如何在java (或groovy)中从postgres-db读取bytea格式的二进制数据并保存为jpeg-file？

import java.io.FileOutputStream;
import java.io.IOException;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

String url = "jdbc:postgresql://localhost:5432/your_database_name";
String user = "your_username";
String password = "your_password";

try {
    Connection conn = DriverManager.getConnection(url, user, password);
    // 这里假设数据库连接成功
} catch (SQLException e) {
    e.printStackTrace();
}

String sql = "SELECT image_column FROM your_table WHERE id = ?";

try {
    PreparedStatement pstmt = conn.prepareStatement(sql);
    pstmt.setInt(1, your_id);

    ResultSet rs = pstmt.executeQuery();
    // 这里假设查询成功
} catch (SQLException e) {
    e.printStackTrace();
}

try {
    if (rs.next()) {
        byte[] imageData = rs.getBytes(1);
        
        FileOutputStream fos = new FileOutputStream("path/to/save/image.jpg");
        fos.write(imageData);
        fos.close();
        // 保存成功
    }
} catch (IOException e) {
    e.printStackTrace();
}