请问一下，老师说的每个像素点的值其实是有三个值（RGB）么？某个输入节点代表的是某一个像素点的某一个通道的值么？还请告知，多谢！

请问一下，1.彩色图片有三个通道的话，那么这三个通道（rgb）是怎么构成不同的颜色的？每个网格代表了三个维度

                    （三个输入节点么）？

                 2.感受野可以理解为第一个隐藏层每个神经元观测到网格数量的大小么？

1. 老师我有两个问题请教

2. 图片上传功能能否使用其他技术实现，尝试过星愿浏览器，谷歌浏览器和火狐浏览器均不支持flash使用，如何解决。

3. 每次服务启动之后，第一次登录提示登录失败，第二次开始均正常，且第一次登录后台报错，报错信息为

4. 2021-08-10 09:01:10.373 ERROR 9656 --- [nio-8081-exec-4] w.a.UsernamePasswordAuthenticationFilter : An internal error occurred while trying to authenticate the user.
   
   org.springframework.security.authentication.InternalAuthenticationServiceException: Failed to invoke the method selectManagerByUsername in the service com.ego.dubbo.service.ManagerDubboService. Tried 3 times of the providers [192.168.57.1:20880] (1/1) from the registry 192.168.57.132:2181 on the consumer 192.168.255.1 using the dubbo version 2.7.6. Last error is: Invoke remote method timeout. method: selectManagerByUsername, provider: dubbo://192.168.57.1:20880/com.ego.dubbo.service.ManagerDubboService?anyhost=true&application=geo-manager&check=false&default=true&deprecated=false&dubbo=2.0.2&dynamic=true&generic=false&init=false&interface=com.ego.dubbo.service.ManagerDubboService&methods=selectManagerByUsername&pid=9656&qos.enable=false&register.ip=192.168.255.1&release=2.7.6&remote.application=ego_provider&side=consumer&sticky=false&timestamp=1628557228139, cause: org.apache.dubbo.remoting.TimeoutException: Waiting server-side response timeout by scan timer. start time: 2021-08-10 09:01:09.349, end time: 2021-08-10 09:01:10.368, client elapsed: 1 ms, server elapsed: 1018 ms, timeout: 1000 ms, request: Request [id=2, version=2.0.2, twoway=true, event=false, broken=false, data=RpcInvocation [methodName=selectManagerByUsername, parameterTypes=[class java.lang.String], arguments=[admin], attachments={path=com.ego.dubbo.service.ManagerDubboService, remote.application=geo-manager, interface=com.ego.dubbo.service.ManagerDubboService, version=0.0.0}]], channel: /192.168.57.1:14222 -> /192.168.57.1:20880
   	at org.springframework.security.authentication.dao.DaoAuthenticationProvider.retrieveUser(DaoAuthenticationProvider.java:123) ~[spring-security-core-5.2.2.RELEASE.jar:5.2.2.RELEASE]
   	at org.springframework.security.authentication.dao.AbstractUserDetailsAuthenticationProvider.authenticate(AbstractUserDetailsAuthenticationProvider.java:144) ~[spring-security-core-5.2.2.RELEASE.jar:5.2.2.RELEASE]
   	at org.springframework.security.authentication.ProviderManager.authenticate(ProviderManager.java:175) ~[spring-security-core-5.2.2.RELEASE.jar:5.2.2.RELEASE]
   	at org.springframework.security.authentication.ProviderManager.authenticate(ProviderManager.java:195) ~[spring-security-core-5.2.2.RELEASE.jar:5.2.2.RELEASE]
   	at org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter.attemptAuthentication(UsernamePasswordAuthenticationFilter.java:95) ~[spring-security-web-5.2.2.RELEASE.jar:5.2.2.RELEASE]
   	at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:212) ~[spring-security-web-5.2.2.RELEASE.jar:5.2.2.RELEASE]
   	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334) [spring-security-web-5.2.2.RELEASE.jar:5.2.2.RELEASE]
   	at org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:116) [spring-security-web-5.2.2.RELEASE.jar:5.2.2.RELEASE]
   	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334) [spring-security-web-5.2.2.RELEASE.jar:5.2.2.RELEASE]
   	at org.springframework.security.web.header.HeaderWriterFilter.doHeadersAfter(HeaderWriterFilter.java:92) [spring-security-web-5.2.2.RELEASE.jar:5.2.2.RELEASE]
