输出字符流--创建文件并写入信息

public static void createFileAndWriter(String message) {
    File file = new File("F:\\CreateDemo\\");
    if (!file.exists()) {
        file.mkdir();//创建一个新目录
    }
    FileWriter fileWriter=null;
    BufferedWriter writer = null;
    try {
        //当该目录下不存在demo.txt文件时，会自动创建
        fileWriter=new FileWriter("F:\\CreateDemo\\demo.txt");
        //创建一个缓冲区，加快写入速度
        writer = new BufferedWriter(fileWriter);
        writer.write(message);
        writer.close();
        fileWriter.close();
    } catch (IOException e) {
        System.out.println("写入信息发生错误！");
        e.printStackTrace();
    }
}