Question

我真的坚持这个错误。这对我没有任何意义。为什么参数类型UnixPath, null？我试图按预期打印tempDir变量 - e.i.具有正确路径的路径对象。

有什么想法吗？

没有方法签名：build_76p6jmah0vklon2l29au5dqlcr $ _copyRecursively_closure3.doCall（）适用于参数类型：（sun.nio.fs.UnixPath，null）值：[generic / bundle，...] 可能的解决方案：doCall（），doCall（java.lang.Object），findAll（），findAll（）

readFile(args[Property.CONFIG_FILE.propertyName]).eachLine {
        if (new File(it).isDirectory()) {
            copyRecursively(Paths.get(it), tempDir)
        } else {
            println "File $it is not a directory. Skipping."
        }
    }


void copyRecursively(Path sourceDir, Path destinationDir) {
    Files.walkFileTree(sourceDir, [FileVisitOption.FOLLOW_LINKS] as Set, Integer.MAX_VALUE, [
            postVisitDirectory: { return FileVisitResult.CONTINUE },
            preVisitDirectory: {filePath, attrs ->
                Path newDirectory = destinationDir.resolve(sourceDir.relativize(filePath));
                Files.copy(filePath, newDirectory, StandardCopyOption.COPY_ATTRIBUTES, StandardCopyOption.REPLACE_EXISTING)
                return FileVisitResult.CONTINUE;
            },
            visitFile: { filePath, attrs ->
                Files.copy(filePath, destinationDir.resolve(sourceDir.relativize(filePath)), StandardCopyOption.COPY_ATTRIBUTES, StandardCopyOption.REPLACE_EXISTING);
                return FileVisitResult.CONTINUE;
            },
            visitFileFailed: { return FileVisitResult.CONTINUE }
    ] as java.nio.file.FileVisitor)
}

Answer 1

您面临的问题是因为FileVisitor对象没有正确构造bean。方法visitFileFailed＆amp; postVisitDirectory期望两个参数，但您没有提供任何参数。解决问题后，copyRecursively的正确方法定义为：

void copyRecursively(Path sourceDir, Path destinationDir) {
    FileVisitor visitor =[
            preVisitDirectory : { Path filePath, BasicFileAttributes attrs ->
                Path newDirectory = destinationDir.resolve(sourceDir.relativize(filePath))
                Files.copy(filePath, newDirectory, StandardCopyOption.COPY_ATTRIBUTES, StandardCopyOption.REPLACE_EXISTING)
                return FileVisitResult.CONTINUE
            },
            visitFile         : { Path filePath, BasicFileAttributes attrs ->
                Files.copy(filePath, destinationDir.resolve(sourceDir.relativize(filePath)), StandardCopyOption.COPY_ATTRIBUTES, StandardCopyOption.REPLACE_EXISTING)
                return FileVisitResult.CONTINUE
            },
            visitFileFailed   : { file, IOException ex -> return FileVisitResult.CONTINUE },
            postVisitDirectory: { dir, IOException ex -> return FileVisitResult.CONTINUE }
    ] as FileVisitor
    Files.walkFileTree(sourceDir, [FileVisitOption.FOLLOW_LINKS] as Set, Integer.MAX_VALUE, visitor)
}

没有方法签名：build_hash $ _copyRecursively_closure3.doCall（）适用于参数类型

1 个答案: