如何利用MySQL和Java來發展一個簡單的人事管理系統
人事管理系統是企業管理中不可或缺的一部分,它能夠幫助企業有效地管理員工資訊、職位管理、薪資發放等重要事項。在本文中,我們將介紹如何利用MySQL和Java來開發一個簡單的人事管理系統,並給出具體的程式碼範例。
一、專案準備
在開始開發之前,我們需要準備一些必要的工具和環境:
二、資料庫設計
在開始寫Java程式碼之前,我們需要設計資料庫表結構。以下是一個簡化的資料庫表設計範例:
三、Java程式碼範例
import java.sql.Connection; import java.sql.DriverManager; import java.sql.SQLException; public class DBUtil { private static final String URL = "jdbc:mysql://localhost:3306/hrms"; private static final String USER = "root"; private static final String PASSWORD = "password"; public static Connection getConnection() { Connection conn = null; try { Class.forName("com.mysql.jdbc.Driver"); conn = DriverManager.getConnection(URL, USER, PASSWORD); } catch (ClassNotFoundException | SQLException e) { e.printStackTrace(); } return conn; } }
import java.sql.Connection; import java.sql.PreparedStatement; import java.sql.ResultSet; import java.sql.SQLException; public class EmployeeDao { public static void addEmployee(Employee employee) { Connection conn = DBUtil.getConnection(); String sql = "INSERT INTO employee (id, name, gender, birthday, hire_date) VALUES (?,?,?,?,?)"; try (PreparedStatement pstmt = conn.prepareStatement(sql)) { pstmt.setInt(1, employee.getId()); pstmt.setString(2, employee.getName()); pstmt.setString(3, employee.getGender()); pstmt.setString(4, employee.getBirthday()); pstmt.setString(5, employee.getHireDate()); pstmt.executeUpdate(); } catch (SQLException e) { e.printStackTrace(); } } public static void updateEmployee(Employee employee) { Connection conn = DBUtil.getConnection(); String sql = "UPDATE employee SET name=?, gender=?, birthday=?, hire_date=? WHERE id=?"; try (PreparedStatement pstmt = conn.prepareStatement(sql)) { pstmt.setString(1, employee.getName()); pstmt.setString(2, employee.getGender()); pstmt.setString(3, employee.getBirthday()); pstmt.setString(4, employee.getHireDate()); pstmt.setInt(5, employee.getId()); pstmt.executeUpdate(); } catch (SQLException e) { e.printStackTrace(); } } public static void deleteEmployee(int id) { Connection conn = DBUtil.getConnection(); String sql = "DELETE FROM employee WHERE id=?"; try (PreparedStatement pstmt = conn.prepareStatement(sql)) { pstmt.setInt(1, id); pstmt.executeUpdate(); } catch (SQLException e) { e.printStackTrace(); } } public static Employee getEmployeeById(int id) { Connection conn = DBUtil.getConnection(); String sql = "SELECT * FROM employee WHERE id=?"; try (PreparedStatement pstmt = conn.prepareStatement(sql)) { pstmt.setInt(1, id); ResultSet rs = pstmt.executeQuery(); if (rs.next()) { Employee employee = new Employee(); employee.setId(rs.getInt("id")); employee.setName(rs.getString("name")); employee.setGender(rs.getString("gender")); employee.setBirthday(rs.getString("birthday")); employee.setHireDate(rs.getString("hire_date")); return employee; } } catch (SQLException e) { e.printStackTrace(); } return null; } }
public class Test { public static void main(String[] args) { Employee employee = new Employee(); employee.setId(1); employee.setName("张三"); employee.setGender("男"); employee.setBirthday("1990-01-01"); employee.setHireDate("2020-01-01"); EmployeeDao.addEmployee(employee); Employee updatedEmployee = new Employee(); updatedEmployee.setId(1); updatedEmployee.setName("李四"); updatedEmployee.setGender("女"); updatedEmployee.setBirthday("1990-02-02"); updatedEmployee.setHireDate("2020-02-02"); EmployeeDao.updateEmployee(updatedEmployee); Employee getEmployee = EmployeeDao.getEmployeeById(1); System.out.println(getEmployee.getName()); EmployeeDao.deleteEmployee(1); } }
四、總結
透過上述步驟,我們可以利用MySQL和Java來發展一個簡單的人事管理系統。當然,這只是一個簡化的範例,實際的人事管理系統還需要更多的功能和細節。希望這篇文章能夠幫助您,祝您開發成功!
以上是如何利用MySQL和Java開發一個簡單的人事管理系統的詳細內容。更多資訊請關注PHP中文網其他相關文章!