redirectexample.java

来自「java 完全探索的随书源码」· Java 代码 · 共 42 行

import java.io.*;
import java.sql.Timestamp;

class RedirectExample
{
  // Change this path if you are using unix or want another path
  public static final String FILE = "c:\\systemin.txt";

  public static void main(String args[])
  {
    try
    {
      // Create a file output stream and set the append = true flag
      FileOutputStream outStr = new FileOutputStream( FILE, true );
      // create a print stream so that we can connect to System.out
      PrintStream printStream  = new PrintStream( outStr );

      // Tell System.out to redirect to the printStream that we've created
      System.setOut( printStream );

      // Print out some text. It should not go to the console, but to the
      // text file created above.
      Timestamp now = new Timestamp( System.currentTimeMillis() );
      System.out.println( now.toString() + ": This is text that should go to the file" );

      // Close the open Resources
      outStr.close();
      printStream.close();
    }
    catch( FileNotFoundException ex )
    {
      ex.printStackTrace();
      System.exit( -1 );
    }
    catch( IOException ex )
    {
      ex.printStackTrace();
      System.exit( -1 );
    }
  }
}