java--字节流和字符流的转换

package com.machuang.convertStream;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStreamReader;

public class Demo01 {
    
    public static void main(String[] args) throws IOException {
        BufferedReader reader = new BufferedReader( 
                new InputStreamReader(
                    new FileInputStream( // a.txt 以utf-8编码集保存字符
                            new File("F:/win10/test/a.txt") ), "UTF-8" ) );
        
        String str = null;
        while(null != (str = reader.readLine())) {
            System.out.println(str);
        }
        
        reader.close();
    }
    
}