如何在jsp中使用HeidiSQL BLOB(十六进制代码

<%@ page import="java.sql.*" %>
<%@ page import="java.io.*" %>

<%
    Connection conn = null;
    try {
        Class.forName("com.mysql.jdbc.Driver");
        String url = "jdbc:mysql://localhost:3306/your_database_name";
        String username = "your_username";
        String password = "your_password";
        conn = DriverManager.getConnection(url, username, password);
    } catch (Exception e) {
        e.printStackTrace();
    }
%>

<%
    PreparedStatement pstmt = null;
    ResultSet rs = null;
    try {
        String sql = "SELECT blob_column FROM your_table_name WHERE id = ?";
        pstmt = conn.prepareStatement(sql);
        pstmt.setInt(1, your_id);
        rs = pstmt.executeQuery();
        if (rs.next()) {
            Blob blob = rs.getBlob("blob_column");
            InputStream inputStream = blob.getBinaryStream();
            byte[] bytes = new byte[(int) blob.length()];
            inputStream.read(bytes);
            String hexString = javax.xml.bind.DatatypeConverter.printHexBinary(bytes);
            out.println(hexString);
        }
    } catch (Exception e) {
        e.printStackTrace();
    } finally {
        try {
            if (rs != null) rs.close();
            if (pstmt != null) pstmt.close();
            if (conn != null) conn.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
%>