责任链设计模式

package com.jmj.pattern.responsibility;/*** 请假条类*/
public class LeaveRequest {//姓名private String name;//请假天数private int num;//请假内容private String content;public LeaveRequest(String name, int num, String content) {this.name = name;this.num = num;this.content = content;}public String getName() {return name;}public void setName(String name) {this.name = name;}public int getNum() {return num;}public void setNum(int num) {this.num = num;}public String getContent() {return content;}public void setContent(String content) {this.content = content;}
}

package com.jmj.pattern.responsibility;public abstract class Handler {protected final static int NUM_ONE=1;protected final static int NUM_THREE=3;protected final static int NUM_SEVEN=7;//该领导处理的请求天数区间private int numStart;private int numEnd;private Handler nextHandler;public Handler(int numStart) {this.numStart = numStart;}public Handler(int numStart, int numEnd) {this.numStart = numStart;this.numEnd = numEnd;}public void setNextHandler(Handler nextHandler) {this.nextHandler = nextHandler;}//各级领导处理请假条的方法protected abstract void handleLeave(LeaveRequest leave);public final void submit(LeaveRequest leave){if (this.nextHandler!=null&&leave.getNum()>this.numEnd){this.nextHandler.submit(leave);}else {this.handleLeave(leave);System.out.println("流程结束 !");}}}

package com.jmj.pattern.responsibility;public class GeneralManager extends Handler{public GeneralManager(){super(Handler.NUM_THREE,Handler.NUM_SEVEN);}@Overrideprotected void handleLeave(LeaveRequest leave) {System.out.println(leave.getName()+"请假"+leave.getNum()+"天，"+leave.getContent()+"。");System.out.println("总经理审批:同意");}
}

package com.jmj.pattern.responsibility;public class Manager extends Handler{public Manager(){super(Handler.NUM_ONE,Handler.NUM_THREE);}@Overrideprotected void handleLeave(LeaveRequest leave) {System.out.println(leave.getName()+"请假"+leave.getNum()+"天，"+leave.getContent()+"。");System.out.println("部门经理审批:同意");}
}

package com.jmj.pattern.responsibility;public class GroupLeader extends Handler{public GroupLeader(){super(0,Handler.NUM_ONE);}@Overrideprotected void handleLeave(LeaveRequest leave) {System.out.println(leave.getName()+"请假"+leave.getNum()+"天，"+leave.getContent()+"。");System.out.println("小组长审批:同意");}
}

package com.jmj.pattern.responsibility;public class Client {public static void main(String[] args) {LeaveRequest leaveRequest = new LeaveRequest("张三", 5, "身体不适");GroupLeader groupLeader = new GroupLeader();Manager manager = new Manager();GeneralManager generalManager = new GeneralManager();groupLeader.setNextHandler(manager);manager.setNextHandler(generalManager);groupLeader.submit(leaveRequest);}
}