如题
.____          .__  .__  _________
|    |    ____ |  | |__|/   _____/ ______________  __ ___________
|    |   /  _ \|  | |  |\_____  \_/ __ \_  __ \  \/ // __ \_  __ \
|    |__(  <_> )  |_|  |/        \  ___/|  | \/\   /\  ___/|  | \/
|_______ \____/|____/__/_______  /\___  >__|    \_/  \___  >__|
        \/                     \/     \/                 \/
                             Welcome to LoliServer 1.16.5 ! - LoliServer Developement Group
java.net.UnknownHostException: download.loliidc.cn
        at java.base/sun.nio.ch.NioSocketImpl.connect(NioSocketImpl.java:567)
        at java.base/java.net.Socket.connect(Socket.java:645)
        at java.base/java.net.Socket.connect(Socket.java:595)
        at java.base/sun.net.NetworkClient.doConnect(NetworkClient.java:182)
        at java.base/sun.net.www.http.HttpClient.openServer(HttpClient.java:497)
        at java.base/sun.net.www.http.HttpClient.openServer(HttpClient.java:600)
        at java.base/sun.net.www.http.HttpClient.<init>(HttpClient.java:246)
        at java.base/sun.net.www.http.HttpClient.New(HttpClient.java:351)
        at java.base/sun.net.www.http.HttpClient.New(HttpClient.java:372)
        at java.base/sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1299)
        at java.base/sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1232)
        at java.base/sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1120)
        at java.base/sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:1051)
        at moe.loliidc.util.UpdateChecker.checkUpdate(UpdateChecker.java:27)
        at moe.loliserver.LoliServerStart.main(LoliServerStart.java:50)
        at net.minecraftforge.server.ServerMain.main(ServerMain.java:40)
[19:33:06] [main/INFO]: ModLauncher running: args [--gameDir, ., --launchTarget, fmlserver, --fml.forgeVersion, 36.1.16, --fml.mcpVersion, 20210115.111550, --fml.mcVersion, 1.16.5, --fml.forgeGroup, net.minecraftforge]
[19:33:06] [main/INFO]: ModLauncher 8.0.9+86+master.3cf110c starting: java version 16.0.1 by Oracle Corporation
Exception in thread "main" java.lang.IllegalAccessError: class cpw.mods.modlauncher.SecureJarHandler (in unnamed module @0x2f4d3709) cannot access class sun.security.util.ManifestEntryVerifier (in module java.base) because module java.base does not export sun.security.util to unnamed module @0x2f4d3709
        at cpw.mods.modlauncher.SecureJarHandler.lambda$static$1(SecureJarHandler.java:41)
        at cpw.mods.modlauncher.api.LamdbaExceptionUtils.uncheck(LamdbaExceptionUtils.java:95)
        at cpw.mods.modlauncher.SecureJarHandler.<clinit>(SecureJarHandler.java:41)
        at cpw.mods.modlauncher.Launcher.lambda$new$6(Launcher.java:55)
        at java.base/java.util.concurrent.ConcurrentHashMap.computeIfAbsent(ConcurrentHashMap.java:1708)
        at cpw.mods.modlauncher.api.TypesafeMap.computeIfAbsent(TypesafeMap.java:52)
        at cpw.mods.modlauncher.api.TypesafeMap.computeIfAbsent(TypesafeMap.java:47)
        at cpw.mods.modlauncher.Environment.computePropertyIfAbsent(Environment.java:62)
        at cpw.mods.modlauncher.Launcher.<init>(Launcher.java:55)
        at cpw.mods.modlauncher.Launcher.main(Launcher.java:66)
        at net.minecraftforge.server.ServerMain$Runner.runLauncher(ServerMain.java:66)
        at net.minecraftforge.server.ServerMain$Runner.access$100(ServerMain.java:63)
        at net.minecraftforge.server.ServerMain.main(ServerMain.java:60)
请按任意键继续. . .

服务端无法启动，下载JDK11 JDK8都无法解决

对于1.16.x的端尝试使用Java8启动

同问,楼主解决了吗？

对于1.16.x的端尝试使用Java8启动