   	at org.springframework.security.web.header.HeaderWriterFilter.doFilterInternal(HeaderWriterFilter.java:77) [spring-security-web-5.2.2.RELEASE.jar:5.2.2.RELEASE]
   	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) [spring-web-5.2.4.RELEASE.jar:5.2.4.RELEASE]
   	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334) [spring-security-web-5.2.2.RELEASE.jar:5.2.2.RELEASE]
   	at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:105) [spring-security-web-5.2.2.RELEASE.jar:5.2.2.RELEASE]
   	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334) [spring-security-web-5.2.2.RELEASE.jar:5.2.2.RELEASE]
   	at org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter.doFilterInternal(WebAsyncManagerIntegrationFilter.java:56) [spring-security-web-5.2.2.RELEASE.jar:5.2.2.RELEASE]
   	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) [spring-web-5.2.4.RELEASE.jar:5.2.4.RELEASE]
   	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334) [spring-security-web-5.2.2.RELEASE.jar:5.2.2.RELEASE]
   	at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:215) [spring-security-web-5.2.2.RELEASE.jar:5.2.2.RELEASE]
   	at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:178) [spring-security-web-5.2.2.RELEASE.jar:5.2.2.RELEASE]
   	at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:358) [spring-web-5.2.4.RELEASE.jar:5.2.4.RELEASE]
   	at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:271) [spring-web-5.2.4.RELEASE.jar:5.2.4.RELEASE]
   	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-9.0.31.jar:9.0.31]
   	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-9.0.31.jar:9.0.31]
   	at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100) [spring-web-5.2.4.RELEASE.jar:5.2.4.RELEASE]
   	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) [spring-web-5.2.4.RELEASE.jar:5.2.4.RELEASE]
   	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-9.0.31.jar:9.0.31]
   	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-9.0.31.jar:9.0.31]
   	at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93) [spring-web-5.2.4.RELEASE.jar:5.2.4.RELEASE]
   	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) [spring-web-5.2.4.RELEASE.jar:5.2.4.RELEASE]
   	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-9.0.31.jar:9.0.31]
   	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-9.0.31.jar:9.0.31]
   	at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201) [spring-web-5.2.4.RELEASE.jar:5.2.4.RELEASE]
   	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) [spring-web-5.2.4.RELEASE.jar:5.2.4.RELEASE]
   	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-9.0.31.jar:9.0.31]
   	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-9.0.31.jar:9.0.31]
   	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202) [tomcat-embed-core-9.0.31.jar:9.0.31]
   	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) [tomcat-embed-core-9.0.31.jar:9.0.31]
   	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:541) [tomcat-embed-core-9.0.31.jar:9.0.31]
   	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139) [tomcat-embed-core-9.0.31.jar:9.0.31]
   	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) [tomcat-embed-core-9.0.31.jar:9.0.31]
   	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74) [tomcat-embed-core-9.0.31.jar:9.0.31]
   	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343) [tomcat-embed-core-9.0.31.jar:9.0.31]
