Framework & Platform/Spring

spring - 이미지 파일 다운로드(image download)

linuxism 2013. 6. 19. 23:16


Spring MVC: How to return image in @ResponseBody?



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10

I'm getting image data (as byte[]) from DB. How to return this image in @ResponseBody ?

EDIT

I did it without @ResponseBody using HttpServletResponse as method parameter:

@RequestMapping("/photo1")
public void photo(HttpServletResponse response) throws IOException {
    response.setContentType("image/jpeg");
    InputStream in = servletContext.getResourceAsStream("/images/no_image.jpg");
    IOUtils.copy(in, response.getOutputStream());
}

Using @ResponseBody with registeredorg.springframework.http.converter.ByteArrayHttpMessageConverter converter as @Sid said doesn't work for me :(.

@ResponseBody
@RequestMapping("/photo2")
public byte[] testphoto() throws IOException {
    InputStream in = servletContext.getResourceAsStream("/images/no_image.jpg");
    return IOUtils.toByteArray(in);
}
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up vote6down vote

In addition to registering a registerByteArrayHttpMessageConverter, you may want to use a ResponseEntity instead of @ResponseBody. The following code works for me :

@RequestMapping("/photo2")
public ResponseEntity<byte[]> testphoto() throws IOException {
    InputStream in = servletContext.getResourceAsStream("/images/no_image.jpg");

    final HttpHeaders headers = new HttpHeaders();
    headers.setContentType(MediaType.IMAGE_PNG);

    return new ResponseEntity<byte[]>(IOUtils.toByteArray(in), headers, HttpStatus.CREATED);
}
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up vote4down vote

In your application context declare a AnnotationMethodHandlerAdapter and registerByteArrayHttpMessageConverter:

<bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
  <property name="messageConverters">
    <util:list>
      <bean id="byteArrayMessageConverter" class="org.springframework.http.converter.ByteArrayHttpMessageConverter"/>
    </util:list>
  </property>
</bean>

also in the handler method set appropriate content type for your response.

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It doesn't work for me. Details above. – marioosh Jun 6 '11 at 11:37
It doesn't work for me – jsf Oct 25 '12 at 17:02
@jsinghfoss refer to the top answer. – Peymankh Oct 26 '12 at 13:28
up vote2down vote

By using Spring 3.1.x and 3.2.x, this is how you should do it:

The controller method:

@RequestMapping("/photo2")
public @ResponseBody byte[] testphoto() throws IOException {
    InputStream in = servletContext.getResourceAsStream("/images/no_image.jpg");
    return IOUtils.toByteArray(in);
}

And the mvc annotation in servlet-context.xml file:

<mvc:annotation-driven>
    <mvc:message-converters>
        <bean class="org.springframework.http.converter.ByteArrayHttpMessageConverter">
            <property name="supportedMediaTypes">
                <list>
                    <value>image/jpeg</value>
                    <value>image/png</value>
                </list>
            </property>
        </bean>
    </mvc:message-converters>
</mvc:annotation-driven>
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up vote0down vote

if you are using Spring version of 3.1 or newer you can specify "produces" in @RequestMappingannotation. Example below works for me out of box. No need of register converter or anything else if you have web mvc enabled (@EnableWebMvc).

@ResponseBody
@RequestMapping("/photo2", method = RequestMethod.GET, produces = MediaType.IMAGE_JPEG_VALUE)
public byte[] testphoto() throws IOException {
    InputStream in = servletContext.getResourceAsStream("/images/no_image.jpg");
    return IOUtils.toByteArray(in);
}
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출처 - http://stackoverflow.com/questions/5690228/spring-mvc-how-to-return-image-in-responsebody





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