java 读取mysql中数据 并取出

public static String url = null;
    public static String username = null;
    public static String password = null;
    public static Connection conn;
    public static Statement stmt;
    public static ResultSet rs;
    public static String fileName = null;
    public static List lists = new ArrayList();

    public static String PATH = "/dbconfig.properties";
    private static Properties properties;
    static {
        try {
            InputStream is = DBlUtils.class.getResourceAsStream(PATH);
            properties = new Properties();
            properties.load(is);
            url = properties.getProperty("jdbc.url");
            username = properties.getProperty("jdbc.username");
            password = properties.getProperty("jdbc.password");
            fileName = properties.getProperty("fileName");
            System.out.println("fileName:" + fileName);
            if (is != null)
                is.close();
        } catch (IOException e) {

            e.printStackTrace();
        }

    }

    public void closeConnection(Connection conn) {

        if (conn != null) {
            try {
                conn.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
    }



/**
     * 查询mysql 数据库数据，并获得内容
     * 
     * @param sql
     */
    public static void queryDatas(String sql) {

        try {
            conn = DriverManager.getConnection(url, username, password);
            conn.setAutoCommit(false);
            stmt = conn.prepareStatement("load data local infile '' " + "into table loadtest fields terminated by ','");
            StringBuilder sb = new StringBuilder();
            InputStream is = new ByteArrayInputStream(sb.toString().getBytes());
            ((com.mysql.jdbc.Statement) stmt).setLocalInfileInputStream(is);
            ResultSet rs = stmt.executeQuery(sql);
            ResultSetMetaData rsmd = rs.getMetaData();
            int columnCount = rsmd.getColumnCount();
            // 输出列名
            for (int i = 1; i <= columnCount; i++) {
                System.out.print(rsmd.getColumnName(i));
                System.out.print("(" + rsmd.getColumnTypeName(i) + ")");
                System.out.print(" | ");
            }
            System.out.println();
            // 输出数据
            while (rs.next()) {
                for (int i = 1; i <= columnCount; i++) {
                    System.out.print(rs.getString(i) + " | ");
                }
                System.out.println();
            }

            // conn.commit();
        } catch (SQLException e) {
            e.printStackTrace();
        }

    }

public static void main(String[] args) {

        String sql = "select * from tablename";
        queryDatas(sql);

    }