   	at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:367) [tomcat-embed-core-9.0.31.jar:9.0.31]
   	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65) [tomcat-embed-core-9.0.31.jar:9.0.31]
   	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:868) [tomcat-embed-core-9.0.31.jar:9.0.31]
   	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1639) [tomcat-embed-core-9.0.31.jar:9.0.31]
   	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-embed-core-9.0.31.jar:9.0.31]
   	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [na:1.8.0_202]
   	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [na:1.8.0_202]
   	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-9.0.31.jar:9.0.31]
   	at java.lang.Thread.run(Thread.java:748) [na:1.8.0_202]
   Caused by: org.apache.dubbo.rpc.RpcException: Failed to invoke the method selectManagerByUsername in the service com.ego.dubbo.service.ManagerDubboService. Tried 3 times of the providers [192.168.57.1:20880] (1/1) from the registry 192.168.57.132:2181 on the consumer 192.168.255.1 using the dubbo version 2.7.6. Last error is: Invoke remote method timeout. method: selectManagerByUsername, provider: dubbo://192.168.57.1:20880/com.ego.dubbo.service.ManagerDubboService?anyhost=true&application=geo-manager&check=false&default=true&deprecated=false&dubbo=2.0.2&dynamic=true&generic=false&init=false&interface=com.ego.dubbo.service.ManagerDubboService&methods=selectManagerByUsername&pid=9656&qos.enable=false&register.ip=192.168.255.1&release=2.7.6&remote.application=ego_provider&side=consumer&sticky=false&timestamp=1628557228139, cause: org.apache.dubbo.remoting.TimeoutException: Waiting server-side response timeout by scan timer. start time: 2021-08-10 09:01:09.349, end time: 2021-08-10 09:01:10.368, client elapsed: 1 ms, server elapsed: 1018 ms, timeout: 1000 ms, request: Request [id=2, version=2.0.2, twoway=true, event=false, broken=false, data=RpcInvocation [methodName=selectManagerByUsername, parameterTypes=[class java.lang.String], arguments=[admin], attachments={path=com.ego.dubbo.service.ManagerDubboService, remote.application=geo-manager, interface=com.ego.dubbo.service.ManagerDubboService, version=0.0.0}]], channel: /192.168.57.1:14222 -> /192.168.57.1:20880
   	at org.apache.dubbo.rpc.cluster.support.FailoverClusterInvoker.doInvoke(FailoverClusterInvoker.java:113) ~[dubbo-2.7.6.jar:2.7.6]
   	at org.apache.dubbo.rpc.cluster.support.AbstractClusterInvoker.invoke(AbstractClusterInvoker.java:259) ~[dubbo-2.7.6.jar:2.7.6]
   	at org.apache.dubbo.rpc.cluster.interceptor.ClusterInterceptor.intercept(ClusterInterceptor.java:47) ~[dubbo-2.7.6.jar:2.7.6]
   	at org.apache.dubbo.rpc.cluster.support.wrapper.AbstractCluster$InterceptorInvokerNode.invoke(AbstractCluster.java:92) ~[dubbo-2.7.6.jar:2.7.6]
   	at org.apache.dubbo.rpc.cluster.support.wrapper.MockClusterInvoker.invoke(MockClusterInvoker.java:82) ~[dubbo-2.7.6.jar:2.7.6]
   	at org.apache.dubbo.rpc.proxy.InvokerInvocationHandler.invoke(InvokerInvocationHandler.java:74) ~[dubbo-2.7.6.jar:2.7.6]
   	at org.apache.dubbo.common.bytecode.proxy1.selectManagerByUsername(proxy1.java) ~[dubbo-2.7.6.jar:2.7.6]
   	at com.ego.service.impl.LoginServiceImpl.loadUserByUsername(LoginServiceImpl.java:21) ~[classes/:na]
   	at org.springframework.security.authentication.dao.DaoAuthenticationProvider.retrieveUser(DaoAuthenticationProvider.java:108) ~[spring-security-core-5.2.2.RELEASE.jar:5.2.2.RELEASE]
   	... 51 common frames omitted
