有效沟通问答-【官方】百战程序员_IT在线教育培训机构

<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
	</head>
	<body>
	<u>北京尚学堂</u>
	<i>北京尚学堂</i>
	<b>北京尚学堂</b>
	<del>北京尚学堂</del>
	2<sup>3</sup>
	log<sub>8</sub>
	<small>北京尚学堂</small>
	<big>北京尚学堂</big>
	<!--字体标签face ：指定字体的风格-->
	<font color="red" size="28px" face="宋体">北京尚学堂<font>
		<span>北京尚学堂<span>
			<br />
	<!--[1]有序标签-->
	<ol type="1">
		<li>javaSE</li>
		<li>javaSE</li>
		<li>javaSE</li>
	</ol>
		
	<!--[2]无序标签-->
	<ul type="square">
		<li>javaSE</li>
		<li>javaSE</li>
		<li>javaSE</li>
	</ul>
		
	<!--[3]自定义标签-->
		<dl>
			<dt>java </dt>
			<dt>java </dt>
			<dt>java </dt>
		</dl>
		<!--跑马灯标签-->
		<marquee direction="right" scrollamount="40px"> 北京尚学堂 </marquee>
			
				
		
		</dl>
			
		
	</body>
</html>

老师为何我怎么改这个有序标签运行出来都是无序的点点哪里解析不对求指导

Python 全系列/第七阶段：网页编程基础/html5 25956楼

在启动start.bat报错:

Java HotSpot(TM) 64-Bit Server VM warning: Ignoring option MaxPermSize; support was removed in 8.0

log4j:WARN No appenders could be found for logger (com.alibaba.dubbo.common.logger.LoggerFactory).

log4j:WARN Please initialize the log4j system properly.

log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'com.alibaba.dubbo.monitor.MonitorService': Instantiation of bean failed; nested exception is java.lang.ExceptionInInitializerError

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:883)

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:839)

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:440)

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory$1.run(AbstractAutowireCapableBeanFactory.java:409)

at java.base/java.security.AccessController.doPrivileged(AccessController.java:391)

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:380)

at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:264)

at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)

at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:261)

at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:185)

at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:164)

at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeansOfType(DefaultListableBeanFactory.java:308)

at org.springframework.context.support.AbstractApplicationContext.getBeansOfType(AbstractApplicationContext.java:947)

at org.springframework.context.support.AbstractApplicationContext.registerListeners(AbstractApplicationContext.java:701)

at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:377)

at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:139)

at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:93)

at com.alibaba.dubbo.container.spring.SpringContainer.start(SpringContainer.java:50)

at com.alibaba.dubbo.container.Main.main(Main.java:80)

Caused by: java.lang.ExceptionInInitializerError

at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)

at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)

at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)

at java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:500)

at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:481)

at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:100)

at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:61)

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:877)

... 18 more

Caused by: java.lang.IllegalStateException: fail to create adaptive instance: java.lang.IllegalStateException: Can not create adaptive extenstion interface com.alibaba.dubbo.rpc.Protocol, cause: java.io.IOException: invalid constant type: 18

at com.alibaba.dubbo.common.extension.ExtensionLoader.getAdaptiveExtension(ExtensionLoader.java:459)

at com.alibaba.dubbo.config.ServiceConfig.<clinit>(ServiceConfig.java:60)

... 26 more

Caused by: java.lang.IllegalStateException: Can not create adaptive extenstion interface com.alibaba.dubbo.rpc.Protocol, cause: java.io.IOException: invalid constant type: 18

at com.alibaba.dubbo.common.extension.ExtensionLoader.createAdaptiveExtension(ExtensionLoader.java:723)

at com.alibaba.dubbo.common.extension.ExtensionLoader.getAdaptiveExtension(ExtensionLoader.java:455)

... 27 more

Caused by: java.lang.RuntimeException: java.io.IOException: invalid constant type: 18

at javassist.CtClassType.getClassFile2(CtClassType.java:204)

at javassist.CtClassType.subtypeOf(CtClassType.java:304)

at javassist.compiler.MemberResolver.compareSignature(MemberResolver.java:248)

at javassist.compiler.MemberResolver.lookupMethod(MemberResolver.java:120)

at javassist.compiler.MemberResolver.lookupMethod(MemberResolver.java:97)

at javassist.compiler.MemberCodeGen.atMethodCallCore(MemberCodeGen.java:562)

at javassist.compiler.MemberCodeGen.atCallExpr(MemberCodeGen.java:524)

at javassist.compiler.JvstCodeGen.atCallExpr(JvstCodeGen.java:244)

at javassist.compiler.ast.CallExpr.accept(CallExpr.java:46)

at javassist.compiler.MemberCodeGen.atCallExpr(MemberCodeGen.java:497)

at javassist.compiler.JvstCodeGen.atCallExpr(JvstCodeGen.java:244)

at javassist.compiler.ast.CallExpr.accept(CallExpr.java:46)

at javassist.compiler.MemberCodeGen.atCallExpr(MemberCodeGen.java:497)

at javassist.compiler.JvstCodeGen.atCallExpr(JvstCodeGen.java:244)

at javassist.compiler.ast.CallExpr.accept(CallExpr.java:46)

at javassist.compiler.MemberCodeGen.atCallExpr(MemberCodeGen.java:497)

at javassist.compiler.JvstCodeGen.atCallExpr(JvstCodeGen.java:244)

at javassist.compiler.ast.CallExpr.accept(CallExpr.java:46)

at javassist.compiler.CodeGen.atBinExpr(CodeGen.java:964)

at javassist.compiler.ast.BinExpr.accept(BinExpr.java:41)

at javassist.compiler.JvstCodeGen.atMethodArgs(JvstCodeGen.java:358)

at javassist.compiler.MemberCodeGen.atMethodCallCore(MemberCodeGen.java:556)

at javassist.compiler.MemberCodeGen.atNewExpr(MemberCodeGen.java:302)

at javassist.compiler.ast.NewExpr.accept(NewExpr.java:73)

at javassist.compiler.CodeGen.compileExpr(CodeGen.java:230)

at javassist.compiler.CodeGen.atThrowStmnt(CodeGen.java:628)

at javassist.compiler.CodeGen.atStmnt(CodeGen.java:365)

at javassist.compiler.ast.Stmnt.accept(Stmnt.java:50)

at javassist.compiler.CodeGen.atIfStmnt(CodeGen.java:391)

at javassist.compiler.CodeGen.atStmnt(CodeGen.java:355)

at javassist.compiler.ast.Stmnt.accept(Stmnt.java:50)

at javassist.compiler.CodeGen.atStmnt(CodeGen.java:351)

at javassist.compiler.ast.Stmnt.accept(Stmnt.java:50)

at javassist.compiler.CodeGen.atMethodBody(CodeGen.java:292)

at javassist.compiler.CodeGen.atMethodDecl(CodeGen.java:274)

at javassist.compiler.ast.MethodDecl.accept(MethodDecl.java:44)

at javassist.compiler.Javac.compileMethod(Javac.java:169)

at javassist.compiler.Javac.compile(Javac.java:95)

at javassist.CtNewMethod.make(CtNewMethod.java:74)

at javassist.CtNewMethod.make(CtNewMethod.java:45)

at com.alibaba.dubbo.common.compiler.support.JavassistCompiler.doCompile(JavassistCompiler.java:119)

at com.alibaba.dubbo.common.compiler.support.AbstractCompiler.compile(AbstractCompiler.java:59)

at com.alibaba.dubbo.common.compiler.support.AdaptiveCompiler.compile(AdaptiveCompiler.java:46)

at com.alibaba.dubbo.common.extension.ExtensionLoader.createAdaptiveExtensionClass(ExtensionLoader.java:739)

at com.alibaba.dubbo.common.extension.ExtensionLoader.getAdaptiveExtensionClass(ExtensionLoader.java:732)

at com.alibaba.dubbo.common.extension.ExtensionLoader.createAdaptiveExtension(ExtensionLoader.java:721)

... 28 more

Caused by: java.io.IOException: invalid constant type: 18

at javassist.bytecode.ConstPool.readOne(ConstPool.java:1113)

at javassist.bytecode.ConstPool.read(ConstPool.java:1056)

at javassist.bytecode.ConstPool.<init>(ConstPool.java:150)

at javassist.bytecode.ClassFile.read(ClassFile.java:765)

at javassist.bytecode.ClassFile.<init>(ClassFile.java:109)

at javassist.CtClassType.getClassFile2(CtClassType.java:191)

... 73 more

请按任意键继续. . .

