20
class=3DMsoNormal>=BF=C9=D2=D4=BC=E0=CC=FDServletContext=B6=D4=CF=F3=B5=C4=
=B4=B4=BD=A8=BA=CD=C9=BE=B3=FD=D2=D4=BC=B0=CA=F4=D0=D4=B5=C4=CC=ED=BC=D3=A1=
=A2=C9=BE=B3=FD=BA=CD=D0=DE=B8=C4=B5=C8=B2=D9=D7=F7=A1=A3=B8=C3=BC=E0=CC=FD=
=C6=F7=D0=E8=D2=AA=CA=B9=D3=C3=B5=BD=C8=E7=CF=C2=C1=BD=B8=F6=BD=D3=BF=DA=C0=
=E0=A3=BA</P>
<P class=3Da1 style=3D"MARGIN-LEFT: 39pt; TEXT-INDENT: =
-21pt"> =A1=F1=20
ServletContextAttributeListener=A3=BA=BC=E0=CC=FD=B6=D4ServletContext=CA=F4=
=D0=D4=B5=C4=B2=D9=D7=F7=A3=AC=C8=E7=D4=F6=BC=D3=A1=A2=C9=BE=B3=FD=A1=A2=D0=
=DE=B8=C4=B2=D9=D7=F7=A1=A3</P>
<P class=3Da1 style=3D"MARGIN-LEFT: 39pt; TEXT-INDENT: =
-21pt"> =A1=F1=20
ServletContextListener=A3=BA=BC=E0=CC=FDServletContext=A3=AC=B5=B1=B4=B4=BD=
=A8ServletContext=CA=B1=A3=AC=BC=A4=B7=A2contextInitialized=20
(ServletContextEvent=20
sce)=B7=BD=B7=A8=A3=BB=B5=B1=CF=FA=BB=D9ServletContext=CA=B1=A3=AC=BC=A4=B7=
=A2contextDestroyed(ServletContext- Event sce)=B7=BD=B7=A8=A1=A3</P>
<P class=3D4>2=A3=AE=BC=E0=CC=FDHttp=BB=E1=BB=B0</P>
<P=20
class=3DMsoNormal>=BF=C9=D2=D4=BC=E0=CC=FDHttp=BB=E1=BB=B0=BB=EE=B6=AF=C7=
=E9=BF=F6=A1=A2Http=BB=E1=BB=B0=D6=D0=CA=F4=D0=D4=C9=E8=D6=C3=C7=E9=BF=F6=
=A3=AC=D2=B2=BF=C9=D2=D4=BC=E0=CC=FDHttp=BB=E1=BB=B0=B5=C4active=A1=A2paa=
sivate=C7=E9=BF=F6=B5=C8=A1=A3=B8=C3=BC=E0=CC=FD=C6=F7=D0=E8=D2=AA=CA=B9=D3=
=C3=B5=BD=C8=E7=CF=C2=B6=E0=B8=F6=BD=D3=BF=DA=C0=E0=A3=BA</P>
<P class=3Da1 style=3D"MARGIN-LEFT: 39pt; TEXT-INDENT: =
-21pt"> =A1=F1=20
HttpSessionListener=A3=BA=BC=E0=CC=FDHttpSession=B5=C4=B2=D9=D7=F7=A1=A3=B5=
=B1=B4=B4=BD=A8=D2=BB=B8=F6Session=CA=B1=A3=AC=BC=A4=B7=A2session =
Created=20
(SessionEvent =
se)=B7=BD=B7=A8=A3=BB=B5=B1=CF=FA=BB=D9=D2=BB=B8=F6Session=CA=B1=A3=AC=BC=
=A4=B7=A2sessionDestroyed (HttpSessionEvent=20
se) =B7=BD=B7=A8=A1=A3</P>
<P class=3Da1 style=3D"MARGIN-LEFT: 39pt; TEXT-INDENT: =
-21pt"> =A1=F1=20
HttpSessionActivationListener=A3=BA=D3=C3=D3=DA=BC=E0=CC=FDHttp=BB=E1=BB=B0=
active=A1=A2passivate=C7=E9=BF=F6=A1=A3</P>
<P class=3Da1 style=3D"MARGIN-LEFT: 39pt; TEXT-INDENT: =
-21pt"> =A1=F1=20
