<filter> 
<filter-name>filecapturefilter</filter-name> 
<filter-class>com.junjing.filter.filecapturefilter</filter-class> 
</filter> 
<filter-mapping> 
<filter-name>filecapturefilter</filter-name> 
<url-pattern>/latest.jsp</url-pattern> 
</filter-mapping> 

/** * start file filecapturefilter.java */ 
package com.junjing.filter; 
import javax.servlet.*; 
import javax.servlet.http.*; 
import java.io.*; 
public class filecapturefilter implements filter 
{ 
private string protdirpath; 
public void init(filterconfig filterconfig) 
throws servletexception 
{ 
protdirpath = filterconfig.getservletcontext().getrealpath("/"); 
} 
public void dofilter(servletrequest request,servletresponse response,filterchain 
chain) 
throws ioexception, servletexception 
{ 
string filename = protdirpath + "forum/lastest.html"; 
printwriter out = response.getwriter(); 
filecaptureresponsewrapper responsewrapper = new 
filecaptureresponsewrapper((httpservletresponse)response); 
chain.dofilter(request, responsewrapper); 
// fill responsewrapper up 
string html = responsewrapper.tostring(); 
//得到的html 页面结果字符串 
// responsewrapper.writefile(filename); 
// dump the contents 写成html 文件，也可以保存在内存 
//responsewrapper.writeresponse( out ); 
// back to browser 
//responsewrapper.sendredirect("lastestthread.jsp"); 
} 
public void destroy() {} 
} 
/** * end file filecapturefilter.java */ 

/** * start file filecaptureresponsewrapper.java */ 
package com.junjing.filter; 
import javax.servlet.*; 
import javax.servlet.http.*; 
import java.io.*; 
public class filecaptureresponsewrapper 
extends httpservletresponsewrapper 
{ 
private chararraywriter output; 
public string tostring() 
{ 
return output.tostring(); 
} 
public filecaptureresponsewrapper(httpservletresponse response) 
{ 
super(response); 
output = new chararraywriter(); 
} 
public printwriter getwriter() 
{ 
return new printwriter(output); 
} 
public void writefile(string filename) 
throws ioexception 
{ 
filewriter fw = new filewriter(filename); 
fw.write( output.tochararray() ); 
fw.close(); 
} 
public void writeresponse(printwriter out) 
{ 
out.print( output.tochararray() ); 
} 
} 
/** * end file filecaptureresponsewrapper.java */ 

/** * start file filecaptureresponsewrapper.java */ 
package com.junjing.filter; 
import javax.servlet.*; 
import javax.servlet.http.*; 
import java.io.*; 
public class filecaptureresponsewrapper 
extends httpservletresponsewrapper 
{ 
private chararraywriter output; 
public string tostring() 
{ 
return output.tostring(); 
} 
public filecaptureresponsewrapper(httpservletresponse response) 
{ 
super(response); 
output = new chararraywriter(); 
} 
public printwriter getwriter() 
{ 
return new printwriter(output); 
} 
public void writefile(string filename) 
throws ioexception 
{ 
filewriter fw = new filewriter(filename); 
fw.write( output.tostring()); 
fw.close(); 
} 
public servletoutputstream getoutputstream() 
throws java.io.ioexception 
{ 
return new servletoutputstream(); 
} 
public void write(int b) 
throws ioexception 
{ 
output.write(b); 
} 
public void write(byte b[]) 
throws ioexception 
{ 
output.write(new string(b,"gbk")); 
} 
public void write(byte b[], int off, int len) 
throws ioexception 
{ 
output.write(new string(b, off, len)); 
} 
}; 
} 
public void writeresponse(printwriter out) 
{ 
out.print(output.tochararray()); 
} 
} 
/** * end file filecaptureresponsewrapper.java */