用Java实现文件复制

实现：从控制台读取要复制的源文件名和目标文件名，将源文件中的内容复制到目标文件中

public class CopyFile {
    private static BufferedReader stdIn =
                                    new BufferedReader(
                                        new InputStreamReader(System.in))'
    private static PrintWriter stdOut =
                                    new PrintWriter(System.out, true);//标准结果
    private static PrintWriter stdErr = 
                                    new PrintWriter(System.err, true);//提示信息或者错误信息

    public static void main(String[] args) throws IOException {
        stdErr.print("Source filename:    ");
        stdErr.flush();//保证将上述提示信息显示在屏幕上

        BufferedReader input =  new BufferedReader(
                                    new FileReader(stdIn.readLine()));//读用户输入的内容
        stdErr.print("Destination filename：    ")；
        stdErr.flush();
        
        PrintWriter output = 
                new PrintWriter(new FileWriter(stdIn.readLine()));
        String line = input.readLine();

        while (line!=null) {
            output.println(line);
            line = input.readLine();
        }
        
        input.close();
        output.close();

        stdOut.println("done");
}