HttpSessionAttributeListener=A3=BA=BC=E0=CC=FDHttpSession=D6=D0=CA=F4=D0=D4=
=B5=C4=B2=D9=D7=F7=A1=A3=B5=B1=D4=DASession=D4=F6=BC=D3=D2=BB=B8=F6=CA=F4=
=D0=D4=CA=B1=A3=AC=BC=A4=B7=A2attributeAdded(HttpSessionBindingEvent=20
se) =
=B7=BD=B7=A8=A3=BB=B5=B1=D4=DASession=C9=BE=B3=FD=D2=BB=B8=F6=CA=F4=D0=D4=
=CA=B1=A3=AC=BC=A4=B7=A2attributeRemoved(HttpSessionBindingEvent=20
se)=B7=BD=B7=A8=A3=BB=D4=DASession=CA=F4=D0=D4=B1=BB=D6=D8=D0=C2=C9=E8=D6=
=C3=CA=B1=A3=AC=BC=A4=B7=A2attributeReplaced(HttpSessionBindingEvent se) =
=B7=BD=B7=A8=A1=A3</P>
<P =
class=3D4>3=A3=AE=B6=D4=BF=CD=BB=A7=B6=CB=C7=EB=C7=F3=BD=F8=D0=D0=BC=E0=CC=
=FD</P>
<P =
class=3DMsoNormal>=B6=D4=BF=CD=BB=A7=B6=CB=B5=C4=C7=EB=C7=F3=BD=F8=D0=D0=BC=
=E0=CC=FD=CA=C7=D4=DAServlet =
2.4=B9=E6=B7=B6=D6=D0=D0=C2=CC=ED=BC=D3=B5=C4=D2=BB=CF=EE=BC=BC=CA=F5=A3=AC=
=CA=B9=D3=C3=B5=C4=BD=D3=BF=DA=C0=E0=C8=E7=CF=C2=A3=BA</P>
<P class=3Da1 style=3D"MARGIN-LEFT: 39pt; TEXT-INDENT: =
-21pt"> =A1=F1=20
ServletRequestListener=BD=D3=BF=DA=C0=E0=A1=A3</P>
<P class=3Da1 style=3D"MARGIN-LEFT: 39pt; TEXT-INDENT: =
-21pt"> =A1=F1=20
ServletRequestAttrubuteListener=BD=D3=BF=DA=C0=E0=A1=A3</P>
<H3>12.2.1 =
Servlet=C9=CF=CF=C2=CE=C4=BC=E0=CC=FD=C6=F7=CA=B5=C0=FD</H3>
<P=20
class=3DMsoNormal>=CF=C2=C3=E6=B1=E0=D0=B4=D2=BB=B8=F6=CA=B5=C0=FD=A3=AC=CA=
=B9=CB=FC=C4=DC=B9=BB=B6=D4ServletContext=D2=D4=BC=B0=CA=F4=D0=D4=BD=F8=D0=
=D0=BC=E0=CC=FD=A1=A3=D3=C9=D2=D4=C9=CF=BD=E9=C9=DC=BF=C9=D6=AA=A3=AC=B8=C3=
=C0=E0=D0=E8=D2=AA=CA=B5=CF=D6ServletContextAttributeListener=BA=CDServle=
tContextListener=BD=D3=BF=DA=C0=E0=A3=AC=C6=E4=CF=EA=CF=B8=B4=FA=C2=EB=C8=
=E7=CF=C2=A3=BA</P>
<P class=3Da2>package servlet;</P>
<P class=3Da2>import java.io.FileOutputStream;</P>
<P class=3Da2>import java.io.PrintWriter;</P>
<P class=3Da2>import javax.servlet.ServletContext;</P>
<P class=3Da2>import javax.servlet.ServletContextAttributeEvent;</P>
<P class=3Da2>import javax.servlet.ServletContextAttributeListener;</P>
<P class=3Da2>import javax.servlet.ServletContextEvent;</P>
<P class=3Da2>import javax.servlet.ServletContextListener;</P>
<P class=3Da2>public class MyServletContextListener </P>
