程序代码：

public static void main(String[] args) throws Exception{
    File afile=new File("C:/Users/liudenghong/Downloads/b.txt");
    FileInputStream red=new FileInputStream(afile);
    InputStreamReader in=new InputStreamReader(red,"UTF-8");
    BufferedReader buf=new BufferedReader(in);
    String line=buf.readLine();
    while(line!=null){
        System.out.println(line);
        line=buf.readLine();
    }
}