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package com.sky.responsebility;
// 处理者
public abstract class Approver {
Approver approver; //下一个处理者
String name; //名字（具体是 校长，系主任，还是。。。）
// 构造方法
public Approver(String name){
this.name = name;
}
//下一个处理者
public void setApprover(Approver approver) {
this.approver = approver;
}
//处理审批请求的方法，得到一个请求，处理是子类完成，因此该方法做成抽象（因为是要具体的子类去完成请求的处理）
public abstract void processRequest(PurchaseRequest request);
}
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package com.sky.responsebility;
public class DepartmentApprover extends Approver{
//构造器
public DepartmentApprover(String name) {
super(name);
}
@Override
public void processRequest(PurchaseRequest request) {
if (request.getPrice() <= 5000){
System.out.println(" 请求编号 id = " + request.getId() + " 被 " + this.name + " 处理");
}else { // 如果他处理不了，就让他的后继者进行处理
approver.processRequest(request);
}
}
}
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package com.sky.responsebility;
public class CollageApprover extends Approver {
//构造器
public CollageApprover(String name) {
super(name);
}
@Override
public void processRequest(PurchaseRequest request) {
if (request.getPrice() > 5000 && request.getPrice() <= 10000) {
System.out.println(" 请求编号 id = " + request.getId() + " 被 " + this.name + " 处理");
}else { // 如果他处理不了，就让他的后继者进行处理
approver.processRequest(request);
}
}
}
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package com.sky.responsebility;
/**
* 副校长
*/
public class ViceSchoolMasterApprover extends Approver {
//构造器
public ViceSchoolMasterApprover(String name) {
super(name);
}
@Override
public void processRequest(PurchaseRequest request) {
if (request.getPrice() > 10000 && request.getPrice() <= 30000) {
System.out.println(" 请求编号 id = " + request.getId() + " 被 " + this.name + " 处理");
}else { // 如果他处理不了，就让他的后继者进行处理
approver.processRequest(request);
}
}
}
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package com.sky.responsebility;
public class SchoolMasterApprover extends Approver {
//构造器
public SchoolMasterApprover(String name) {
super(name);
}
@Override
public void processRequest(PurchaseRequest request) {
if (request.getPrice() > 30000) {
System.out.println(" 请求编号 id = " + request.getId() + " 被 " + this.name + " 处理");
}else { // 如果他处理不了，就让他的后继者进行处理
approver.processRequest(request);
}
}
}
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package com.sky.responsebility;
/**
* 请求类
*/
public class PurchaseRequest {
private int type = 0; // 请求类型
private float price = 0.0f; // 请求的金额
private int id = 0; // 默认当前是第一个处理者
// 构造器
public PurchaseRequest(int type, float price, int id) {
this.type = type;
this.price = price;
this.id = id;
}
// 添加对应的get方法
public int getType() {
return type;
}
public float getPrice() {
return price;
}
public int getId() {
return id;
}
}
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package com.sky.responsebility;
/**
* 客户端
*/
public class Client {
public static void main(String[] args) {
// 创建一个请求
// 可以改变金额进行测试
PurchaseRequest purchaseRequest = new PurchaseRequest(1, 30001, 1);
//创建相关的审批人、
Approver departmentApprover = new DepartmentApprover("张主任");
Approver collageApprover = new CollageApprover("李院长");
Approver viceSchoolMasterApprover = new ViceSchoolMasterApprover("王副校长");
Approver schoolMasterApprover = new SchoolMasterApprover("童校长");
//需要将各个审批级别的下一个处理者设置好（处理人构成环形：【否则会报NullPointerException】）
departmentApprover.setApprover(collageApprover);
collageApprover.setApprover(viceSchoolMasterApprover);
viceSchoolMasterApprover.setApprover(schoolMasterApprover);
schoolMasterApprover.setApprover(departmentApprover);
//进行请求的处理
departmentApprover.processRequest(purchaseRequest);
}
}
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运行结果：
请求编号 id = 1 被 童校长 处理
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