SpringBoot项目修改JDK后报错(class file version 55.0)

项目中更换JDK，由jdk9换到jdk11

报错信息

java.lang.UnsupportedClassVersionError: org/zjh/openlayersdemo/OpenlayersdemoApplication has been compiled by a more recent version of the Java Runtime (class file version 55.0), this version of the Java Runtime only recognizes class file versions up to 52.0at java.lang.ClassLoader.defineClass1(Native Method)at java.lang.ClassLoader.defineClass(ClassLoader.java:763)at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)at java.net.URLClassLoader.defineClass(URLClassLoader.java:467)at java.net.URLClassLoader.access$100(URLClassLoader.java:73)at java.net.URLClassLoader$1.run(URLClassLoader.java:368)at java.net.URLClassLoader$1.run(URLClassLoader.java:362)at java.security.AccessController.doPrivileged(Native Method)at java.net.URLClassLoader.findClass(URLClassLoader.java:361)at java.lang.ClassLoader.loadClass(ClassLoader.java:424)at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:335)at java.lang.ClassLoader.loadClass(ClassLoader.java:357)at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:495)
Error: A JNI error has occurred, please check your installation and try again
Exception in thread "main"

【原因】jdk不匹配

注：如果配置都已修改依旧报错，发现启动时还是以前的JDK，如下入，可以直接跳到最后

【解决方式】

1.pom修改11

    <properties><java.version>11</java.version></properties>

2.修改配置
ctrl + alt + shfit + s打开设置
选择SDKs
添加新的JDK

选择Modules

选择Project

最后，启动时配置

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