public class Test {

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

    //转换流以单个英文或单个中文为一个字符读取可直接转换为char类型输出
    InputStreamReader input=new InputStreamReader(new FileInputStream("xxx.txt"));
    int tem;
    while((tem=input.read())!=-1){
      System.out.print((char)tem);
    }
    input.close();

  }
}