securityfilter.java

来自「webWork+Spring+Hibernate整合开发网络书城,通过这个项目」· Java 代码 · 共 42 行

package org.thj.bookstore.util;

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;
import javax.servlet.http.HttpServletResponse;

public class SecurityFilter implements Filter {

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

	}

	public void doFilter(ServletRequest req, ServletResponse res,
			FilterChain chain) throws IOException, ServletException {
		HttpServletRequest request = (HttpServletRequest)req;
		HttpServletResponse response = (HttpServletResponse)res;
		if(request.getSession().getAttribute("user")==null){
			
			String path = request.getContextPath();
			response.sendRedirect(path + "/index.jsp");
		}
		else{
			
			chain.doFilter(request,response);
		}
	}

	public void init(FilterConfig arg0) throws ServletException {
		// TODO Auto-generated method stub

	}

}