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Python入门

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Hadoop 分布式文件系统：HDFS（扩展）

Hadoop 分布式计算框架：Mapreduce（扩展）

AIGC人工智能工具全能班

Stable Diffusion（自选模型）AI绘图

大模型全系列

【AI科普】深入浅出人工智能

【AI理论】提示词工程：高效对话与优化技巧

【职场AI】AI在职场中的高效应用场景

【办公AI】DeepSeek接入办公工具实战

【Python入门】零基础快速掌握Python编程

【Java入门】从零开始学Java：基础到实践

【企业实战】如何在项目中集成智能聊天机器人

【AI社交】在微信中接入DeepSeek打造AI女友

【大模型框架】LangChain 与基于RAG构建医疗问答系统

【AI助手与数据可视化】Assistants 与 Streamlit

【大模型本地部署与微调】训练属于你的Deepseek

【编程探秘】解锁AI智能编程工具奥秘

【图像绘图】走进Midjourney图像AI绘图世界

【模绘解析】洞悉Stable Diffusion（自选模型）AI绘图原理

大厂算法特训班

C++特训班

鸿蒙应用开发

大数据全系列

Hadoop 分布式计算MapReduce和资源管理Yarn

人工智能

人工智能基础-Python科学计算和可视化

深度学习-目标检测YOLO(V8正在更新中)实战

微服务

SpringBoot与MybatisPlus

Spring Cloud Alibaba技术栈

租房网（Spring Cloud最新架构）

软件测试全系列

Java编程基础和Java Web开发基础

7u职场软实力

毕设项目

软考中级

软考初级

ROS2机器人开发

计算机考研408

百战万词考研英语

考研英语7000词汇精讲1（1-1000）

考研英语7000词汇精讲2（1000-2000）

考研英语7000词汇精讲3（2000-3000）

考研英语7000词汇精讲4（3000-4000）

考研英语7000词汇精讲5（4000-5000）

考研英语7000词汇精讲6（5000-6000）

考研英语7000词汇精讲7（6000以上）

英文原版报刊选题：《经济学人》选题

英文原版报刊选题：《纽约时报》选题

英文原版报刊选题：《自然nature》选题

英文原版报刊选题：《时代周刊times》选题

英文原版教材：《柏拉图：理想国，西方哲学源头》

考研英语

考研政治

会员可以在此提问，百战程序员老师有问必答

对大家有帮助的问答会被标记为“推荐”
看完课程过来浏览一下别人提的问题，会帮你学得更全面

截止目前，同学们一共提了 132413个问题

时间排序推荐排序

怎么将Vscode中的内容显示在Chrome浏览器？我打开的是默认的edge浏览器

JAVA 全系列/第四阶段：网页编程和设计/HTML5 17386楼

老师好，会员系统对其他模块，比如iaas模块和common模块做了些修改，代码能不能也一起发一下

微服务/第十八阶段：数字货币交易所项目（Spring Cloud Alibaba架构）/服务中台_会员系统的开发 17387楼

就是这样的问题,不清楚怎么样操作了，还是说文件路径的问题

Python 全系列/第三阶段：Python 网络与并发编程/并发编程 17388楼

老师，日志是干什么用的，没有这个log4j或者logback会是怎么样

JAVA 全系列/第八阶段：SpringBoot与MybatisPlus/Spring Boot旧 17389楼

最后一条如果没写resultType写的是resultMap呢

JAVA 全系列/第六阶段：项目管理与SSM框架/Mybatis 17390楼

（1）短路运算符如果左边操作数不能确定该逻辑表达式的值，那么会继续计算右边操作数吗？

（2）短路与如果两个都是正确的，是不是最终打印结果为正确呢？

JAVA 全系列/第一阶段：JAVA 快速入门/变量、数据类型、运算符 17391楼

老师我这个在网页里怎么点都没有动静，代码也检查了，您能帮忙看一下吗？

<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		
		
		<link rel="stylesheet" type="text/css" href="css/reset.css"/>
		
		<link rel="stylesheet" type="text/css" href="css/jd.css"/>
		
		<link rel="stylesheet" type="text/css" href="icon/download/font_hzwf3orp98r/iconfont.css"/>
		
		<script type="text/javascript"  src="js/jd.js"></script>
	</head>
	<body>
		
		<!--导航开始-->
		<div class="nav">
			
			<div class="warp">
				<ul class="nav_ul1">
					
					<li><a href=""><i class="iconfont">&#xe620;</i>京东首页</a></li>
					<li><a href="">配送到：北京</a></li>
					
				</ul>
				
				<ul class="nav_ul2">
					<li><a href="">洋洋宝贝</a><span>|</span></li>
					<li><a href="">我的订单</a><span>|</span></li>
					<li><a href="">我的京东</a><span>|</span></li>
					<li><a href="">京东会员</a><span>|</span></li>
					<li><a href="">企业采购</a><span>|</span></li>
					<li><a href="">京东手机</a><span>|</span></li>
					<li><a href="">关注京东</a><span>|</span></li>
					<li><a href="">客户服务</a><span>|</span></li>
					<li><a href="">网站导航</a></li>
				</ul>
				
