📄 servlet 2_3过滤器编程.mht
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=E1=CE=A2=B5=C4=D0=DE=B8=C4=D2=D4=B8=F1=CA=BD=BB=AF=B2=A2=D0=DE=B8=C4=C1=CB=
=D0=A9=BF=C9=D2=C6=D6=B2=D0=D4=CE=CA=CC=E2=A3=AC=D5=E2=CE=D2=BD=AB=D4=DA=BA=
=F3=C3=E6=BD=AB=B5=BD=A1=A3<BR><PRE class=3Doverflow title=3D"pre =
code"><BR>import java.io.IOException;<BR><BR>import =
javax.servlet.*;<BR><BR>import javax.servlet.http.*;<BR><BR> =
<BR><BR>public class ClickstreamFilter implements Filter =
{<BR><BR> protected FilterConfig =
filterConfig;<BR><BR> private final static String =
FILTER_APPLIED =3D "_clickstream_filter_applied";<BR><BR> =
<BR><BR> public void init(FilterConfig config) throws =
ServletException {<BR><BR> this.filterConfig =3D =
filterConfig;<BR><BR> }<BR><BR> <BR><BR> public =
void doFilter(ServletRequest request, ServletResponse =
response,<BR><BR> &n=
bsp; FilterChain chain) =
throws IOException, ServletException {<BR><BR> // =
=C8=B7=B1=A3=B8=C3=B9=FD=C2=CB=C6=F7=D4=DA=C3=BF=B4=CE=C7=EB=C7=F3=D6=D0=D6=
=BB=B1=BB=CA=B9=D3=C3=D2=BB=B4=CE<BR><BR> if =
(request.getAttribute(FILTER_APPLIED) =3D=3D null) =
{<BR><BR> request.setAttribute(FILTER_=
APPLIED, =
Boolean.TRUE);<BR><BR> HttpSession =
session =3D =
((HttpServletRequest)request).getSession();<BR><BR> &nbs=
p; Clickstream stream =3D =
(Clickstream)session.getAttribute("clickstream");<BR><BR> &nbs=
p; stream.addRequest(((HttpServletRequest)request));<BR>=
<BR> }<BR><BR> <BR><BR> // =
=B4=AB=B5=DD=C7=EB=C7=F3<BR><BR> chain.doFilter(re=
quest, response);<BR><BR> }<BR><BR> =
<BR><BR> public void destroy() { =
}<BR><BR>}</PRE><BR><BR><BR>doFilter()=B7=BD=B7=A8=C8=A1=B5=C3=D3=C3=BB=A7=
=B5=C4session=A3=AC=B4=D3=D6=D0=BB=F1=C8=A1Clickstream=A3=AC=B2=A2=BD=AB=B5=
=B1=C7=B0=C7=EB=C7=F3=CA=FD=BE=DD=BC=D3=B5=BDClickstream=D6=D0=A1=A3=C6=E4=
=D6=D0=CA=B9=D3=C3=C1=CB=D2=BB=B8=F6=CC=D8=CA=E2=B5=C4FILTER_APPLIED=B1=EA=
=BC=C7=CA=F4=D0=D4=C0=B4=B1=EA=D7=A2=B4=CB=B9=FD=C2=CB=C6=F7=CA=C7=B7=F1=D2=
=D1=BE=AD=B1=BB=B5=B1=C7=B0=C7=EB=C7=F3=CA=B9=D3=C3=A3=A8=BF=C9=C4=DC=BB=E1=
=D4=DA=C7=EB=C7=F3=B5=F7=B6=C8=D6=D0=B7=A2=C9=FA=A3=A9=B2=A2=C7=D2=BA=F6=C2=
=D4=CB=F9=D3=D0=C6=E4=CB=FB=B5=C4=B9=FD=C2=CB=C6=F7=D0=D0=CE=AA=A1=A3=C4=E3=
=BF=C9=C4=DC=D2=C9=BB=F3=B9=FD=C2=CB=C6=F7=CA=C7=D4=F5=C3=B4=D6=AA=B5=C0=B5=
