3.转换流

在io中分为字节流和字符流，但有时两者之间也可能需要转换，Java中为我们提供了InputStreamReader和OutoutStreamWtiter使两者之间转化。他们一个是reader的子类一个是writer的子类。

package com.package18;
import java.io.*;
public class Examples {
    public static void main(String[] args)throws IOException {
        //1.将字节输入流转换成字符输入流
        BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(new FileInputStream("./out.txt")));
         //2.将字节输出流转换成字符输入流
        BufferedWriter bufferedWriter = new BufferedWriter(new OutputStreamWriter(new FileOutputStream("./text/file.txt")));
        int tempp=0;
            while ((tempp=bufferedReader.read())!=-1){
               bufferedWriter.write(tempp);
            }
          //2.将字节输出流转换成字符输入流
        BufferedWriter bufferedWriter2 = new BufferedWriter(new OutputStreamWriter(new FileOutputStream("./text/file.txt",true)));
            //1.将字节输出流转换为字符输出流
        String str="我是中国人 也是河南人";
        bufferedWriter2.write(str);
        bufferedReader.close();
        bufferedWriter.flush();
        bufferedWriter.close();
        bufferedWriter2.flush();
        bufferedWriter2.close();
    }
}