怎么用Java实现简单员工管理系统

发布时间：2022-02-25 11:33:55 作者：iii
来源：亿速云阅读：190

怎么用Java实现简单员工管理系统

引言

在现代企业中，员工管理系统是一个非常重要的工具，它可以帮助企业高效地管理员工信息、考勤记录、薪资发放等。本文将详细介绍如何使用Java语言实现一个简单的员工管理系统。通过本文的学习，读者将掌握Java编程的基本技能，并能够独立开发一个小型的管理系统。

需求分析

在开始开发之前，我们需要明确系统的功能需求。一个简单的员工管理系统通常包括以下功能：

员工信息管理：包括添加、删除、修改和查询员工信息。
部门管理：包括添加、删除、修改和查询部门信息。
考勤管理：记录员工的考勤信息。
薪资管理：计算和发放员工的薪资。
用户权限管理：不同角色的用户拥有不同的操作权限。

系统设计

3.1 系统架构

本系统采用MVC（Model-View-Controller）架构，将系统分为模型层、视图层和控制层。模型层负责数据的存储和业务逻辑处理，视图层负责用户界面的展示，控制层负责处理用户请求并调用相应的业务逻辑。

3.2 数据库设计

系统使用MySQL数据库存储数据，主要包含以下表：

员工表（Employee）：存储员工的基本信息。
部门表（Department）：存储部门信息。
考勤表（Attendance）：存储员工的考勤记录。
薪资表（Salary）：存储员工的薪资信息。
用户表（User）：存储系统用户信息。

3.3 类设计

根据系统需求，我们设计以下类：

Employee：员工实体类。
Department：部门实体类。
Attendance：考勤实体类。
Salary：薪资实体类。
User：用户实体类。
EmployeeDAO：员工数据访问类。
DepartmentDAO：部门数据访问类。
AttendanceDAO：考勤数据访问类。
SalaryDAO：薪资数据访问类。
UserDAO：用户数据访问类。
EmployeeService：员工业务逻辑类。
DepartmentService：部门业务逻辑类。
AttendanceService：考勤业务逻辑类。
SalaryService：薪资业务逻辑类。
UserService：用户业务逻辑类。
EmployeeController：员工控制类。
DepartmentController：部门控制类。
AttendanceController：考勤控制类。
SalaryController：薪资控制类。
UserController：用户控制类。

环境搭建

4.1 开发工具

IDE：IntelliJ IDEA 或 Eclipse
JDK：Java Development Kit 8 或以上
数据库：MySQL 5.7 或以上
构建工具：Maven 或 Gradle

4.2 依赖管理

在pom.xml中添加以下依赖：

<dependencies>
    <!-- MySQL驱动 -->
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>8.0.26</version>
    </dependency>
    <!-- Spring Boot Web -->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    <!-- Spring Boot Data JPA -->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-jpa</artifactId>
    </dependency>
    <!-- Thymeleaf模板引擎 -->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-thymeleaf</artifactId>
    </dependency>
    <!-- Lombok -->
    <dependency>
        <groupId>org.projectlombok</groupId>
        <artifactId>lombok</artifactId>
        <version>1.18.20</version>
        <scope>provided</scope>
    </dependency>
</dependencies>

代码实现

5.1 实体类

Employee.java

package com.example.employeemanagement.entity;

import lombok.Data;

import javax.persistence.*;
import java.util.Date;

@Data
@Entity
@Table(name = "employee")
public class Employee {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;

    @Column(name = "name")
    private String name;

    @Column(name = "gender")
    private String gender;

    @Column(name = "birth_date")
    private Date birthDate;

    @Column(name = "department_id")
    private Long departmentId;

    @Column(name = "position")
    private String position;

    @Column(name = "salary")
    private Double salary;
}

Department.java

package com.example.employeemanagement.entity;

import lombok.Data;

import javax.persistence.*;

@Data
@Entity
@Table(name = "department")
public class Department {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;