=B1=C7=B0session=D6=D0=D3=D0clickstream=CA=F4=D0=D4=A1=A3=C4=C7=CA=C7=D2=F2=
=CE=AAClickstreamLogger=D4=DA=BB=E1=BB=B0=D2=BB=BF=AA=CA=BC=CA=B1=BE=CD=D2=
=D1=BE=AD=C9=E8=D6=C3=C1=CB=CB=FC=A1=A3ClickstreamLogger=B4=FA=C2=EB=A3=BA=
<BR><BR><PRE class=3Doverflow title=3D"pre code">import =
java.util.*;<BR><BR>import javax.servlet.*;<BR><BR>import =
javax.servlet.http.*;<BR><BR> <BR><BR>public class ClickstreamLogger =
implements =
ServletContextListener,<BR><BR> =
&=
nbsp; &n=
bsp; HttpSessi=
onListener {<BR><BR> Map clickstreams =3D new =
HashMap();<BR><BR> <BR><BR> public ClickstreamLogger() { =
}<BR><BR> <BR><BR> public void =
contextInitialized(ServletContextEvent sce) =
{<BR><BR> sce.getServletContext().setAttribute("cl=
ickstreams", clickstreams);<BR><BR> }<BR><BR> =
<BR><BR> public void contextDestroyed(ServletContextEvent =
sce) =
{<BR><BR> sce.getServletContext().setAttribute("cl=
ickstreams", null);<BR><BR> }<BR><BR> =
<BR><BR> public void sessionCreated(HttpSessionEvent hse) =
{<BR><BR> HttpSession session =3D =
hse.getSession();<BR><BR> Clickstream clickstream =
=3D new =
Clickstream();<BR><BR> session.setAttribute("click=
stream", =
clickstream);<BR><BR> clickstreams.put(session.get=
Id(), clickstream);<BR><BR> }<BR><BR> =
<BR><BR> public void sessionDestroyed(HttpSessionEvent hse) =
{<BR><BR> HttpSession session =3D =
hse.getSession();<BR><BR> Clickstream stream =3D =
(Clickstream)session.getAttribute("clickstream");<BR><BR> &nbs=
p; clickstreams.remove(session.getId());<BR><BR> }<BR><BR=
>}<BR><BR> </PRE><BR> =20
=
logger=A3=A8=BC=C7=C2=BC=C6=F7=A3=A9=BB=F1=C8=A1=D3=A6=D3=C3=CA=C2=BC=FE=B2=
=A2=BD=AB=CA=B9=D3=C3=CB=FB=C3=C7=BD=AB=CB=F9=D3=D0=B6=AB=CE=F7=B0=EF=B6=A8=
=D4=DA=D2=BB=C6=F0=A1=A3=B5=B1context=B4=B4=BD=A8=D6=D0=A3=AClogger=D4=DA=
context=D6=D0=B7=C5=D6=C3=C1=CB=D2=BB=B8=F6=B9=B2=CF=ED=B5=C4=C1=F7map=A1=
=A3=D5=E2=CA=B9=B5=C3clickstream.jsp=D2=B3=C3=E6=D6=AA=B5=C0=B5=B1=C7=B0=BB=
=EE=B6=AF=B5=C4=CA=C7=C4=C4=B8=F6=C1=F7=A1=A3=B6=F8=D4=DAcontext=CF=FA=BB=
=D9=D6=D0=A3=AClogger=D4=F2=D2=C6=B3=FD=B4=CBmap=A1=A3=B5=B1=D2=BB=B8=F6=D0=
=C2=B7=C3=CE=CA=D5=DF=B4=B4=BD=A8=D2=BB=B8=F6=D0=C2=B5=C4=BB=E1=BB=B0=CA=B1=
=A3=AClogger=BD=AB=D2=BB=B8=F6=D0=C2=B5=C4Clickstream=CA=B5=C0=FD=B7=C5=C8=
=EB=B4=CB=BB=E1=BB=B0=D6=D0=B2=A2=BD=AB=B4=CBClickstream=BC=D3=C8=EB=B5=BD=
