servlet filter

package filter;

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;

public class URLLogFilter implements Filter {

	@Override
	public void init(FilterConfig filterConfig) throws ServletException {
		// TODO Auto-generated method stub

	}

	@Override
	public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
			throws IOException, ServletException {
		// TODO Auto-generated method stub
		HttpServletRequest hrequest = (HttpServletRequest) request;
		String uri = hrequest.getRequestURI();
		System.out.println("請求" + uri + "開始");
		chain.doFilter(request, response);
		System.out.println("請求" + uri + "結束");
	}

	@Override
	public void destroy() {
		// TODO Auto-generated method stub

	}

}

web.xml

<filter>
		<filter-name>urllogFilter</filter-name>
		<filter-class>filter.URLLogFilter</filter-class>
	</filter>
	<filter-mapping>
		<filter-name>urllogFilter</filter-name>
		<url-pattern>/*</url-pattern>
	</filter-mapping>