2-5编程练习报错，请老师指点一下

Question

HTTP Status 404 – Not FoundType Status ReportMessage /ServletProj/ShopServletDescription The origin server did not find a current representation for the target resource or is not willing to disclose that one exists.Apache Tomcat/8.5.35源代码package com.imooc.book;import java.io.IOException;import java.io.PrintWriter;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;public class ServletProj extends HttpServlet{    @Override    protected void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {        String name=request.getParameter("category");        String html="<h1 style='color:red'>hi,"+name+"!</h1><hr/>";        System.out.println("返回给浏览器的响应数据为："+html);        PrintWriter out=response.getWriter();        out.println(html);//将html发送回浏览器            }    }<?xml version="1.0" encoding="UTF-8"?><web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1">  <display-name>ServletProj</display-name>  <welcome-file-list>    <welcome-file>index.html</welcome-file>    <welcome-file>index.htm</welcome-file>    <welcome-file>index.jsp</welcome-file>    <welcome-file>default.html</welcome-file>    <welcome-file>default.htm</welcome-file>    <welcome-file>default.jsp</welcome-file>  </welcome-file-list>  <servlet>    <servlet-name>book</servlet-name>    <servlet-class>com.imooc.book.ServletProj</servlet-class>  </servlet>  <servlet-mapping>    <servlet-name>book</servlet-name>    <url-pattern>/ShopServlet</url-pattern>  </servlet-mapping></web-app>

Answer 1

找不到对应的url映射方法，能提供详细的报错堆栈信息吗