From Blob to Image | Together Java | Page 1

hoary linden · 2024-01-09T14:30:28.126Z

Hello. I'm stated learning java not too long ago by watching youtube video and asking my friends.However, i'm now stuck in this spring mvc project. The PROBLEM is that i cant get blob image from Mysql databse to display on JSP. Do i need to convert the Blob to something else? I use Bean,DAO,DTO,Controller,Mapper and Jsp.I still dont know how to use spring boot.My IDE is eclipse.

<@&1004656351647117403> please have a look, thanks.

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ob data from the database and display it as an image in my Spring MVC project.

To solve this problem, you can follow these steps:

First, make sure you have a database table column that stores the blob data. For example, you can have a column named "image" of type BLOB.
In your Spring MVC project, create a model class that represents the entity with the blob data. Make sure to include a field of type byte[] to store the blob data.
Create a DAO (Data Access Object) class that handles the database operations for retrieving the blob data. Use JDBC or any other ORM framework like Hibernate to interact with the database.
In your controller class, create a method that retrieves the blob data from the database using the DAO class and returns it as a ResponseEntity with appropriate headers set for image content type.

Here's an example code snippet for your controller method:

@GetMapping("/image/{id}")
public ResponseEntity<byte[]> getImage(@PathVariable("id") int id) {
    // Retrieve blob data from database using DAO class
    byte[] imageData = dao.getImageData(id);

    // Set headers for image content type
    HttpHeaders headers = new HttpHeaders();
    headers.setContentType(MediaType.IMAGE_JPEG);

    // Return ResponseEntity with image data and headers
    return new ResponseEntity<>(imageData, headers, HttpStatus.OK);
}

Finally, in your view template (JSP/Thymeleaf/HTML), use an <img> tag with the appropriate URL to display the image. For example:

<img src="/image/1" alt="Image">

Make sure to replace "1" with the actual ID of the image you want to display.

By following these steps, you should be able to retrieve blob data from the database and display it as an image in your Spring MVC project.

#From Blob to Image