?? logonfilter.java
字號:
package hospital.Filter;
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
public class LogonFilter 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 request, ServletResponse response, FilterChain filterChain) {
try {
HttpServletRequest httpRequest = (HttpServletRequest) request;
HttpServletResponse httpResponse = (HttpServletResponse) response;
HttpSession session = httpRequest.getSession();
String requestURI = httpRequest.getRequestURI();
//System.out.println("!!!!!!!!!!:" + requestURI);
RequestDispatcher rd = httpRequest.getRequestDispatcher("/pages/error.html");
//用戶訪問的路徑為“/”表示是登陸頁面,直接通過
if (requestURI.endsWith("/") ||
requestURI.endsWith("index.html") ||
requestURI.equals("/loginAction.do") ||
requestURI.equals("/pages/error.html")) {
filterChain.doFilter(request, response);
}
//否則如果用戶訪問的不是登陸頁面
else {
//判斷session是否為空,為空則跳轉到登陸頁面,不為空則通過
if (session.getAttribute("userID") == null) {
rd.forward(request, response);
} else {
filterChain.doFilter(request, response);
}
}
} catch (ServletException sx) {
filterConfig.getServletContext().log(sx.getMessage());
} catch (IOException iox) {
filterConfig.getServletContext().log(iox.getMessage());
}
}
//Clean up resources
public void destroy() {
}
}
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