）根据员⼯类Employee的设计，在MySQL中⾃⾏设计相关的表，并插⼊相关数据（可参考⼀、 （3）中的数据） （2）编写数据库的连接类DBConnection （3）编写⽅法Employee F1() 返回⼯资最⾼的员⼯信息 （4）编写⽅法ArrayList<Employee> F2() 返回⼯资超过2000的所有员⼯信息 （5）编写⽅法Boolean F3(Employee e)，判断数据库中是否包含员⼯e的信息

首先，根据Employee类的设计，我们可以在MySQL中创建一个名为`employee`的表，并插入相关数据。表的结构如下：

CREATE TABLE employee (
  employeeID INT PRIMARY KEY,
  name VARCHAR(50),
  salary DECIMAL(10, 2)
);

可以使用以下SQL语句向表中插入数据：

INSERT INTO employee (employeeID, name, salary) VALUES
(1, 'John', 5000),
(2, 'Alice', 6000),
(3, 'Bob', 5500),
(4, 'Emily', 7000),
(5, 'David', 4500),
(6, 'Sarah', 8000),
(7, 'Michael', 6500),
(8, 'Jessica', 5500),
(9, 'Daniel', 7500),
(10, 'Olivia', 6000);

接下来，我们可以编写数据库连接类DBConnection，用于连接并操作数据库。以下是一个示例：

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;

public class DBConnection {
    private static final String URL = "jdbc:mysql://localhost:3306/database_name";
    private static final String USERNAME = "username";
    private static final String PASSWORD = "password";

    public static Connection getConnection() throws SQLException {
        return DriverManager.getConnection(URL, USERNAME, PASSWORD);
    }
}

请将`URL`、`USERNAME`和`PASSWORD`替换为你自己的数据库连接信息。

接下来，我们可以编写方法来实现你的要求：

1. 实现方法F1，返回工资最高的员工信息：

import java.sql.*;

public class EmployeeDAO {
    public static Employee F1() {
        Employee employee = null;

        try (Connection connection = DBConnection.getConnection()) {
            String sql = "SELECT * FROM employee ORDER BY salary DESC LIMIT 1";
            Statement statement = connection.createStatement();
            ResultSet resultSet = statement.executeQuery(sql);

            if (resultSet.next()) {
                int employeeID = resultSet.getInt("employeeID");
                String name = resultSet.getString("name");
                double salary = resultSet.getDouble("salary");
                employee = new Employee(employeeID, name, salary);
            }
        } catch (SQLException e) {
            e.printStackTrace();
        }

        return employee;
    }
}

2. 实现方法F2，返回工资超过2000的所有员工信息：

import java.sql.*;
import java.util.ArrayList;

public class EmployeeDAO {
    public static ArrayList<Employee> F2() {
        ArrayList<Employee> employees = new ArrayList<>();

        try (Connection connection = DBConnection.getConnection()) {
            String sql = "SELECT * FROM employee WHERE salary > 2000";
            Statement statement = connection.createStatement();
            ResultSet resultSet = statement.executeQuery(sql);

            while (resultSet.next()) {
                int employeeID = resultSet.getInt("employeeID");
                String name = resultSet.getString("name");
                double salary = resultSet.getDouble("salary");
                Employee employee = new Employee(employeeID, name, salary);
                employees.add(employee);
            }
        } catch (SQLException e) {
            e.printStackTrace();
        }

        return employees;
    }
}

3. 实现方法F3，判断数据库中是否包含指定员工的信息：

import java.sql.*;

public class EmployeeDAO {
    public static boolean F3(Employee e) {
        boolean exists = false;

        try (Connection connection = DBConnection.getConnection()) {
            String sql = "SELECT * FROM employee WHERE employeeID = ?";
            PreparedStatement statement = connection.prepareStatement(sql);
            statement.setInt(1, e.getEmployeeID());
            ResultSet resultSet = statement.executeQuery();

            exists = resultSet.next();
        } catch (SQLException ex) {
            ex.printStackTrace();
        }

        return exists;
    }
}

请注意，以上代码只是示例，你需要根据你的数据库连接信息进行相应的修改。另外，需要导入相应的JDBC驱动程序，以与MySQL进行连接和操作。