gdexecutetimefilter.java

j2ee程序。 spring、xml、 实现增加内容选项。

package com.gd.web.filter;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;

import com.gd.mvc.util.GdDate;

public class GdExecuteTimeFilter implements Filter {
	protected FilterConfig config;
	//设定上下文路径
	private ServletContext context;
	private String filterName;
	/**
	 * 初始化Filter，取得上下文路径
	 */
	public void init(FilterConfig config) throws ServletException {
		this.config = config;
		context = config.getServletContext();
		filterName = config.getFilterName();
	}
	/**
	 * 进行过滤
	 */
	public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws ServletException, IOException {
		long startTime = System.currentTimeMillis();
		if (request instanceof HttpServletRequest) {
			HttpServletRequest req = (HttpServletRequest)request;
			context.log(req.getRemoteHost() + " 访问 " + req.getRequestURL() + " 的开始时间是：" + GdDate.getCurrentDateAndTime());
		}
		chain.doFilter(request,response);
		if (request instanceof HttpServletRequest) {
			HttpServletRequest req = (HttpServletRequest)request;
			context.log(req.getRemoteHost() + " 访问 " + req.getRequestURL() + " 的结束时间是：" + GdDate.getCurrentDateAndTime());
			context.log(req.getRemoteHost() + " 访问 " + req.getRequestURL() + " 共使用的时间：" + (System.currentTimeMillis() - startTime) + "ms" +
					"(该日志由 " + filterName + " 报出)");
		}
		
	}
	/**
	 * 销毁
	 */
	public void destroy() {

	}
}