			</div>
	
		</div>
		
	
		<!--导航结束-->
		
		<!--搜素框开始-->
		<div class="search">
			
			<div class="warp">
				
				<img src="img/logo1.jpg"/>
				
				<div class="search_div">
					<input type="text" class="search_text"/>
					
					<input type="button" value="搜索" class="search_but"/>
					
				</div>
				
			</div>
			
		</div>
		
		<!--搜索框结束-->
		
		<!--标题开始-->
		<div class="title warp">
			
			<h3>全部商品</h3>
			<div>
				<span>配送至：</span>
				
				<select>
					
					<option>昌平区</option>
					<option>海淀区</option>
					<option>顺义区</option>
					<option>大兴区</option>
				</select>
			</div>			
			
			
		</div>
		
		<!--标题结束-->
		
		<!--显示菜单开始-->
		<div class="tips warp">
			
			<ul>
				<li>
					<input type="checkbox" name="fav" id="all" onclick="checkTest1(this),checkTest2()"/>
					全选
				</li>
				<li>商品</li>
				<li>单价</li>
				<li>数量</li>
				<li>小计</li>
				<li>操作</li>
			</ul>
			
		</div>
		
		
		<!--显示菜单结束-->
		
		<!--商品详情展示开始-->
		<div class="info warp">
			<ul>
				<li class="info_1"><input type="checkbox" name="fav" onclick="checkTest2()"/></li>
				<li class="info_2"><img src="img/img1.jpg" width="70px"/></li>
				<li class="info_3">父与子的编程之旅 与小卡特一起学Python 第3版（全彩印刷）</li>
				<li class="info_4">99.70</li>
				<li class="info_5">
					<button onclick="checkTest3(this,1),checkTest2()">-</button>
					<input type="text" value="1"/>
					<button  onclick="checkTest3(this,2),checkTest2()">+</button>
				</li>
				<li class="info_6">￥99.70</li>
				<li class="info_7">
					<a href="javascript:viod(0)" onclick="checkTest4(this),checkTest2()">删除</a> <br/>
					<a>移到我的关注</a><br/>
				</li>
			</ul>
		</div>
		
		<div class="info warp">
			<ul>
				<li class="info_1"><input type="checkbox" name="fav" onclick="checkTest2()"/></li>
				<li class="info_2"><img src="img/img1.jpg" width="70px"/></li>
				<li class="info_3">父与子的编程之旅 与小卡特一起学Python 第3版（全彩印刷）</li>
				<li class="info_4">99.70</li>
				<li class="info_5">
					<button onclick="checkTest3(this,1),heckTest2()">-</button>
					<input type="text" value="1"/>
					<button  onclick="checkTest3(this,2),checkTest2()">+</button>
				</li>
				<li class="info_6">￥99.70</li>
				<li class="info_7">
					<a href="javascript:viod(0)" onclick="checkTest4(this),checkTest2()">删除</a> <br/>
					<a>移到我的关注</a><br/>
				</li>
			</ul>
		</div>
		
		
		<div class="info warp">
			<ul>
				<li class="info_1"><input type="checkbox" name="fav" onclick="checkTest2()"/></li>
				<li class="info_2"><img src="img/img1.jpg" width="70px"/></li>
				<li class="info_3">父与子的编程之旅 与小卡特一起学Python 第3版（全彩印刷）</li>
				<li class="info_4">99.70</li>
				<li class="info_5">
					<button onclick="checkTest3(this,1),checkTest2()">-</button>
					<input type="text" value="1"/>
					<button  onclick="checkTest3(this,2),checkTest2()">+</button>
				</li>
				<li class="info_6">￥99.70</li>
				<li class="info_7">
					<a href="javascript:viod(0)" onclick="checkTest4(this),checkTest2()">删除</a> <br/>
					<a>移到我的关注</a><br/>
				</li>
			</ul>
		</div>
		<!--商品详情展示结束-->
		
		<!--结算模块开始-->
		<div class="balance warp">
			
			<ul class="balance_ul1">
				<li>
					<input type="checkbox"  name="fav" onclick="checkTest1(this),checkTest2()"/>
					全选
				</li>
				<li><a>删除选中商品</a></li>
				<li><a>移到我的关注</a></li>
				<li><a>清除下柜商品</a></li>
			</ul>
			
			
			<ul class="balance_ul2">
				<li>已经选择<span id="snum">0</span>件商品</li>
				<li>总价<span id="zongz">￥0</span></li>
				<li>
					<button class="butt">去结算</button>
				</li>
			</ul>
			
		</div>
		
		
		<!--结算模块结束-->
		
	</body>
</html>

//获得所有的多选框对象
	
var fav=document.getElementsByName("fav");

//判断是否全选的操作
function checkTest1(th){
	
	var flag=th.checked;
	
	for(var i in fav){
			
		fav[i].checked=flag;
	}	
}


//单选决定全选操作
function checkTest2(){

	var flag=true;
	
	for (var i=1;i<fav.length-1;i++){
		
		if(!fav[i].checked){
			
			flag=false;
			
			break;
		}
		
	}
	//决定框是否勾选
	fav[0].checked=flag;
	fav[fav.length-1].checked=flag;
	
	
	//商品的总价格
	var  zong=0;
	
	//统计是否有勾选的对象
    var num=0;
    
