注释写的第三个参数是回调函数，可实际是new DownloadByteArray()

我们要配置的那个CLASS_PATH中，；%java_home%\lib那这个，；%分别是什么意思？

老师，我想请问在div嵌套中，我设置外部盒子由内部盒子内容撑开，然后把内部盒子设为行内块元素，为什么没有实现封口的效果呢？

如果我用嵌套来设计一个相框，可以这么设计吗

什么样的请求为get请求？什么样的请求为post请求

public class TestDeadLock {
    public static void main(String[] args) {
        MakeUp mu1 = new MakeUp(0,"小丫");
        mu1.start();

        MakeUp mu2 = new MakeUp(1,"大丫");
        mu2.start();
    }
}

/**
 * 口红类
 */
class Lipstick{

}

/**
 * 镜子类
 */
class Mirror{

}

class MakeUp extends Thread{

    private int flag; //flag = 0:手上有口红 flag != 0:手上有镜子
    private String name;
    static Lipstick lipstick = new Lipstick();
    static Mirror mirror = new Mirror();

    public MakeUp(int flag, String name) {
        this.flag = flag;
        this.name = name;
    }

    public MakeUp() {
    }

    @Override
    public void run() {
        this.doMakeUp();
    }

    /**
     * 开始化妆
     */
    public void doMakeUp(){
        if (this.flag == 0){
            synchronized (lipstick){
                System.out.println(this.name+" 拿着口红");
                try {
                    Thread.sleep(1000);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
                synchronized (mirror){
                    System.out.println(this.name +" 拿着镜子");
                }
            }
        }else {
            synchronized (mirror){
                System.out.println(this.name +" 拿着镜子");
                try {
                    Thread.sleep(2000);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
            synchronized (lipstick){
                System.out.println(this.name +" 拿着口红");
            }
        }
    }
}

我确定是跟着视频里一个一个敲的，但是没有出现死锁情况是怎么回事啊

上一个问题已经解决，postman发送的报文不对，添加一行，然后再访问

为什么一直显示这个问题，应该怎么办？这个问题都好几天了

这里关键的课程啥也看不了啊

pycharm环境下卸载后安装就会提示错误：

PS D:\scrapytest> pip install cryptography==36.0.2

Collecting cryptography==36.0.2

  Using cached cryptography-36.0.2-cp36-abi3-win_amd64.whl (2.2 MB)

Requirement already satisfied: cffi>=1.12 in d:\scrapytest\venv\lib\site-packages (from cryptography==36.0.2) (1.15.1)

Requirement already satisfied: pycparser in d:\scrapytest\venv\lib\site-packages (from cffi>=1.12->cryptography==36.0.2) (2.21)

Installing collected packages: cryptography

ERROR: pip's dependency resolver does not currently take into account all the packages that are installed. This behaviour is the source of the following dependency

 conflicts.

pyopenssl 22.1.0 requires cryptography<39,>=38.0.0, but you have cryptography 36.0.2 which is incompatible.

Successfully installed cryptography-36.0.2

虽然提示完成安装但运行起来提示错误：

Traceback (most recent call last):

  File "D:/scrapytest/webtest/scrapy03/scrapy03/begin_脚本启动scrapy.py", line 10, in <module>

    from scrapy.cmdline import execute

  File "D:\scrapytest\venv\lib\site-packages\scrapy\__init__.py", line 12, in <module>

    from scrapy.spiders import Spider

  File "D:\scrapytest\venv\lib\site-packages\scrapy\spiders\__init__.py", line 93, in <module>

    from scrapy.spiders.crawl import CrawlSpider, Rule

  File "D:\scrapytest\venv\lib\site-packages\scrapy\spiders\crawl.py", line 15, in <module>

    from scrapy.utils.spider import iterate_spider_output

  File "D:\scrapytest\venv\lib\site-packages\scrapy\utils\spider.py", line 5, in <module>

    from scrapy.utils.defer import deferred_from_coro

  File "D:\scrapytest\venv\lib\site-packages\scrapy\utils\defer.py", line 29, in <module>

    from scrapy.utils.reactor import is_asyncio_reactor_installed, get_asyncio_event_loop_policy

  File "D:\scrapytest\venv\lib\site-packages\scrapy\utils\reactor.py", line 5, in <module>

    from twisted.internet import asyncioreactor, error

  File "D:\scrapytest\venv\lib\site-packages\twisted\internet\asyncioreactor.py", line 19, in <module>

    from twisted.internet.posixbase import (

  File "D:\scrapytest\venv\lib\site-packages\twisted\internet\posixbase.py", line 16, in <module>

    from twisted.internet import error, tcp, udp

  File "D:\scrapytest\venv\lib\site-packages\twisted\internet\tcp.py", line 38, in <module>

    from twisted.internet._newtls import (

  File "D:\scrapytest\venv\lib\site-packages\twisted\internet\_newtls.py", line 18, in <module>

    from twisted.protocols.tls import TLSMemoryBIOFactory, TLSMemoryBIOProtocol

  File "D:\scrapytest\venv\lib\site-packages\twisted\protocols\tls.py", line 42, in <module>

    from OpenSSL.SSL import Connection, Error, SysCallError, WantReadError, ZeroReturnError

  File "D:\scrapytest\venv\lib\site-packages\OpenSSL\__init__.py", line 8, in <module>

    from OpenSSL import SSL, crypto

  File "D:\scrapytest\venv\lib\site-packages\OpenSSL\SSL.py", line 19, in <module>

    from OpenSSL.crypto import (

  File "D:\scrapytest\venv\lib\site-packages\OpenSSL\crypto.py", line 3224, in <module>

    utils.deprecated(

TypeError: deprecated() got an unexpected keyword argument 'name'

请问这个该怎么解决？

老师这是什么原因，一提交数据就这样，检查了代码也没看出问题啊

老师，table的width和height百分比是什么效果啊这个百分比参考的是什么值？在视频里没有讲啊。通过代码去运行没有理解

老师，table的width和height百分比是什么效果啊？还有这个百分比参考的是什么值？在视频里没有讲啊。通过代码去运行没有理解

老师您好。

1. $binary_remote_addr就是访问ip

2. 并发限制中需要先配置限流，然后server中是单个ip最大连接和虚拟主机最大处理

3. 白名单当请求的ip若是limit中的ip地址则'value'=0，0也为""空串，即不会限流，反之当对应ip不存在白名单中时得到的value为1，即得到当前IP进行限流