【设计模式】几需体验三欢钟，里造会干我一样理解Facade和Mediator模式

/**
 * 材料部门，给办证者提供必要的材料
 * @author 行百里者
 */
public class StuffDept {
    public void makeStuff() {
        //处理业务逻辑
        System.out.println("制作相关材料，并发给Client填写");
    }
}

/**
 * 检查核验部门，核验通过才给盖章
 * @author 行百里者
 */
public class CheckDept {
    public void checkStuff() {
        //处理业务逻辑
        System.out.println("核查材料的准确性，核查通过才给盖章");
    }
}

/**
 * 发证部门
 * @author 行百里者
 */
public class IssueDept {
    public void issueCert() {
        //处理业务逻辑
        System.out.println("发证部门检验材料是否盖章，然后制证发证");
    }
}

public class Client {
    public static void main(String[] args) {
        //一定要按照这个顺序去办证，否则拿不到证
        StuffDept sd = new StuffDept();
        sd.makeStuff();
        CheckDept cd = new CheckDept();
        cd.checkStuff();
        IssueDept id = new IssueDept();
        id.issueCert();
    }
}

/**
 * “中国式办证”所需的“门面”部门，负责统一处理各部门的事情，
 * Client只需要调“门面”的doItJustOnce方法即可
 * @author 行百里者
 */
public class NetApp {
    private StuffDept stuffDept = new StuffDept();
    private CheckDept checkDept = new CheckDept();
    private IssueDept issueDept = new IssueDept();
    
    public void doItJustOnce() {
        stuffDept.makeStuff();
        checkDept.checkStuff();
        issueDept.issueCert();
    }
}

public class Client {
    public static void main(String[] args) {
        NetApp facade = new NetApp();
        facade.doItJustOnce();
    }
}