=D6=D0=D0=C4=C1=F7map=D6=D0=A1=A3=D4=DA=BB=E1=BB=B0=CF=FA=BB=D9=CA=B1=A3=AC=
=D3=C9logger=B4=D3=D6=D0=D0=C4map=D6=D0=D2=C6=B3=FD=D5=E2=B8=F6=C1=F7=A1=A3=
<BR><BR><BR><BR>=CF=C2=C3=E6=B5=C4web.xml=B2=BF=CA=F0=C3=E8=CA=F6=C6=AC=B6=
=CE=BD=AB=CB=F9=D3=D0=B6=AB=CE=F7=D0=B4=D4=DA=D2=BB=BF=E9=A3=BA<BR><BR>&n=
bsp; =20
<PRE class=3Doverflow title=3D"pre code"> =
<filter><BR><BR> =
<filter-name>clickstreamFilter</filter-name><BR><BR> &nb=
sp; =
<filter-class>ClickstreamFilter</filter-class><BR><BR> &=
nbsp; </filter></PRE><BR><BR><BR><BR> =20
<PRE class=3Doverflow title=3D"pre code"> =
<filter-mapping><BR><BR> &=
nbsp; =
<filter-name>clickstreamFilter</filter-name><BR><BR> &nb=
sp; =
<url-pattern>*.jsp</url-pattern><BR><BR> &nb=
sp;</filter-mapping><BR><BR> =
<BR><BR> <filter-mapping><BR><BR>  =
; =
<filter-name>clickstreamFilter</filter-name><BR><BR> &nb=
sp; =
<url-pattern>*.html</url-pattern><BR><BR> &n=
bsp;</filter-mapping><BR><BR> =
<BR><BR> <listener><BR><BR>  =
; =
<listener-class>ClickstreamLogger</listener-class><BR><BR>&nb=
sp; </listener></PRE><BR><BR> &nb=
sp;=D5=E2=D7=A2=B2=E1=C1=CBClickstreamFilter=B2=A2=C9=E8=D6=C3=C6=E4=B4=A6=
=C0=ED*.jsp=BA=CD*.html=C0=B4=B5=C4=C7=EB=C7=F3=A1=A3=D5=E2=D2=B2=BD=ABCl=
ickstreamLogger=D7=A2=B2=E1=CE=AA=D2=BB=B8=F6=BC=E0=CC=FD=C6=F7=D2=D4=D4=DA=
=D3=A6=D3=C3=CA=C2=BC=FE=B7=A2=C9=FA=CA=B1=BD=D3=CA=DC=CB=FB=C3=C7=A1=A3<=
BR><BR><BR><BR> =20
=
=C1=BD=B8=F6JSP=D2=B3=C3=E6=B4=D3=BB=E1=BB=B0=D6=D0=C8=A1clickstream=CA=FD=
=BE=DD=BA=CDcontext=B6=D4=CF=F3=B2=A2=CA=B9=D3=C3HTML=BD=E7=C3=E6=C0=B4=CF=
=D4=CA=BE=B5=B1=C7=B0=D7=B4=CC=AC=A1=A3=CF=C2=C3=E6=B5=C4clickstream.jsp=CE=
=C4=BC=FE=CF=D4=CA=BE=C1=CB=B8=F6=B4=F3=B8=C5=A3=BA<BR><BR><PRE =
class=3Doverflow title=3D"pre code"><%@ page import=3D"java.util.*" =
%><BR><BR><%@ page import=3D"Clickstream" =
%><BR><BR><%<BR><BR>Map clickstreams =3D =
(Map)application.getAttribute("clickstreams");<BR><BR>String showbots =
=3D "false";<BR><BR> <BR><BR>if (request.getParameter("showbots") !=3D =
null) {<BR><BR> if =
(request.getParameter("showbots").equals("true"))<BR><BR> &nbs=
p; showbots =3D "true";<BR><BR> else if =
(request.getParameter("showbots").equals("both"))<BR><BR> &nbs=
p; showbots =3D "both";<BR><BR>}<BR><BR>%><BR><BR> =
