错误。
增加or修改处理一个请求的结构。增强了给对象指派职责的灵活性。
import java.util.ArrayList;
/**
-
@Author: cxh
-
@CreateTime: 18/1/27 19:40
-
@ProjectName: JavaBaseTest
*/
public class Client{
public static void main(String[] args) {
ManagerLev1 lev1=new ManagerLev1();
ManagerLev2 lev2=new ManagerLev2();
ManagerLev3 lev3=new ManagerLev3();
lev1.setHandler(lev2);
lev2.setHandler(lev3);
Request request1=new Request("李静",3);
Request request2=new Request("黎明",10);
Request request3=new Request("周青",4);
Request request4=new Request("纪静",1);
ArrayList<Request> list=new ArrayList<>();
list.add(request1);
list.add(request2);
list.add(request3);
list.add(request4);
list.stream().forEach(request -> lev1.getResult(request));
}
}
/**
- @Author: cxh
- @CreateTime: 18/1/27 19:41
- @ProjectName: JavaBaseTest
*/
public abstract class Handler{
protected Handler handler;
Handler(){}
public void setHandler(Handler handler) {
this.handler = handler;
}
abstract void getResult(Request request);
}
/**
-
@Author: cxh
-
@CreateTime: 18/1/27 19:43
-
@ProjectName: JavaBaseTest
*/
public class ManagerLev1 extends Handler{
@Override
void getResult(Request request) {
String name=request.getName();
int days=request.getDays();
if(days<=2){
System.out.println(name+"请假"+days+"天的请求得到批准! and 请假级别:lev1");
}else{
super.handler.getResult(request);
}
}
}
/**
- @Author: cxh
- @CreateTime: 18/1/27 19:43
- @ProjectName: JavaBaseTest
*/
public class ManagerLev2 extends Handler {
@Override
void getResult(Request request) {
String name=request.getName();
int days=request.getDays();
if(days<=5){
System.out.println(name+"请假"+days+"天的请求得到批准! and 请假级别:lev2");
}else{
super.handler.getResult(request);
}
}
}
/**
- @Author: cxh
- @CreateTime: 18/1/27 19:43
- @ProjectName: JavaBaseTest
*/
public class ManagerLev3 extends Handler {
@Override
void getResult(Request request) {
String name=request.getName();
int days=request.getDays();
System.out.println(name+"请假"+days+"天的请求得到批准! and 请假级别:lev3");
}
}
/**
-
@Author: cxh
-
@CreateTime: 18/1/27 19:45
-
@ProjectName: JavaBaseTest
*/
public class Request {
private String name;
private int days;
Request(String name,int d) {
this.name = name;
this.days = d;
}
public String getName() {
return name;
}
public int getDays() {
return days;
}
}
参考书籍：《大话设计模式》－程杰
