【发布时间】:2012-01-14 07:57:07
【问题描述】:
我正在尝试用 java 编写一个 unix 终端仿真器。我有很多麻烦。我似乎无法更改程序的工作目录,因此“cd”之类的命令无法正常工作。我的问题是,如果我运行一个需要用户输入的命令,有没有办法将该输入发送到正在运行的进程?
非常感谢,帮了大忙。这是一个例子: InputStream in = null; 输出流 outS = null;
StringBuffer commandResult = new StringBuffer();
String line = null;
int readInt;
p = Runtime.getRuntime().exec("gksudo apt-get install firefox");
int returnVal = p.waitFor();
in = p.getInputStream();
while ((readInt = in.read()) != -1)
commandResult.append((char)readInt);
outS = (BufferedOutputStream) p.getOutputStream();
outS.write("Y".getBytes());
outS.close();
System.out.println(commandResult.toString());
in.close();
这是输出:
Reading package lists...
Building dependency tree...
Reading state information...
The following packages were automatically installed and are no longer required:
libmono2.0-cil libmono-data-tds2.0-cil libmono-system-data2.0-cil
libdbus-glib1.0-cil librsvg2-2.18-cil libvncserver0 libsqlite0
libmono-messaging2.0-cil libmono-system-messaging2.0-cil
libmono-system-data-linq2.0-cil libmono-sqlite2.0-cil
libmono-system-web2.0-cil libwnck2.20-cil libgnome-keyring1.0-cil
libdbus1.0-cil libmono-wcf3.0-cil libgdiplus libgnomedesktop2.20-cil
Use 'apt-get autoremove' to remove them.
The following extra packages will be installed:
firefox-globalmenu
Suggested packages:
firefox-gnome-support firefox-kde-support latex-xft-fonts
The following NEW packages will be installed:
firefox firefox-globalmenu
0 upgraded, 2 newly installed, 0 to remove and 5 not upgraded.
Need to get 15.2 MB of archives.
After this operation, 30.6 MB of additional disk space will be used.
Do you want to continue [Y/n]? Abort.
为什么在我可以输入“Y”之前它就中止了?
【问题讨论】:
-
您可以使用从流程中获得的输出流将来自用户的输入通过管道传输到流程。