   Caused by: java.util.concurrent.ExecutionException: org.apache.dubbo.remoting.TimeoutException: Waiting server-side response timeout by scan timer. start time: 2021-08-10 09:01:09.349, end time: 2021-08-10 09:01:10.368, client elapsed: 1 ms, server elapsed: 1018 ms, timeout: 1000 ms, request: Request [id=2, version=2.0.2, twoway=true, event=false, broken=false, data=RpcInvocation [methodName=selectManagerByUsername, parameterTypes=[class java.lang.String], arguments=[admin], attachments={path=com.ego.dubbo.service.ManagerDubboService, remote.application=geo-manager, interface=com.ego.dubbo.service.ManagerDubboService, version=0.0.0}]], channel: /192.168.57.1:14222 -> /192.168.57.1:20880
   	at java.util.concurrent.CompletableFuture.reportGet(CompletableFuture.java:357) ~[na:1.8.0_202]
   	at java.util.concurrent.CompletableFuture.get(CompletableFuture.java:1915) ~[na:1.8.0_202]
   	at org.apache.dubbo.rpc.AsyncRpcResult.get(AsyncRpcResult.java:181) ~[dubbo-2.7.6.jar:2.7.6]
   	at org.apache.dubbo.rpc.protocol.AsyncToSyncInvoker.invoke(AsyncToSyncInvoker.java:61) ~[dubbo-2.7.6.jar:2.7.6]
   	at org.apache.dubbo.rpc.listener.ListenerInvokerWrapper.invoke(ListenerInvokerWrapper.java:78) ~[dubbo-2.7.6.jar:2.7.6]
   	at org.apache.dubbo.monitor.support.MonitorFilter.invoke(MonitorFilter.java:89) ~[dubbo-2.7.6.jar:2.7.6]
   	at org.apache.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:81) ~[dubbo-2.7.6.jar:2.7.6]
   	at org.apache.dubbo.rpc.protocol.dubbo.filter.FutureFilter.invoke(FutureFilter.java:51) ~[dubbo-2.7.6.jar:2.7.6]
   	at org.apache.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:81) ~[dubbo-2.7.6.jar:2.7.6]
   	at org.apache.dubbo.rpc.filter.ConsumerContextFilter.invoke(ConsumerContextFilter.java:55) ~[dubbo-2.7.6.jar:2.7.6]
   	at org.apache.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:81) ~[dubbo-2.7.6.jar:2.7.6]
   	at org.apache.dubbo.rpc.protocol.InvokerWrapper.invoke(InvokerWrapper.java:56) ~[dubbo-2.7.6.jar:2.7.6]
   	at org.apache.dubbo.rpc.cluster.support.FailoverClusterInvoker.doInvoke(FailoverClusterInvoker.java:82) ~[dubbo-2.7.6.jar:2.7.6]
   	... 59 common frames omitted
   Caused by: org.apache.dubbo.remoting.TimeoutException: Waiting server-side response timeout by scan timer. start time: 2021-08-10 09:01:09.349, end time: 2021-08-10 09:01:10.368, client elapsed: 1 ms, server elapsed: 1018 ms, timeout: 1000 ms, request: Request [id=2, version=2.0.2, twoway=true, event=false, broken=false, data=RpcInvocation [methodName=selectManagerByUsername, parameterTypes=[class java.lang.String], arguments=[admin], attachments={path=com.ego.dubbo.service.ManagerDubboService, remote.application=geo-manager, interface=com.ego.dubbo.service.ManagerDubboService, version=0.0.0}]], channel: /192.168.57.1:14222 -> /192.168.57.1:20880
   	at org.apache.dubbo.remoting.exchange.support.DefaultFuture.doReceived(DefaultFuture.java:210) ~[dubbo-2.7.6.jar:2.7.6]
   	at org.apache.dubbo.remoting.exchange.support.DefaultFuture.received(DefaultFuture.java:175) ~[dubbo-2.7.6.jar:2.7.6]
   	at org.apache.dubbo.remoting.exchange.support.DefaultFuture$TimeoutCheckTask.notifyTimeout(DefaultFuture.java:298) ~[dubbo-2.7.6.jar:2.7.6]
   	at org.apache.dubbo.remoting.exchange.support.DefaultFuture$TimeoutCheckTask.lambda$run$0(DefaultFuture.java:285) ~[dubbo-2.7.6.jar:2.7.6]
   	at org.apache.dubbo.common.threadpool.ThreadlessExecutor.waitAndDrain(ThreadlessExecutor.java:93) ~[dubbo-2.7.6.jar:2.7.6]
   	at org.apache.dubbo.rpc.AsyncRpcResult.get(AsyncRpcResult.java:179) ~[dubbo-2.7.6.jar:2.7.6]
   	... 69 common frames omitted