<BR><BR><font face=3D"Verdana" size=3D"-1"><BR><BR><h1>All =
Clickstreams</h1><BR><BR> <BR><BR><a =
href=3D"clickstreams.jsp?showbots=3Dfalse">No Bots</a> =
|<BR><BR><a href=3D"clickstreams.jsp?showbots=3Dtrue">All =
Bots</a> |<BR><BR><a =
href=3D"clickstreams.jsp?showbots=3Dboth">Both</a> =
<p><BR><BR> <BR><BR><% if (clickstreams.keySet().size() =3D=3D =
0) { %><BR><BR> No =
clickstreams in progress<BR><BR><% } %><BR><BR> =
<BR><BR><%<BR><BR>Iterator it =3D =
clickstreams.keySet().iterator();<BR><BR>int count =3D 0;<BR><BR>while =
(it.hasNext()) {<BR><BR> String key =3D =
(String)it.next();<BR><BR> Clickstream stream =3D =
(Clickstream)clickstreams.get(key);<BR><BR> <BR><BR> if =
(showbots.equals("false") && stream.isBot()) =
{<BR><BR> continue;<BR><BR> }<BR><BR>&n=
bsp; else if (showbots.equals("true") && !stream.isBot()) =
{<BR><BR> continue;<BR><BR> }<BR><BR>&n=
bsp; count++;<BR><BR> try {<BR><BR>%><BR><BR> =
<BR><BR><%=3D count %>. <BR><BR><a =
href=3D"viewstream.jsp?sid=3D<%=3D key =
%>"><b><BR><BR><%=3D (stream.getHostname() !=3D null =
&& !stream.getHostname().equals("") =
?<BR><BR> stream.getHostname() : "Stream") =
%><BR><BR></b></a> <font size=3D"-1"><%=3D =
stream.getStream().size() %> reqs</font><br><BR><BR> =
<BR><BR><%<BR><BR> }<BR><BR> catch (Exception =
e) {<BR><BR>%><BR><BR> An error occurred - <%=3D e =
%><br><BR><BR><%<BR><BR> }<BR><BR>}<BR><BR>%></=
PRE><BR><BR>=D5=E2=B8=F6=B0=FC=BA=DC=C8=DD=D2=D7=B4=D3OpenSymphony=CF=C2=D4=
=D8=B2=A2=B0=B2=D7=B0=A1=A3=BD=ABJava=CE=C4=BC=FE=B1=E0=D2=EB=B2=A2=B7=C5=
=D4=DA<BR><BR>WEB-INF/classes=CF=C2=A3=AC=BD=ABJSP=CE=C4=BC=FE=B7=C5=B5=BD=
Web=D3=A6=D3=C3=C2=B7=BE=B6=CF=C2=A3=AC=B0=B4=B0=EF=D6=FA=D0=DE=B8=C4web.=
xml=CE=C4=BC=FE=A1=A3=CE=AA=B7=C0=D6=B9=D4=DA=D5=E2=D0=A9=B9=A4=D7=F7=C7=B0=
=B5=C4=D5=F9=C2=DB=A3=AC=C4=E3=BF=C9=D2=D4=B4=D3<BR><BR>http://www.javawo=
rld.com/jw-06-2001/Filters/clickstream.war=B4=A6=D5=D2=B5=BD=B4=F2=BA=C3=B0=
=FC=B5=C4WAR=CE=C4=BC=FE=A1=A3<BR><BR><BR><BR>=CE=AA=C4=DC=C8=C3=B4=CB=B9=
=FD=C2=CB=C6=F7=C4=DC=D4=DATomcat=20
4.0 beta=20
=
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=D2=BB=B8=F6=B6=EE=CD=E2=B5=C4=B5=BC=C8=EB=D3=EF=BE=E4=A3=BA<%@=20
page import=3D=A1=B1Clickstream=A1=B1=20
=
