设计模式：State
针对问题
假设要开发一个工作流程，流程里包括提交、审批、通过、退回几个步骤，一种设计方案如下：
public class Flow
{
//...other fields
int state;
}
public class FlowController
{
public void handleRequest(Flow flow){
if(flow.getState()==0)
{
//do something
}
else if(flow.getState()==1)
{
//do something
}
}
}
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public class Flow { //...other fields int state; } public class FlowController { public void handleRequest(Flow flow){ if(flow.getState()==0) { //do something } else if(flow.getState()==1) { //do something |