如何使用文件路径中的空格从java调用ghostscript [英] How to call ghostscript from java with whitespaces in file paths

问题描述

最近我发现自己不得不在java和windows环境中启动ghostscript命令，在输入/输出文件名中使用空格。命令的一个例子如下：

  gs -q -dNOPAUSE -dBATCH -sDEVICE = pnggray -r300 -sOutputFile = / home / nic / tomcat / 6.0.33 with spaces / temp / Thread-11 / img-％03d.png /home/nic/tomcat/6.0.33 with spaces / temp / tmpfile.tmp 
   
 
 
  gs被取代为gswin32在Windows上，因为ghostscript是在路径。 
 
 
 
我很快意识到我不得不以某种方式逃避文件名，所以我做的第一件事是将它们包含在双引号之间。这在Windows上工作，但不是在linux上：在linux上我已经尝试了双引号，并且使用反斜杠转义了空格，但没有成功。 
 
 
 
要启动命令，我使用 Runtime.getRuntime（）。exec（command）; 单串。我发现以下问题获取ghostscript以其名称中的空格（例如我的文档）中的文件，但是：
 
 
 
 
 
我希望将其扩展为linux; 
 
 
我发现双引号适用于我，与其中指出的不同。
 
 
 
 
 
我想了解这个东西一次：你能帮我做这个吗？
 
 
 
下面是我的总结
 
 
 
 Windows 
 
 
 
以双引号括起文件名为我工作：
  gswin32 -q -dNOPAUSE -dBATCH -sDEVICE = pnggray -r300 -sOutputFile =C：\Program Files\tomcat 6.0.33 with space \temp\Thread-11\img-％03d.pngC：\Program Files\tomcat 6.0.33 with spaces\temp\tmpfile.tmp
  
 
 
 
 Linux 
 
 
 
试图将文件名包含在双引号
  gs -q -dNOPAUSE -dBATCH -sDEVICE = pnggray -r300 -sOutputFile =/ home / nic / tomcat / 6.0.33 with spaces / temp / Thread-11 / img-％03d.png/home/nic/tomcat/6.0.33 with spaces / temp / tmpfile.tmp
  
尝试使用反斜杠转义空格
  gs -q -dNOPAUSE -dBATCH -sDEVICE = pnggray -r300 -sOutputFile = / home / nic / tomcat / 6.0.33\ with\ spaces / temp / Thread-11 / img-％03d.png / home / nic / tomcat /6.0.33\ with\ spaces / temp / tmpfile.tmp 
  
 p> 
 
 
  gs -q -dNOPAUSE -dBATCH -sDEVICE = pnggray -r300 -sOutputFile =/ home / nic / tomcat / 6.0.33\\ \\ with\ spaces / temp / Thread-11 / img-％03d.png/home/nic/tomcat/6.0.33\ with\ spaces / temp / tmpfile.tmp
  
 
 
解决方案
为什么不使用运行时。 exec（String [] args））它需要多个参数？此变体旨在避免您必须逃避此类参数。由于参数是单独提供的，因此不需要基于空格的插值，因此不会有任何混淆。
 
Recently I found myself having to launch the ghostscript command from java, in both linux and windows environments, with whitespaces in input/output filenames. An example of the command follows:
gs -q -dNOPAUSE -dBATCH -sDEVICE=pnggray -r300 -sOutputFile=/home/nic/tomcat/6.0.33 with spaces/temp/Thread-11/img-%03d.png /home/nic/tomcat/6.0.33 with spaces/temp/tmpfile.tmp
The gs gets replaced by gswin32 on windows, given that ghostscript is in the Path.

I quickly realized that I had to escape the file names in some manner, so the first thing I've done was to enclose them between double quotes. This worked on windows, but not on linux: on linux I've tried the double quotes enclosing and also escaping whitespaces with backslashes, but without success. 

For launching the command I'm using Runtime.getRuntime().exec(command);, passing one single string. I found the following question getting ghostscript to take in files with spaces in their name (like something in "my documents") but:


I desired to extend it also for linux;
I found that double quoting works for me, differently than how it's pointed out there.


I would like to understand this thing once per all: can you help me to do this?

Here follows a summary of my attempts, per SO.

Windows

Enclosing file names in double quotes worked for me:
gswin32 -q -dNOPAUSE -dBATCH -sDEVICE=pnggray -r300 -sOutputFile="C:\Program Files\tomcat 6.0.33 with spaces\temp\Thread-11\img-%03d.png" "C:\Program Files\tomcat 6.0.33 with spaces\temp\tmpfile.tmp"


Linux

Tried to enclose file names in double quotes
gs -q -dNOPAUSE -dBATCH -sDEVICE=pnggray -r300 -sOutputFile="/home/nic/tomcat/6.0.33 with spaces/temp/Thread-11/img-%03d.png" "/home/nic/tomcat/6.0.33 with spaces/temp/tmpfile.tmp"
Tried to escape white space with backslash
gs -q -dNOPAUSE -dBATCH -sDEVICE=pnggray -r300 -sOutputFile=/home/nic/tomcat/6.0.33\ with\ spaces/temp/Thread-11/img-%03d.png /home/nic/tomcat/6.0.33\ with\ spaces/temp/tmpfile.tmp
Tried both together
gs -q -dNOPAUSE -dBATCH -sDEVICE=pnggray -r300 -sOutputFile="/home/nic/tomcat/6.0.33\ with\ spaces/temp/Thread-11/img-%03d.png" "/home/nic/tomcat/6.0.33\ with\ spaces/temp/tmpfile.tmp"

解决方案
Why don't you use Runtime.exec(String[] args) which takes multiple arguments ? This variant is designed to avoid you having to escape such arguments. Since the arguments are provided separately there's no space-based interpolation required and thus no confusion.

                        
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