package com.jack.io;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
public class main {
public static void main(String[] args) throws Exception {
//文件的复制
long s = System.currentTimeMillis();
File file1 = new File("D:\test1.txt");
File file2 = new File("D:\test2.txt");
char[] cs = new char[1024];
FileReader fileReader = new FileReader(file1);
FileWriter fileWriter = new FileWriter(file2, true); //true 后面继续写入,不覆盖
while (fileReader.read(cs) != -1) {
fileWriter.write(cs);
}
fileReader.close();
fileWriter.flush();
fileWriter.close();
long e = System.currentTimeMillis();
System.out.println("复制文件,耗时毫秒:" + (e - s));
}
}