如何找到高质量的Java OA系统源码？

由于Java OA系统源码非常庞大，无法在这里提供完整的代码，但我可以给你一个简单的Java OA系统的基本结构和关键部分的示例代码，你可以根据这些示例代码来构建你的OA系统。

1、你需要创建一个Maven项目，并添加以下依赖项：

<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>springbootstarterweb</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>springbootstarterdatajpa</artifactId>
    </dependency>
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysqlconnectorjava</artifactId>
        <scope>runtime</scope>
    </dependency>
</dependencies>

2、创建一个application.properties文件，配置数据库连接信息：

spring.datasource.url=jdbc:mysql://localhost:3306/oa_system?useSSL=false&serverTimezone=UTC
spring.datasource.username=root
spring.datasource.password=your_password
spring.jpa.hibernate.ddlauto=update

3、创建一个实体类Employee.java：

import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
@Entity
public class Employee {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;
    private String name;
    private String email;
    private String department;
    // Getters and setters
}

4、创建一个EmployeeRepository.java接口，继承JpaRepository：

import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.stereotype.Repository;
@Repository
public interface EmployeeRepository extends JpaRepository<Employee, Long> {
}

5、创建一个EmployeeService.java类，用于处理业务逻辑：

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.List;
@Service
public class EmployeeService {
    @Autowired
    private EmployeeRepository employeeRepository;
    public List<Employee> getAllEmployees() {
        return employeeRepository.findAll();
    }
    public Employee saveEmployee(Employee employee) {
        return employeeRepository.save(employee);
    }
    public void deleteEmployee(Long id) {
        employeeRepository.deleteById(id);
    }
}

6、创建一个EmployeeController.java类，用于处理HTTP请求：

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;
import java.util.List;
@RestController
@RequestMapping("/api/employees")
public class EmployeeController {
    @Autowired
    private EmployeeService employeeService;
    @GetMapping
    public List<Employee> getAllEmployees() {
        return employeeService.getAllEmployees();
    }
    @PostMapping
    public Employee createEmployee(@RequestBody Employee employee) {
        return employeeService.saveEmployee(employee);
    }
    @DeleteMapping("/{id}")
    public void deleteEmployee(@PathVariable Long id) {
        employeeService.deleteEmployee(id);
    }
}

7、创建一个Application.java类，启动Spring Boot应用：

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class Application {
    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }
}

这只是一个简单的Java OA系统的基本结构，你还需要根据实际需求添加更多的功能和模块，例如用户管理、权限控制、工作流引擎等，希望这个示例能帮助你入门。