    @Column(name = "name")
    private String name;

    @Column(name = "description")
    private String description;
}

Attendance.java

package com.example.employeemanagement.entity;

import lombok.Data;

import javax.persistence.*;
import java.util.Date;

@Data
@Entity
@Table(name = "attendance")
public class Attendance {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;

    @Column(name = "employee_id")
    private Long employeeId;

    @Column(name = "date")
    private Date date;

    @Column(name = "status")
    private String status;
}

Salary.java

package com.example.employeemanagement.entity;

import lombok.Data;

import javax.persistence.*;
import java.util.Date;

@Data
@Entity
@Table(name = "salary")
public class Salary {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;

    @Column(name = "employee_id")
    private Long employeeId;

    @Column(name = "amount")
    private Double amount;

    @Column(name = "date")
    private Date date;
}

User.java

package com.example.employeemanagement.entity;

import lombok.Data;

import javax.persistence.*;

@Data
@Entity
@Table(name = "user")
public class User {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;

    @Column(name = "username")
    private String username;

    @Column(name = "password")
    private String password;

    @Column(name = "role")
    private String role;
}

5.2 数据访问层

EmployeeDAO.java

package com.example.employeemanagement.dao;

import com.example.employeemanagement.entity.Employee;
import org.springframework.data.jpa.repository.JpaRepository;

public interface EmployeeDAO extends JpaRepository<Employee, Long> {
}

DepartmentDAO.java

package com.example.employeemanagement.dao;

import com.example.employeemanagement.entity.Department;
import org.springframework.data.jpa.repository.JpaRepository;

public interface DepartmentDAO extends JpaRepository<Department, Long> {
}

AttendanceDAO.java

package com.example.employeemanagement.dao;

import com.example.employeemanagement.entity.Attendance;
import org.springframework.data.jpa.repository.JpaRepository;

public interface AttendanceDAO extends JpaRepository<Attendance, Long> {
}

SalaryDAO.java

package com.example.employeemanagement.dao;

import com.example.employeemanagement.entity.Salary;
import org.springframework.data.jpa.repository.JpaRepository;

public interface SalaryDAO extends JpaRepository<Salary, Long> {
}

UserDAO.java

package com.example.employeemanagement.dao;

import com.example.employeemanagement.entity.User;
import org.springframework.data.jpa.repository.JpaRepository;

public interface UserDAO extends JpaRepository<User, Long> {
    User findByUsername(String username);
}

5.3 业务逻辑层

EmployeeService.java

package com.example.employeemanagement.service;

import com.example.employeemanagement.entity.Employee;
import com.example.employeemanagement.dao.EmployeeDAO;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;

@Service
public class EmployeeService {
    @Autowired
    private EmployeeDAO employeeDAO;

    public List<Employee> getAllEmployees() {
        return employeeDAO.findAll();
    }

    public Employee getEmployeeById(Long id) {
        return employeeDAO.findById(id).orElse(null);
    }

    public Employee addEmployee(Employee employee) {
        return employeeDAO.save(employee);
    }

    public Employee updateEmployee(Employee employee) {
        return employeeDAO.save(employee);
    }

    public void deleteEmployee(Long id) {
        employeeDAO.deleteById(id);
    }
}

DepartmentService.java

package com.example.employeemanagement.service;

import com.example.employeemanagement.entity.Department;
import com.example.employeemanagement.dao.DepartmentDAO;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;

@Service
public class DepartmentService {
    @Autowired
    private DepartmentDAO departmentDAO;

    public List<Department> getAllDepartments() {
        return departmentDAO.findAll();
    }

    public Department getDepartmentById(Long id) {
        return departmentDAO.findById(id).orElse(null);
    }

    public Department addDepartment(Department department) {
        return departmentDAO.save(department);
    }

    public Department updateDepartment(Department department) {
        return departmentDAO.save(department);
    }

    public void deleteDepartment(Long id) {
        departmentDAO.deleteById(id);
    }
}

