Question

我正在尝试应用以下示例。我在一本关于servlet的书中找到了它，但是IDE给了我错误信息“servlet tag is unknown”。

你能帮我找到错误吗？注意：HTML文件保存为.shtml。

<HTML>
<HEAD><TITLE>Times!</TITLE></HEAD>
<BODY>
The current time here is:
<SERVLET code="CurrentTime">
</SERVLET>
<P>
The current time in London is:
<SERVLET code="CurrentTime">
<PARAM name="zone" value="GMT">
</SERVLET>
<P>
And the current time in New York is:
<SERVLET code="CurrentTime">
<PARAM name="zone" value="EST">
</SERVLET>
<P>
</BODY>
</HTML>

这是servlet文件

import java.io.*;
import java.text.*;
import java.util.*;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * Servlet implementation class Hello
 */
@WebServlet("/CurrentTime")
public class CurrentTime extends HttpServlet {
    private static final long serialVersionUID = 1L;

    /**
     * @see HttpServlet#HttpServlet()
     */
    public CurrentTime() {
        super();
        // TODO Auto-generated constructor stub
    }

    /**
     * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
     */
    protected void doGet(HttpServletRequest req, HttpServletResponse res) throws ServletException, IOException {
        PrintWriter out = res.getWriter();
         Date date = new Date();
         DateFormat df = DateFormat.getInstance();
         String zone = req.getParameter("zone");
         if (zone != null) {
         TimeZone tz = TimeZone.getTimeZone(zone);
         df.setTimeZone(tz);
         }
         out.println(df.format(date));
     }


    /**
     * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
     */
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // TODO Auto-generated method stub


    }

}

结果是时间没有显示

Servlet标记未知

0 个答案: