csv文件默认编码为ANSI，这里出现乱码主要是编码不一致问题
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"));//这里如果csv文件编码格式是utf-8,改成utf-8即可