使用Java(OSX)在终端中调用命令 [英] Call a command in terminal using Java (OSX)

问题描述

我正在尝试编写Java代码以运行wget从服务器检索图像

I am trying to write Java code to run wget to retrieve an image from a server

我相信我已经正确安装了wget.如果我输入:

I believe that I have wget properly installed. If I type:

wget http://insitu.fruitfly.org/insitu_image_storage/img_dir_38/insitu38795.jpe

我在用户帐户文件夹中找到该图像.

I find the image in my user account folder.

以下Java代码在Ubuntu上正常运行，但是我不得不将项目移至OSX(Mountain Lion)

The following Java code was working properly on Ubuntu, but I had to move the project over to OSX (Mountain Lion)

import java.io.*;
import java.io.IOException;

public class runWget
{

  public static void main (String args[])
  {
    String whatToRun = "wget     http://insitu.fruitfly.org/insitu_image_storage/img_dir_38/insitu38795.jpe";
   try
   {
     Runtime rt = Runtime.getRuntime();
     Process proc = rt.exec(whatToRun);
     int exitVal = proc.waitFor();
     System.out.println("Process exitValue:" + exitVal);
   } catch (Throwable t)
     {
       t.printStackTrace();
     }
  }
}

当我尝试在OSX上运行它时，出现运行时错误:

When I try to run it on OSX, I get the runtime error:

java.io.IOException:无法运行程序"wget":error = 2，没有这样的文件 或目录

java.io.IOException: Cannot run program "wget": error=2, No such file or directory

如果有人能告诉我我做错了，我将不胜感激.

I would greatly appreciate if someone could tell me what I am doing wrong.

推荐答案

如果您的OS X系统上确实安装了wget，请尝试指定其完整路径.

If wget is indeed installed on your OS X system, then try to specify the full path to it.

尝试:

哪个wget

which wget

在命令行中，然后在Java应用程序中使用该标准路径.

from the command line, then use that fully qualified path in your Java application.

String whatToRun = "/usr/local/bin/wget http://insitu.fruitfly.org/insitu_image_storage/img_dir_38/insitu38795.jpe";

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