package cn.happy2;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
public class Day01 {
/**
* 1.1 读取硬盘上的一个文本文件
* @throws IOException
*/
public static void main(String[] args) throws IOException {
//FileInputStream
FileInputStream fis=new FileInputStream("E:/S2226.txt");
//1.定义一个缓冲区 byte[]
byte[] bytes=new byte[1024];//1k 1.5k
//
int data;
while((data=fis.read(bytes))!=-1){ //有数据可读
//byte[] String
String temp=new String(bytes,0,data);
System.out.println(temp);
}
fis.close();
}
}
写入文件
package cn.happy2;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
public class Day02 {
/**
* 1.1 写入文件
*
* @throws IOException
*
* */
public static void main(String[] args) throws IOException {
String words="写入）";
FileOutputStream fos=new FileOutputStream("E:/S2226.txt");
byte[] bytes = words.getBytes();
fos.write(bytes);
fos.close();
System.out.println("ok！");
}
}
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