Create the first springboot project. According to the tutorial, it seems that it is the flagship version (this is not sure, anyway, there is only one) with Spring Initializr, and then build it step by step. After watching the tutorial, everyone ran directly, mine The dependency was loaded first, and after a long time, I got confused and stopped loading. (I have used springboot before, so I know that there is an application.java under src [usually there is a name of your project before this file name, anyway, that's what it is], run it, start this project, and I want to start running it)
But there is no Spring Boot in the configuration file, and my pom.xml does not report an error. I didn’t know that it was Maven. I rebuilt it and found that it was a maven problem. I took a look at my maven and it was normal.
I tried this method on the Internet again, and found that it didn’t work, and it was very slow every time it was loaded.
I tried install on the right again, but it didn’t work. At first, the console reported an error or a bunch of garbled characters. Later, I changed the value of the red circle on the left to: -Dfile.encoding=GB2312, no garbled characters, let me download one Heap jar packages and files that I don’t know what they are. I downloaded it and it’s not easy. The log I checked is as follows. According to a statement on the Internet, delete C:\Users\your computer name\.m2 in the c drive. Just delete the file. Although my subsequent mistakes are not the same as theirs, it is really good to do this, and it has troubled me with my problems all afternoon, so I almost quit persuading me, but if we stick to it, we must believe that we can
2021-01-22 16:11:04,490 [1584308] ERROR - #org.jetbrains.idea.maven - Cannot reconnect.
java.lang.RuntimeException: Cannot reconnect.
at org.jetbrains.idea.maven.server.RemoteObjectWrapper.perform(RemoteObjectWrapper.java:82)
at org.jetbrains.idea.maven.server.MavenServerManager.applyProfiles(MavenServerManager.java:531)
at org.jetbrains.idea.maven.project.MavenProjectReader.applyProfiles(MavenProjectReader.java:399)
at org.jetbrains.idea.maven.project.MavenProjectReader.doReadProjectModel(MavenProjectReader.java:108)
at org.jetbrains.idea.maven.project.MavenProjectReader.access$300(MavenProjectReader.java:51)
at org.jetbrains.idea.maven.project.MavenProjectReader$1.doProcessParent(MavenProjectReader.java:453)
at org.jetbrains.idea.maven.project.MavenProjectReader$1.doProcessParent(MavenProjectReader.java:429)
at org.jetbrains.idea.maven.project.MavenParentProjectFileProcessor.processRepositoryParent(MavenParentProjectFileProcessor.java:84)
at org.jetbrains.idea.maven.project.MavenParentProjectFileProcessor.process(MavenParentProjectFileProcessor.java:62)
at org.jetbrains.idea.maven.project.MavenProjectReader.resolveInheritance(MavenProjectReader.java:456)
at org.jetbrains.idea.maven.project.MavenProjectReader.doReadProjectModel(MavenProjectReader.java:105)
at org.jetbrains.idea.maven.project.MavenProjectReader.access$300(MavenProjectReader.java:51)
at org.jetbrains.idea.maven.project.MavenProjectReader$1.doProcessParent(MavenProjectReader.java:453)
at org.jetbrains.idea.maven.project.MavenProjectReader$1.doProcessParent(MavenProjectReader.java:429)
at org.jetbrains.idea.maven.project.MavenParentProjectFileProcessor.processRepositoryParent(MavenParentProjectFileProcessor.java:84)
at org.jetbrains.idea.maven.project.MavenParentProjectFileProcessor.process(MavenParentProjectFileProcessor.java:62)
at org.jetbrains.idea.maven.project.MavenProjectReader.resolveInheritance(MavenProjectReader.java:456)
