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这有点令人困惑。以下批处理片段导致复制这两个文件:
xcopy "C:\Source\Spaces1 [ ].txt" "C:\Target\" /Y
xcopy "C:\Source\Spaces2 [ ].txt" "C:\Target\" /Y
下面使用流的 Java 片段也会导致复制这两个文件:
public static void main(final String args[]) throws IOException
{
final File source1 = new File("C:\\Source", "Spaces1 [ ].txt");
final File target1 = new File("C:\\Target", "Spaces1 [ ].txt");
fileCopy(source1, target1);
final File source2 = new File("C:\\Source", "Spaces2 [ ].txt");
final File target2 = new File("C:\\Target", "Spaces2 [ ].txt");
fileCopy(source2, target2);
}
public static void fileCopy(final File source, final File target) throws IOException
{
try (InputStream in = new BufferedInputStream(new FileInputStream(source));
OutputStream out = new BufferedOutputStream(new FileOutputStream(target));)
{
final byte[] buf = new byte[4096];
int len;
while (0 < (len = in.read(buf)))
{
out.write(buf, 0, len);
}
out.flush();
}
}
但是，在此代码段中，其中一个文件未被复制(跳过带有双空格的文件):
public static void main(final String args[]) throws Exception
{
final Runtime rt = Runtime.getRuntime();
rt.exec("xcopy \"C:\\Source\\Spaces1 [ ].txt\" \"C:\\Target\\\" /Y").waitFor();
// This file name has two spaces in a row, and is NOT actually copied
rt.exec("xcopy \"C:\\Source\\Spaces2 [ ].txt\" \"C:\\Target\\\" /Y").waitFor();
}
这是怎么回事？这将用于从谁知道什么来源复制文件，人们可以在其中输入他们喜欢的任何内容。文件名已清理，但谁来清理连续的两个空格？我在这里缺少什么？
目前使用 Java 8，但 Java 6 和 7 给出相同的结果。