csv文件默認編碼為ANSI，這里出現亂碼主要是編碼不一致問題
DataInputStream in = new DataInputStream(new FileInputStream(new File("d:\\*.csv")));
DataInputStream in = new DataInputStream(new FileInputStream(new File("d:\\*.csv")));
BufferedReader br= new BufferedReader(new InputStreamReader(in,"GBK"));//這里如果csv文件編碼格式是utf-8,改成utf-8即可