rightfilter.java

来自「本系统基本完善了CRM管理系统的各个模块」· Java 代码 · 共 60 行

package com.accp.filter;

import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;

public class RightFilter extends HttpServlet implements Filter {
	private FilterConfig filterConfig;

	// Handle the passed-in FilterConfig
	public void init(FilterConfig filterConfig) throws ServletException {
		this.filterConfig = filterConfig;
	}

	// Process the request/response pair
	public void doFilter(ServletRequest req, ServletResponse resp,
			FilterChain filterChain) {
		try {
			HttpServletRequest request = (HttpServletRequest) req;
			HttpServletResponse response = (HttpServletResponse) resp;
			PrintWriter out = response.getWriter();
			HttpSession sess = request.getSession();
			// 从Session取出用户可以访问的地址
			String[] rightUrl = (String[]) sess.getAttribute("rightUrl");
			System.out.println("执行用户权限过滤");
			String page = request.getServletPath();
			System.out.println("你当前访问的路径为:" + page);
			if ("/login.do".equals(page) || ("/myRight.do").equals(page)) {
				filterChain.doFilter(request, response);
				return;
			}
			boolean isCall = false;
			for (int i = 0; i < rightUrl.length; i++) {
				if (page.equals(rightUrl[i])) {
					isCall = true;
					break;
				} else {
					isCall = false;
				}
			}
			if (isCall == true) {
				System.out.println("允许访问");
				filterChain.doFilter(request, response);
			} else {
				System.out.println("无权访问");
				out.print("对不起,您无权访问");
			}

		} catch (ServletException sx) {
			filterConfig.getServletContext().log(sx.getMessage());
		} catch (IOException iox) {
			filterConfig.getServletContext().log(iox.getMessage());
		}
	}

	// Clean up resources
	public void destroy() {
	}
}