java文件复制代码片断(java实现文件拷贝)

try {
            File inputFile = new File(args[0]);
            if (!inputFile.exists()) {
                System.out.println("源文件不存在，程序终止");
                System.exit(1);
            }
            File outputFile = new File(args[1]);
            InputStream in = new FileInputStream(inputFile);
            OutputStream out = new FileOutputStream(outputFile);
            byte date[] = new byte[1024];
            int temp = 0;
            while ((temp = in.read(date)) != -1) {
                out.write(date);
            }
            in.close();
            out.close();
        } catch (FileNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }