jakarta.servlet.servletexception：错误实例化servlet类[task_8newstart.employeeservlet]

Question

employeeservlet.java

package task_8newStart;

import jakarta.servlet.ServletConfig;
import jakarta.servlet.http.HttpServlet;

import java.io.IOException;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.SQLException;

import jakarta.servlet.ServletException;
import jakarta.servlet.annotation.WebServlet;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;

public class EmployeeServlet extends HttpServlet {
    private static final long serialVersionUID = 1L;

...}

tirectory结构：

** web.xml **

`<?xml version="1.0" encoding="UTF-8"?>

<web-app 
     xmlns="http://xmlns.jcp.org/xml/ns/javaee"
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
     version="5.0">
    
    <servlet>
        <servlet-name>EmployeeServlet</servlet-name>
        <servlet-class>task_8newStart.EmployeeServlet</servlet-class>
    </servlet>
    
    <servlet-mapping>
        <servlet-name>EmployeeServlet</servlet-name>
        <url-pattern>/EmployeeServlet</url-pattern>
    </servlet-mapping>
    
    <session-config>
        <session-timeout>
            30
        </session-timeout>
    </session-config>
</web-app>`

我尝试了一切，我在互联网上的每个人都提供了不同的解决方案，没有任何作用。

i必须从Web-Inf目录中删除COM目录，并且有效。