PrintWriter 类输出到文件

public static void main(String[] args) throws IOException {
        String path = "d:\\test.txt";
        FileWriter fw = new FileWriter(path, true); // true 表示在文件上续写
        PrintWriter pw = new PrintWriter(fw);
        String str = new String("hello");
        pw.write(str);
        pw.flush(); // 需要刷新缓冲区才能输出
        fw.flush();
        pw.close();
        fw.close();
    }