goodsmanagerfilter.java

基于java的物资管理系统非常好用啊相当简单

package com.university.goodsmanager.web.filter;
import java.io.IOException;
import javax.servlet.*;
import javax.servlet.http.*;
/*
 * 过滤器(阻止没有session的用户直接进行访问,编码)
 */
public class GoodsManagerFilter implements Filter {
	private FilterConfig config;
	private ServletContext context;
	public void init(FilterConfig config) throws ServletException {
		this.config=config;
		this.context=config.getServletContext();
	}
	public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
		response.setContentType("utf-8");
		HttpSession s;
		s=((HttpServletRequest)request).getSession(false);
		String nexturl=((HttpServletRequest)request).getServletPath();
		if(s!=null){
			chain.doFilter(request,response);
		}else{
			if("/login.do".equals(nexturl)){
				chain.doFilter(request,response);
			}else if("/registe.do".equals(nexturl)){
				chain.doFilter(request,response);
			}else{
				request.getRequestDispatcher("first.jsp").forward(request,response);
			}
		}
	}

	public void destroy() {
		this.config=null;
		this.context=null;
	}

}