关于Process中的getOutputStream

2014-12-30 10:20:38 480 阅读 AI 写同款 · GEO 优化AI 选题数据监测一键分发 ›

一直不明白 getOutputStream 到底有什么作用

Test test=new Test();

		Runtime runtime = Runtime.getRuntime();

		Process process=null;

		try {

			process=runtime.exec("java -version");

			InputThread in=test.new InputThread(process);

			ErrorInputThread error=test.new ErrorInputThread(process);

			in.start();

			error.start();

			try {

				OutputStream stream = process.getOutputStream();

				stream.write("ipconfig".getBytes());

				stream.flush();

				stream.close();

				int waitFor = process.waitFor();

				process.destroy();

			} catch (Exception e) {

				// TODO Auto-generated catch block

				e.printStackTrace();

			}

		} catch (IOException e) {

			// TODO Auto-generated catch block

			e.printStackTrace();

		}

如果OuputStream是父进程向子进程的输入流的话那么应该会先执行java -version 然后是ipconfig 命令

如果是子进程的输入流的话那么我执行

Test test=new Test();

		// TODO Auto-generated method stub

		Runtime runtime = Runtime.getRuntime();

		Process process=null;

		try {

			process=runtime.exec("notepad.exe");

			InputThread in=test.new InputThread(process);

			ErrorInputThread error=test.new ErrorInputThread(process);

			in.start();

			error.start();

			try {

				OutputStream stream = process.getOutputStream();

				stream.write("ipconfig".getBytes());

				stream.flush();

				stream.close();

				int waitFor = process.waitFor();

				process.destroy();

			} catch (Exception e) {

				// TODO Auto-generated catch block

				e.printStackTrace();

			}

		} catch (IOException e) {

			// TODO Auto-generated catch block

			e.printStackTrace();

		}