標籤:ring sys system out isp [] ++ main byte
1 package 檔案操作; 2 3 import java.io.File; 4 import java.io.FileInputStream; 5 import java.io.IOException; 6 import java.io.InputStream; 7 8 public class TestInputStream { 9 public static void main(String[] args) throws IOException {10 File file=new File("D:"+File.separator+"test.txt");11 12 /*一次性讀取檔案內容13 if(file.exists()){14 InputStream inputStream=new FileInputStream(file);15 byte[] bytes=new byte[1024];16 int length=inputStream.read(bytes);17 inputStream.close();18 System.out.println("【"+new String(bytes,0,length)+"】");19 }20 */21 22 if(file.exists()){//單個讀取23 InputStream inputStream=new FileInputStream(file);24 byte[] bytes=new byte[1024];25 int foot=0;26 byte tmp=0;27 while((tmp=(byte)inputStream.read())!=-1)28 bytes[foot++]=tmp;29 inputStream.close();30 System.out.println("【"+new String(bytes,0,foot)+"】");31 }32 }33 }View Code
【java】io流之位元組輸入資料流:java.io.InputStream類及子類java.io.FileInputStream