将 Java System.out 快速便捷地重定向到文件和控制台

try
{
    FileOutputStream fout= new FileOutputStream("stdout.log");
    FileOutputStream ferr= new FileOutputStream("stderr.log");
    
    TeeOutputStream multiOut= new TeeOutputStream(System.out, fout);
    TeeOutputStream multiErr= new TeeOutputStream(System.err, ferr);
    
    PrintStream stdout= new PrintStream(multiOut);
    PrintStream stderr= new PrintStream(multiErr);
    
    System.setOut(stdout);
    System.setErr(stderr);
}
catch (FileNotFoundException ex)
{
    //Could not create/open the file
}