package com.dhb.file;

 import java.io.BufferedReader;

 import java.io.File;

 import java.io.FileInputStream;

 import java.io.FileNotFoundException;

 import java.io.FileOutputStream;

 import java.io.IOException;

 import java.io.InputStream;

 import java.io.InputStreamReader;

 import java.io.OutputStreamWriter;

 /**

  * @author DSHORE / 2018-7-20

  *

  */

 public class Demo27 {

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

         //readTest();

         //writerTest();

         //writerTest2();

         readTest2();

     }

     //使用输入字节流色转换流指定编码读取文件

     public static void readTest2() throws IOException{

         File file=new File("F:\\a.txt");

         FileInputStream fileInputStream=new FileInputStream(file);

         InputStreamReader inputStreamReader=new InputStreamReader(fileInputStream,"utf-8");

         char[] buf=new char[];

         int length=;

         while((length=inputStreamReader.read(buf))!=-){

             System.out.println(new String(buf,,length));

         }

     }

     //使用输出字节流转换流指定编码

     public static void writerTest2() throws FileNotFoundException, IOException{

         File file=new File("F:\\a.txt");

         //建立数据的输出通道

         FileOutputStream fileOutputStream=new FileOutputStream(file);

         // 可以把输出字节流转换为输出字符流

         OutputStreamWriter outputStreamWriter=new OutputStreamWriter(fileOutputStream, "utf-8");

         outputStreamWriter.write("你好吗!");

         //关闭资源

         outputStreamWriter.close();

     }

     //

     public static void writerTest() throws FileNotFoundException, IOException{

         File file=new File("F:\\a.txt");

         //建立数据的输出通道

         FileOutputStream fileOutputStream=new FileOutputStream(file,true);//true的作用：在文件的原有数据的末尾继续添加数据；如果不写true，原有的数据将被现在要写进去的数据替代掉。

         // 可以把输出字节流转换为输出字符流

         OutputStreamWriter outputStreamWriter=new OutputStreamWriter(fileOutputStream);

         outputStreamWriter.write("你好吗!");

         //关闭资源

         outputStreamWriter.close();

     }

     public static void readTest() throws IOException{

         InputStream in=System.in;//获取标准的输入流

         //System.out.println("读到的字符:"+(char)in.read());

         //把字节流转换为字符流

         InputStreamReader inputStreamReader=new InputStreamReader(in);

         //使用字符缓冲流

         BufferedReader bufferedReader=new BufferedReader(inputStreamReader);

         String line=null;

         while((line=bufferedReader.readLine())!=null){

             System.out.println("内容："+line);

         }

     }

 }