at org.jetbrains.idea.maven.project.MavenProjectReader.doReadProjectModel(MavenProjectReader.java:105)
at org.jetbrains.idea.maven.project.MavenProjectReader.readProject(MavenProjectReader.java:67)
at org.jetbrains.idea.maven.project.MavenProjectReader.lambda$resolveProject$0(MavenProjectReader.java:531)
at com.intellij.util.containers.ContainerUtilRt.mapNotNull(ContainerUtilRt.java:395)
at com.intellij.util.containers.ContainerUtil.mapNotNull(ContainerUtil.java:1979)
at org.jetbrains.idea.maven.project.MavenProjectReader.resolveProject(MavenProjectReader.java:530)
at org.jetbrains.idea.maven.project.MavenProjectsTree.doResolve(MavenProjectsTree.java:1293)
at org.jetbrains.idea.maven.project.MavenProjectsTree.resolve(MavenProjectsTree.java:1265)
at org.jetbrains.idea.maven.project.MavenProjectsProcessorResolvingTask.perform(MavenProjectsProcessorResolvingTask.java:45)
at org.jetbrains.idea.maven.project.MavenProjectsProcessor.doProcessPendingTasks(MavenProjectsProcessor.java:134)
at org.jetbrains.idea.maven.project.MavenProjectsProcessor.access$000(MavenProjectsProcessor.java:32)
at org.jetbrains.idea.maven.project.MavenProjectsProcessor$2.run(MavenProjectsProcessor.java:109)
at org.jetbrains.idea.maven.utils.MavenUtil.lambda$runInBackground$5(MavenUtil.java:451)
at com.intellij.openapi.application.impl.ApplicationImpl$1.run(ApplicationImpl.java:314)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.rmi.UnmarshalException: Error unmarshaling return header; nested exception is:
java.net.SocketException: Connection reset
at sun.rmi.transport.StreamRemoteCall.executeCall(StreamRemoteCall.java:229)
at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:162)
at java.rmi.server.RemoteObjectInvocationHandler.invokeRemoteMethod(RemoteObjectInvocationHandler.java:227)
at java.rmi.server.RemoteObjectInvocationHandler.invoke(RemoteObjectInvocationHandler.java:179)
at com.sun.proxy.$Proxy132.applyProfiles(Unknown Source)
at sun.reflect.GeneratedMethodAccessor658.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at com.intellij.execution.rmi.RemoteUtil.invokeRemote(RemoteUtil.java:179)
at com.intellij.execution.rmi.RemoteUtil.access$300(RemoteUtil.java:39)
at com.intellij.execution.rmi.RemoteUtil$2$1$1.compute(RemoteUtil.java:160)
at com.intellij.openapi.util.ClassLoaderUtil.runWithClassLoader(ClassLoaderUtil.java:66)
at com.intellij.execution.rmi.RemoteUtil.executeWithClassLoader(RemoteUtil.java:231)
at com.intellij.execution.rmi.RemoteUtil$2$1.invoke(RemoteUtil.java:157)
at com.sun.proxy.$Proxy132.applyProfiles(Unknown Source)
at org.jetbrains.idea.maven.server.MavenServerManager.lambda$applyProfiles$3(MavenServerManager.java:531)
at org.jetbrains.idea.maven.server.RemoteObjectWrapper.perform(RemoteObjectWrapper.java:76)
... 35 more
Caused by: java.net.SocketException: Connection reset
at java.net.SocketInputStream.read(SocketInputStream.java:210)
at java.net.SocketInputStream.read(SocketInputStream.java:141)
at java.io.BufferedInputStream.fill(BufferedInputStream.java:246)
at java.io.BufferedInputStream.read(BufferedInputStream.java:265)
at java.io.DataInputStream.readByte(DataInputStream.java:265)
at sun.rmi.transport.StreamRemoteCall.executeCall(StreamRemoteCall.java:215)
... 51 more
2021-01-22 16:11:04,491 [1584309] ERROR - #org.jetbrains.idea.maven - IntelliJ IDEA 2018.3.2 Build #IU-183.4886.37
2021-01-22 16:11:04,491 [1584309] ERROR - #org.jetbrains.idea.maven - JDK: 1.8.0_152-release; VM: OpenJDK 64-Bit Server VM; Vendor: JetBrains s.r.o
2021-01-22 16:11:04,491 [1584309] ERROR - #org.jetbrains.idea.maven - OS: Windows 10
2021-01-22 16:11:04,507 [1584325] ERROR - #org.jetbrains.idea.maven - Last Action: Maven.ShowSettings