Introduction to personnel management application development in Java language

The Java language is a programming language widely used in enterprise-level application development. In enterprises, personnel management is a very important aspect, which involves the management of organizational structure, employee information, and performance evaluation. This article will introduce how to use Java language to develop a simple personnel management application.

1. System Requirements Analysis

Before developing personnel management applications, we need to conduct system requirements analysis to determine the system’s functional requirements, operating procedures, data structures, and permission controls. requirements. In the personnel management application, it involves the following functions that need to be implemented:

a. Organization management: including departments, positions, and the departments and positions to which employees belong.

b. Employee information management: including basic employee information, work information, salary information, training information, etc.

c. Performance evaluation management: including assessment indicators, assessment results, assessment levels, etc.

d. Permission management: Users in different positions and departments need different system permissions.

2. Technology Selection

After determining the system requirements, we need to choose the appropriate technology to implement our personnel management system. In Java development, commonly used technologies include Spring, Struts, Hibernate, etc. In this article, we choose to use SpringBoot and MyBatis for development.

3. Database design

Before application development, we need to design the database structure first. In the personnel management system, we need to design tables for employees, departments, positions, assessment indicators, assessment results, etc. The following is the employee information form we designed:

CREATE TABLE `employee` (
  `id` bigint(20) NOT NULL COMMENT '员工ID',
  `name` varchar(255) NOT NULL COMMENT '员工姓名',
  `sex` tinyint(1) NOT NULL COMMENT '员工性别(1:男,0:女)',
  `age` tinyint(3) NOT NULL COMMENT '员工年龄',
  `phone` varchar(20) DEFAULT NULL COMMENT '员工电话号码',
  `address` varchar(255) DEFAULT NULL COMMENT '员工联系地址',
  `email` varchar(255) DEFAULT NULL COMMENT '员工电子邮箱',
  `status` tinyint(1) DEFAULT NULL COMMENT '员工状态(0:无效，1:有效)',
  `department_id` bigint(20) NOT NULL COMMENT '所属部门ID',
  `job_id` bigint(20) NOT NULL COMMENT '所属岗位ID',
  `entry_date` datetime DEFAULT NULL COMMENT '入职日期',
  `leave_date` datetime DEFAULT NULL COMMENT '离职日期',
  `create_time` datetime DEFAULT NULL COMMENT '创建时间',
  `update_time` datetime DEFAULT NULL COMMENT '更新时间',
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT='员工信息表';

4. Development and implementation

After system requirements analysis, technology selection and database design, we can start development and implementation . The following is part of the code implementation:

a. Department management

@Service
@Transactional(rollbackFor = Exception.class)
public class DepartmentServiceImpl implements DepartmentService {

    @Autowired
    private DepartmentMapper departmentMapper;

    @Override
    public List<Department> getAllDepartments() {
        return departmentMapper.getAllDepartments();
    }

    @Override
    public int addDepartment(Department department) {
        return departmentMapper.addDepartment(department);
    }

    @Override
    public int deleteDepartmentById(Long id) {
        return departmentMapper.deleteDepartmentById(id);
    }

    @Override
    public int updateDepartment(Department department) {
        return departmentMapper.updateDepartment(department);
    }
}

@Controller
@RequestMapping("/department")
public class DepartmentController {

    @Autowired
    private DepartmentService departmentService;

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

    @PostMapping("/add")
    @ResponseBody
    public String addDepartment(@RequestBody Department department) {
        int count = departmentService.addDepartment(department);
        if(count == 1) {
            return "success";
        }
        return "fail";
    }
}

b. Employee information management

@Service
@Transactional(rollbackFor = Exception.class)
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    @Override
    public List<Employee> getEmployeesByDepartmentId(Long departmentId) {
        return employeeMapper.getEmployeesByDepartmentId(departmentId);
    }

    @Override
    public int addEmployee(Employee employee) {
        return employeeMapper.addEmployee(employee);
    }

    @Override
    public int deleteEmployeeById(Long id) {
        return employeeMapper.deleteEmployeeById(id);
    }

    @Override
    public int updateEmployee(Employee employee) {
        return employeeMapper.updateEmployee(employee);
    }
}

@Controller
@RequestMapping("/employee")
public class EmployeeController {

    @Autowired
    private EmployeeService employeeService;

    @GetMapping("/{departmentId}")
    @ResponseBody
    public List<Employee> getEmployeesByDepartmentId(@PathVariable Long departmentId) {
        return employeeService.getEmployeesByDepartmentId(departmentId);
    }

    @PostMapping("/add")
    @ResponseBody
    public String addEmployee(@RequestBody Employee employee) {
        int count = employeeService.addEmployee(employee);
        if(count == 1) {
            return "success";
        }
        return "fail";
    }
}

c. Performance evaluation management

@Service
@Transactional(rollbackFor = Exception.class)
public class PerformanceEvaluationServiceImpl implements PerformanceEvaluationService {

    @Autowired
    private PerformanceEvaluationMapper performanceEvaluationMapper;

    @Override
    public List<PerformanceEvaluation> getPerformanceEvaluationsByEmployeeId(Long employeeId) {
        return performanceEvaluationMapper.getPerformanceEvaluationsByEmployeeId(employeeId);
    }

    @Override
    public int addPerformanceEvaluation(PerformanceEvaluation performanceEvaluation) {
        return performanceEvaluationMapper.addPerformanceEvaluation(performanceEvaluation);
    }

    @Override
    public int deletePerformanceEvaluationById(Long id) {
        return performanceEvaluationMapper.deletePerformanceEvaluationById(id);
    }

    @Override
    public int updatePerformanceEvaluation(PerformanceEvaluation performanceEvaluation) {
        return performanceEvaluationMapper.updatePerformanceEvaluation(performanceEvaluation);
    }
}

@Controller
@RequestMapping("/evaluation")
public class PerformanceEvaluationController {

    @Autowired
    private PerformanceEvaluationService performanceEvaluationService;

    @GetMapping("/{employeeId}")
    @ResponseBody
    public List<PerformanceEvaluation> getPerformanceEvaluationsByEmployeeId(@PathVariable Long employeeId) {
        return performanceEvaluationService.getPerformanceEvaluationsByEmployeeId(employeeId);
    }

    @PostMapping("/add")
    @ResponseBody
    public String addPerformanceEvaluation(@RequestBody PerformanceEvaluation performanceEvaluation) {
        int count = performanceEvaluationService.addPerformanceEvaluation(performanceEvaluation);
        if(count == 1) {
            return "success";
        }
        return "fail";
    }
}

5. Summary

In this article, we introduced the process of developing personnel management applications using Java language. We first conducted a system requirements analysis and determined the functional requirements, operating procedures, data structures, and permission control requirements in the system. Then we chose technologies such as SpringBoot and MyBatis to implement system development. At the same time, we also introduced the implementation of modules such as department management, employee information management, and performance evaluation management. I hope this article can help developers who need to develop personnel management applications.

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