    //统计商品数量
    var spNum=0;
	
	for (var i=1;i<fav.length-1;i++){
		
		if(fav[i].checked){
			
			num++;
			
			//获得父节点
			var par=fav[i].parentNode.parentNode;
			//获得指定ul下面的所有的li
			var li=par.getElementsByTagName("li");
			
			//单个商品的总价格
			var z=li[6].innerText.split("￥")[1];
			
			//获得所有商品的总价格
			zong+=Number(z);
			document.getElementById("zongz").innerText=zong;
			
			//获得商品的数量
            var z2=li[5].getElementsByTagName("input");
            var num2=z2[0].value;
            spNum+=Number(num2);
			
			  
            //获得商品数量统计的对象
            document.getElementById("snum").innerText=spNum;
		}
	}
	if(num==0){
        document.getElementById("zongz").innerText=0;
        document.getElementById("snum").innerText=0；
    }

}

//控制数量的增加和减少
function checkTest3(th,sig){
	
	var pre;
	
	if (sig=="1"){
		//获得下一个节点
		pre=th.nextElementSibling;
		
		if(Number(pre.value)>0){
			//获得节点的value值
			pre.value=Number(pre.value)-1;
		}
	}else{
		//获得上一个节点对象
		pre=th.previousElementSibling;
		//获得节点的value
		pre.value=Number(pre.value)+1;
	}
	//获得每一个商品的单价
	var val=pre.parentNode.previousElementSibling.innerHTML;
	
	//计算每一个商品总的价格
	
	var zong=Number(val)*Number(pre.value);
	
	//把总的价格赋值给我们指定的对象
	
	pre.parentNode.nextElementSibling.innerHTML="￥"+zong;
}

	//删除指定的节点
	function checkTest4(th){
	
	//删除父节点
	
	var div=th.parentNode.parentNode.parentNode;
	
	div.remove();
	
