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  • 重定向标准流

    重定向标准流

        重定向标准流
           

                 

        下载源代码


        〖 作者:站长整理 〗〖 大小:1k 〗〖 发布日期:2005-08-04 〗〖 浏览:145 〗



         import java.io.*;





        public class Redirect

        {

            public static void main (String args[])

            {

        InputStream origIn = System.in;

        PrintStream origOut = System.out;

        PrintStream origErr = System.err;



        InputStream stdin = null;

        try

            {

            stdin = new FileInputStream ("Redirect.in");

            }

        catch (Exception e)

            {

            System.exit (1);

            }    

        // Create a new output stream for the standard output.

        PrintStream stdout = null;

        try

            {

            stdout = new PrintStream (

        new FileOutputStream ("Redirect.out"));

            }

        catch (Exception e)

            {

            // Sigh.  Couldn't open the file.

            System.exit (1);

            }



        // Create new output stream for the standard error output.

        PrintStream stderr = null;

        try

            {

            stderr = new PrintStream (

        new FileOutputStream ("Redirect.err"));

            }

        catch (Exception e)

            {

            // Sigh.  Couldn't open the file.

            System.exit (1);

            }



                origOut.println ("\n11111111");

                System.out.println ("22222222222222");

                origOut.println ("333333");

                System.err.println ("4444444444444444444");

                origErr.println ("55555555555555");



        // Set the System out and err streams to use our replacements.

        System.setIn ( stdin );//重定向标准输入流

        System.setOut ( stdout );//重定向标准输出流

        System.setErr ( stderr );//重定向错误流



                origOut.println ("\666666666666666666");

                System.out.println ("aaaaaaaaaaaaaa");

                origOut.println ("777777777777");

                System.err.println ("bbbbbbbbbbbbb");

                origErr.println ("99999999999999999999999");



        // Read some input and dump it to the console.

                origOut.println ("\n11111111111111111111111");

        int inChar = 0;

        while (-1 != inChar)

            {

            try

        {

        inChar = System.in.read();

        }

            catch (Exception e)

        {

        // Clean up the output and bail.

        origOut.print ("\n");

        break;

        }

            origOut.write (inChar);

            }



        // Close the streams.

        try

            {

            stdin.close ();

            stdout.close ();

            stderr.close ();

            }

        catch (Exception e)

            {

            origOut.println ("Redirect:  Unable to close files!");

            System.exit (1);

            }



        System.exit (0);

            }

        }

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  • 原文地址:https://www.cnblogs.com/lexus/p/2370381.html
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