处理方式

将 rt.jar 放入对应位置即可

Failed to execute goal com.github.wvengen:proguard-maven-plugin:2.5.3:proguard (default) on project framework: Can’t copy to temporary libraryJars directory: File system element for parameter ‘source’ does not exist: ‘D:\Program Files\Java\jdk-10.0.1\lib\rt.jar’ -> [Help 1]