	
}

Python 全系列/第七阶段：网页编程基础/JavaScript 17392楼

老师，dubbo连接服务成功，但是并没有生成provider节点

我看了控制台输出的url 192.168.40.1但是配置的Ip地址不是但是不知道怎么改

JAVA 全系列/第十一阶段：分布式RPC调用和分布式文件存储/Dubbo 17393楼

创建data目录下的myid里面的数字是选举ID吗？

大数据全系列/第四阶段：Zookeeper分布式协调服务框架/ZooKeeper分布式集群实战 17394楼

无法打包图片无法上传

控制台报：

"E:\Program Files\Java\jdk-15.0.2\bin\java.exe" -Dmaven.multiModuleProjectDirectory=D:\java\IdeaProjects\springboot-workpace\springbootlogback -Dmaven.home=C:\Users\danbuliao\.m2\wrapper\dists\apache-maven-3.6.3-bin\1iopthnavndlasol9gbrbg6bf2\apache-maven-3.6.3 -Dclassworlds.conf=C:\Users\danbuliao\.m2\wrapper\dists\apache-maven-3.6.3-bin\1iopthnavndlasol9gbrbg6bf2\apache-maven-3.6.3\bin\m2.conf "-Dmaven.ext.class.path=E:\Program Files\IntelliJ IDEA 2020.2.3\plugins\maven\lib\maven-event-listener.jar" "-javaagent:E:\Program Files\IntelliJ IDEA 2020.2.3\lib\idea_rt.jar=54738:E:\Program Files\IntelliJ IDEA 2020.2.3\bin" -Dfile.encoding=UTF-8 -classpath C:\Users\danbuliao\.m2\wrapper\dists\apache-maven-3.6.3-bin\1iopthnavndlasol9gbrbg6bf2\apache-maven-3.6.3\boot\plexus-classworlds-2.6.0.jar;C:\Users\danbuliao\.m2\wrapper\dists\apache-maven-3.6.3-bin\1iopthnavndlasol9gbrbg6bf2\apache-maven-3.6.3\boot\plexus-classworlds.license org.codehaus.classworlds.Launcher -Didea.version=2020.2.3 install -P jdk-1.8
[INFO] Scanning for projects...
[INFO]
[INFO] ---------------< com.danbuliao:springbootactuatorserver >---------------
[INFO] Building springbootlogback 0.0.1-SNAPSHOT
[INFO] --------------------------------[ jar ]---------------------------------
[INFO]
[INFO] --- maven-resources-plugin:3.1.0:resources (default-resources) @ springbootactuatorserver ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] Copying 2 resources
[INFO] Copying 1 resource
[INFO]
[INFO] --- maven-compiler-plugin:3.8.1:compile (default-compile) @ springbootactuatorserver ---
[INFO] Nothing to compile - all classes are up to date
[INFO]
[INFO] --- maven-resources-plugin:3.1.0:testResources (default-testResources) @ springbootactuatorserver ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] skip non existing resourceDirectory D:\java\IdeaProjects\springboot-workpace\springbootlogback\src\test\resources
[INFO]
[INFO] --- maven-compiler-plugin:3.8.1:testCompile (default-testCompile) @ springbootactuatorserver ---
[INFO] Nothing to compile - all classes are up to date
[INFO]
[INFO] --- maven-surefire-plugin:2.22.2:test (default-test) @ springbootactuatorserver ---
[INFO]
[INFO] -------------------------------------------------------
[INFO] T E S T S
[INFO] -------------------------------------------------------
[INFO] Running com.danbuliao.springbootlogback.SpringbootlogbackApplicationTests
01:32:33,816 |-INFO in ch.qos.logback.classic.LoggerContext[default] - Could NOT find resource [logback-test.xml]
01:32:33,816 |-INFO in ch.qos.logback.classic.LoggerContext[default] - Could NOT find resource [logback.groovy]
01:32:33,817 |-INFO in ch.qos.logback.classic.LoggerContext[default] - Found resource [logback.xml] at [file:/D:/java/IdeaProjects/springboot-workpace/springbootlogback/target/classes/logback.xml]
01:32:33,879 |-INFO in ch.qos.logback.classic.joran.action.ConfigurationAction - debug attribute not set
01:32:33,884 |-INFO in ch.qos.logback.core.joran.action.AppenderAction - About to instantiate appender of type [ch.qos.logback.core.ConsoleAppender]
01:32:33,887 |-INFO in ch.qos.logback.core.joran.action.AppenderAction - Naming appender as [Stdout]
01:32:33,915 |-WARN in ch.qos.logback.core.ConsoleAppender[Stdout] - This appender no longer admits a layout as a sub-component, set an encoder instead.
01:32:33,915 |-WARN in ch.qos.logback.core.ConsoleAppender[Stdout] - To ensure compatibility, wrapping your layout in LayoutWrappingEncoder.
01:32:33,915 |-WARN in ch.qos.logback.core.ConsoleAppender[Stdout] - See also http://logback.qos.ch/codes.html#layoutInsteadOfEncoder for details
01:32:33,915 |-INFO in ch.qos.logback.core.joran.action.AppenderAction - About to instantiate appender of type [ch.qos.logback.core.rolling.RollingFileAppender]
01:32:33,919 |-INFO in ch.qos.logback.core.joran.action.AppenderAction - Naming appender as [RollingFile]
01:32:33,927 |-INFO in c.q.l.core.rolling.TimeBasedRollingPolicy@1208203046 - No compression will be used
01:32:33,928 |-INFO in c.q.l.core.rolling.TimeBasedRollingPolicy@1208203046 - Will use the pattern catalina.base_IS_UNDEFINED/logs//server.%d{yyyy-MM-dd}.log for the active file
01:32:33,930 |-INFO in c.q.l.core.rolling.DefaultTimeBasedFileNamingAndTriggeringPolicy - The date pattern is 'yyyy-MM-dd' from file name pattern 'catalina.base_IS_UNDEFINED/logs//server.%d{yyyy-MM-dd}.log'.
01:32:33,930 |-INFO in c.q.l.core.rolling.DefaultTimeBasedFileNamingAndTriggeringPolicy - Roll-over at midnight.
01:32:33,938 |-INFO in c.q.l.core.rolling.DefaultTimeBasedFileNamingAndTriggeringPolicy - Setting initial period to Sat Feb 20 01:32:33 CST 2021
01:32:33,940 |-WARN in ch.qos.logback.core.rolling.RollingFileAppender[RollingFile] - This appender no longer admits a layout as a sub-component, set an encoder instead.
01:32:33,940 |-WARN in ch.qos.logback.core.rolling.RollingFileAppender[RollingFile] - To ensure compatibility, wrapping your layout in LayoutWrappingEncoder.
01:32:33,940 |-WARN in ch.qos.logback.core.rolling.RollingFileAppender[RollingFile] - See also http://logback.qos.ch/codes.html#layoutInsteadOfEncoder for details
01:32:33,942 |-INFO in ch.qos.logback.core.rolling.RollingFileAppender[RollingFile] - Active log file name: catalina.base_IS_UNDEFINED/logs//server.2021-02-20.log
01:32:33,942 |-INFO in ch.qos.logback.core.rolling.RollingFileAppender[RollingFile] - File property is set to [null]
01:32:33,945 |-INFO in ch.qos.logback.classic.joran.action.RootLoggerAction - Setting level of ROOT logger to INFO
01:32:33,945 |-INFO in ch.qos.logback.core.joran.action.AppenderRefAction - Attaching appender named [Stdout] to Logger[ROOT]
01:32:33,946 |-INFO in ch.qos.logback.core.joran.action.AppenderRefAction - Attaching appender named [RollingFile] to Logger[ROOT]
01:32:33,946 |-INFO in ch.qos.logback.classic.joran.action.ConfigurationAction - End of configuration.
01:32:33,946 |-INFO in ch.qos.logback.classic.joran.JoranConfigurator@ffaa6af - Registering current configuration as safe fallback point

