使用java运行交互式shellScript

Question

我正在编写一个javacode来调用交互式shellScript并使用进程生成器来调用shellscript。我知道要传递参数给这个shell脚本，我必须通过输入流来检查它的输出，并且需要使用输出流来传递命令。我的问题是，我怎么会知道使用输入流它提示输入值？

我的代码：

ProcessBuilder pb2=new ProcessBuilder("/home/abhijeet/sample1.sh","--ip="+formobj.getUpFile().getFileName(),"--seqs="+seqs); 

     script_exec = pb2.start(); 

       OutputStream in = script_exec.getOutputStream(); 

       InputStreamReader rd=new InputStreamReader(script_exec.getInputStream()); 

       pb2.redirectError(); 

       BufferedReader reader1 =new BufferedReader(new InputStreamReader(script_exec.getInputStream())); 

       StringBuffer out=new StringBuffer(); 

       String output_line = "";  

        while ((output_line = reader1.readLine())!= null) 
        { 
          out=out.append(output_line+"/n"); 
          System.out.println("val of output_line"+output_line); 

          //---> i need code here to check that whether script is prompting for taking input ,so i can pass it values using output stream 

        } 

有没有什么办法可以直接知道脚本正在等待来自用户的输入？

Answer 1

读取进程输出流并检查输入提示符，如果知道输入提示符，则将这些值放入inupt流中。 否则你无法检查。

ProcessBuilder pb = new ProcessBuilder(command); 
pb.redirectErrorStream(true); 
BufferedReader b1 = new BufferedReader(new InputStreamReader(p.getInputStream())); 
BufferedWriter w1 = new BufferedWriter(new OutputStreamWriter(p.getOutputStream())); 
String line = ""; 
String outp = ""; 
while ((line = b1.readLine()) != null) { 
    if (line.equals("PLEASE INPUT THE VALUE:")) { 
    // output to stream 
    w1.write("42"); 
    } 
    outp += line + "\n"; 
} 

... 

UPD：为你的代码应该是类似的东西

ProcessBuilder pb2=new ProcessBuilder("/home/ahijeet/sample1.sh","--ip="+formobj.getUpFile().getFileName(),"--seqs="+seqs); 

    script_exec = pb2.start(); 

      OutputStream in = script_exec.getOutputStream(); 

      InputStreamReader rd=new InputStreamReader(script_exec.getInputStream()); 

      pb2.redirectError(); 

      BufferedReader reader1 =new BufferedReader(new InputStreamReader(script_exec.getInputStream())); 

      StringBuffer out=new StringBuffer(); 

      String output_line = "";  

       while ((output_line = reader1.readLine())!= null) 
       { 
         out=out.append(output_line+"/n"); 
         System.out.println("val of output_line"+output_line); 

         //---> i need code here to check that whether script is prompting for taking input ,so i can pass it values using output stream 
         if (output_line.equals("PLEASE INPUT THE VALUE:")) { 
          // output to stream 
          in.write("42"); 
         } 

       }