testfilter.java

本书是一本为Java学习者在基础内容学习结束后进行课程设计时提供参考的指导书

package apibook.c7.s1;

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

//测试Filter接口
public class TestFilter implements Filter {
  FilterConfig config;

  public TestFilter() {
  }

  public void setFilterConfig(FilterConfig config) {
    this.config = config;
  }

  public FilterConfig getFilterConfig() {
    return config;
  }

  public static void main(String[] args) {
    TestFilter testFilter1 = new TestFilter();
  }
  public void init(FilterConfig parm1) throws javax.servlet.ServletException {
    /**@todo Implement this javax.servlet.Filter method*/
    throw new java.lang.UnsupportedOperationException("Method init() not yet implemented.");
  }
  public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) throws java.io.IOException, javax.servlet.ServletException {
    ServletContext context = getFilterConfig().getServletContext();
    long bef = System.currentTimeMillis();
    chain.doFilter(req, res); // no chain parameter needed here
    long aft = System.currentTimeMillis();
    context.log("Request to " + req.getServerName() + ": " + (aft-bef));//.getRequestURI()
  }
  public void destroy() {
    /**@todo Implement this javax.servlet.Filter method*/
    throw new java.lang.UnsupportedOperationException("Method destroy() not yet implemented.");
  }

}