2021-02-20 01:32:34.023 [main] INFO o.s.b.t.context.SpringBootTestContextBootstrapper - Neither @ContextConfiguration nor @ContextHierarchy found for test class [com.danbuliao.springbootlogback.SpringbootlogbackApplicationTests], using SpringBootContextLoader
2021-02-20 01:32:34.032 [main] INFO o.s.test.context.support.AbstractContextLoader - Could not detect default resource locations for test class [com.danbuliao.springbootlogback.SpringbootlogbackApplicationTests]: no resource found for suffixes {-context.xml, Context.groovy}.
2021-02-20 01:32:34.034 [main] INFO o.s.t.c.support.AnnotationConfigContextLoaderUtils - Could not detect default configuration classes for test class [com.danbuliao.springbootlogback.SpringbootlogbackApplicationTests]: SpringbootlogbackApplicationTests does not declare any static, non-private, non-final, nested classes annotated with @Configuration.
2021-02-20 01:32:34.184 [main] INFO o.s.b.t.context.SpringBootTestContextBootstrapper - Found @SpringBootConfiguration com.danbuliao.springbootlogback.SpringbootlogbackApplication for test class com.danbuliao.springbootlogback.SpringbootlogbackApplicationTests
2021-02-20 01:32:34.302 [main] INFO o.s.b.t.context.SpringBootTestContextBootstrapper - Loaded default TestExecutionListener class names from location [META-INF/spring.factories]: [org.springframework.boot.test.mock.mockito.MockitoTestExecutionListener, org.springframework.boot.test.mock.mockito.ResetMocksTestExecutionListener, org.springframework.boot.test.autoconfigure.restdocs.RestDocsTestExecutionListener, org.springframework.boot.test.autoconfigure.web.client.MockRestServiceServerResetTestExecutionListener, org.springframework.boot.test.autoconfigure.web.servlet.MockMvcPrintOnlyOnFailureTestExecutionListener, org.springframework.boot.test.autoconfigure.web.servlet.WebDriverTestExecutionListener, org.springframework.test.context.web.ServletTestExecutionListener, org.springframework.test.context.support.DirtiesContextBeforeModesTestExecutionListener, org.springframework.test.context.support.DependencyInjectionTestExecutionListener, org.springframework.test.context.support.DirtiesContextTestExecutionListener, org.springframework.test.context.transaction.TransactionalTestExecutionListener, org.springframework.test.context.jdbc.SqlScriptsTestExecutionListener, org.springframework.test.context.event.EventPublishingTestExecutionListener]
2021-02-20 01:32:34.321 [main] INFO o.s.b.t.context.SpringBootTestContextBootstrapper - Using TestExecutionListeners: [org.springframework.test.context.web.ServletTestExecutionListener@22ffa91a, org.springframework.test.context.support.DirtiesContextBeforeModesTestExecutionListener@74960bfa, org.springframework.boot.test.mock.mockito.MockitoTestExecutionListener@42721fe, org.springframework.boot.test.autoconfigure.SpringBootDependencyInjectionTestExecutionListener@40844aab, org.springframework.test.context.support.DirtiesContextTestExecutionListener@1f6c9cd8, org.springframework.test.context.event.EventPublishingTestExecutionListener@5b619d14, org.springframework.boot.test.mock.mockito.ResetMocksTestExecutionListener@66746f57, org.springframework.boot.test.autoconfigure.restdocs.RestDocsTestExecutionListener@447a020, org.springframework.boot.test.autoconfigure.web.client.MockRestServiceServerResetTestExecutionListener@7f36662c, org.springframework.boot.test.autoconfigure.web.servlet.MockMvcPrintOnlyOnFailureTestExecutionListener@28e8dde3, org.springframework.boot.test.autoconfigure.web.servlet.WebDriverTestExecutionListener@6d23017e]

.   ____          _            __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot ::        (v2.2.1.RELEASE)

2021-02-20 01:32:34.650 [main] INFO c.d.s.SpringbootlogbackApplicationTests - Starting SpringbootlogbackApplicationTests on DESKTOP-FDC8UPJ with PID 19728 (started by danbuliao in D:\java\IdeaProjects\springboot-workpace\springbootlogback)
2021-02-20 01:32:34.651 [main] INFO c.d.s.SpringbootlogbackApplicationTests - No active profile set, falling back to default profiles: default
2021-02-20 01:32:35.639 [main] WARN o.s.w.context.support.GenericWebApplicationContext - Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'helloController': Injection of autowired dependencies failed; nested exception is java.lang.IllegalArgumentException: Could not resolve placeholder 'msg' in value "${msg}"
2021-02-20 01:32:35.650 [main] INFO o.s.b.a.l.ConditionEvaluationReportLoggingListener -

Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2021-02-20 01:32:35.655 [main] ERROR org.springframework.boot.SpringApplication - Application run failed
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'helloController': Injection of autowired dependencies failed; nested exception is java.lang.IllegalArgumentException: Could not resolve placeholder 'msg' in value "${msg}"
   at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessProperties(AutowiredAnnotationBeanPostProcessor.java:403)
   at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1429)
   at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:594)
   at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:517)
   at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:323)
   at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
   at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:321)
   at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202)
   at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:879)
   at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:878)
   at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:550)
   at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:747)
   at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397)
   at org.springframework.boot.SpringApplication.run(SpringApplication.java:315)
   at org.springframework.boot.test.context.SpringBootContextLoader.loadContext(SpringBootContextLoader.java:125)
   at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContextInternal(DefaultCacheAwareContextLoaderDelegate.java:99)
   at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContext(DefaultCacheAwareContextLoaderDelegate.java:124)
   at org.springframework.test.context.support.DefaultTestContext.getApplicationContext(DefaultTestContext.java:123)
   at org.springframework.test.context.web.ServletTestExecutionListener.setUpRequestContextIfNecessary(ServletTestExecutionListener.java:190)
   at org.springframework.test.context.web.ServletTestExecutionListener.prepareTestInstance(ServletTestExecutionListener.java:132)
   at org.springframework.test.context.TestContextManager.prepareTestInstance(TestContextManager.java:244)
   at org.springframework.test.context.junit.jupiter.SpringExtension.postProcessTestInstance(SpringExtension.java:98)
   at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.lambda$invokeTestInstancePostProcessors$5(ClassBasedTestDescriptor.java:337)
   at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.executeAndMaskThrowable(ClassBasedTestDescriptor.java:342)
   at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.lambda$invokeTestInstancePostProcessors$6(ClassBasedTestDescriptor.java:337)
   at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:195)
   at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177)
   at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1625)
   at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484)
   at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474)
   at java.base/java.util.stream.StreamSpliterators$WrappingSpliterator.forEachRemaining(StreamSpliterators.java:312)
   at java.base/java.util.stream.Streams$ConcatSpliterator.forEachRemaining(Streams.java:735)
   at java.base/java.util.stream.Streams$ConcatSpliterator.forEachRemaining(Streams.java:734)
   at java.base/java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:658)
   at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.invokeTestInstancePostProcessors(ClassBasedTestDescriptor.java:336)
   at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.instantiateAndPostProcessTestInstance(ClassBasedTestDescriptor.java:259)
   at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.lambda$testInstancesProvider$2(ClassBasedTestDescriptor.java:252)
   at java.base/java.util.Optional.orElseGet(Optional.java:362)
   at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.lambda$testInstancesProvider$3(ClassBasedTestDescriptor.java:251)
   at org.junit.jupiter.engine.execution.TestInstancesProvider.getTestInstances(TestInstancesProvider.java:29)
   at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.lambda$prepare$0(TestMethodTestDescriptor.java:106)
   at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
   at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.prepare(TestMethodTestDescriptor.java:105)
   at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.prepare(TestMethodTestDescriptor.java:69)
   at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$prepare$1(NodeTestTask.java:107)
   at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
   at org.junit.platform.engine.support.hierarchical.NodeTestTask.prepare(NodeTestTask.java:107)
   at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:75)
   at java.base/java.util.ArrayList.forEach(ArrayList.java:1511)
   at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:38)
   at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$5(NodeTestTask.java:139)
   at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
   at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$7(NodeTestTask.java:125)
   at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:135)
   at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:123)
   at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
   at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:122)
   at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:80)
   at java.base/java.util.ArrayList.forEach(ArrayList.java:1511)
   at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:38)
   at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$5(NodeTestTask.java:139)
   at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
   at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$7(NodeTestTask.java:125)
   at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:135)
   at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:123)
   at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
   at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:122)
   at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:80)
   at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.submit(SameThreadHierarchicalTestExecutorService.java:32)
   at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.execute(HierarchicalTestExecutor.java:57)
   at org.junit.platform.engine.support.hierarchical.HierarchicalTestEngine.execute(HierarchicalTestEngine.java:51)
   at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:220)
   at org.junit.platform.launcher.core.DefaultLauncher.lambda$execute$6(DefaultLauncher.java:188)
   at org.junit.platform.launcher.core.DefaultLauncher.withInterceptedStreams(DefaultLauncher.java:202)
   at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:181)
   at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:128)
   at org.apache.maven.surefire.junitplatform.JUnitPlatformProvider.invokeAllTests(JUnitPlatformProvider.java:150)
   at org.apache.maven.surefire.junitplatform.JUnitPlatformProvider.invoke(JUnitPlatformProvider.java:124)
   at org.apache.maven.surefire.booter.ForkedBooter.invokeProviderInSameClassLoader(ForkedBooter.java:384)
   at org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:345)
   at org.apache.maven.surefire.booter.ForkedBooter.execute(ForkedBooter.java:126)
   at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:418)
Caused by: java.lang.IllegalArgumentException: Could not resolve placeholder 'msg' in value "${msg}"
   at org.springframework.util.PropertyPlaceholderHelper.parseStringValue(PropertyPlaceholderHelper.java:178)
   at org.springframework.util.PropertyPlaceholderHelper.replacePlaceholders(PropertyPlaceholderHelper.java:124)
   at org.springframework.core.env.AbstractPropertyResolver.doResolvePlaceholders(AbstractPropertyResolver.java:236)
   at org.springframework.core.env.AbstractPropertyResolver.resolveRequiredPlaceholders(AbstractPropertyResolver.java:210)
   at org.springframework.context.support.PropertySourcesPlaceholderConfigurer.lambda$processProperties$0(PropertySourcesPlaceholderConfigurer.java:175)
   at org.springframework.beans.factory.support.AbstractBeanFactory.resolveEmbeddedValue(AbstractBeanFactory.java:908)
   at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1228)
   at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1207)
   at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:636)
   at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:116)
   at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessProperties(AutowiredAnnotationBeanPostProcessor.java:397)
   ... 81 common frames omitted
2021-02-20 01:32:35.659 [main] ERROR o.springframework.test.context.TestContextManager - Caught exception while allowing TestExecutionListener [org.springframework.test.context.web.ServletTestExecutionListener@22ffa91a] to prepare test instance [com.danbuliao.springbootlogback.SpringbootlogbackApplicationTests@72d0f2b4]
java.lang.IllegalStateException: Failed to load ApplicationContext
   at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContext(DefaultCacheAwareContextLoaderDelegate.java:132)
