ImageController.java

package image;

import java.io.IOException;
import java.io.InputStream;

import javax.servlet.http.HttpServletResponse;

import org.apache.commons.io.IOUtils;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.core.io.Resource;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpStatus;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
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 {

	@Value("#{'resources/images/sample.jpg'}")
	private Resource resource;

	@RequestMapping(value = "/image1", method = RequestMethod.GET)
	public void testImage1(HttpServletResponse response) throws IOException {
		InputStream in = resource.getInputStream();

		try {
			response.setContentType("image/jpeg");
			IOUtils.copy(in, response.getOutputStream());
		} finally {
			IOUtils.closeQuietly(in);
		}
	}

	@RequestMapping(value = "/image2", method = RequestMethod.GET)
	@ResponseBody
	public ResponseEntity<byte[]> testImage2() throws IOException {
		InputStream in = resource.getInputStream();

		try {
			HttpHeaders headers = new HttpHeaders();
			headers.setContentType(MediaType.IMAGE_JPEG);

			return new ResponseEntity<byte[]>(IOUtils.toByteArray(in), headers,
					HttpStatus.OK);
		} finally {
			IOUtils.closeQuietly(in);
		}
	}

	@RequestMapping(value = "/image3", method = RequestMethod.GET, produces = MediaType.IMAGE_JPEG_VALUE)
	@ResponseBody
	public byte[] testImage3() throws IOException {
		InputStream in = resource.getInputStream();

		try {
			return IOUtils.toByteArray(in);
		} finally {
			IOUtils.closeQuietly(in);
		}
	}

}