从Java调用Python [英] Call Python from Java

问题描述

我想从Java调用 python 脚本。我的python版本是2.5，Java是6。

我当前的代码：

  try {
 Process p = Runtime.getRuntime（）。exec（path / dirs / file.py）; 
 p.waitFor（）; 
} catch（InterruptedException ex）{
 System.out.println（ex.getMessage（））;} 
} 
  

我收到的错误是：

Java.IO.IOException：无法运行程序filename：CreateProcess错误
= 193，％1不是有效的Win32应用程序

解决方案

尝试使用 PrecessBuilder -

 试试{
 
 String prg =import sys \ nprint int（sys.argv [1]）+ int（sys.argv [2]）\ n; 
 BufferedWriter out = new BufferedWriter（new FileWriter（test1.py））; 
 out.write（prg）; 
 out.close（）; 
 int number1 = 10; 
 int number2 = 32; 
 
 ProcessBuilder pb = new ProcessBuilder（python，test1.py，+ number1，+ number2）; 
过程p = pb.start（）; 
 
 BufferedReader in = new BufferedReader（new InputStreamReader（p.getInputStream（）））; 
 int ret = new Integer（in.readLine（））。intValue（）; 
 System.out.println（value is：+ ret）; 
} catch（例外e）{System.out.println（e）;} 
  

有关更多详细信息，请参见此处。 / p>

I want to call a python script from Java. My python version is 2.5 and Java is 6.

My current code:

try{
    Process p= Runtime.getRuntime().exec("path/dirs/file.py");
    p.waitFor();
    } catch (InterruptedException ex){
    System.out.println(ex.getMessage());}
    }

The error I receive is:

Java.IO.IOException: Cannot run program filename: CreateProcess error = 193, %1 is not a valid Win32 application

解决方案

Try to use PrecessBuilder -

try{

   String prg = "import sys\nprint int(sys.argv[1])+int(sys.argv[2])\n";
   BufferedWriter out = new BufferedWriter(new FileWriter("test1.py"));
   out.write(prg);
   out.close();
   int number1 = 10;
   int number2 = 32;

   ProcessBuilder pb = new ProcessBuilder("python","test1.py",""+number1,""+number2);
   Process p = pb.start();

   BufferedReader in = new BufferedReader(new InputStreamReader(p.getInputStream()));
   int ret = new Integer(in.readLine()).intValue();
   System.out.println("value is : "+ret);
}catch(Exception e){System.out.println(e);}

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