java - 如何在 Mac 上从 Java 运行 Python3 文件

Question

我使用标准 Java 例程来执行终端命令，但是我无法让它运行包含参数的 python 文件。

终端命令(在终端上运行)是:

python3 umlsConverter.py colon cancer

其中结肠癌是 N 个可能的字符串参数之一

我通常(从 Eclipse)运行来执行终端命令的 Java 例程是:

public static String execCmdV2(String cmd,String workingDirectoryPath) {

    Runtime rt = Runtime.getRuntime();
    //String[] commands = {"system.exe","-get t"};
    String[] env= {};
    Process proc;
    File runDir = new File(workingDirectoryPath);
    try {
        proc = rt.exec(cmd,env,runDir);
    } catch (IOException e1) {
        System.out.println("Error executing command:" + e1.getLocalizedMessage());
        return null;
    }

    BufferedReader stdInput = new BufferedReader(new 
         InputStreamReader(proc.getInputStream()));

    BufferedReader stdError = new BufferedReader(new 
         InputStreamReader(proc.getErrorStream()));

    // read the output from the command
    System.out.println("Here is the standard output of the command:\n");
    String fullOutputstring = null;
    String s = null;
    try {
        while ((s = stdInput.readLine()) != null) {
            System.out.println(s);
            fullOutputstring = fullOutputstring + s;
        }
    } catch (IOException e) {
        System.out.println("Unable to output the results due to error:" + e.getLocalizedMessage());
        return null;
    }

    // read any errors from the attempted command
    System.out.println("Here is the standard error of the command (if any):\n");
    try {
        while ((s = stdError.readLine()) != null) {
            System.out.println(s);
        }
    } catch (IOException e) {
        System.out.println("Unable to output the errors due to error:" + e.getLocalizedMessage());
        return null;
    }
    return fullOutputstring;
}

当我运行例程时遇到的错误:

cmd = "python3 umlsConverter.py Breast cancer"

和

`workingDirectoryPath="/Users/n9569065/QuickUMLS"`

是

执行命令时出错:无法运行程序“python3”(在目录“/Users/n9569065/QuickUMLS”中):错误=2，没有这样的文件或目录

我认为问题与访问 python3 有关？

Answer 1

使用 python 可执行文件的完整路径。例如:/usr/bin/python3