在Java中运行命令行程序而没有绝对路径

Question

I'm trying to run Ant from a Java program. This works:

// Compile project
ProcessBuilder pb =
        new ProcessBuilder("/usr/local/Cellar/ant/1.9.6/libexec/bin/ant", "-f", pathToProject + "build.xml");
Process p = pb.start();
p.waitFor();

However, this program will be used on machines other than my own, so I'd rather instantiate the ProcessBuilder like this:

new ProcessBuilder("ant", "-f", pathToProject + "build.xml");

Although ant -f build.xml works on my Mac terminal, placing the above code in my program outputs java.io.IOException: Cannot run program "ant": error=2, No such file or directory .

How can I programmatically show ProcessBuilder where Ant is located? This program will be run on OS X and possibly Ubuntu.

Note: This question is not Ant-specific. I need use ProcessBuilder to invoke other command-line tools as well.

Answer 1

通过使Ant可通过属性文件进行自定义，将其绝对路径注入ProcessBuilder。这样，您只需在属性文件中提供相应的路径即可在多个环境中运行。