在制作启动器时发现解析出来的库文件总是比HMCL解析出来的多,想知道哪些库是可以忽略的

你可能把给forge用的库也解析到原版了，因此给了你一种出来了太多库的错觉。
解析出来的库里有没有scala？

不，是原版1.12.2的，我比HMCL多解析了2个库
.minecraft\libraries\org\lwjgl\lwjgl\lwjgl\2.9.2-nightly-20140822\lwjgl-2.9.2-nightly-20140822.jar;
.minecraft\libraries\org\lwjgl\lwjgl\lwjgl_util\2.9.2-nightly-20140822\lwjgl_util-2.9.2-nightly-20140822.jar;
少解析了
.minecraft\libraries\com\mojang\text2speech\1.10.3\text2speech-1.10.3.jar;
我过滤的规则是判断是否有"extract"成员

这不是很正常吗，lwjgl是MC的基础啊。

这是HMCL解析的:
F:\game\M inecraft\.minecraft\libraries\com\mojang\patchy\1.1\patchy-1.1.jar;
F:\game\M inecraft\.minecraft\libraries\oshi-project\oshi-core\1.1\oshi-core-1.1.jar;
F:\game\M inecraft\.minecraft\libraries\net\java\dev\jna\jna\4.4.0\jna-4.4.0.jar;
F:\game\M inecraft\.minecraft\libraries\net\java\dev\jna\platform\3.4.0\platform-3.4.0.jar;
F:\game\M inecraft\.minecraft\libraries\com\ibm\icu\icu4j-core-mojang\51.2\icu4j-core-mojang-51.2.jar;
F:\game\M inecraft\.minecraft\libraries\net\sf\jopt-simple\jopt-simple\5.0.3\jopt-simple-5.0.3.jar;
F:\game\M inecraft\.minecraft\libraries\com\paulscode\codecjorbis\20101023\codecjorbis-20101023.jar;
F:\game\M inecraft\.minecraft\libraries\com\paulscode\codecwav\20101023\codecwav-20101023.jar;
F:\game\M inecraft\.minecraft\libraries\com\paulscode\libraryjavasound\20101123\libraryjavasound-20101123.jar;
F:\game\M inecraft\.minecraft\libraries\com\paulscode\librarylwjglopenal\20100824\librarylwjglopenal-20100824.jar;
F:\game\M inecraft\.minecraft\libraries\com\paulscode\soundsystem\20120107\soundsystem-20120107.jar;
F:\game\M inecraft\.minecraft\libraries\io\netty\netty-all\4.1.9.Final\netty-all-4.1.9.Final.jar;
F:\game\M inecraft\.minecraft\libraries\com\google\guava\guava\21.0\guava-21.0.jar;
F:\game\M inecraft\.minecraft\libraries\org\apache\commons\commons-lang3\3.5\commons-lang3-3.5.jar;
F:\game\M inecraft\.minecraft\libraries\commons-io\commons-io\2.5\commons-io-2.5.jar;
F:\game\M inecraft\.minecraft\libraries\commons-codec\commons-codec\1.10\commons-codec-1.10.jar;
F:\game\M inecraft\.minecraft\libraries\net\java\jinput\jinput\2.0.5\jinput-2.0.5.jar;
F:\game\M inecraft\.minecraft\libraries\net\java\jutils\jutils\1.0.0\jutils-1.0.0.jar;
F:\game\M inecraft\.minecraft\libraries\com\google\code\gson\gson\2.8.0\gson-2.8.0.jar;
F:\game\M inecraft\.minecraft\libraries\com\mojang\authlib\1.5.25\authlib-1.5.25.jar;
F:\game\M inecraft\.minecraft\libraries\com\mojang\realms\1.10.22\realms-1.10.22.jar;
F:\game\M inecraft\.minecraft\libraries\org\apache\commons\commons-compress\1.8.1\commons-compress-1.8.1.jar;
F:\game\M inecraft\.minecraft\libraries\org\apache\httpcomponents\httpclient\4.3.3\httpclient-4.3.3.jar;
F:\game\M inecraft\.minecraft\libraries\commons-logging\commons-logging\1.1.3\commons-logging-1.1.3.jar;
F:\game\M inecraft\.minecraft\libraries\org\apache\httpcomponents\httpcore\4.3.2\httpcore-4.3.2.jar;
F:\game\M inecraft\.minecraft\libraries\it\unimi\dsi\fastutil\7.1.0\fastutil-7.1.0.jar;
F:\game\M inecraft\.minecraft\libraries\org\apache\logging\log4j\log4j-api\2.8.1\log4j-api-2.8.1.jar;
F:\game\M inecraft\.minecraft\libraries\org\apache\logging\log4j\log4j-core\2.8.1\log4j-core-2.8.1.jar;
F:\game\M inecraft\.minecraft\libraries\org\lwjgl\lwjgl\lwjgl\2.9.4-nightly-20150209\lwjgl-2.9.4-nightly-20150209.jar;
F:\game\M inecraft\.minecraft\libraries\org\lwjgl\lwjgl\lwjgl_util\2.9.4-nightly-20150209\lwjgl_util-2.9.4-nightly-20150209.jar;
