vite.config.js在哪个文件夹啊

为什么我的无法运行？

这个“\n"为什么不是以字符串的形式加到后面，而是实现换行的功能呢？

请问这个数据库设置商品状态值1,2,3 ，这个123 从前端哪里 对应这个状态，不从数据库中的备注中看

红色圈出部分是不是打错了？

sum+=na+="sxt";sum=sum+na=na+"sxt"

num-=n;mun=mun-n

1. 为什么这里Drawing类里的account能调用Account里的name

2. expenseTotal不需要在def__init__()括号里定义吗

;

;
;
;
;

{
    (,){
        ;
        ;
        {
            .();
            .(,,);
            ;
            .();
            .();
            ..();
        } () {
            .();
        }{
            (){
                {
                    .();
                } () {
                    .();
                }
            }
        }
        (){
            {
                .();
            } () {
                .();
            }
        }
    }
    ([] ) {
        ();
        .(,);
    }
}

报错，

"C:\Program Files\Java\jdk1.8.0_201\bin\java.exe" "-javaagent:D:\program files\JetBrains\IntelliJ IDEA 2019.1\lib\idea_rt.jar=49766:D:\program files\JetBrains\IntelliJ IDEA 2019.1\bin" -Dfile.encoding=UTF-8 -classpath "C:\Program Files\Java\jdk1.8.0_201\jre\lib\charsets.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\deploy.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\ext\access-bridge-64.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\ext\cldrdata.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\ext\dnsns.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\ext\jaccess.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\ext\jfxrt.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\ext\localedata.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\ext\nashorn.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\ext\sunec.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\ext\sunjce_provider.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\ext\sunmscapi.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\ext\sunpkcs11.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\ext\zipfs.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\javaws.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\jce.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\jfr.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\jfxswt.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\jsse.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\management-agent.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\plugin.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\resources.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\rt.jar;D:\workspace\jdbcDemo\out\production\jdbcDemo;D:\workspace\jdbcDemo\lib\mysql-connector-java-5.1.47.jar" com.bjsxt.JdbcTest

Sat Nov 02 21:15:19 CST 2019 WARN: Establishing SSL connection without server's identity verification is not recommended. According to MySQL 5.5.45+, 5.6.26+ and 5.7.6+ requirements SSL connection must be established by default if explicit option isn't set. For compliance with existing applications not using SSL the verifyServerCertificate property is set to 'false'. You need either to explicitly disable SSL by setting useSSL=false, or set useSSL=true and provide truststore for server certificate verification.

java.sql.SQLException: Access denied for user 'root'@'localhost' (using password: YES)

at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:965)

at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3978)

at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3914)

at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:871)

at com.mysql.jdbc.MysqlIO.proceedHandshakeWithPluggableAuthentication(MysqlIO.java:1714)

at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1224)

at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2199)

at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2230)

at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2025)

at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:778)

at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:47)

at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)

at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)

at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)

at java.lang.reflect.Constructor.newInstance(Constructor.java:423)

at com.mysql.jdbc.Util.handleNewInstance(Util.java:425)

at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:386)

at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:330)

at java.sql.DriverManager.getConnection(DriverManager.java:664)

at java.sql.DriverManager.getConnection(DriverManager.java:247)

at com.bjsxt.JdbcTest.insertDepartments(JdbcTest.java:17)

at com.bjsxt.JdbcTest.main(JdbcTest.java:44)

Process finished with exit code 0

老师怎么解决？？？

index_url ='https://www.kuaidaili.com/usercenter/overview'
index_req = Request(index_url,headers =headers)
index_resp = opener.open(index_req)
print(index_resp.read().decode())

请问这里是什么意思，在登录账号后，还发送请求是为啥

老师我把找到问题在哪了///        给老师添麻烦了

headers={"UserAgent":UserAgent().random}里的UserAgent写错了，应该这么写User-Agent。

String s = new String("北京尚学堂");

老师，这个代码里是有两个对象么？一个是new,一个是传入的？

请问一下这个错误是什么意思啊，调试了半天没有用

minlenth属性是谷歌，火狐，ie都取消了它的作用？这三个浏览器中并没有提示长度不够

class Employee:
    def __init__(self, name, age, salary):
        self.name = name
        self.age = age
        self.salary = salary

    @property
    def salary(self):
        print('薪资是:', self.salary)
        return self.salary

    @salary.setter
    def salary(self, salary):
        if 0 < salary <= 1000000:
            self.salary = salary
        else:
            print('请重新输入')

@property装饰器里的salary要是私有的吗，self.__salary就运行就出错

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        body{
            background-color: red;
        }
        @media screen and (max-width=768px) {
            body{
                background-color: red;
            }

           
        }
        @media screen and (mix-width=768px) and (max-width=992px){
            body{
                background-color: green;
            }
        }
        @media screen and (max-width=992px){
            body{
                background-color: indianred;
            }
        }
    </style>
</head>

<body>
   
</body>

</html>

老师，为什么我按照视频中老师的代码写了，改变屏幕宽度背景颜色不会改变呢？