1、定义
责任链模式：将请求的发送者和接受者解耦，使得多个对象都有处理这个请求的机会
写法
public interface InvokerHandler {
//汇报工作
void requestPermission(InvokerHandler handler);
//处理核心逻辑
void handleRequest(int limit);
//当前权限
int hasLimit();
//当前职位
String hasJob();
}
/**
* 责任链
*/
public abstract class Leader implements InvokerHandler{
private InvokerHandler nextHandler;
@Override
public void requestPermission(InvokerHandler handler) {
this.nextHandler = handler;
}
@Override
public void handleRequest(int limit) {
if (limit <= hasLimit()){
System.out.println(hasJob()+"拥有权限" +limit+"额度，审批");
}else{
if(nextHandler == null){
System.out.println("没有上级汇报对象");
}else {
nextHandler.handleRequest( limit );
}
}
}
}
public class Boss extends Leader {
@Override
public int hasLimit() {
return Integer.MAX_VALUE;
}
@Override
public String hasJob() {
return "老板";
}
}
public class Director extends Leader{
@Override
public int hasLimit() {
return 5000;
}
@Override
public String hasJob() {
return "主管";
}
}
public class Group extends Leader{
@Override
public int hasLimit() {
return 3000;
}
@Override
public String hasJob() {
return "组员";
}
}
//经理
public class Manager extends Leader {
@Override
public int hasLimit() {
return 10000;
}
@Override
public String hasJob() {
return "经理";
}
}
/**
* 责任链模式
*/
public class TestMain {
public static void main(String[] args){
Boss boss = new Boss();
Manager manager = new Manager();
Director director = new Director();
Group group = new Group();
//确定汇报关系
group.requestPermission( director );
director.requestPermission( manager );
manager.requestPermission( boss );
boss.requestPermission( null );
//组员汇报
group.handleRequest( 2000 );
//主管处理
director.handleRequest( 300 );
//经理处理
manager.handleRequest( 20000 );
//老板处理
boss.handleRequest( 100 );
boss.handleRequest( 1000 );
boss.handleRequest( 900000 );
}
}