F:\game\M inecraft\.minecraft\libraries\com\mojang\text2speech\1.10.3\text2speech-1.10.3.jar;
F:\game\M inecraft\.minecraft\versions\1.12.2\1.12.2.jar
这是我解析的
F:\game\M inecraft\.minecraft\libraries\com\mojang\patchy\1.1\patchy-1.1.jar;
F:\game\M inecraft\.minecraft\libraries\oshi-project\oshi-core\1.1\oshi-core-1.1.jar;
F:\game\M inecraft\.minecraft\libraries\net\java\dev\jna\jna\4.4.0\jna-4.4.0.jar;
F:\game\M inecraft\.minecraft\libraries\net\java\dev\jna\platform\3.4.0\platform-3.4.0.jar;
F:\game\M inecraft\.minecraft\libraries\com\ibm\icu\icu4j-core-mojang\51.2\icu4j-core-mojang-51.2.jar;
F:\game\M inecraft\.minecraft\libraries\net\sf\jopt-simple\jopt-simple\5.0.3\jopt-simple-5.0.3.jar;
F:\game\M inecraft\.minecraft\libraries\com\paulscode\codecjorbis\20101023\codecjorbis-20101023.jar;
F:\game\M inecraft\.minecraft\libraries\com\paulscode\codecwav\20101023\codecwav-20101023.jar;
F:\game\M inecraft\.minecraft\libraries\com\paulscode\libraryjavasound\20101123\libraryjavasound-20101123.jar;
F:\game\M inecraft\.minecraft\libraries\com\paulscode\librarylwjglopenal\20100824\librarylwjglopenal-20100824.jar;
F:\game\M inecraft\.minecraft\libraries\com\paulscode\soundsystem\20120107\soundsystem-20120107.jar;
F:\game\M inecraft\.minecraft\libraries\io\netty\netty-all\4.1.9.Final\netty-all-4.1.9.Final.jar;
F:\game\M inecraft\.minecraft\libraries\com\google\guava\guava\21.0\guava-21.0.jar;
F:\game\M inecraft\.minecraft\libraries\org\apache\commons\commons-lang3\3.5\commons-lang3-3.5.jar;
F:\game\M inecraft\.minecraft\libraries\commons-io\commons-io\2.5\commons-io-2.5.jar;
F:\game\M inecraft\.minecraft\libraries\commons-codec\commons-codec\1.10\commons-codec-1.10.jar;
F:\game\M inecraft\.minecraft\libraries\net\java\jinput\jinput\2.0.5\jinput-2.0.5.jar;
F:\game\M inecraft\.minecraft\libraries\net\java\jutils\jutils\1.0.0\jutils-1.0.0.jar;
F:\game\M inecraft\.minecraft\libraries\com\google\code\gson\gson\2.8.0\gson-2.8.0.jar;
F:\game\M inecraft\.minecraft\libraries\com\mojang\authlib\1.5.25\authlib-1.5.25.jar;
F:\game\M inecraft\.minecraft\libraries\com\mojang\realms\1.10.22\realms-1.10.22.jar;
F:\game\M inecraft\.minecraft\libraries\org\apache\commons\commons-compress\1.8.1\commons-compress-1.8.1.jar;
F:\game\M inecraft\.minecraft\libraries\org\apache\httpcomponents\httpclient\4.3.3\httpclient-4.3.3.jar;
F:\game\M inecraft\.minecraft\libraries\commons-logging\commons-logging\1.1.3\commons-logging-1.1.3.jar;
F:\game\M inecraft\.minecraft\libraries\org\apache\httpcomponents\httpcore\4.3.2\httpcore-4.3.2.jar;
F:\game\M inecraft\.minecraft\libraries\it\unimi\dsi\fastutil\7.1.0\fastutil-7.1.0.jar;
F:\game\M inecraft\.minecraft\libraries\org\apache\logging\log4j\log4j-api\2.8.1\log4j-api-2.8.1.jar;
F:\game\M inecraft\.minecraft\libraries\org\apache\logging\log4j\log4j-core\2.8.1\log4j-core-2.8.1.jar;
F:\game\M inecraft\.minecraft\libraries\org\lwjgl\lwjgl\lwjgl\2.9.4-nightly-20150209\lwjgl-2.9.4-nightly-20150209.jar;
F:\game\M inecraft\.minecraft\libraries\org\lwjgl\lwjgl\lwjgl_util\2.9.4-nightly-20150209\lwjgl_util-2.9.4-nightly-20150209.jar;
F:\game\M inecraft\.minecraft\libraries\org\lwjgl\lwjgl\lwjgl\2.9.2-nightly-20140822\lwjgl-2.9.2-nightly-20140822.jar;
F:\game\M inecraft\.minecraft\libraries\org\lwjgl\lwjgl\lwjgl_util\2.9.2-nightly-20140822\lwjgl_util-2.9.2-nightly-20140822.jar;
F:\game\M inecraft\.minecraft\versions\1.12.2\1.12.2.jar问题在倒数2行

