通常，当java返回“参数不正确"时，这是什么意思? [英] Typically, what does it mean when java returns a "The parameter is incorrect"

问题描述

我正在创建一个像这样的文件

I am creating a file like so

try {
    File file = new File(workingDir, obj.getName() + ".xls");
    outputStream = new FileOutputStream(file);
} catch (FileNotFoundException ex) {
    ex.printStackTrace();
}

我得到

java.io.FileNotFoundException: ..\a\relative\path\obj_name.xls (The parameter is incorrect)
    at java.io.FileOutputStream.open(Native Method)
    at java.io.FileOutputStream.<init>(Unknown Source)
    at java.io.FileOutputStream.<init>(Unknown Source)

参数不正确"是什么意思?我验证的路径名存在；它不应该只是创建文件名吗?这是在Windows机器上.在基于UNIX的系统上，代码可以正常工作而不会出现此错误.

What does "the parameter is incorrect" mean? The pathname I validated exists; shouldn't it just create the file name? This is on a windows machine. The code works without this error on unix based systems.

更新

验证输出流正在尝试写入的文件是否存在.还验证了该文件可写.经过大惊小怪之后，我删除了实际路径，只是传入了文件名(不需要)，并且可以正常工作.因此，问题与路径有关.我需要对路径中的字符进行转义吗?

Verified that the file exists that the output stream is attempting to write to. Also verified that the file is writable. After much fussing, I removed the actual path and just passed in the file name (not desired) and that works. So the issue has something to do with the path. Do I need to escape the characters in the path?

推荐答案

这看起来像是在正常情况下，类似路径中带有冒号(:)且未引用驱动器号的情况都会引起此消息.

Under normal situations, something like a path that has a colon (:) in it which does not refer to a drive letter would cause this message.

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