如何使用 Spring Boot 返回图像

Question

I am new to Spring boot. I am designing a system using Spring boot, it's a Restful API. I want to display images that the user has uploaded. I am storing the files in a subfolder "fotos/x" inside resources. I instinctively tried to access it by typing

  http://localhost:8080/fotos/76/miniaturas/casa-venda-2-dormitorios-franca-sao-paulo_1.jpg

Holping that Tomcat would serve the image for me but it didn't.

So I went on and tried to build an endpoint, I've encountered an snippet

       @GetMapping(value = "/image")
public @ResponseBody byte[] getImage() throws IOException {

    InputStream in = null;
    try{
    in = getClass()
      .getResourceAsStream("/fotos/76/miniaturas/casa-venda-2-dormitorios-franca-sao-paulo_1.jpg");
    }catch(Exception ex){

        System.out.println(ex.getMessage());
    }
    return IOUtils.toByteArray(in);  //toByteArray doesn't exist.
}


}

Answer 1

I found some code that helped me.

@GetMapping(value = "/imagens/{dir}/{img}", produces = MediaType.IMAGE_JPEG_VALUE)
public @ResponseBody byte[] getImage(@PathVariable String dir, @PathVariable String img) throws IOException {


     byte[] bytes = Files.readAllBytes(Paths.get("/var/www/back_imoveis/back_imoveis/imoveis/src/main/resources/public/fotos/" + dir + "/miniaturas/" + img));

     return bytes;


}