http://www.verejava.com/?id=1699461971466

package com.io;

import java.io.*;

public class TestInputStream
{
    public static void main(String[] args)
    {
        InputStream is=null;
        try
        {
            //建立了跟文件 english.txt 的連接
            is=new FileInputStream(new File("res/english.txt"));
            //讀取數據
            byte[] data=new byte[1024];
            //將文件中的數據 全部讀取到 data 字節數組裏面
            is.read(data);
            //輸出從文件讀取的數據
            System.out.println(new String(data));
            
        }
        catch (Exception e)
        {
            e.printStackTrace();
        }
        finally
        {
            //關閉文件
            try
            {
                is.close();
            }
            catch (IOException e)
            {
                e.printStackTrace();
            }
        }
    }
}





english.txt 內容 

Provides classes that are fundamental to the design of the Java programming language.
 

http://www.verejava.com/?id=1699461971466

Java IO流 之 FileInputStream 讀取文件