📄 servlet 2_3过滤器编程.mht
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tid=3D1635">[JAVA=20
Servlet]<A=20
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href=3D"http://blogger.org.cn/blog/more.asp?name=3Dzhanglincon&id=3D1=
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=B7=A8=A3=BA<BR><BR>1=A3=AE &nbs=
p; void=20
init(FilterConfig config) throws=20
=
ServletException:=D4=DA=B9=FD=C2=CB=C6=F7=D6=B4=D0=D0service=C7=B0=B1=BB=B5=
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p; void=20
=
destroy();=D4=DA=B9=FD=C2=CB=C6=F7=D6=B4=D0=D0service=BA=F3=B1=BB=B5=F7=D3=
=C3=A1=A3<BR><BR>3=A3=AE &=
nbsp; Void=20
doFilter(ServletRequest =
req,ServletResponse=20
res,FilterChain chain) throws=20
=
IOException,ServletException;=D6=B4=D0=D0=CA=B5=BC=CA=B5=C4=B9=FD=C2=CB=B9=
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=A1=AA=A1=AA=D4=DAServlet API 2.3 =
=D7=EE=D6=D5=B7=A2=B2=BC=B8=E52=BA=C5=20
=
=D6=D0=D7=EE=BD=FC=B8=C4=B1=E4=B5=C4=A1=A3=CF=C8=C7=B0=B5=C3=D3=C3setFilt=
erConfig(FilterConfig)=B7=BD=B7=A8=C0=B4=C9=E8=D6=C3=C9=FA=C3=FC=D6=DC=C6=
=DA=A1=A3<BR><BR><BR><BR>=D4=DAdoFilter()=B7=BD=B7=A8=D6=D0=A3=AC=C3=BF=B8=
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R><BR>=D1=AD=D0=F2=BD=A5=BD=F8<BR><BR>=C8=E7=B9=FB=CF=EB=D2=AA=D5=E6=D5=FD=
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=C3=B5=C4=A3=AC=CB=FC=BC=C7=C2=BC=C1=CB=CB=F9=D3=D0=C7=EB=C7=F3=B5=C4=B3=D6=
=D0=F8=CA=B1=BC=E4=A1=A3=D4=DATomcat=20
=
4.0=B7=A2=B2=BC=D6=D0=B1=BB=C3=FC=C3=FB=CE=AAExampleFilter=A1=A3=B4=FA=C2=
=EB=C8=E7=CF=C2=A3=BA<BR><BR><PRE class=3Doverflow title=3D"pre =
code">import java.io.*;<BR><BR>import javax.servlet.*;<BR><BR>import =
javax.servlet.http.*;<BR><BR> <BR><BR>public class TimerFilter =
implements Filter {<BR><BR> <BR><BR> private FilterConfig =
config =3D null;<BR><BR> <BR><BR> public void =
init(FilterConfig config) throws ServletException =
{<BR><BR> this.config =3D =
config;<BR><BR> }<BR><BR> <BR><BR> public void =
destroy() {<BR><BR> config =3D =
null;<BR><BR> }<BR><BR> <BR><BR> public void =
doFilter(ServletRequest request, ServletResponse =
response,<BR><BR> &n=
bsp; =
FilterChain chain) throws IOException, ServletException =
{<BR><BR> long before =3D =
System.currentTimeMillis();<BR><BR> chain.doFilter=
(request, response);<BR><BR> long after =3D =
System.currentTimeMillis();<BR><BR> =
<BR><BR> String name =3D =
"";<BR><BR> if (request instanceof =
HttpServletRequest) {<BR><BR> name =
=3D =
((HttpServletRequest)request).getRequestURI();<BR><BR> &=
nbsp;}<BR><BR> config.getServletContext().log(name=
+ ": " + (after - before) + =
"ms");<BR><BR> }<BR><BR>}</PRE><BR><BR>=B5=B1=B7=FE=CE=F1=C6=F7=
=B5=F7=D3=C3init()=CA=B1=A3=AC=B9=FD=C2=CB=C6=F7=D3=C3config=B1=E4=C1=BF=C0=
=B4=B1=A3=B4=E6=C5=E4=D6=C3=C0=E0=B5=C4=D2=FD=D3=C3=A3=AC=D5=E2=BD=AB=D4=DA=
