/**字符流相关

  * 2、InputStreamReader/ OutputStreamWriter(转换流,实现字节转字符)》》2-1：FileReader和FileWriter(用过，文件字符类)

  * 要点：

  * 1)、以字符流的形式操作字节流(仅限纯文本)

  * 2)、指定字符集

  *

  *

  */

 package cn.sxt.test;

 import java.io.BufferedReader;

 import java.io.BufferedWriter;

 import java.io.FileOutputStream;

 import java.io.IOException;

 import java.io.InputStreamReader;

 import java.io.OutputStreamWriter;

 import java.io.Reader;

 import java.net.URI;

 import java.net.URL;

 public class Test_0402_InputStreamReader {//System.in 字节输入流 ， System.out字节输出流

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

         /*InputStreamReader isr=new InputStreamReader(System.in);//控制台输入,通过这步字节已经转成字符了

         BufferedReader bReader=new BufferedReader(isr);//加个缓冲字符流

         OutputStreamWriter osr=new OutputStreamWriter(System.out);//控制台输出

         BufferedWriter bWriter=new BufferedWriter(osr);

         //基本操作，循环获取键盘的输入(输入"exit"退出循环)，输出此内容

         String msg="";

         while (!msg.equals("exit")) {

             msg=bReader.readLine();//逐行循环读取

             bWriter.write(msg);//逐行循环写出

             bWriter.newLine();//换行

             bWriter.flush();//强制刷新，即使缓冲区没满，也可以让缓冲区的内容强制出去。如果没这句只有缓冲区满才会输出

         }

         bReader.close();

         bWriter.close();    */

         //抓取baidu首页网页的源码

         URL url=new URL("http://www.baidu.com"); //url.openStream() 获得一个网络字节流

         InputStreamReader isr=new InputStreamReader(url.openStream(),"UTF-8");//通过这步字节已经转成字符了

         BufferedReader bReader=new BufferedReader(isr);

         FileOutputStream file =new FileOutputStream("baidu.html");

         OutputStreamWriter osr=new OutputStreamWriter(file,"UTF-8");//把读取到的保存在baidu.html文件中去

         BufferedWriter bWriter=new BufferedWriter(osr);

         String msg=null;

         while ((msg=bReader.readLine())!=null) {

             //System.out.println(msg);

             bWriter.write(msg);

             bWriter.newLine();

         }

         bWriter.flush();

         bReader.close();

         bWriter.close();

     }

 }