Java运行时执行与路径名称上的白色空间

时间:2015-10-12 09:02:08

标签: java macos shell

我正在尝试运行OSX命令,该命令是将某些plist转换为json格式的plutil。我在终端中使用的命令是

 plutil -convert json -o - '/Users/chris/project/temp tutoral/project.plist'

这个带有白色间距的路径名的命令在我的终端中工作正常,撇号(“)符号覆盖了路径名,但问题是在java的Runtime.getRuntime().exec(cmdStr)下面运行这个命令是我写的代码< / p>

public static void main(String args[]){
        LinkedList<String> output = new LinkedList<String>();
        String cmdStr = "plutil -convert json -o - /Users/chris/project/temp tutoral/project.plist";
        //String cmdStr = " plutil -convert json -o - '/Users/chris/project/temp tutoral/project.plist'";
        //String [] cmdStr ={ "plutil -convert json -o - ", "\"Users/chris/project/temp tutoral/project.plist\""};

        Process p;
        try {
            p = Runtime.getRuntime().exec(cmdStr);
            BufferedReader reader = new BufferedReader(new InputStreamReader(p.getInputStream()));
            String line = "";
            while ((line = reader.readLine()) != null) {
                output.add(line);
                System.out.println(line);
            }


        } catch (Exception e) {
            e.printStackTrace();
        }
    }

如果我运行此代码,它会给我一个错误

'Users/chris/project/temp: file does not exist or is not readable or is not a regular file (Error Domain=NSCocoaErrorDomain Code=260 "The file “temp” couldn’t be opened because there is no such file." UserInfo=0x7fd6b1c01510 {NSFilePath='Users/chris/project/temp, NSUnderlyingError=0x7fd6b1c01280 "The operation couldn’t be completed. No such file or directory"})
tutoral/project.plist': file does not exist or is not readable or is not a regular file (Error Domain=NSCocoaErrorDomain Code=260 "The file “project.plist” couldn’t be opened because there is no such file." UserInfo=0x7fd6b1d6dd00 {NSFilePath=tutoral/project.plist', NSUnderlyingError=0x7fd6b1d6c6b0 "The operation couldn’t be completed. No such file or directory"})

我也试过了,

  • 在命令字符串中放入撇号
  • 按照建议我的几个网站
  • 更改数组字符串中的命令

但他们没有工作。

如果我在安排命令或任何语法错误方面做错了,请提供建议。提前谢谢。

2 个答案:

答案 0 :(得分:1)

试试这个

/Users/chris/project/temp\ tutoral/project.plist

编辑:我在第一篇文章

上错误地反对了

答案 1 :(得分:1)

调用Runtime.getRuntime().exec(cmdStr)是一种便捷方法 - 使用数组调用命令的快捷方式。它将命令字符串拆分为空格,然后使用生成的数组运行命令。

因此,如果你给它一个字符串,其中任何参数都包含空格,它不像shell那样解析引号,但只是把它分成如下部分:

// Bad array created by automatic tokenization of command string
String[] cmdArr = { "plutil",
                    "-convert",
                    "json",
                    "-o",
                    "-",
                    "'/Users/chris/project/temp",
                    "tutoral/project.plist'" };

当然,这不是你想要的。所以在这种情况下,你应该将命令分解为你自己的数组。每个参数都应该在数组中有自己的元素,并且您不需要为包含空格的参数添加额外的引用:

// Correct array 
String[] cmdArr = { "plutil",
                    "-convert",
                    "json",
                    "-o",
                    "-",
                    "/Users/chris/project/temp tutoral/project.plist" };

请注意,启动流程的首选方法是使用ProcessBuilder,例如:

p = new ProcessBuilder("plutil",
                       "-convert",
                       "json",
                       "-o",
                       "-",
                       "/Users/chris/project/temp tutoral/project.plist")
       .start();

ProcessBuilder提供了更多可能性,并且不鼓励使用Runtime.exec