java读取csv格式的文件，编码是utf-8 mysql也是utf-8，读取打印正常为什么存到数据库文字乱码？

java代码如下：

String filePath = "C://***//**.csv";
        BufferedReader bufferedReader = null;
        Connection  conn = null;
        String driver = "com.mysql.jdbc.Driver";
        String url = "jdbc:mysql://192.168.9.90:3306/***";
        try {
            Class.forName(driver);
             conn =  DriverManager.getConnection(url, "**", "***");
     
            bufferedReader = new BufferedReader(new InputStreamReader(new FileInputStream(filePath)));
            String line =null;
            File file=new File(filePath);
            CodepageDetectorProxy detector = CodepageDetectorProxy.getInstance();
            detector.add(new ParsingDetector(false));
            detector.add(JChardetFacade.getInstance());
            detector.add(ASCIIDetector.getInstance());
            detector.add(UnicodeDetector.getInstance());
            java.nio.charset.Charset charset = null;
            try {
                charset = detector.detectCodepage(file.toURI().toURL());
            } catch (Exception ex) {
                ex.printStackTrace();
            }
            String charsetName = null;
            if (charset != null) {
                charsetName = charset.name();
                    
            } else {
                charsetName = "UTF-8";
            }
            System.out.println(charsetName);
           while ((line = bufferedReader.readLine()) != null) {
                String[] columns = line.split("\t");
                 String last = columns[1];
                 System.out.println(last);
                 PreparedStatement pstmt = conn.prepareStatement("insert into ordernew(c1,c2,c3,c4,c5,c6,c7,c8,c9,c10,c11,c12,c13) values(?,?,?,?,?,?,?,?,?,?,?,?,?)");
                 pstmt.setString(1, columns[0]);
                 pstmt.setString(2, columns[1]);
                 pstmt.setString(3, columns[2]);
                 pstmt.setString(4, columns[3]);
                 pstmt.setString(5, columns[4]);
                 pstmt.setString(6, columns[5]);
                 pstmt.setString(7, columns[6]);
                 pstmt.setString(8, columns[7]);
                 pstmt.setString(9, columns[8]);
                 pstmt.setString(10, columns[9]);
                 pstmt.setString(11, columns[10]);
                 pstmt.setString(12, columns[11]);
                 pstmt.setString(13, columns[12]);
                 pstmt.executeUpdate();
            }
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }finally{
            try {
                conn.close();
                bufferedReader.close();
            } catch (Exception e) {
                e.printStackTrace();
            }
        }