Added controller for returning image in response body with configuration via java class

This commit is contained in:
Yurii Kostyshyn 2016-04-18 23:17:03 +03:00
parent 4b18d13857
commit 3601821582
3 changed files with 54 additions and 0 deletions

View File

@ -1,9 +1,15 @@
package com.baeldung.spring.web.config;
import java.util.ArrayList;
import java.util.List;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.io.ClassPathResource;
import org.springframework.http.MediaType;
import org.springframework.http.converter.ByteArrayHttpMessageConverter;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.web.multipart.commons.CommonsMultipartResolver;
import org.springframework.web.servlet.ViewResolver;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
@ -69,4 +75,25 @@ public class WebConfig extends WebMvcConfigurerAdapter {
return bean;
}
@Override
public void extendMessageConverters(final List<HttpMessageConverter<?>> converters) {
converters.add(byteArrayHttpMessageConverter());
}
@Bean
public ByteArrayHttpMessageConverter byteArrayHttpMessageConverter() {
final ByteArrayHttpMessageConverter arrayHttpMessageConverter = new ByteArrayHttpMessageConverter();
arrayHttpMessageConverter.setSupportedMediaTypes(getSupportedMediaTypes());
return arrayHttpMessageConverter;
}
private List<MediaType> getSupportedMediaTypes() {
final List<MediaType> list = new ArrayList<MediaType>();
list.add(MediaType.IMAGE_JPEG);
list.add(MediaType.IMAGE_PNG);
list.add(MediaType.APPLICATION_OCTET_STREAM);
return list;
}
}

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@ -0,0 +1,27 @@
package com.baeldung.web.controller;
import java.io.IOException;
import java.io.InputStream;
import javax.servlet.ServletContext;
import org.apache.commons.io.IOUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.MediaType;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;
@Controller
public class ImageController {
@Autowired
ServletContext servletContext;
@RequestMapping(value = "/image-byte-array", method = RequestMethod.GET, produces = MediaType.IMAGE_JPEG_VALUE)
public @ResponseBody byte[] getImageAsByteArray() throws IOException {
final InputStream in = servletContext.getResourceAsStream("/WEB-INF/images/image-example.jpg");
return IOUtils.toByteArray(in);
}
}

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