引用：http://blog.sina.com.cn/s/blog_6a5a46790100lhub.html
读取html文件乱码：
BufferedReader read = new BufferedReader(new FileReader(new File(filename)));
解决办法：
InputStreamReader isr = new InputStreamReader(new FileInputStream(file), "UTF-8");
BufferedReader read = new BufferedReader(isr);
因为InputStreamReader和BufferedReader都继承自Reader,而BufferedReader的构造器又是Reader.