=BA=F3=C3=E6=B5=C4doFilter()=B7=BD=B7=A8=D6=D0=B1=BB=CA=B9=D3=C3=D2=D4=B8=
=FC=B8=C4ServletContext=A1=A3=B5=B1=B5=F7=D3=C3doFilter()=CA=B1=A3=AC=B9=FD=
=C2=CB=C6=F7=BC=C6=CB=E3=C7=EB=C7=F3=B7=A2=C9=FA=B5=BD=B8=C3=C7=EB=C7=F3=D6=
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=AE=BA=F3=B5=C4=B4=A6=C0=ED=A1=A3=D7=A2=D2=E2doFilter()=B7=BD=B7=A8=B5=C4=
=B2=CE=CA=FD=B2=A2=B2=BB=CA=C7HTTP=B6=D4=CF=F3=A3=AC=D2=F2=B4=CB=D2=AA=B5=
=F7=D3=C3HTTP=D7=A8=D3=C3=B5=C4getRequestURI()=B7=BD=B7=A8=CA=B1=B1=D8=D0=
=EB=BD=ABrequest=D7=AA=BB=AF=CE=AAHttpServletRequest=C0=E0=D0=CD=A1=A3<BR=
><BR><BR><BR>=CA=B9=D3=C3=B4=CB=B9=FD=C2=CB=C6=F7=A3=AC=C4=E3=BB=B9=B1=D8=
=D0=EB=D4=DAweb.xml=CE=C4=BC=FE=D6=D0=D3=C3<filter>=B1=EA=C7=A9=B2=BF=
=CA=F0=CB=FC=A3=AC=BC=FB=CF=C2=A3=BA<BR><BR> =20
<PRE class=3Doverflow title=3D"pre code"> =
<filter><BR><BR> <=
;filter-name>timerFilter</filter-name><BR><BR> =
<filter-class>TimerFilter</filter-=
class><BR><BR></filter></PRE><BR><BR><BR>=D5=E2=BD=AB=CD=A8=D6=AA=
=B7=FE=CE=F1=C6=F7=D2=BB=B8=F6=BD=D0timerFiter=B5=C4=B9=FD=C2=CB=C6=F7=CA=
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=D3=C3=C8=B7=B6=A8=B5=C4URL=C4=A3=CA=BD=BB=F2=CA=B9=D3=C3<filter-mappi=
ng>=B1=EA=C7=A9=C3=FC=C3=FB=B5=C4servelt=20
=
=C0=B4=D7=A2=B2=E1=D2=BB=B8=F6=B9=FD=C2=CB=C6=F7=A3=AC=C8=E7=A3=BA<BR><BR=
><PRE class=3Doverflow title=3D"pre =
code"><filter-mapping><BR><BR> <filter-na=
me>timerFilter</filter-name><BR><BR> <=
url-pattern>/*</url-pattern><BR><BR></filter-mapping></PRE=
><BR><BR><BR>=D5=E2=D6=D6=C5=E4=D6=C3=CA=B9=B9=FD=C2=CB=C6=F7=B2=D9=D7=F7=
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=F2=B6=AF=CC=AC=A3=A9=A3=AC=D5=FD=CA=C7=CE=D2=C3=C7=D0=E8=D2=AA=B5=C4=BC=C6=
=CA=B1=B9=FD=C2=CB=C6=F7=A1=A3=C8=E7=B9=FB=C4=E3=C1=AC=BD=D3=D2=BB=B8=F6=BC=
=F2=B5=A5=B5=C4=D2=B3=C3=E6=A3=AC=BC=C7=C2=BC=CA=E4=B3=F6=BF=C9=C4=DC=C8=E7=
=CF=C2=A3=BA<BR><BR>2001-05-25=20
00:14:11 /timer/index.html:=20
10ms<BR><BR><BR><BR>=D4=DATomcat 4.0 beta=20
=
5=D6=D0=A3=AC=C4=E3=BF=C9=D2=D4=D4=DAserver_root/logs/=CF=C2=D5=D2=B5=BD=B8=
=C3=BC=C7=C2=BC=CE=C4=BC=FE=A1=A3<BR><BR><BR><BR>=B4=CB=B9=FD=C2=CB=C6=F7=
=B5=C4WAR=CE=C4=BC=FE=B4=D3=B4=CB=CF=C2=D4=D8=A3=BA<BR><BR> &n=
bsp; http://www.javaworld.com/jw-06-2001/Filters/timer.war<BR><BR><B=
R><BR>=CB=AD=D4=DA=C4=E3=B5=C4=CD=F8=D5=BE=C9=CF=A3=BF=CB=FB=C3=C7=D4=DA=D7=
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=A5=B5=C4=C2=DF=BC=AD=A3=AC=CF=F1=A1=B0=CB=FB=C3=C7=CA=C7=B7=F1=CA=C7=B4=D3=
robots.txt=C0=B4=B5=C4=C7=EB=C7=F3?=A1=B1=A3=A9=A1=A3=B8=C3=B0=FC=D6=D0=CC=
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=BE=DD=A1=A3<BR><BR><BR><BR>=CE=D2=C3=C7=CF=C8=BF=B4ClickstreamFilter=C0=E0=
=A1=A3=CB=F9=D3=D0=B5=C4=D5=E2=D0=A9=C0=FD=D7=D3=B6=BC=D7=F6=C1=CB=D0=A9=C7=
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