项目场景：

在IDEA 2019 中集成Springboot 3.1.3 框架，运行异常。

<?xml version="1.0" encoding="UTF-8"?>

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <modules>
    <module>first-dev</module>
  </modules>

  <parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>3.1.3</version>
  </parent>

  <groupId>org.bc</groupId>
  <artifactId>springboot3-dev</artifactId>
  <version>1.0-SNAPSHOT</version>
  <packaging>pom</packaging>
  <name>springboot3-dev</name>
  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
  </properties>

  <dependencies>
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
  </dependencies>




</project>

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问题描述

控制台提示如下：

Error:Internal error: (java.lang.IllegalAccessError) class com.intellij.util.io.FileChannelUtil (in unnamed module @0x12d3a4e9) cannot access class sun.nio.ch.FileChannelImpl (in module java.base) because module java.base does not export sun.nio.ch to unnamed module @0x12d3a4e9
java.lang.IllegalAccessError: class com.intellij.util.io.FileChannelUtil (in unnamed module @0x12d3a4e9) cannot access class sun.nio.ch.FileChannelImpl (in module java.base) because module java.base does not export sun.nio.ch to unnamed module @0x12d3a4e9
    at com.intellij.util.io.FileChannelUtil.setupUnInterruptibleHandle(FileChannelUtil.java:26)
    at com.intellij.util.io.FileChannelUtil.<clinit>(FileChannelUtil.java:18)
    at com.intellij.util.io.ReadWriteDirectBufferWrapper$FileContext$1.execute(ReadWriteDirectBufferWrapper.java:50)
    at com.intellij.util.io.ReadWriteDirectBufferWrapper$FileContext$1.execute(ReadWriteDirectBufferWrapper.java:42)
    at com.intellij.openapi.util.io.FileUtilRt.doIOOperation(FileUtilRt.java:945)
    at com.intellij.util.io.ReadWriteDirectBufferWrapper$FileContext.<init>(ReadWriteDirectBufferWrapper.java:42)
    at com.intellij.util.io.ReadWriteDirectBufferWrapper.create(ReadWriteDirectBufferWrapper.java:27)
    at com.intellij.util.io.DirectBufferWrapper.getBuffer(DirectBufferWrapper.java:24)
    at com.intellij.util.io.ReadWriteDirectBufferWrapper.getBuffer(ReadWriteDirectBufferWrapper.java:16)
    at com.intellij.util.io.PagedFileStorage$StorageLock.createValue(PagedFileStorage.java:631)
    at com.intellij.util.io.PagedFileStorage$StorageLock.get(PagedFileStorage.java:558)
    at com.intellij.util.io.PagedFileStorage$StorageLock.access$500(PagedFileStorage.java:466)
    at com.intellij.util.io.PagedFileStorage.getBufferWrapper(PagedFileStorage.java:407)
    at com.intellij.util.io.PagedFileStorage.getBuffer(PagedFileStorage.java:371)
    at com.intellij.util.io.PagedFileStorage.put(PagedFileStorage.java:278)
    at com.intellij.util.io.PagedFileStorage.fillWithZeros(PagedFileStorage.java:356)
    at com.intellij.util.io.PagedFileStorage.resize(PagedFileStorage.java:330)
    at com.intellij.util.io.ResizeableMappedFile.expand(ResizeableMappedFile.java:108)
    at com.intellij.util.io.ResizeableMappedFile.ensureSize(ResizeableMappedFile.java:77)
    at com.intellij.util.io.ResizeableMappedFile.putInt(ResizeableMappedFile.java:221)
    at com.intellij.util.io.PersistentEnumeratorBase.markDirty(PersistentEnumeratorBase.java:597)
    at com.intellij.util.io.PersistentEnumeratorBase.<init>(PersistentEnumeratorBase.java:185)
    at com.intellij.util.io.PersistentBTreeEnumerator.<init>(PersistentBTreeEnumerator.java:73)
    at com.intellij.util.io.PersistentEnumeratorDelegate.<init>(PersistentEnumeratorDelegate.java:47)
    at com.intellij.util.io.PersistentHashMap.<init>(PersistentHashMap.java:149)
    at com.intellij.util.io.PersistentHashMap.<init>(PersistentHashMap.java:138)
    at com.intellij.util.io.PersistentHashMap.<init>(PersistentHashMap.java:129)
    at com.intellij.util.io.PersistentHashMap.<init>(PersistentHashMap.java:121)
    at com.intellij.util.io.PersistentHashMap.<init>(PersistentHashMap.java:114)
    at org.jetbrains.jps.incremental.storage.AbstractStateStorage.createMap(AbstractStateStorage.java:124)
    at org.jetbrains.jps.incremental.storage.AbstractStateStorage.<init>(AbstractStateStorage.java:27)
    at org.jetbrains.jps.incremental.storage.FileTimestampStorage.<init>(FileTimestampStorage.java:27)
    at org.jetbrains.jps.incremental.storage.ProjectStamps.<init>(ProjectStamps.java:39)
    at org.jetbrains.jps.incremental.storage.ProjectTimestamps.<init>(ProjectTimestamps.java:19)
    at org.jetbrains.jps.cmdline.BuildRunner.load(BuildRunner.java:92)
    at org.jetbrains.jps.cmdline.BuildSession.runBuild(BuildSession.java:274)
    at org.jetbrains.jps.cmdline.BuildSession.run(BuildSession.java:130)
    at org.jetbrains.jps.cmdline.BuildMain$MyMessageHandler.lambda$channelRead0$0(BuildMain.java:232)
    at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
    at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
    at java.base/java.lang.Thread.run(Thread.java:833)

---

原因分析：

intelliJ IDEA 2019 JDK 版本不匹配，Springboot 3.1.3使用的JDK是JDK18，intelliJ IDEA 2019不支持。

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解决方案：

更换IDEA至IDEA 2021直接导入即可。