FileInputStream利用缓冲数组读取数据

package cd.itcast.fileinputstream;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;

public class Demo1 {
    public static void main(String[] args) throws IOException {
        //目标文件
        File file =new File("E:\\a.txt");
        //创建通道
        FileInputStream fileInputStream = new FileInputStream(file);
        //创建缓冲数组
        byte[] buf = new byte[1024];
        //用数组去读取数据,此时read()返回，读取的数量，当读到空时，返回-1.
        while (fileInputStream.read(buf)!=-1) {
            System.out.println("内容："+new String(buf));
        }
        //关闭
        fileInputStream.close();
    }
}