java.lang.UnsupportedClassVersionError eclipse中使用maven插件的时候,运行run as maven build的时候报错 -Dmaven.multiModuleProjectDirectory system propery is not set. Check $M2_HOME environment variable and mvn script match. 可以设一个环境变量M2_HOME指向你的maven安装目录 M2_HOME=D:\Ap…

全局安装vue-cli,使用命令npm install -g vue-cli. 下载模板代码,使用命令vue init webpack my-project,之后会有一些询问,按需填写即可. 最后会看到生成了一个叫my-project的文件夹,里面就是vue-cli脚手架搭建出来的目录. 这时要进入my-project,然后使用命令npm install去安装package.json里配置的各种东西. 最后使用命令npm run dev启动热加载,就会去自动化执行package.json里的 "…

Could not calculate build plan: Plugin org.apache.maven.plugins:maven-war-plugin:2.2 or one of its dependencies could not be resolved: Failed to read artifact descriptor for org.apache.maven.plugins:maven-war-plugin:jar:2.2 Plugin org.apache.maven.pl…

首先,我们看到观察这个错误:Failure to transfer org.apache.maven.plugins,这种错误是项目部署时,maven所关联的仓库中插件的设置出错了. 所以我们需要找到这个插件,将插件删除,然后更新项目即可. 操作步骤如下: 1.找到maven相关联的仓库,也就是下载的插件所存放的位置.如果你没有在maven根目录下的conf——>settings.xml文件中进行maven仓库配置,则默认仓库位置是C:\User\.m2\repository,如果配置过repo…

Description Resource Path Location Type The superclass "javax.servlet.http.HttpServlet" was not found on the Java Build Path index.jsp /ssm-crud/WebRoot line 1 JSP Problem 解决办法如下所示: 在add Library时,没有server runtime,就是用MyEclipse server library 然后ne…

<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-tomcat</artifactId> <!--<scope>provided</scope>--> </dependency> 在pom文件中将scope注释再加上 <dependency> <group…

今天用IDEA建立maven项目时报错: [INFO] Scanning for projects... [INFO] Searching repository for plugin with prefix: 'archetype'. [INFO] ------------------------------------------------------------------------ [ERROR] BUILD ERROR [INFO] -------------------------…

问题描述: 使用Eclipse自带的Maven插件创建Web项目时报错: Could not resolve archetype org.apache.maven.archetypes:maven-archetype-webapp:RELEASE from any of the configured repositories. Could not resolve artifact org.apache.maven.archetypes:maven-archetype-webapp:pom:REL…

近日使用myeclipse 部署web项目,启动tomcat时报错: SEVERE: Error waiting for multi-thread deployment of directories to completehostConfig.deployWar=Deploying web application archive {0} java.util.concurrent.ExecutionException: java.lang.OutOfMemoryError: Java heap s…

myeclipse 启动tomcat时报错:Cannot change deployment state from ERROR to REDEPLOYING.ds - 刘琦的专栏 - 博客频道 - CSDN.NET http://blog.csdn.net/u012922219/article/details/42869361   错误 : 无改将部署状态从"错误"变成"重新部署"状态. 解决办法: 右击"项目名" –> MyEclipse…