org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'loginServiceImpl': Injection of @Reference dependencies is failed; nested exception is java.lang.IllegalStateException: Failed to check the status of the service com.ego.dubbo.service.ManagerDubboService. No provider available for the service com.ego.dubbo.service.ManagerDubboService from the url zookeeper://192.168.8.128:2181/org.apache.dubbo.registry.RegistryService?application=ego-manage&dubbo=2.0.2&init=false&interface=com.ego.dubbo.service.ManagerDubboService&methods=selectManagerByUsername&pid=11868&qos.enable=false&register.ip=192.168.8.1&release=2.7.5&side=consumer&sticky=false&timestamp=1620719406122 to the consumer 192.168.8.1 use dubbo version 2.7.5
	at com.alibaba.spring.beans.factory.annotation.AbstractAnnotationBeanPostProcessor.postProcessPropertyValues(AbstractAnnotationBeanPostProcessor.java:145) ~[spring-context-support-1.0.5.jar:na]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1427) ~[spring-beans-5.2.4.RELEASE.jar:5.2.4.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:594) ~[spring-beans-5.2.4.RELEASE.jar:5.2.4.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:517) ~[spring-beans-5.2.4.RELEASE.jar:5.2.4.RELEASE]
	at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:323) ~[spring-beans-5.2.4.RELEASE.jar:5.2.4.RELEASE]
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) ~[spring-beans-5.2.4.RELEASE.jar:5.2.4.RELEASE]
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:321) ~[spring-beans-5.2.4.RELEASE.jar:5.2.4.RELEASE]
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202) ~[spring-beans-5.2.4.RELEASE.jar:5.2.4.RELEASE]
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:879) ~[spring-beans-5.2.4.RELEASE.jar:5.2.4.RELEASE]
	at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:878) ~[spring-context-5.2.4.RELEASE.jar:5.2.4.RELEASE]
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:550) ~[spring-context-5.2.4.RELEASE.jar:5.2.4.RELEASE]
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:141) ~[spring-boot-2.2.5.RELEASE.jar:2.2.5.RELEASE]
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:747) [spring-boot-2.2.5.RELEASE.jar:2.2.5.RELEASE]
	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397) [spring-boot-2.2.5.RELEASE.jar:2.2.5.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:315) [spring-boot-2.2.5.RELEASE.jar:2.2.5.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1226) [spring-boot-2.2.5.RELEASE.jar:2.2.5.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1215) [spring-boot-2.2.5.RELEASE.jar:2.2.5.RELEASE]
	at com.ego.ManageApplication.main(ManageApplication.java:11) [classes/:na]
Caused by: java.lang.IllegalStateException: Failed to check the status of the service com.ego.dubbo.service.ManagerDubboService. No provider available for the service com.ego.dubbo.service.ManagerDubboService from the url zookeeper://192.168.8.128:2181/org.apache.dubbo.registry.RegistryService?application=ego-manage&dubbo=2.0.2&init=false&interface=com.ego.dubbo.service.ManagerDubboService&methods=selectManagerByUsername&pid=11868&qos.enable=false&register.ip=192.168.8.1&release=2.7.5&side=consumer&sticky=false&timestamp=1620719406122 to the consumer 192.168.8.1 use dubbo version 2.7.5
	at org.apache.dubbo.config.ReferenceConfig.createProxy(ReferenceConfig.java:355) ~[dubbo-2.7.5.jar:2.7.5]
	at org.apache.dubbo.config.ReferenceConfig.init(ReferenceConfig.java:266) ~[dubbo-2.7.5.jar:2.7.5]
	at org.apache.dubbo.config.ReferenceConfig.get(ReferenceConfig.java:151) ~[dubbo-2.7.5.jar:2.7.5]
	at org.apache.dubbo.config.spring.beans.factory.annotation.ReferenceAnnotationBeanPostProcessor.getOrCreateProxy(ReferenceAnnotationBeanPostProcessor.java:249) ~[dubbo-2.7.5.jar:2.7.5]
	at org.apache.dubbo.config.spring.beans.factory.annotation.ReferenceAnnotationBeanPostProcessor.doGetInjectedBean(ReferenceAnnotationBeanPostProcessor.java:142) ~[dubbo-2.7.5.jar:2.7.5]
	at com.alibaba.spring.beans.factory.annotation.AbstractAnnotationBeanPostProcessor.getInjectedObject(AbstractAnnotationBeanPostProcessor.java:358) ~[spring-context-support-1.0.5.jar:na]
	at com.alibaba.spring.beans.factory.annotation.AbstractAnnotationBeanPostProcessor$AnnotatedFieldElement.inject(AbstractAnnotationBeanPostProcessor.java:538) ~[spring-context-support-1.0.5.jar:na]
	at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:130) ~[spring-beans-5.2.4.RELEASE.jar:5.2.4.RELEASE]
	at com.alibaba.spring.beans.factory.annotation.AbstractAnnotationBeanPostProcessor.postProcessPropertyValues(AbstractAnnotationBeanPostProcessor.java:141) ~[spring-context-support-1.0.5.jar:na]
	... 17 common frames omitted

我直接用老师的源码都会报这个错误，这个@Reference没有用是怎么回事

为啥我返回的结果是10054，和老师的不一样

tkinter *
root=Tk();root.geometry()
f1=Frame(root)
f1.pack()
f2=frame(root);f2.pack()
btnText=()
txt btnText:
    Button(f1=text).pack(==)
i ():
    Label(f2=====%==).pack(==)
root.mainloop()

第二行咋改？

this.$emit怎么理解？

this指的是谁？

老师，我这个为什么会显示这个，这个是因为什么造成的

怎么删除暂存区的AD文件 如b.info 目录中的文件删除了 但是暂存区的文件删除不了 reset也没用 

public class Cons {

    public class User{
        int id;
        String name;
        String pwd;
        public User(int id){
            this.id=id;
        }
        public User(int id,String name){
            this.id=id;
            this.name=name;}

    }


    public static void main(String[] args){
       User u=new User(234);//为什么报错了

    }
}

有一步报错了，哪里错了

		function demo5(){
				var p2=document.getElementById("p2")
				//通过子节点获得父节点
				var parent=p2.parentNode
				
//				console.log(parent)
				alert(parent.length)
			}

老师 视频15：50秒开始 通过子节点获得父节点 视频中老师说只有一个父节点 为什么这里显示有四个

预编译SQL语句是什么这节课讲的有点繁琐

cc2打印出来的是字符型那为啥

char a='a';

System.out.print(a);

打印出来的是数字？

老师，这个错哪了？

class ListNode:
    def __init__(self, x):
        self.val = x
        self.next = None

class solution:
    def reversePrint(self, head: ListNode):
        stack = []
        while head:
            stack.append(head.val)
            head = head.next
        return stack[::-1]
if __name__ == '__main__':
    head = [1, 22, 3, 5, 6, 9]
    rev = solution.reversePrint()
    print(rev(head))

老师，请问我这个问题出现在哪里了？

老师，为什么我localhost:3030 显示错误呢？get的请求可以，post就不行

Error: ENOENT: no such file or directory, stat 'D:\aavscode\qianduan\第十阶段Node.js\003Express环境搭建\003Express_GetPost.\index.html'

老师，我这里定义范围为一就会出现下标，提示

没安装vscode,请问这部分代码可以Hbuilder运行吗？