java 递归查询上级部门

public class Department {
    private String name;
    private Department parent;

    public Department(String name, Department parent) {
        this.name = name;
        this.parent = parent;
    }

    public String getName() {
        return name;
    }

    public Department getParent() {
        return parent;
    }

    public String findTopLevelDepartment() {
        if (parent == null) {
            return name;
        } else {
            return parent.findTopLevelDepartment();
        }
    }
}

// 示例
Department sales = new Department("Sales", null);
Department regionalSales = new Department("Regional Sales", sales);
Department localSales = new Department("Local Sales", regionalSales);

System.out.println(localSales.findTopLevelDepartment()); // 输出：Sales