工作流中的请假流程
某人提出请假申请，先由项目经理审批，如果项目经理不同意，审批就直接结束
如项目经理同意，再看是否超过3天，如果三天以内，审批直接结束
否则，交给部门经理，部门经理审核后，无论是否同意，审批直接结束
状态类
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package com.cmc;public abstract class State { public abstract void shenPi(Work w);} |
项目经理类，继承了状态类，并实现了状态由项目经理审批转移至部门经理审批：
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package com.cmc;public class ProjectManager extends State { @Override public void shenPi(Work w) { if(w.isManagermentAccept()==false){ System.out.println("项目经理不同意，审批结束！"); }else{ if(w.getDay()<=3){ System.out.println("请假时间在三天以内，项目经理同意，审批结束"); }else{ System.out.println("请假时间大于三天，移交给部门经理处理！"); w.setCurrent(new PartmentMeneger()); w.shenPi(); } } }} |
部门经理类：
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package com.cmc;public class PartmentMeneger extends State { @Override public void shenPi(Work w) { System.out.println("已经过部门经理审批，审批结束！"); }} |
工作类，拥有一个State的对象，在shenPi方法中将自己回传给State：
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package com.cmc;public class Work { private State current; private int day; private boolean isManagermentAccept; public Work() { current = new ProjectManager(); } public State getCurrent() { return current; } public void setCurrent(State current) { this.current = current; } public int getDay() { return day; } public void setDay(int day) { this.day = day; } public boolean isManagermentAccept() { return isManagermentAccept; } public void setManagermentAccept(boolean isManagermentAccept) { this.isManagermentAccept = isManagermentAccept; } public void shenPi(){ current.shenPi(this); }} |
客户端测试一下：
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package com.cmc;public class Client { public static void main(String [] args){ Work w = new Work(); w.setDay(4); w.setManagermentAccept(true); w.shenPi(); }} |
原文：http://www.cnblogs.com/yuhuameng/p/4952593.html