用java写个部门的树结构

以下是使用Java编写的部门树结构示例代码：

import java.util.ArrayList;
import java.util.List;

public class Department {
    private String name;
    private List<Department> subDepartments;

    public Department(String name) {
        this.name = name;
        this.subDepartments = new ArrayList<>();
    }

    public String getName() {
        return name;
    }

    public void addSubDepartment(Department subDepartment) {
        subDepartments.add(subDepartment);
    }

    public List<Department> getSubDepartments() {
        return subDepartments;
    }

    public void printDepartmentTree(int level) {
        StringBuilder sb = new StringBuilder();
        for (int i = 0; i < level; i++) {
            sb.append("-");
        }
        System.out.println(sb.toString() + name);
        for (Department subDepartment : subDepartments) {
            subDepartment.printDepartmentTree(level + 1);
        }
    }

    public static void main(String[] args) {
        Department root = new Department("Company");
        Department department1 = new Department("Department 1");
        Department department2 = new Department("Department 2");
        Department department3 = new Department("Department 3");

        root.addSubDepartment(department1);
        root.addSubDepartment(department2);
        department1.addSubDepartment(department3);

        root.printDepartmentTree(0);
    }
}

在这个示例代码中，Department类表示一个部门，包含名称和子部门列表。printDepartmentTree()方法打印出整个部门树结构，使用递归实现。在main()方法中创建了一个根部门和三个子部门，并将它们添加到根部门和一个子部门中。最后调用printDepartmentTree()方法打印出部门树结构