老师，为啥我这个打印出来的结果是11，而不是9或者是10

User {
    String String (idString nameString pwd){
        .=id.=name.=pwdSystem..println(+id++name++pwd)}
    (String[]args){
        User u1=User()User u2=User()System..println(u1)System..println(u2.toString())System..println(u1==u2)System..println(u1.equals(u2))}

  }

第一次运行输出结果

id1001name1pwd123456

id1001name1pwd123456

com.zhang.test.User@15aeb7ab

com.zhang.test.User@7b23ec81

false

false

 去掉/*后运行结果

id1001name1pwd123456

id1001name1pwd123456

com.zhang.test.User@408

com.zhang.test.User@408

false

true

使用equal方法后会直接对比实际数值，使输出结果产生上面这样的变化吗

关于为什么不能直接调用list.remove(item)方法，我想了很久，不知道理解的对不对，请老师帮忙看看：

假设，parent和children1（item）对应的内存地址分别为：0x13和0x18，那么调用list.remove方法时，则会干掉0x18，之前学习过Hashmap的底层结构，其实map的Key是存在一个数组里的。当children1有子节点时，它也会出现在该数组中，所以当0x18被干掉时，Key所在的数组也就丢失了指向。所以不能直接调用list.remove(item)

之所以使用brother.addAll(list)后，再使用brother.remove(item)不会丢失children1的子节点，是因为addAll方法，底层是调用了Arrays工具类的copyOf方法，该方法对数组进行扩容，会新开辟一块内存空间进行存储元素，所以不会干掉原来的0x18

这里需要从底层分析,假设，parent和children1,children2对应的内存地址分别为：0X13 和 0X18、0X19
那么调用add方法的时候，map<E,list<E>>添加元素的时候 Key是放在数组里的，而list放在node结点里;
如果children1或者children2含有子节点时， 0x18或0x19 也会放到key的数组里。 如果remove掉了0x18，那么必然key的数组里的0x18也就删除了，则丢失了

而链表addall方法，则是底层调用了Arrays。copyof方法，数组扩容，会重新开辟一块空间进行存储元素，所以在brother链表里做remove操作，不会导致树的子节点丢失

这个是栈吗？也没看到有栈的结构在这里呀？但是老师在讲课的时候一直在说栈，

而且他给我们画的不一直是树的遍历？怎么画栈的内存图？

还是不太理解这个为啥是这样打印的，第一行递归的时候不是应该到4那里停止了吗？

此时的当前结点不是在4吗？再执行第三行的递归，其中结点值为4的右节点不是为空吗？

怎么返回的？

老师，为什么在运行的时候加上空的配置文件就会在后台启动呀，这是mongodb的设置还是说对linux系统是这样的，因为之前redis也是指定了配置文件后就可以后台启动

14:30前十几秒，为什么说last是2222，prev传进来也是2222？没弄明白

from urllib.request import urlopen,Request
from urllib.parse import quote
def get_html(url):
    headers={
        "User-Agent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/92.0.4515.131 Safari/537.36 Edg/92.0.902.67"
    }
    request=Request(url,headers=headers)
    response=urlopen(request)
    return response.read().decode()
def save_html(html,filename):
    with open(filename,'w',encoding='utf-8') as f:
        f.write(html)

def main():
    content = input("请输入要获取的贴吧:")
    num = int(input("请输入要获取的页:"))

    for i in range(num):
        url="https://tieba.baidu.com/f?kw=' + quote(content) + '&ie=utf-8&pn={}".format(i*50)
        print(url)
        html=get_html(url)
        filename = '第' + str(i + 1) + '页.html'
        save_html(html,filename)
    # url = "https://tieba.baidu.com/f?kw=%E5%B0%9A%E5%AD%A6%E5%A0%82&ie=utf-8&pn=50"
    # html = get_html(url)
    # save_html(html)
    # url = "https://tieba.baidu.com/f?kw=%E5%B0%9A%E5%AD%A6%E5%A0%82&ie=utf-8&pn=100"
    # html = get_html(url)
    # save_html(html)

if __name__ == '__main__':
    main()
    
    
 老师，请问一下这个运行出来就只有下面那一行成功了，后面就报错是怎么回事儿呀?麻烦老师帮我看一下

那传的是这样的参数的话的话  那不和全局变量一样了吗?

