版本IDEA的问题

企业版的IDEA新建servlet文件的选项是哪个

qq_慕神0589333 2021-06-06

源自：慕课OA系统实现 9-2 项目作业

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3回答

好帮手慕小班 2021-06-12 10:48:04

同学你好，1、同学打开如下窗口再看看呐

2、可能由于IDEA的网络安全机制造成的，类似于windows的防火墙，IDEA误认为你的网络不安全，同学可以看看自己有没有如下配置：

打开 Setting--》Appearance & Behavior --》Syetem Setting --》Updates，将Use secure connection 的勾选去掉，如下图所示配置

如上所示，修改后重启idea再试试。

祝学习愉快~

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好帮手慕小脸 2021-06-11 10:25:06

同学你好，

1、找不到Web猜测是同学的idea缺失插件，这里可参考如下步骤下载：

在setting中找到plugins，搜索Servlet这个插件，如果前面对勾没选中，将其选中，并重启idea即可

2、猜测是jar包加载的问题，建议同学点击右侧Maven刷新试一下，如果还是不可以，可尝试将本地仓库中的这个jar删除，然后右键项目，选择Maven--Reimport

祝学习愉快~

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提问者 qq_慕神0589333 #1

插件没有

2021-06-11 22:41:17

好帮手慕小尤 2021-06-07 10:42:38

同学你好，同学是创建New没有Create New Servlet选项是吗？如果是，则建议同学使用下方方式进行检查与配置一下。如下所示：

1、检查pom.xml 文件中有没有相关的依赖，需要在dependencies中添加Tomcat中关于jsp和servlet的jar。如下所示：

如果没有这建议同学添加，然后重新刷新maven进行下载。

<!--servlet-api-->
<dependency>
    <groupId>javax.servlet</groupId>
    <artifactId>javax.servlet-api</artifactId>
    <version>3.1.0</version>
    <!--依赖只参与编译测试,不进行发布-->
    <scope>provided</scope>
</dependency>
<dependency>
    <groupId>javax.servlet.jsp</groupId>
    <artifactId>jsp-api</artifactId>
    <version>2.1</version>
    <scope>provided</scope>
</dependency>

2、如果还是不能Create New Servlet，则建议同学点击 File ->Priject Structure，将Java标记成Sources文件。如下所示：

然后在facets配置中的sources root的，将src勾选上。

最后重新查看是否有Create New Servlet选项。

祝学习愉快！

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提问者 qq_慕神0589333 #1

刷新maven后报错:

