| 发表于：2007-01-31 15:42:39 楼主 |
filter代码如下：
package util;
import java.io.ioexception;
import javax.servlet.http.*;
import javax.servlet.filter;
import javax.servlet.filterchain;
import javax.servlet.filterconfig;
import javax.servlet.servletexception;
import javax.servlet.servletrequest;
import javax.servlet.servletresponse;
import javax.servlet.http.httpservlet;
public class adminfilter extends httpservlet implements filter
{
/**
*
*/
private static final long serialversionuid = -5545950069282900798l;
protected filterconfig filterconfig;
string login_page= "login.jsp ";
public void dofilter（final servletrequest req, final servletresponse res,final filterchain chain)
throws ioexception, servletexception
{
// todo 自动生成方法存根
httpservletrequest hreq=（httpservletrequest)req;
httpservletresponse hres=（httpservletresponse)res;
httpsession session=hreq.getsession（);
string flag= " ";
try
{
flag=（string)session.getattribute（ "islogin ");
if（ "true ".equals（flag))
{
chain.dofilter（hreq, hres);
}
else
{
hres.sendredirect（login_page);
}
}
catch（exception e)
{
e.printstacktrace（);
}
}
public void init（filterconfig config) throws servletexception
{
// todo 自动生成方法存根
this.filterconfig=config;
}
public void setfilterconfig（filterconfig filterconfig)
{
this.filterconfig=filterconfig;
}
public void destroy（)
{
this.filterconfig=null;
}
}
xml中配置如下：
<servlet>
<description> adminfilter </description>
<display-name> adminfilter </display-name>
<servlet-name> adminfilter </servlet-name>
<servlet-class> util.adminfilter </servlet-class>
</servlet>
<servlet-mapping>
<servlet-name> adminfilter </servlet-name>
<url-pattern> /admin/* </url-pattern>
</servlet-mapping>
我现在通过http://localhost/infosite/login.jsp登入到http://localhost/infosite/admin/admin_.jsp，总是出现一下错误：
http status 405 - http method get is not supported by this url
我尝试了/admin/下的其他页面登入，都出现相同错误。于是我将配置改成如下：
<servlet-mapping>
<servlet-name> adminfilter </servlet-name>
<url-pattern> /admin/admin_.jsp </url-pattern>
</servlet-mapping>
这时访问/admin_.jsp出错，/admin/下的其他页面可以访问！
我现在要实现/admin/下的所有页面过滤，应该怎么做？
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