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<%!
 public String codeToString(String str)
 {
  String s=str;
  try
  {
   byte temp[]=s.getBytes("ISO-8859-1");
   s=new String(temp);
   return s;
   }
   catch(Exception e)
   {
    return s;
   }
  }
%>
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 package filters;
import java.io.IOException;
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.HttpServletRequest;
import javax.servlet.http.HttpServletRequestWrapper;
public class TomcatFormFilter implements Filter {
/**
* Request.java
* ¶Ô HttpServletRequestWrapper ½øÐÐÀ©³ä, ²»Ó°ÏìÔ­À´µÄ¹¦Äܲ¢ÄÜÌṩËù
ÓÐµÄ HttpServletRequest
* ½Ó¿ÚÖеŦÄÜ. Ëü¿ÉÒÔͳһµÄ¶Ô Tomcat ĬÈÏÉèÖÃϵÄÖÐÎÄÎÊÌâ½øÐнâ¾ö¶øÖ»
ÐèÒªÓÃÐ嵀 Request ¶ÔÏóÌæ»»Ò³ÃæÖеÄ
* request ¶ÔÏó¼´¿É.
*/
class Request extends HttpServletRequestWrapper
{
public Request(HttpServletRequest request) {
super(request);
}
/**
* ת»»ÓÉ±íµ¥¶ÁÈ¡µÄÊý¾ÝµÄÄÚÂë.
* ´Ó ISO ×Ö·ûתµ½ GBK.
*/
public String toChi(String input) {
try {
byte[] bytes = input.getBytes("ISO8859-1");
return new String(bytes, "GBK");
}
catch (Exception ex) {
}
return null;
}
/**
* Return the HttpServletRequest holded by this object.
*/
private HttpServletRequest getHttpServletRequest()
{
return (HttpServletRequest)super.getRequest();
}
/**
* ¶ÁÈ¡²ÎÊý -- ÐÞÕýÁËÖÐÎÄÎÊÌâ.
*/
public String getParameter(String n


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