【大学上机】请问我的servlet页面为什么依然是404，还是我的环境就没与配置好？

这个是servlet类：
package servlet;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;
import java.text.DateFormat;
import java.util.Date;
public class ServletDate extends HttpServlet {
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

}

protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    request.setCharacterEncoding("UTF-8");
    response.setCharacterEncoding("UTF-8");
    response.setContentType("text/html");
    PrintWriter out = response.getWriter();
    String dateString="null";
    Date date=new Date();
    DateFormat ddtf = DateFormat.getDateTimeInstance();
    System.out.println("日期时间：" + ddtf.format(date));
    out.flush();
    out.close();
}

}
web.xml:

控制台，下的中文版，使用还有乱码
Connected to server
[2020-06-19 10:56:17,422] Artifact ServletDemo:war exploded: Artifact is being deployed, please wait...
鍏湀 19, 2020 10:56:17 涓婂崍 org.apache.catalina.deploy.WebXml setVersion
璀﹀憡: Unknown version string [4.0]. Default version will be used.
[2020-06-19 10:56:17,914] Artifact ServletDemo:war exploded: Artifact is deployed successfully
[2020-06-19 10:56:17,915] Artifact ServletDemo:war exploded: Deploy took 492 milliseconds
鍏湀 19, 2020 10:56:27 涓婂崍 org.apache.catalina.startup.HostConfig deployDirectory
淇℃伅: 鎶妛eb 搴旂敤绋嬪簭閮ㄧ讲鍒扮洰褰� [F:\tomcat\apache-tomcat-7.0.104\webapps\manager]
鍏湀 19, 2020 10:56:27 涓婂崍 org.apache.catalina.startup.HostConfig deployDirectory
淇℃伅: Web搴旂敤绋嬪簭鐩綍[F:\tomcat\apache-tomcat-7.0.104\webapps\manager]鐨勯儴缃插凡鍦╗80]姣鍐呭畬鎴�

https://blog.csdn.net/qq_43298198/article/details/88430670

你好，这个看不出什么，请把控制台的报错日志贴出来一下