   at org.springframework.test.context.support.DefaultTestContext.getApplicationContext(DefaultTestContext.java:123)
   at org.springframework.test.context.web.ServletTestExecutionListener.setUpRequestContextIfNecessary(ServletTestExecutionListener.java:190)
   at org.springframework.test.context.web.ServletTestExecutionListener.prepareTestInstance(ServletTestExecutionListener.java:132)
   at org.springframework.test.context.TestContextManager.prepareTestInstance(TestContextManager.java:244)
   at org.springframework.test.context.junit.jupiter.SpringExtension.postProcessTestInstance(SpringExtension.java:98)
   at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.lambda$invokeTestInstancePostProcessors$5(ClassBasedTestDescriptor.java:337)
   at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.executeAndMaskThrowable(ClassBasedTestDescriptor.java:342)
   at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.lambda$invokeTestInstancePostProcessors$6(ClassBasedTestDescriptor.java:337)
   at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:195)
   at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177)
   at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1625)
   at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484)
   at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474)
   at java.base/java.util.stream.StreamSpliterators$WrappingSpliterator.forEachRemaining(StreamSpliterators.java:312)
   at java.base/java.util.stream.Streams$ConcatSpliterator.forEachRemaining(Streams.java:735)
   at java.base/java.util.stream.Streams$ConcatSpliterator.forEachRemaining(Streams.java:734)
   at java.base/java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:658)
   at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.invokeTestInstancePostProcessors(ClassBasedTestDescriptor.java:336)
   at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.instantiateAndPostProcessTestInstance(ClassBasedTestDescriptor.java:259)
   at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.lambda$testInstancesProvider$2(ClassBasedTestDescriptor.java:252)
   at java.base/java.util.Optional.orElseGet(Optional.java:362)
   at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.lambda$testInstancesProvider$3(ClassBasedTestDescriptor.java:251)
   at org.junit.jupiter.engine.execution.TestInstancesProvider.getTestInstances(TestInstancesProvider.java:29)
   at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.lambda$prepare$0(TestMethodTestDescriptor.java:106)
   at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
   at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.prepare(TestMethodTestDescriptor.java:105)
   at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.prepare(TestMethodTestDescriptor.java:69)
   at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$prepare$1(NodeTestTask.java:107)
   at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
   at org.junit.platform.engine.support.hierarchical.NodeTestTask.prepare(NodeTestTask.java:107)
   at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:75)
   at java.base/java.util.ArrayList.forEach(ArrayList.java:1511)
   at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:38)
   at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$5(NodeTestTask.java:139)
   at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
   at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$7(NodeTestTask.java:125)
   at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:135)
   at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:123)
   at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
   at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:122)
   at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:80)
   at java.base/java.util.ArrayList.forEach(ArrayList.java:1511)
   at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:38)
   at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$5(NodeTestTask.java:139)
   at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
   at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$7(NodeTestTask.java:125)
   at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:135)
   at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:123)
   at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
   at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:122)
   at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:80)
   at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.submit(SameThreadHierarchicalTestExecutorService.java:32)
   at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.execute(HierarchicalTestExecutor.java:57)
   at org.junit.platform.engine.support.hierarchical.HierarchicalTestEngine.execute(HierarchicalTestEngine.java:51)
   at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:220)
   at org.junit.platform.launcher.core.DefaultLauncher.lambda$execute$6(DefaultLauncher.java:188)
   at org.junit.platform.launcher.core.DefaultLauncher.withInterceptedStreams(DefaultLauncher.java:202)
   at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:181)
   at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:128)
   at org.apache.maven.surefire.junitplatform.JUnitPlatformProvider.invokeAllTests(JUnitPlatformProvider.java:150)
   at org.apache.maven.surefire.junitplatform.JUnitPlatformProvider.invoke(JUnitPlatformProvider.java:124)
   at org.apache.maven.surefire.booter.ForkedBooter.invokeProviderInSameClassLoader(ForkedBooter.java:384)
   at org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:345)
   at org.apache.maven.surefire.booter.ForkedBooter.execute(ForkedBooter.java:126)
   at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:418)
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'helloController': Injection of autowired dependencies failed; nested exception is java.lang.IllegalArgumentException: Could not resolve placeholder 'msg' in value "${msg}"
   at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessProperties(AutowiredAnnotationBeanPostProcessor.java:403)
   at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1429)
   at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:594)
   at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:517)
   at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:323)
   at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
   at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:321)
   at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202)
   at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:879)
   at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:878)
   at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:550)
   at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:747)
   at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397)
   at org.springframework.boot.SpringApplication.run(SpringApplication.java:315)
   at org.springframework.boot.test.context.SpringBootContextLoader.loadContext(SpringBootContextLoader.java:125)
   at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContextInternal(DefaultCacheAwareContextLoaderDelegate.java:99)
   at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContext(DefaultCacheAwareContextLoaderDelegate.java:124)
   ... 65 common frames omitted
Caused by: java.lang.IllegalArgumentException: Could not resolve placeholder 'msg' in value "${msg}"
   at org.springframework.util.PropertyPlaceholderHelper.parseStringValue(PropertyPlaceholderHelper.java:178)
   at org.springframework.util.PropertyPlaceholderHelper.replacePlaceholders(PropertyPlaceholderHelper.java:124)
   at org.springframework.core.env.AbstractPropertyResolver.doResolvePlaceholders(AbstractPropertyResolver.java:236)
   at org.springframework.core.env.AbstractPropertyResolver.resolveRequiredPlaceholders(AbstractPropertyResolver.java:210)
   at org.springframework.context.support.PropertySourcesPlaceholderConfigurer.lambda$processProperties$0(PropertySourcesPlaceholderConfigurer.java:175)
   at org.springframework.beans.factory.support.AbstractBeanFactory.resolveEmbeddedValue(AbstractBeanFactory.java:908)
   at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1228)
   at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1207)
   at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:636)
   at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:116)
   at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessProperties(AutowiredAnnotationBeanPostProcessor.java:397)
   ... 81 common frames omitted
[ERROR] Tests run: 1, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 1.923 s <<< FAILURE! - in com.danbuliao.springbootlogback.SpringbootlogbackApplicationTests
[ERROR] contextLoads Time elapsed: 0.003 s <<< ERROR!
java.lang.IllegalStateException: Failed to load ApplicationContext
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'helloController': Injection of autowired dependencies failed; nested exception is java.lang.IllegalArgumentException: Could not resolve placeholder 'msg' in value "${msg}"
Caused by: java.lang.IllegalArgumentException: Could not resolve placeholder 'msg' in value "${msg}"