老师我想问一下  我把 user.jsp文件直接放在了web的子目录test文件下 是不是不能通过浏览器直接访问 需要用servlet 跳转访问? 如果可以直接访问又该怎末设置呢

直接访问会报404 错误

import pygame
import random
import time

screen_width = 700
screen_height = 500
bg_cloro = pygame.Color(0,0,255)
COLOR_RED = pygame.Color(255,0,0)

# 主类
class MainGame:
    window = None
    my_tank = None
    def __init__(self):
        pass
    # 开始游戏
    def startGame(self):
        # 初始化窗口
        pygame.display.init()
        # 创建一个窗口
        MainGame.window = pygame.display.set_mode([screen_width,screen_height])
        # 初始化我方坦克
        MainGame.my_tank = MyTank(340,240)
        # 建立一个标题
        pygame.display.set_caption('坦克大战')
        while True:
            # 给窗口添加颜色
            MainGame.window.fill(bg_cloro)
            # 调用方法
            self.getEvent()
            # 绘制文字
            MainGame.window.blit(self.getTextSuface('敌方坦克剩余数量%d'%5),(10,10))
            # 调用坦克显示的方法
            MainGame.my_tank.displayTank()
            # 更新窗口
            pygame.display.update()
            # 每循环依次休息0.02秒
            time.sleep(0.02)
    # 结束游戏
    def endGame(self):
        print("谢谢使用，欢迎再次使用")
        # 结束整个程序
        exit()

    def getTextSuface(self,text):
        # 初始化字体
        pygame.font.init()
        # 获取字体font对象
        font=pygame.font.SysFont("kaiti",18)
        # 绘制文字信息
        textSurface=font.render(text,True,COLOR_RED)
        return textSurface
    # 获取事件的方法
    def getEvent(self):
        # 将获取的所有事件放到eventList列表里面
        eventList = pygame.event.get()
        for event in eventList:
            if event.type == pygame.QUIT:
                self.endGame()
            if event.type == pygame.KEYDOWN:
                if event.key == pygame.K_UP:
                    MainGame.my_tank.direction='U'
                    MainGame.my_tank.move()
                    print("上")
                elif event.key == pygame.K_DOWN:
                    MainGame.my_tank.direction = 'D'
                    MainGame.my_tank.move()
                    print("下")
                elif event.key == pygame.K_LEFT:
                    MainGame.my_tank.direction = 'L'
                    MainGame.my_tank.move()
                    print("左")
                elif event.key == pygame.K_RIGHT:
                    MainGame.my_tank.direction = 'R'
                    MainGame.my_tank.move()
                    print("右")

# 坦克类
class Tank:
    def __init__(self):
        pass
    # 移动方法
    def move(self):
        # 判断坦克方向的移动
        if self.direction=='U':
            self.rect.top-=self.speed
        elif self.direction=='D':
            self.rect.top+=self.speed
        elif self.direction=='L':
            self.rect.left-=self.speed
        elif self.direction=='R':
            self.rect.left+=self.speed
    # 发射子弹的方法
    def shot(self):
        pass
    # 显示坦克的方法
    def displayTank(self):
        # 获取展示的对象
        #self.image=self.images[self.direction]
        # 调用blit方法展示
        MainGame.window.blit(self.image,self.rect)

# 我方坦克类
class MyTank(Tank):
    def __init__(self,left,top):
        # 保存加载的图片
        self.images={
            'U':pygame.image.load('img/p1tankU.gif'),
            'D':pygame.image.load('img/p1tankD.gif'),
            'L':pygame.image.load('img/p1tankL.gif'),
            'R':pygame.image.load('img/p1tankR.gif'),
        }
        # 方向
        self.direction = 'L'
        #根据当前图片的方向获取图片 surface
        self.image=self.images[self.direction]
        #根据图片获取区域
        self.rect=self.image.get_rect()
        #设置区域的left 和top
        self.rect.left=left
        self.rect.top=top
        # 速度，决定移动的快慢
        self.speed=10

# 敌方坦克类
class Enemy(Tank):
    def __init__(self):
        pass

# 子弹类
class Bullet:
    def __init__(self):
        pass
    # 移动的方法
    def bulletMove(self):
        pass
    # 显示子弹的方法
    def displayBullet(self):
        pass

# 墙壁类
class Wall:
    def __init__(self):
        pass
    # 显示墙壁的方法
    def displayWall(self):
        pass

# 爆炸效果类
class Explode:
    def __init__(self):
        pass
    # 展示爆炸效果的方法
    def displayExplode(self):
        pass

# 音乐类
class Music:
    def __init__(self):
        pass
    # 播放音乐
    def playMusic(self):
        pass

if __name__ == "__main__":
    MainGame().startGame()

我的坦克上下左右移动都没问题，但是不能切换方向（就是不换图片，方向一直朝左），不知道为什么