java上传图片并存到mysql数据库代码

以下是将图片上传并存储到MySQL数据库的Java代码示例：

import java.io.*;
import java.sql.*;

public class ImageUpload {
   public static void main(String[] args) {
      String url = "jdbc:mysql://localhost:3306/YOURDBNAME";
      String username = "YOURUSERNAME";
      String password = "YOURPASSWORD";

      Connection conn = null;
      PreparedStatement pstmt = null;

      try {
          Class.forName("com.mysql.jdbc.Driver");
          conn = DriverManager.getConnection(url, username, password);

          File image = new File("path/to/image.jpg");
          FileInputStream fis = new FileInputStream(image);

          pstmt = conn.prepareStatement("INSERT INTO images (filename, content) VALUES (?,?)");
          pstmt.setString(1, image.getName());
          pstmt.setBinaryStream(2, fis, (int) image.length());
          pstmt.executeUpdate();

          System.out.println("Image has been uploaded to the database.");

      } catch (Exception e) {
          System.out.println(e.getMessage());
      } finally {
          try {
              if (pstmt != null) pstmt.close();
              if (conn != null) conn.close();
          } catch (SQLException e) {
              System.out.println(e.getMessage());
          }
      }
   }
}

请注意，将占用大量内存的图像文件存储在数据库中可能不是最佳选择，并且会降低数据库性能。在实际应用中，通常更好的解决方案是将图像文件保存到服务器上，并在数据库中存储图像的文件路径。