java _io_字符缓冲流(装饰器)纯文件的拷贝,使用缓冲流新增方法逐行读取和写入换行符

public static void main(String[]args) { File head=new File("D:/d/b"); File last=new File("D:/d/vv"); try(BufferedReader breader=new BufferedReader(new FileReader(head)); BufferedWriter bwriter=new BufferedWriter(new FileWriter(last))) { //用新方法逐行读取 String line=null; while((line=breader.readLine())!=null) { bwriter.write(line);//逐行写出 bwriter.newLine(); //每行写入一个换行符 bwriter.flush(); } }catch(FileNotFoundException e) { e.printStackTrace(); }catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } }