【GOF23设计模式】责任链模式
2016-08-24 13:39
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一、【GOF23设计模式】_责任链模式、公文审批、供应链系统的采购审批、异常链、过滤器和拦截器调用过程
一、【GOF23设计模式】_责任链模式、公文审批、供应链系统的采购审批、异常链、过滤器和拦截器调用过程
package com.test.chainOfResp; /** * 封装请假的基本信息 */ public class LeaveRequest { private String empName; private int leaveDays; private String reason; public LeaveRequest(String empName, int leaveDays, String reason) { super(); this.empName = empName; this.leaveDays = leaveDays; this.reason = reason; } public String getEmpName() { return empName; } public void setEmpName(String empName) { this.empName = empName; } public int getLeaveDays() { return leaveDays; } public void setLeaveDays(int leaveDays) { this.leaveDays = leaveDays; } public String getReason() { return reason; } public void setReason(String reason) { this.reason = reason; } }
package com.test.chainOfResp; /** * 抽象类 */ public abstract class Leader { protected String name; protected Leader nextLeader;//责任链上的后继对象 public Leader(String name) { super(); this.name = name; } //设定责任链上的后继对象 public void setNextLeader(Leader nextLeader) { this.nextLeader = nextLeader; } /** * 处理请求的核心的业务方法 * @param leaveRequest */ public abstract void handleRequest(LeaveRequest leaveRequest); }
package com.test.chainOfResp; /** * 主任 */ public class Director extends Leader{ public Director(String name) { super(name); } @Override public void handleRequest(LeaveRequest leaveRequest) { if(leaveRequest.getLeaveDays() < 3){ System.out.println("员工:"+leaveRequest.getEmpName()+"请假,天数:"+leaveRequest.getLeaveDays()+",理由:"+leaveRequest.getReason()); System.out.println("主任:"+this.name+",审批通过!"); }else{ if(this.nextLeader != null){ this.nextLeader.handleRequest(leaveRequest); } } } }
package com.test.chainOfResp; /** * 经理 */ public class Manager extends Leader{ public Manager(String name) { super(name); } @Override public void handleRequest(LeaveRequest leaveRequest) { if(leaveRequest.getLeaveDays() < 10){ System.out.println("员工:"+leaveRequest.getEmpName()+"请假,天数:"+leaveRequest.getLeaveDays()+",理由:"+leaveRequest.getReason()); System.out.println("经理:"+this.name+",审批通过!"); }else{ if(this.nextLeader != null){ this.nextLeader.handleRequest(leaveRequest); } } } }
package com.test.chainOfResp; /** * 总经理 */ public class GeneralManager extends Leader{ public GeneralManager(String name) { super(name); } @Override public void handleRequest(LeaveRequest leaveRequest) { if(leaveRequest.getLeaveDays() < 30){ System.out.println("员工:"+leaveRequest.getEmpName()+"请假,天数:"+leaveRequest.getLeaveDays()+",理由:"+leaveRequest.getReason()); System.out.println("总经理:"+this.name+",审批通过!"); }else{ System.out.println("莫非"+leaveRequest.getEmpName()+"想辞职,居然请假"+leaveRequest.getLeaveDays()+"天!"); } } }
package com.test.chainOfResp; /** * 副总经理 */ public class ViceGeneralManager extends Leader{ public ViceGeneralManager(String name) { super(name); } @Override public void handleRequest(LeaveRequest leaveRequest) { if(leaveRequest.getLeaveDays() < 20){ System.out.println("员工:"+leaveRequest.getEmpName()+"请假,天数:"+leaveRequest.getLeaveDays()+",理由:"+leaveRequest.getReason()); System.out.println("副总经理:"+this.name+",审批通过!"); }else{ if(this.nextLeader != null){ this.nextLeader.handleRequest(leaveRequest); } } } }
package com.test.chainOfResp; public class Client { public static void main(String[] args) { Leader a = new Director("张三"); Leader b = new Manager("李四"); Leader b2 = new ViceGeneralManager("李小四");//新增逻辑,副总经理 Leader c = new GeneralManager("王五"); //组织责任链对象的关系 a.setNextLeader(b); b.setNextLeader(b2);//新增关系 b2.setNextLeader(c); //开始请假操作 LeaveRequest leaveRequest = new LeaveRequest("Tom", 15, "回英国老家探亲!"); a.handleRequest(leaveRequest); } }
控制台输出: 员工:Tom请假,天数:15,理由:回英国老家探亲! 副总经理:李小四,审批通过!
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