httpfilter.java

来自「购物车系统」· Java 代码 · 共 52 行

package com.estore.web.filter;

import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;

public abstract class HttpFilter implements Filter
{
  private FilterConfig config;
  
  public void init(FilterConfig config) throws ServletException
  {
    this.config = config;
    init();
  }
  
  public void init() throws ServletException
  {
  }
  
  public FilterConfig getFilterConfig()
  {
    return config;
  }
  
  public String getInitParameter(String name)
  {
    return config.getInitParameter(name);
  }
  
  public ServletContext getServletContext()
  {
    return config.getServletContext();
  }
  
  public void doFilter(ServletRequest request, 
                        ServletResponse response, 
                          FilterChain chain)
                           throws ServletException, IOException
  {
    doFilter((HttpServletRequest)request, (HttpServletResponse)response, chain);
  }
  
  public abstract void doFilter(HttpServletRequest request, 
                        HttpServletResponse response, 
                          FilterChain chain)
                           throws ServletException, IOException;
  
  public void destroy()
  {
  }
}