Java 写文件三种方法比较

import java.io.File;
import java.io.FileOutputStream;
import java.io.*;

public class FileTest {

    public static void main(String[] args) {

        FileOutputStream out = null;
        FileOutputStream outSTr = null;
        BufferedOutputStream Buff = null;
        FileWriter fw = null;

        int count = 1000;//写文件行数

        try {
            //经过测试:FileOutputStream执行耗时:17,6,10 毫秒
            out = new FileOutputStream(new File("C:\\Users\\lee\\Desktop\\add.txt"));
            long begin = System.currentTimeMillis();
            for (int i = 0; i  count; i++) {
                out.write("测试java 文件操作\r\n".getBytes());
            }
            out.close();
            long end = System.currentTimeMillis();
            System.out.println("FileOutputStream执行耗时:" + (end - begin) + " 毫秒");

            //经过测试:ufferedOutputStream执行耗时:1,1,1 毫秒
            outSTr = new FileOutputStream(new File("C:\\Users\\lee\\Desktop\\add0.txt"));
            Buff = new BufferedOutputStream(outSTr);
            long begin0 = System.currentTimeMillis();
            for (int i = 0; i  count; i++) {
                Buff.write("测试java 文件操作\r\n".getBytes());
            }
            Buff.flush();
            Buff.close();
            long end0 = System.currentTimeMillis();
            System.out.println("BufferedOutputStream执行耗时:" + (end0 - begin0) + " 毫秒");

            //经过测试:FileWriter执行耗时:3,9,5 毫秒
            fw = new FileWriter("C:\\Users\\lee\\Desktop\\add2.txt");
            long begin3 = System.currentTimeMillis();
            for (int i = 0; i  count; i++) {
                fw.write("测试java 文件操作\r\n");
            }
            fw.close();
            long end3 = System.currentTimeMillis();
            System.out.println("FileWriter执行耗时:" + (end3 - begin3) + " 毫秒");

        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                fw.close();
                Buff.close();
                outSTr.close();
                out.close();
            } catch (Exception e) {
                e.printStackTrace();
            }
        }

    }
}
最新回复(0)
Google XML地图百度 XML地图Google txt地图百度 txt地图17社