解析多了，没多大的事，只要不把natives解析进去启动上面不会有太大问题

[Server thread/ERROR]: Could not load 'plugins/plugin.jar' in folder 'plugins'
org.bukkit.plugin.InvalidDescriptionException: Invalid plugin.yml
        at org.bukkit.plugin.java.JavaPluginLoader.getPluginDescription(JavaPluginLoader.java:152) ~[spigot1.7.10.jar:git-Spigot-1.7.9-R0.2-208-ge0f2e95]
        at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:133) [spigot1.7.10.jar:git-Spigot-1.7.9-R0.2-208-ge0f2e95]
        at org.bukkit.craftbukkit.v1_7_R4.CraftServer.loadPlugins(CraftServer.java:369) [spigot1.7.10.jar:git-Spigot-1.7.9-R0.2-208-ge0f2e95]
        at net.minecraft.server.v1_7_R4.DedicatedServer.init(DedicatedServer.java:152) [spigot1.7.10.jar:git-Spigot-1.7.9-R0.2-208-ge0f2e95]
        at net.minecraft.server.v1_7_R4.MinecraftServer.run(MinecraftServer.java:458) [spigot1.7.10.jar:git-Spigot-1.7.9-R0.2-208-ge0f2e95]
        at net.minecraft.server.v1_7_R4.ThreadServerApplication.run(SourceFile:628) [spigot1.7.10.jar:git-Spigot-1.7.9-R0.2-208-ge0f2e95]
Caused by: java.io.FileNotFoundException: Jar does not contain plugin.yml