JAVA 全系列/第十一阶段：分布式RPC调用和分布式文件存储/Dubbo 25957楼

复制出来的图片文件是空的可能是什么问题呢？
前面几个实验复制都成功了

下面文件路径我有小小遮下

package com.bjsxt;

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.FileInputStream;
import java.io.FileOutputStream;

public class FileStreamBuffer3Demo {
    public static void main(String[] args) {
        FileInputStream fis = null;
        FileOutputStream fos  = null;
        BufferedInputStream bis = null;
        BufferedOutputStream bos = null;
        try {
            fis = new FileInputStream("/Users/.../Documents/...jpg");
            bis = new BufferedInputStream(fis);
            fos = new FileOutputStream("/Users/.../Documents/...jpg");
            bos = new BufferedOutputStream(fos);
            int temp = 0;
            while((temp = bis.read()) != -1){
                bos.write(temp);
            }
            bos.flush();

        }catch (Exception e ){
            e.printStackTrace();
        }finally {
            try {

            }catch (Exception e){
                e.printStackTrace();
            }
        }

    }
}

JAVA 全系列/第二阶段：JAVA 基础深化和提高/IO 流技术（旧） 25958楼

老师，绑定类bind的前面不应该是root吗？为什么是b1呢

Python 全系列/第二阶段：Python 深入与提高/GUI编程（隐藏） 25959楼

老师，就是那个制作动图的软件怎么下载啊，我下载不上啊

JAVA 全系列/第一阶段：JAVA 快速入门/数组和数据存储 25960楼

<template slot-scope="scope">
          <el-button
            size="mini"
            type="danger"
            @click="handleDelete(scope.$index, scope.row)"
          >
            删除
          </el-button>
        </template>

handleDelete(index, row) {
      // console.log(index, row);
      api
        .deleteItemById({
          id: row.id,
        })
        .then((res) => {
          this.$confirm("此操作将永久删除该文件, 是否继续?", "提示", {
            confirmButtonText: "确定",
            cancelButtonText: "取消",
            type: "warning",
          })
            .then(() => {
              if (res.data.status === 200) {
                this.$message({
                  type: "success",
                  message: "删除成功!",
                });
                //视图重绘
                this.http(1);
              } else {
                this.$message({
                  type: "error",
                  message: "删除失败!",
                });
              }
            })
            .catch(() => {
              this.$message({
                type: "info",
                message: "已取消删除",
              });
            });
        })
        .catch((error) => {
          console.log(error);
        });
    },

老师，这个视频里面从8分50秒开始的部分：视频中的删除功能引用了element组件库中的MessageBox弹窗提示，上面是视频中讲课老师编写的代码。但是我发现按照这样顺序写下来的话并没有起到在删除数据前多做一次判断的作用，不管点击确定还是取消，后台数据其实都已经删除了。

WEB前端全系列/第二十阶段：Vue2企业级项目（旧）/易购商品后台管理系统 25961楼

JAVA 全系列/第六阶段：项目管理与SSM框架/Mybatis 25962楼

老师做完这个项目可以把之前得知识都串起来嘛。找工作方面可以写进简历吗？

JAVA 全系列/第十八阶段：亿级高并发电商项目_架构/编码（旧）/电商：基于SpringSecurity实现后台登录功能 25963楼

老师，如果是一个二维Object数组，怎么把他转为对象数组或对象集合呢。

package com.bjsxt.test.container;

import org.junit.Test;

import java.util.ArrayList;

import java.util.Arrays;
import java.util.List;

public class TestArrayList {

    @Test
    public void test() {
        Object[][] objects = new Object[2][];
        Object [] object1 = new Object[3];
        object1[0] = 001;
        object1[1] = "张三";
        object1[2] =15;

        Object [] object2 = new Object[3];
        object2[0] = 002;
        object2[1] = "张一";
        object2[2] =18;
        objects[0] = object1;
        objects[1] = object2;