<P=20
class=3Da2> &n=
bsp; =20
implements ServletContextListener,ServletContextAttributeListener{</P>
<P class=3Da2> private=20
ServletContext context =3D=20
null; &n=
bsp; &nb=
sp; &nbs=
p;=20
=20
//=B6=A8=D2=E5=D2=BB=B8=F6ServletContext=B6=D4=CF=F3=B1=E4=C1=BF=A3=AC=B8=
=B3=CE=AAnull</P>
<P class=3Da2> public =
void=20
contextInitialized(ServletContextEvent s) {</P>
<P=20
class=3Da2> &n=
bsp; =20
//TODO =
=B8=C3=B7=BD=B7=A8=CA=B5=CF=D6=C1=CBServletContextListener=BD=D3=BF=DA=B6=
=A8=D2=E5=B5=C4=B7=BD=B7=A8=A3=AC=B6=D4ServletContext=BD=F8=D0=D0=B3=F5=CA=
=BC=BB=AF</P>
<P=20
class=3Da2> &n=
bsp; =20
this.context =3D=20
s.getServletContext(); &nb=
sp; &nbs=
p; =20
//=B3=F5=CA=BC=BB=AF=D2=BB=B8=F6ServletContext=B6=D4=CF=F3</P>
<P=20
class=3Da2> &n=
bsp; =20
print("ServletContext=B3=F5=CA=BC=BB=AF......"); &=
nbsp; &n=
bsp; &nb=
sp; =20
//=B4=F2=D3=A1=B3=F6=B8=C3=B7=BD=B7=A8=B5=C4=B2=D9=D7=F7=D0=C5=CF=A2</P>
<P class=3Da2> }</P>
<P class=3Da2> public =
void=20
contextDestroyed(ServletContextEvent s) {</P>
<P=20
class=3Da2> &n=
bsp; =20
//TODO =
=B8=C3=B7=BD=B7=A8=CA=B5=CF=D6=C1=CBServletContextListener=BD=D3=BF=DA=C0=
=E0=B6=A8=D2=E5=B7=BD=B7=A8=A3=AC=D3=C3=D3=DA=CA=CD=B7=C5ServletContext=B6=
=D4=CF=F3</P>
<P=20
class=3Da2> &n=
bsp; =20
this.context =3D null;</P>
<P=20
class=3Da2> &n=
bsp; =20
print("ServletContext=B1=BB=CA=CD=B7=C5......");</P>
<P class=3Da2> }</P>
<P class=3Da2> public =
void=20
attributeAdded(ServletContextAttributeEvent sa) {</P>
<P=20
class=3Da2> &n=
bsp; =20
//TODO =
=B5=B1=C9=CF=CF=C2=CE=C4=CC=ED=BC=D3=CA=F4=D0=D4=CA=B1=A3=AC=BD=AB=B5=F7=D3=
=C3=B8=C3=B7=BD=B7=A8=A1=A3=D5=E2=C0=EF=D6=BB=CA=C7=BD=AB=CC=ED=BC=D3=B5=C4=
=CA=F4=D0=D4=D0=C5=CF=A2=B4=F2=D3=A1=B3=F6=C0=B4</P>
<P=20
class=3Da2> &n=
bsp; =20
print("=D4=F6=BC=D3ServletContext=B6=D4=CF=F3=B5=C4=D2=BB=B8=F6=CA=F4=D0=D4=
=A3=BAattributeAdded('"+sa.getName()+"','=20
"+sa.getValue()+"')");</P>
<P class=3Da2> }</P>
<P class=3Da2> public =
void=20
attributeRemoved(ServletContextAttributeEvent sa) {</P>
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