public class BufferedWirter_ {
    public static void main(String[] args) throws IOException {
        String filepath = "e:\\ABC.txt";
        //创建BufferedWrite对象
        BufferedWriter bufferedWriter = new BufferedWriter(new FileWriter(filepath,true));
        //BufferedWriter 并没有提供追加append true的方式，因此可以在FileWriter中加入true
        String str = "I love write progress!";
        bufferedWriter.write(str+"\n");
        bufferedWriter.write(str+"签名人：XXX\n");
        bufferedWriter.write(str+"睡梦人");

        //另一个换行格式
        bufferedWriter.newLine();
        bufferedWriter.write("这是新的一行~");

        System.out.println("文字已经打印到文件中~");
        //说明：关闭外层流即可，传入的 new FileWriter(filePath),会在底层关闭
        bufferedWriter.close();
    }
}