Java web自定义filter代码实例

<filter>
    <filter-name>myfilter</filter-name>
    <filter-class>sun.fifter.MyFifter</filter-class>
  </filter>

  <filter-mapping>
    <filter-name>myfilter</filter-name>
    <url-pattern>*</url-pattern>
  </filter-mapping>

package sun.fifter;

import java.io.IOException;

import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.tools.JavaCompiler;

public class MyFifter implements javax.servlet.Filter
{

  public MyFifter()
  {
    // TODO Auto-generated constructor stub
   
  }

  @Override
  public void destroy()
  {
    // TODO Auto-generated method stub
    System.out.println("destroy");
  }

  @Override
  public void doFilter(ServletRequest arg0, ServletResponse arg1,
      FilterChain arg2) throws IOException, ServletException
  {
    // TODO Auto-generated method stub
    System.out.println("doFilter");

  }

  @Override
  public void init(FilterConfig arg0) throws ServletException
  {
    // TODO Auto-generated method stub
    System.out.println("init");
  }

}