PrintStream和PrintWriter

这两个都是打印流，第一个是字节打印流，第二个是字符打印流。都是用来将数据写到文本文件的。

类似于OutputSteam、BufferWriter、Writer

但是这个会更高效和简洁，因为里面封装了BufferWriter方法，所以在速度方面不比字符缓冲流慢，同时比字符缓冲流更简介

使用字符缓冲流将字符串的数据写到word.txt文件里：

public class a {public static final Logger log = LoggerFactory.getLogger("test_01.class");public static void main(String[] args) throws IOException {// 需要写到文本文件中的字符串String str = null;if (true) {str = "atch the star that holds your destiny, the one that forever twinkles within your heart. Take advantage of " +"precious opportunities while they still sparkle before you. Always believe that your ultimate goal is attainable as long as you commit yourself to it.\n" +"追随能够改变你命运的那颗星，那颗永远在你心中闪烁的明星。当它在你面前闪耀时，抓住这宝贵的机会。请谨记，只要你坚持不懈，最终的目标总能实现。\n" +"Though barriers may sometimes stand in the way of your dreams, remember that your destiny is hiding behind them. " +"Accept the fact that not everyone is going to approve of the choices you've made, " +"have faith in your judgment, catch the star that twinkles in your heart, and it will " +"lead you to your destiny's path. Follow that pathway and uncover the sweet sunrises that await you.\n" +"尽管实现梦想的途中有时会遇到障碍，要知道这是命运对你的挑战。不是每个人都会赞成你的选择，接受这个现实，并相信自我的判断，追随那颗在你心中闪烁的明星，" +"它会引领你踏上命运的征途。坚持不懈，你就能享受那些幸福时刻。";}BufferedWriter bos = new BufferedWriter(new FileWriter("word.txt"));long start_time = System.currentTimeMillis();log.info("-------------开始-----------");// 将str字符串的内容写到文本文件里bos.write(str,0,str.length());bos.close();long end_time = System.currentTimeMillis();log.info("共花了" + (end_time - start_time)/1000.0 + "毫秒" );log.info("-------------结束-----------");}
}

运行结果：

使用PrintWriter流将数据写到文本文件中：

    public static void main(String[] args) throws IOException {// 需要写到文本文件中的字符串String str = null;if (true) {str = "atch the star that holds your destiny, the one that forever twinkles within your heart. Take advantage of " +"precious opportunities while they still sparkle before you. Always believe that your ultimate goal is attainable as long as you commit yourself to it.\n" +"追随能够改变你命运的那颗星，那颗永远在你心中闪烁的明星。当它在你面前闪耀时，抓住这宝贵的机会。请谨记，只要你坚持不懈，最终的目标总能实现。\n" +"Though barriers may sometimes stand in the way of your dreams, remember that your destiny is hiding behind them. " +"Accept the fact that not everyone is going to approve of the choices you've made, " +"have faith in your judgment, catch the star that twinkles in your heart, and it will " +"lead you to your destiny's path. Follow that pathway and uncover the sweet sunrises that await you.\n" +"尽管实现梦想的途中有时会遇到障碍，要知道这是命运对你的挑战。不是每个人都会赞成你的选择，接受这个现实，并相信自我的判断，追随那颗在你心中闪烁的明星，" +"它会引领你踏上命运的征途。坚持不懈，你就能享受那些幸福时刻。";}PrintWriter bos = new PrintWriter(new FileWriter("word.txt"));
//        PrintWriter bos = new PrintWriter("word.txt");            可以直接写文件路径long start_time = System.currentTimeMillis();log.info("-------------开始-----------");// 将str字符串的内容写到文本文件里bos.write(str,0,str.length());bos.close();long end_time = System.currentTimeMillis();log.info("共花了" + (end_time - start_time)/1000.0 + "毫秒" );log.info("-------------结束-----------");}

对于字符缓冲流，速度和打印流一样，对于字节缓冲流来说，字节打印流速度会更快而且更高效

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