[INFO]
[INFO] Results:
[INFO]
[ERROR] Errors:
[ERROR]   SpringbootlogbackApplicationTests.contextLoads » IllegalState Failed to load A...
[INFO]
[ERROR] Tests run: 1, Failures: 0, Errors: 1, Skipped: 0
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 6.612 s
[INFO] Finished at: 2021-02-20T01:32:36+08:00
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-surefire-plugin:2.22.2:test (default-test) on project springbootactuatorserver: There are test failures.
[ERROR]
[ERROR] Please refer to D:\java\IdeaProjects\springboot-workpace\springbootlogback\target\surefire-reports for the individual test results.
[ERROR] Please refer to dump files (if any exist) [date].dump, [date]-jvmRun[N].dump and [date].dumpstream.
[ERROR] -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException

JAVA 全系列/第九阶段：Spring Boot实战/Spring Boot 17395楼

老师，在代码没问题的前提下，视频中7:12那里我点开是这种状态的

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script src="https://cdn.bootcss.com/jquery/3.4.1/jquery.min.js"></script>
</head>
<body>
<script>
    $.ajax({
        type:'get',
        url:'http://localhost:3000/list',
        beforeSend:function(request){
            request.setRequestHeader("Authorization",'iwen');
        },
        success:function (data) {
            console.log(data);
        }
    })
</script>
</body>
</html>

var express=require("express");
var app=express();

app.all("/list",function (req,res,next) {
        //跨域处理
        res.header("Access-Control-Allow-Origin","*");
        res.header("Access-Control-Allow-Headers","Access-Control-Request-Headers:Origin,X-Requested-With,content-Type,Accept,Authorization");
        res.header("Access-Control-Allow-Methods","PUT,POST,GET,DELETE,OPTIONS");
        res.header("X-Powered-By",'3.2.1');
        res.header("Access-Control-Allow-Credentials",true);
        res.header("Content-Type","application/json;charset=utf-8");
        next();
})

app.get("/list",function (req,res) {
        if (req.headers.authorization == 'iwen' ){
          res.send({
            msg:"hello"
        })
        }else{
          res.send({
            msg:'登录超时'
          })
        }
})
app.listen(3000,function () {
        console.log(3000);
})

WEB前端全系列/第十九阶段：Vue2知识体系（旧）/Vue基础知识 17396楼

var timer = null ;

初始化定时器timer，这行代码出现好几次了。

这么写的意义是通用做法吗？还是有特殊意义？为啥是=null ?

WEB前端全系列/第二阶段：JavaScript编程模块/浏览器模型(BOM) 17397楼

为啥3.14=180°，弧度和角度是咋换算的

JAVA 全系列/第一阶段：JAVA 快速入门/IDEA的使用和第一个java项目 17398楼

我通过脚手架工具创建的springbootdemo项目可以吗？

JAVA 全系列/第九阶段：Spring Boot实战/Spring Boot 17399楼

# 查看当前事务自动提交模式
show variables;

/*设置事务提交模式*/
# 关闭
set autocommit = 0;
set autocommit = off;
# 开启
set autocommit = 1;
set autocommit = on;

/*手动开启一个事务,提交或回滚后重置事务模式*/
start transaction;
# 提交事务
commit;
# 事务回滚
rollback;

# 示例
insert into emp3 value (default, '张三', default, default);
commit;

start transaction是手动开启一个事务,不是关闭事务自动提交啊。这个老师没有说清楚

JAVA 全系列/第三阶段：数据库编程/MySQL数据库的使用 17400楼

同学您好