文件名,目录名或卷标语法不正确 - Kotlin - Maven

Question

当我启动打包的jar时出现此错误.当我从IDE运行它时,它不会给出错误并运行.

java.io.FileNotFoundException: file:\C:\Development\Kotlin\AccountTool\target\AccountTool-1.0-SNAPSHOT-jar-with-dependencies.jar!\accounts.json (The filename, directory name or volume label syntax is incorrect)
    at java.io.FileInputStream.open0(Native Method)
    at java.io.FileInputStream.open(Unknown Source)
    at java.io.FileInputStream.<init>(Unknown Source)
    at java.io.FileInputStream.<init>(Unknown Source)
    at java.io.FileReader.<init>(Unknown Source)
    at com.martacus.accounttool.ToolView$handler.readData(Tool.kt:41)
    at com.martacus.accounttool.ToolView.<init>(Tool.kt:56)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
    at java.lang.reflect.Constructor.newInstance(Unknown Source)
    at java.lang.Class.newInstance(Unknown Source)
    at tornadofx.FXKt.find(FX.kt:238)
    at tornadofx.App.start(App.kt:27)
    at com.sun.javafx.application.LauncherImpl.lambda$launchApplication1$159(Unknown Source)
    at com.sun.javafx.application.LauncherImpl$$Lambda$52/31866147.run(Unknown Source)
    at com.sun.javafx.application.PlatformImpl.lambda$runAndWait$172(Unknown Source)
    at com.sun.javafx.application.PlatformImpl$$Lambda$45/2900468.run(Unknown Source)
    at com.sun.javafx.application.PlatformImpl.lambda$null$170(Unknown Source)
    at com.sun.javafx.application.PlatformImpl$$Lambda$48/4210449.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at com.sun.javafx.application.PlatformImpl.lambda$runLater$171(Unknown Source)
    at com.sun.javafx.application.PlatformImpl$$Lambda$47/24077489.run(Unknown Source)
    at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(Unknown Source)
    at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
    at com.sun.glass.ui.win.WinApplication.lambda$null$145(Unknown Source)
    at com.sun.glass.ui.win.WinApplication$$Lambda$36/1828305.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)

ide中的代码和文件层次结构:

fun readData(){
    accounts.clear()
    var readFile = ToolView::class.java.classLoader.getResource("accounts.json").file
    println(readFile)
    FileReader(readFile).use{
        var account = gson.fromJson(it, Array<Account>::class.java) ?: return
        for(i in account){
            accounts.add(i)
        }
    }

}

.jar root:

我不知道出了什么问题,为什么它给我错误.搜索stackoverflow和谷歌没有给我正确的答案.我希望有人可以帮助我,如果您需要更多信息,请说明.

谢谢!

Answer 1

当资源打包到jar中时,它不再作为文件系统中的文件提供.因此,您无法使用标准API来处理文件系统File()或FileReader()访问资源的内容.

相反,您应该使用Class.getResourceAsStream或ClassLoader.getResourceAsStream方法打开资源流并从该流中读取内容:

val stream = ToolView::class.java.classLoader.getResourceAsStream("accounts.json")

stream.reader().use {
    println(it.readText())
}