Java执行命令行程序

发布于 2025-01-06 13:48:49 字数 421 浏览 0 评论 0原文

我在执行命令行工具时遇到一些问题。我想从 WinRAR 执行 UnRAR.exe。我这样做：

Process process = runtime.exec("\"" + unrarPath + "\"" + " x -kb -vp " + "\"" + fileName + "\"", null, f.getParentFile());

我的问题是压缩文件受密码保护。如果我在控制台中执行该命令，系统会要求我输入密码。如果我让 Java 执行它，程序就会结束并且永远不会等待用户输入（密码）。

我尝试写入进程输出流，但这不起作用。关于在“不同”环境中执行的命令行程序的行为，我需要了解什么吗？

编辑：也许我还不够清楚。我的问题是：是否可以使用 Java 与命令行程序交互？

原文

I have a little problem with executing a command line tool. I want to execute UnRAR.exe from WinRAR. I do it like this:

Process process = runtime.exec("\"" + unrarPath + "\"" + " x -kb -vp " + "\"" + fileName + "\"", null, f.getParentFile());

My problem is that the compressed file is password protected. If I execute the command in my console I'm asked for a password. If I let Java execute it the program just ends and never waits for a user input (the password).

I tried to write to the process outputstream but that didn't work. Is there anything I need to know about the behavior of command line programs executed in "different" environments?

EDIT: Maybe I wasn't clear enough. My question is: Is it possible to interact with a command line program with Java?

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那片花海 2025-01-13 13:48:49

对我有用。也许您没有编写换行符并刷新流？

Process tr = Runtime.getRuntime().exec( new String[]{ "cat" } );
Writer wr = new OutputStreamWriter( tr.getOutputStream() );
BufferedReader rd = new BufferedReader( new InputStreamReader( tr.getInputStream() ) );
wr.write( "hello, world\n" );
wr.flush();
String s = rd.readLine();
System.out.println( s );

http://ideone.com/OUGYv

+1回答你的问题，java.lang.Process就是我的问题正在寻找！

Works for me. Perhaps you didn't write a newline and flush the stream?

Process tr = Runtime.getRuntime().exec( new String[]{ "cat" } );
Writer wr = new OutputStreamWriter( tr.getOutputStream() );
BufferedReader rd = new BufferedReader( new InputStreamReader( tr.getInputStream() ) );
wr.write( "hello, world\n" );
wr.flush();
String s = rd.readLine();
System.out.println( s );

http://ideone.com/OUGYv

+1 to your question, java.lang.Process was what I was looking for!

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