        List<Object[]> list = Arrays.asList(objects);  
    
        People[] peoples = list.toArray(new People[list.size()]);  //报错了java.lang.ArrayStoreException
    }
}

class People{
    public Integer id;
    public String name;
    public Integer age;
}

这种情况只能循环List<Object[]> list 然后把每一个Object[ ]的值取出来赋给People 存起来吗

JAVA 全系列/第二阶段：JAVA 基础深化和提高/容器（旧） 25964楼

<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<script src="js/jquery-1.9.1.js" type="text/javascript" charset="utf-8"></script>
		<script type="text/javascript">
			$(function(){
				//1.type属性等于text
				//$("input[type=text]").css("background-color","red")
				
				//2.name属性用z开头的
				$("input name^=z").css("background-color","pink")
				
				//3.name属性是d结尾的
				$("input[name&d]").css("background-color","red")
			})
		</script>
	</head>
	<body>
		<center>
		<h3>注册页面</h3>
		<hr />
		<form action="" method="get" onsubmit="return zong()">
		<table border="1px">
			<tr height="35px">
				<td width="150px">用户名：</td>
				<td width="400px">
					<input type="text" name="zuname" id="uname" value="" alt="用户名" "/>
				    <span id="uname_span">*用户名必须是3-5位的汉字</span>
				</td>
			</tr>
			<tr height="35px">
				<td>密码：</td>
				<td>
					<input type="password" name="zpwd" id="pwd" value="" alt="密码"/>
					<span id="pwd_span"></span>
					
				</td>
			</tr>
			<tr height="35px">
				<td>手机号：</td>
				<td>
					<input type="text" name="zphone" id="phone" value="" alt="手机号" />
					<span id="phone_span"></span>
				</td>
			</tr>
			<tr height="35px">
				<td>邮箱：</td>
				<td>
					<input type="text" name="email" id="email" value="" alt="邮箱" />
				    <span id="email_span"></span>
				</td>
			</tr>
			<tr height="35px">
				<td>颜色：</td>
				<td>
					<input type="color" name="scolor" id=""  />
				</td>
			</tr>
			<tr height="35px">
				<td>爱好：</td>
				<td>
					<input type="checkbox" name="fav" id="" value="1" />唱歌
					<input type="checkbox" name="fav" id="" value="2" />睡觉
					<input type="checkbox" name="fav" id="" value="3"  />LOL<br />
					<input type="checkbox" name="fav" id="" value="4"  />旅游
					<input type="checkbox" name="fav" id="" value="5" />高尔夫
					<input type="checkbox" name="fav" id="" value="6" />篮球
					
				</td>
			</tr>
			<tr height="35px">
				<td>籍贯：</td>
				<td>
					<select name="adress" id="sel" onchange="checkAdress()">
						<option value="0">--请选择--</option>
						<option value="1">河南</option>
						<option value="2">湖南</option>
						<option value="3">海南</option>
						<option value="4">云南</option>
					</select>
					
					<span id="sel_span"></span>
				</td>
			</tr>
			
			<tr height="35px">
				<td>验证码</td>
				<td>
					<input type="number" name="" id="yzm" value=""/>
					<span id="yzm_span"></span>
					<span id="yzm2_span"></span>
				</td>
			</tr>
			
			<tr height="35px">
				<td>个人介绍：</td>
				<td>
					<textarea name="intro" rows="8" cols="30"></textarea>
				</td>
			</tr>
			
			<tr height="35px">
				<td colspan="2" align="center">
					<input type="checkbox" name="" id="check" value="">是否同一本公司协议
				</td>
			</tr>
			<tr height="35px">
				<td colspan="2" align="center">
					<input type="submit" id="sub" value="注册" disabled="true"/>
				</td>
			</tr>
		</table>
		</form>
		</center>
		
		
	</body>
</html>

这两个怎么不执行了？

                                //2.name属性用z开头的
				$("input name^=z").css("background-color","pink")
				
				//3.name属性是d结尾的
				$("input[name&d]").css("background-color","red")

JAVA 全系列/第四阶段：网页编程和设计/Jquery（旧） 25965楼

同学您好