文件读写方法1.FileInputStream和FileOutputStream

package fileTest;

import java.io.File;

import java.io.FileInputStream;

import java.io.FileNotFoundException;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.InputStream;

public class Demo1 {

public static void main(String[] args) throws IOException {

File origin = new File("F:\\javagame\\ren\\ren.txt");

File copytxt = new File("F:\\javagame\\jie\\rencopy.txt");   //定义一个读的对象

FileInputStream readTest = new FileInputStream(origin);//抛出FileNotFoundException异常

//定义一个写的对象

FileOutputStream writeTest = new FileOutputStream(copytxt);//抛出FileNotFoundException异常

int r;

while((r = readTest.read()) != -1){   //抛出IOExeception异常

writeTest.write(r);               //r 为字节   一个字节一个字节的写入文档中

}

System.out.println("复制成功");

writeTest.close();

readTest.close();

}

}

/*

*一个字节一个字节读写效率低，不常用

*/