AttendanceService.java

package com.example.employeemanagement.service;

import com.example.employeemanagement.entity.Attendance;
import com.example.employeemanagement.dao.AttendanceDAO;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;

@Service
public class AttendanceService {
    @Autowired
    private AttendanceDAO attendanceDAO;

    public List<Attendance> getAllAttendances() {
        return attendanceDAO.findAll();
    }

    public Attendance getAttendanceById(Long id) {
        return attendanceDAO.findById(id).orElse(null);
    }

    public Attendance addAttendance(Attendance attendance) {
        return attendanceDAO.save(attendance);
    }

    public Attendance updateAttendance(Attendance attendance) {
        return attendanceDAO.save(attendance);
    }

    public void deleteAttendance(Long id) {
        attendanceDAO.deleteById(id);
    }
}

SalaryService.java

package com.example.employeemanagement.service;

import com.example.employeemanagement.entity.Salary;
import com.example.employeemanagement.dao.SalaryDAO;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;

@Service
public class SalaryService {
    @Autowired
    private SalaryDAO salaryDAO;

    public List<Salary> getAllSalaries() {
        return salaryDAO.findAll();
    }

    public Salary getSalaryById(Long id) {
        return salaryDAO.findById(id).orElse(null);
    }

    public Salary addSalary(Salary salary) {
        return salaryDAO.save(salary);
    }

    public Salary updateSalary(Salary salary) {
        return salaryDAO.save(salary);
    }

    public void deleteSalary(Long id) {
        salaryDAO.deleteById(id);
    }
}

UserService.java

package com.example.employeemanagement.service;

import com.example.employeemanagement.entity.User;
import com.example.employeemanagement.dao.UserDAO;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class UserService {
    @Autowired
    private UserDAO userDAO;

    public User findByUsername(String username) {
        return userDAO.findByUsername(username);
    }

    public User addUser(User user) {
        return userDAO.save(user);
    }
}

5.4 控制层

EmployeeController.java

package com.example.employeemanagement.controller;

import com.example.employeemanagement.entity.Employee;
import com.example.employeemanagement.service.EmployeeService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

import java.util.List;

@RestController
@RequestMapping("/employees")
public class EmployeeController {
    @Autowired
    private EmployeeService employeeService;

    @GetMapping
    public List<Employee> getAllEmployees() {
        return employeeService.getAllEmployees();
    }

    @GetMapping("/{id}")
    public Employee getEmployeeById(@PathVariable Long id) {
        return employeeService.getEmployeeById(id);
    }

    @PostMapping
    public Employee addEmployee(@RequestBody Employee employee) {
        return employeeService.addEmployee(employee);
    }

    @PutMapping
    public Employee updateEmployee(@RequestBody Employee employee) {
        return employeeService.updateEmployee(employee);
    }

    @DeleteMapping("/{id}")
    public void deleteEmployee(@PathVariable Long id) {
        employeeService.deleteEmployee(id);
    }
}

DepartmentController.java

package com.example.employeemanagement.controller;

import com.example.employeemanagement.entity.Department;
import com.example.employeemanagement.service.DepartmentService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

import java.util.List;

@RestController
@RequestMapping("/departments")
public class DepartmentController {
    @Autowired
    private DepartmentService departmentService;

    @GetMapping
    public List<Department> getAllDepartments() {
        return departmentService.getAllDepartments();
    }

    @GetMapping("/{id}")
    public Department getDepartmentById(@PathVariable Long id) {
        return departmentService.getDepartmentById(id);
    }

    @PostMapping
    public Department addDepartment(@RequestBody Department department) {
        return departmentService.addDepartment(department);
    }

    @PutMapping
    public Department updateDepartment(@RequestBody Department department) {
        return departmentService.updateDepartment(department);
    }

