mysql 实现批量导入，并解决中文乱码问题

public static String url = "jdbc:mysql://ip/database?characterEncoding=UTF-8";　　//在database 后面加上?characterEncoding=UTF-8 就可以解决java 插入数据中文乱码问题
    public static String username = "user";
    public static String password = "123";
    public static Connection conn;
    public static Statement stmt;
    public static ResultSet rs;
    public static DataStructure ds = new DataStructure();

    /*public Connection getConnection() {
        try {
            Class.forName("com.mysql.jdbc.Driver");
        } catch (ClassNotFoundException e1) {
            e1.printStackTrace();
        }

        try {
            conn = DriverManager
                    .getConnection("jdbc:mysql://ip/databases?user=user&password=pass&useUnicode=true&characterEncoding=utf-8");
            conn = DriverManager.getConnection(url, username, password);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return conn;

    }*/

    public void closeConnection(Connection conn) {

        if (conn != null) {
            try {
                conn.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
    }
/*
    // 实现查询操作
    public static void select(String sql) {
        try {
            rs = stmt.executeQuery(sql);
            ResultSetMetaData meta_data = rs.getMetaData();// 列名
            for (int i_col = 1; i_col <= meta_data.getColumnCount(); i_col++) {
                System.out.print(meta_data.getColumnLabel(i_col) + "   ");
            }
            System.out.println();
            while (rs.next()) {
                for (int i_col = 1; i_col <= meta_data.getColumnCount(); i_col++) {
                    System.out.print(rs.getString(i_col) + "  ");
                }
                System.out.println();
            }
            rs.close();
        } catch (Exception e) {
            System.out.println("数据查询失败!");
        }
    }*/

    public static void insertd(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);
            stmt.executeUpdate(sql);
            conn.commit();
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }

    public static void main(String[] args) {
        String sql = ("insert into bns_user (userurl, titleurl, createtime, username, titleabout ) values (‘12‘,‘1‘,‘1‘,‘1‘,‘1‘)");
        insertd(sql);

    }