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=D6=D1=B9=CB=F5=A3=AC=C8=E7=B9=FB=D6=A7=B3=D6=A3=AC=D4=F2=BD=AB=CF=EC=D3=A6=
=B6=D4=CF=F3=D3=C3=D7=D4=B6=A8=D2=E5=B5=C4=CF=EC=D3=A6=C0=B4=B4=F2=B0=FC=A3=
=AC=CB=FC=B5=C4getOutputStream()=BA=CDgetWriter()=B7=BD=B7=A8=D2=D1=BE=AD=
=B1=BB=B6=A8=D2=E5=CE=AA=BF=C9=D2=D4=C0=FB=D3=C3=D1=B9=CB=F5=B9=FD=B5=C4=CA=
=E4=B3=F6=C1=F7=A1=A3=CA=B9=D3=C3=B9=FD=C2=CB=C6=F7=D4=CA=D0=ED=C8=E7=B4=CB=
=BC=F2=B5=A5=B6=F8=D3=D0=D0=A7=B5=C4=BD=E2=BE=F6=CE=CA=CC=E2=A1=A3<BR><BR=
><BR><BR>=CE=D2=C3=C7=BD=AB=B4=D3init()=BF=AA=CA=BC=BF=B4=B4=FA=C2=EB=A3=BA=
<BR><BR> <PRE class=3Doverflow title=3D"pre code">public void =
init(FilterConfig filterConfig) {<BR><BR> config =
=3D filterConfig;<BR><BR> compressionThreshold =
=3D 0;<BR><BR> if (filterConfig !=3D null) =
{<BR><BR> String str =3D =
filterConfig.getInitParameter("compressionThreshold");<BR><BR>  =
; if (str !=3D null) =
{<BR><BR> compressionThres=
hold =3D =
Integer.parseInt(str);<BR><BR> }<BR><B=
R> else =
{<BR><BR> compressionThres=
hold =3D =
0;<BR><BR> }<BR><BR> =
}<BR><BR> }</PRE><BR><BR>=D7=A2=D2=E2=D4=DA=BC=EC=CB=F7=C7=
=EB=C7=F3=CD=B7=C7=B0=B1=D8=D0=EB=B0=D1request=D7=AA=BB=AF=CE=AAHttpServl=
etRequest=A3=AC=BE=CD=CF=EB=D4=DA=B5=DA=D2=BB=B8=F6=C0=FD=D7=D3=C0=EF=C4=C7=
=D1=F9=A1=A3=B9=FD=C2=CB=C6=F7=CA=B9=D3=C3wrapper=C0=E0CompressResponseWr=
apper=A3=AC=D2=BB=B8=F6=B4=D3<BR><BR>HttpServletResponseWrapper=C0=E0=BC=CC=
=B3=D0=CF=C2=C0=B4=B5=C4=D7=D4=B6=A8=D2=E5=C0=E0=A1=A3=D5=E2=B8=F6wrapper=
=B5=C4=B4=FA=C2=EB=CF=E0=B6=D4=B1=C8=BD=CF=BC=F2=B5=A5=A3=BA<BR><BR><PRE =
class=3Doverflow title=3D"pre code">public class =
CompressionResponseWrapper extends HttpServletResponseWrapper {<BR><BR> =
<BR><BR> protected ServletOutputStream stream =3D =
null;<BR><BR> protected PrintWriter writer =3D =
null;<BR><BR> protected int threshold =3D =
0;<BR><BR> protected HttpServletResponse origResponse =3D =
null;<BR><BR> <BR><BR> public =
CompressionResponseWrapper(HttpServletResponse response) =
{<BR><BR> super(response);<BR><BR> &nbs=
p; origResponse =3D response;<BR><BR> }<BR><BR> =
<BR><BR> public void setCompressionThreshold(int threshold) =
{<BR><BR> this.threshold =3D =
threshold;<BR><BR> }<BR><BR> <BR><BR> public =
ServletOutputStream creat⌨️ 快捷键说明
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