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现在大概知道了,这件事卡了我好几天,方法是: java -cp .\forge-install-bootstrapper.jar;forge-1.12.2-14.23.5.2860-installer.jar com.bangbang93.ForgeInstaller “c:\ndmdl\Release 2.2.9.minecraft”(.minecraft目录) 这个可以安装forge