//这个例子不是很好。

//Hand*er

interface RequestHandle {

void handleRequest(Request request);

}

//ConcreteHandler

class HRRequestHandle implements RequestHandle {

public void handleRequest(Request request) {

if (request instanceof DimissionRequest) {

System.out.println("要离职, 人事审批!");

}

System.out.println("请求完成");

}

}

class PMRequestHandle implements RequestHandle {

RequestHandle rh;

public PMRequestHandle(RequestHandle rh) {

this.rh = rh;

}

public void handleRequest(Request request) {

if (request instanceof AddMoneyRequest) {

System.out.println("要加薪, 项目经理审批!");

} else {

rh.handleRequest(request);

}

}

}

class TLRequestHandle implements RequestHandle {

RequestHandle rh;

public TLRequestHandle(RequestHandle rh) {

this.rh = rh;

}

public void handleRequest(Request request) {

if (request instanceof LeaveRequest) {

System.out.println("要请假, 项目组长审批!");

} else {

rh.handleRequest(request);

}

}

}

public class DF13_CHAIN{

public static void main(String[] args) {

RequestHandle hr =new HRRequestHandle();

RequestHandle pm = new PMRequestHandle(hr);

RequestHandle tl = new TLRequestHandle(pm);

//team leader处理离职请求

Request request = new DimissionRequest();

tl.handleRequest(request);

System.out.println("===========");

//team leader处理加薪请求

request = new AddMoneyRequest();

tl.handleRequest(request);

System.out.println("========");

//项目经理上理辞职请求

request = new DimissionRequest();

pm.handleRequest(request);

}

}