    @DeleteMapping("/{id}")
    public void deleteDepartment(@PathVariable Long id) {
        departmentService.deleteDepartment(id);
    }
}

AttendanceController.java

package com.example.employeemanagement.controller;

import com.example.employeemanagement.entity.Attendance;
import com.example.employeemanagement.service.AttendanceService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

import java.util.List;

@RestController
@RequestMapping("/attendances")
public class AttendanceController {
    @Autowired
    private AttendanceService attendanceService;

    @GetMapping
    public List<Attendance> getAllAttendances() {
        return attendanceService.getAllAttendances();
    }

    @GetMapping("/{id}")
    public Attendance getAttendanceById(@PathVariable Long id) {
        return attendanceService.getAttendanceById(id);
    }

    @PostMapping
    public Attendance addAttendance(@RequestBody Attendance attendance) {
        return attendanceService.addAttendance(attendance);
    }

    @PutMapping
    public Attendance updateAttendance(@RequestBody Attendance attendance) {
        return attendanceService.updateAttendance(attendance);
    }

    @DeleteMapping("/{id}")
    public void deleteAttendance(@PathVariable Long id) {
        attendanceService.deleteAttendance(id);
    }
}

SalaryController.java

package com.example.employeemanagement.controller;

import com.example.employeemanagement.entity.Salary;
import com.example.employeemanagement.service.SalaryService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

import java.util.List;

@RestController
@RequestMapping("/salaries")
public class SalaryController {
    @Autowired
    private SalaryService salaryService;

    @GetMapping
    public List<Salary> getAllSalaries() {
        return salaryService.getAllSalaries();
    }

    @GetMapping("/{id}")
    public Salary getSalaryById(@PathVariable Long id) {
        return salaryService.getSalaryById(id);
    }

    @PostMapping
    public Salary addSalary(@RequestBody Salary salary) {
        return salaryService.addSalary(salary);
    }

    @PutMapping
    public Salary updateSalary(@RequestBody Salary salary) {
        return salaryService.updateSalary(salary);
    }

    @DeleteMapping("/{id}")
    public void deleteSalary(@PathVariable Long id) {
        salaryService.deleteSalary(id);
    }
}

UserController.java

package com.example.employeemanagement.controller;

import com.example.employeemanagement.entity.User;
import com.example.employeemanagement.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

@RestController
@RequestMapping("/users")
public class UserController {
    @Autowired
    private UserService userService;

    @PostMapping("/register")
    public User registerUser(@RequestBody User user) {
        return userService.addUser(user);
    }

    @PostMapping("/login")
    public User loginUser(@RequestBody User user) {
        return userService.findByUsername(user.getUsername());
    }
}

5.5 视图层

index.html

<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>Employee Management System</title>
</head>
<body>
    <h1>Employee Management System</h1>
    <ul>
        <li><a href="/employees">Employee List</a></li>
        <li><a href="/departments">Department List</a></li>
        <li><a href="/attendances">Attendance List</a></li>
        <li><a href="/salaries">Salary List</a></li>
    </ul>
</body>
</html>

employeeList.html

”`html <!DOCTYPE html> Employee List

怎么用Java实现简单员工管理系统

怎么用Java实现简单员工管理系统

目录

引言

需求分析

系统设计

3.1 系统架构

3.2 数据库设计

3.3 类设计

环境搭建

4.1 开发工具

4.2 依赖管理

代码实现

5.1 实体类

Employee.java

Department.java

Attendance.java

Salary.java

User.java

5.2 数据访问层

EmployeeDAO.java

DepartmentDAO.java

AttendanceDAO.java

SalaryDAO.java

UserDAO.java

5.3 业务逻辑层

EmployeeService.java

DepartmentService.java

AttendanceService.java

SalaryService.java

UserService.java

5.4 控制层

EmployeeController.java

DepartmentController.java

AttendanceController.java

SalaryController.java

UserController.java

5.5 视图层

index.html

employeeList.html

Employee List

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