accesscontrolfilter.html

用jsp语言自己做的一个网站bookshot的全套程序以及一些样例。完全属于原创。

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<A NAME="config"><!-- --></A><H3>
config</H3>
<PRE>
private javax.servlet.FilterConfig <B>config</B></PRE>
<DL>
<DL>
</DL>
</DL>
<HR>

<A NAME="loginPage"><!-- --></A><H3>
loginPage</H3>
<PRE>
private java.lang.String <B>loginPage</B></PRE>
<DL>
<DL>
</DL>
</DL>

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<A NAME="AccessControlFilter()"><!-- --></A><H3>
AccessControlFilter</H3>
<PRE>
public <B>AccessControlFilter</B>()</PRE>
<DL>
</DL>

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<A NAME="init(javax.servlet.FilterConfig)"><!-- --></A><H3>
init</H3>
<PRE>
public void <B>init</B>(javax.servlet.FilterConfig&nbsp;config)
          throws javax.servlet.ServletException</PRE>
<DL>
<DD>Reads the "loginPage" filter init parameter and saves the
 value in an instance variable.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE>init</CODE> in interface <CODE>javax.servlet.Filter</CODE></DL>
</DD>
<DD><DL>

<DT><B>Throws:</B>
<DD><CODE>javax.servlet.ServletException</CODE> - if the "loginPage" parameter is
   not set.</DL>
</DD>
</DL>
<HR>

<A NAME="destroy()"><!-- --></A><H3>
destroy</H3>
<PRE>
public void <B>destroy</B>()</PRE>
<DL>
<DD>Resets the instance variable.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE>destroy</CODE> in interface <CODE>javax.servlet.Filter</CODE></DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="doFilter(javax.servlet.ServletRequest, javax.servlet.ServletResponse, javax.servlet.FilterChain)"><!-- --></A><H3>
doFilter</H3>
<PRE>
public void <B>doFilter</B>(javax.servlet.ServletRequest&nbsp;request,
                     javax.servlet.ServletResponse&nbsp;response,
                     javax.servlet.FilterChain&nbsp;chain)
              throws java.io.IOException,
                     javax.servlet.ServletException</PRE>
<DL>
<DD>Looks for the authentication token in the session and forwards
 to the login page if not found.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE>doFilter</CODE> in interface <CODE>javax.servlet.Filter</CODE></DL>
</DD>
<DD><DL>

<DD><CODE>java.io.IOException</CODE>
<DD><CODE>javax.servlet.ServletException</CODE></DL>
</DD>
</DL>
<HR>

<A NAME="isAuthenticated(javax.servlet.http.HttpServletRequest)"><!-- --></A><H3>
isAuthenticated</H3>
<PRE>
private boolean <B>isAuthenticated</B>(javax.servlet.http.HttpServletRequest&nbsp;request)</PRE>
<DL>
<DD>Returns true if the session contains the authentication token.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="getForwardURI(javax.servlet.http.HttpServletRequest)"><!-- --></A><H3>
getForwardURI</H3>
<PRE>
private java.lang.String <B>getForwardURI</B>(javax.servlet.http.HttpServletRequest&nbsp;request)</PRE>
<DL>
<DD>Returns the context-relative path to the login page, with the
 parameters used by the login page.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="getContextRelativeURI(javax.servlet.http.HttpServletRequest)"><!-- --></A><H3>
getContextRelativeURI</H3>
<PRE>
private java.lang.String <B>getContextRelativeURI</B>(javax.servlet.http.HttpServletRequest&nbsp;request)</PRE>
<DL>
<DD>Returns a context-relative path for the request, including
 the query string, if any.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
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