java.lang.RuntimeException: Cannot reconnect.
   at org.jetbrains.idea.maven.server.MavenServerConnectorImpl.perform(MavenServerConnectorImpl.java:177)
   at org.jetbrains.idea.maven.server.MavenServerConnector.applyProfiles(MavenServerConnector.java:84)
   at org.jetbrains.idea.maven.project.MavenProjectReader.applyProfiles(MavenProjectReader.java:422)
   at org.jetbrains.idea.maven.project.MavenProjectReader.doReadProjectModel(MavenProjectReader.java:98)
   at org.jetbrains.idea.maven.project.MavenProjectReader.readProject(MavenProjectReader.java:56)
   at org.jetbrains.idea.maven.project.MavenProject.read(MavenProject.java:683)
   at org.jetbrains.idea.maven.project.MavenProjectsTree.doUpdate(MavenProjectsTree.java:549)
   at org.jetbrains.idea.maven.project.MavenProjectsTree.update(MavenProjectsTree.java:459)
   at org.jetbrains.idea.maven.project.MavenProjectsTree.updateAll(MavenProjectsTree.java:427)
   at org.jetbrains.idea.maven.project.MavenProjectsProcessorReadingTask.perform(MavenProjectsProcessorReadingTask.java:61)
   at org.jetbrains.idea.maven.project.MavenProjectsProcessor.doProcessPendingTasks(MavenProjectsProcessor.java:146)
   at org.jetbrains.idea.maven.project.MavenProjectsProcessor$1.run(MavenProjectsProcessor.java:115)
   at org.jetbrains.idea.maven.utils.MavenUtil.lambda$runInBackground$6(MavenUtil.java:536)
   at com.intellij.util.RunnableCallable.call(RunnableCallable.java:20)
   at com.intellij.util.RunnableCallable.call(RunnableCallable.java:11)
   at com.intellij.openapi.application.impl.ApplicationImpl$1.call(ApplicationImpl.java:265)
   at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
   at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
   at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
   at java.base/java.util.concurrent.Executors$PrivilegedThreadFactory$1$1.run(Executors.java:668)
   at java.base/java.util.concurrent.Executors$PrivilegedThreadFactory$1$1.run(Executors.java:665)
   at java.base/java.security.AccessController.doPrivileged(Native Method)
   at java.base/java.util.concurrent.Executors$PrivilegedThreadFactory$1.run(Executors.java:665)
   at java.base/java.lang.Thread.run(Thread.java:834)
Caused by: java.rmi.ConnectException: Connection refused to host: 127.0.0.1; nested exception is:
   java.net.ConnectException: Connection refused: connect
   at java.rmi/sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:623)
   at java.rmi/sun.rmi.transport.tcp.TCPChannel.createConnection(TCPChannel.java:209)
   at java.rmi/sun.rmi.transport.tcp.TCPChannel.newConnection(TCPChannel.java:196)
   at java.rmi/sun.rmi.server.UnicastRef.invoke(UnicastRef.java:132)
   at java.rmi/java.rmi.server.RemoteObjectInvocationHandler.invokeRemoteMethod(RemoteObjectInvocationHandler.java:217)
   at java.rmi/java.rmi.server.RemoteObjectInvocationHandler.invoke(RemoteObjectInvocationHandler.java:162)
   at com.sun.proxy.$Proxy159.applyProfiles(Unknown Source)
   at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
   at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
   at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
   at java.base/java.lang.reflect.Method.invoke(Method.java:566)
   at com.intellij.execution.rmi.RemoteUtil.invokeRemote(RemoteUtil.java:150)
   at com.intellij.execution.rmi.RemoteUtil.access$400(RemoteUtil.java:21)
   at com.intellij.execution.rmi.RemoteUtil$1.lambda$invoke$0(RemoteUtil.java:134)
   at com.intellij.openapi.util.ClassLoaderUtil.computeWithClassLoader(ClassLoaderUtil.java:31)
   at com.intellij.execution.rmi.RemoteUtil.executeWithClassLoader(RemoteUtil.java:202)
   at com.intellij.execution.rmi.RemoteUtil$1.invoke(RemoteUtil.java:134)
   at com.sun.proxy.$Proxy159.applyProfiles(Unknown Source)
   at org.jetbrains.idea.maven.server.MavenServerConnector.lambda$applyProfiles$3(MavenServerConnector.java:85)
   at org.jetbrains.idea.maven.server.MavenServerConnectorImpl.perform(MavenServerConnectorImpl.java:169)
   ... 23 more
Caused by: java.net.ConnectException: Connection refused: connect
   at java.base/java.net.PlainSocketImpl.connect0(Native Method)
   at java.base/java.net.PlainSocketImpl.socketConnect(PlainSocketImpl.java:101)
   at java.base/java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:399)
   at java.base/java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:242)
   at java.base/java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:224)
   at java.base/java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
   at java.base/java.net.Socket.connect(Socket.java:609)
   at java.base/java.net.Socket.connect(Socket.java:558)
   at java.base/java.net.Socket.<init>(Socket.java:454)
   at java.base/java.net.Socket.<init>(Socket.java:231)
   at com.intellij.execution.rmi.RemoteServer$1.createSocket(RemoteServer.java:174)
   at java.rmi/sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:617)
   ... 42 more

在标记resource文件时:

2021-06-08 00:25:04
好帮手慕小尤回复提问者 qq_慕神0589333 #2

同学你好，1、建议同学找到本地仓库，然后将其删除，重新下载是试一下。如下所示：
2、此问题可能是jdk版本不一致导致的，则建议同学修改jdk版本。如下所示：
然后重新标记resource试一下。
祝学习愉快！

2021-06-08 10:16:30
提问者 qq_慕神0589333 回复好帮手慕小尤 #3

删除整个maven文件夹吗？还是直接重新载入？
望老师详细演示下

2021-06-08 18:41:18