Uncaught exception in thread "main"
java.lang.RuntimeException: An exception occurred when launching the server!
        at net.fabricmc.loader.impl.launch.server.FabricServerLauncher.main(FabricServerLauncher.java:71)
        at net.fabricmc.installer.ServerLauncher.main(ServerLauncher.java:69)
Caused by: java.lang.RuntimeException: Error invoking MC server bundler: java.lang.UnsupportedClassVersionError: net/minecraft/bundler/Main has been compiled by a more recent version of the Java Runtime (class file version 61.0), this version of the Java Runtime only recognizes class file versions up to 55.0
        at net.fabricmc.loader.impl.game.minecraft.BundlerProcessor.process(BundlerProcessor.java:102)
        at net.fabricmc.loader.impl.game.minecraft.MinecraftGameProvider.locateGame(MinecraftGameProvider.java:190)
        at net.fabricmc.loader.impl.launch.knot.Knot.createGameProvider(Knot.java:177)
        at net.fabricmc.loader.impl.launch.knot.Knot.init(Knot.java:130)
        at net.fabricmc.loader.impl.launch.knot.Knot.launch(Knot.java:68)
        at net.fabricmc.loader.impl.launch.knot.KnotServer.main(KnotServer.java:23)
        at net.fabricmc.loader.impl.launch.server.FabricServerLauncher.main(FabricServerLauncher.java:69)
        ... 1 more
Caused by: java.lang.UnsupportedClassVersionError: net/minecraft/bundler/Main has been compiled by a more recent version of the Java Runtime (class file version 61.0), this version of the Java Runtime only recognizes class file versions up to 55.0
        at java.base/java.lang.ClassLoader.defineClass1(Native Method)
        at java.base/java.lang.ClassLoader.defineClass(ClassLoader.java:1017)
        at java.base/java.lang.ClassLoader.defineClass(ClassLoader.java:878)
        at net.fabricmc.loader.impl.game.minecraft.BundlerProcessor$1.loadClass(BundlerProcessor.java:65)
        at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:522)
        at java.base/java.lang.Class.forName0(Native Method)
        at java.base/java.lang.Class.forName(Class.java:398)
        at net.fabricmc.loader.impl.game.minecraft.BundlerProcessor.process(BundlerProcessor.java:85)
        ... 7 more

既然你都知道了，就用java17啊

高版本服务区需要使用 Java 17，请检查你的服务器版本和 Java 版本是否匹配。

有java17，但是他依然会出这个报错

有java17                        

找到问题了，java11没删干净，他一直读取java11，不读取17

找到问题了，java11没删干净，他一直读取java11，不读取17