📄 errorpageservlet.java
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/* * ErrorPageServlet.java * * */package com.dvd.view;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;// Support classesimport java.io.IOException;import java.io.PrintWriter;// Model classesimport java.util.List;import java.util.Iterator;/** * * @author * @version */public class ErrorPageServlet extends HttpServlet { public void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException { processRequest(request, response); } public void doPost(HttpServletRequest request, HttpServletResponse response) throws IOException { processRequest(request, response); } public void processRequest(HttpServletRequest request, HttpServletResponse response) throws IOException { // Retrieve the errorMsgs from the request-scope List errorMsgs = (List) request.getAttribute("errorMsgs"); // Specify the content type is HTML response.setContentType("text/html"); PrintWriter out = response.getWriter(); // Generate the HTML response out.println("<html>"); out.println("<head>"); out.println("<title>DVD Library Application: Error Page</title>"); out.println("</head>"); out.println("<body bgcolor='white'>"); out.println("<h2>Error Report</h2>"); out.println("<font color='red'>Please correct the following errors:"); out.println("<ul>"); Iterator items = errorMsgs.iterator(); while ( items.hasNext() ) { String message = (String) items.next(); out.println(" <li>" + message + "</li>"); } out.println("</ul>"); out.println("Back up and try again."); out.println("</font>"); out.println("</body>"); out.println("</html>"); out.close(); }}⌨️ 快捷键说明
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