职责链模式

1、抽象基类

public abstract classHandler {

protected Handler handlerNext;

public abstractString handlerRequest(String user,doublefee);

publicHandler getHandlerNext() {

return HandlerNext;

}

public void setHandlerNext(Handler handlerNext) {

HandlerNext= handlerNext;

}

}

2、具体实现类

1）public classProjectManagerextendsHandler {

@Override

publicString handlerRequest(String user,doublefee) {

String response =newString("project");

return this.getHandlerNext().handlerRequest("user", fee);

}

}

2）

public classDeptManagerextendsHandler {

@Override

publicString handlerRequest(String user,doublefee) {

String response =newString("Dept manager");

return response;

}

}

3、测试+组装职责链

public classtest {

public static voidmain(String[] args) {

//组装职责链

ProjectManager projectManager =newProjectManager();

DeptManager deptManager =newDeptManager();

projectManager.setHandlerNext(deptManager);

String response = projectManager.handlerRequest("zhangsan",34);

}

}