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image-download - adding jsp and plain copy to response method

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Slavisa Baeldung
2016-05-10 13:55:44 +02:00
parent a58a896ac8
commit a72def9d89
4 changed files with 67 additions and 34 deletions
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70
spring-mvc-xml/src/main/java/com/baeldung/spring/controller/ImageController.java
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@@ -1,54 +1,64 @@
package com.baeldung.spring.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.core.io.DefaultResourceLoader;
import org.springframework.core.io.Resource;
import org.springframework.core.io.ResourceLoader;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpStatus;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
import org.springframework.http.*;
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;
import org.springframework.web.context.support.ServletContextResourceLoader;
import org.springframework.web.context.support.ServletContextResource;
import javax.servlet.ServletContext;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.util.concurrent.TimeUnit;
@Controller
public class ImageController {
@Autowired
ServletContext servletContext;
private ServletContext servletContext;
@RequestMapping(value = "/image-response-entity", method = RequestMethod.GET)
public ResponseEntity<byte[]> getImageAsREsponseEntity() throws IOException {
final InputStream in = servletContext.getResourceAsStream("/WEB-INF/images/image-example.jpg");
byte[] media = IOUtils.toByteArray(in);
final HttpHeaders headers = new HttpHeaders();
headers.setContentType(MediaType.IMAGE_JPEG);
return new ResponseEntity<byte[]>(media, headers, HttpStatus.OK);
@RequestMapping(value = "/image-view", method = RequestMethod.GET)
public String imageView() throws IOException {
return "image-download";
}
@RequestMapping(value = "/image-byte-array", method = RequestMethod.GET, produces = MediaType.IMAGE_JPEG_VALUE)
public @ResponseBody byte[] getImageAsByteArray() throws IOException {
@RequestMapping(value = "/image-manual-response", method = RequestMethod.GET)
public void getImageAsByteArray(HttpServletResponse response) throws IOException {
final InputStream in = servletContext.getResourceAsStream("/WEB-INF/images/image-example.jpg");
response.setContentType(MediaType.IMAGE_JPEG_VALUE);
IOUtils.copy(in, response.getOutputStream());
}
@RequestMapping(value = "/image-byte-array", method = RequestMethod.GET)
@ResponseBody
public byte[] getImageAsByteArray() throws IOException {
final InputStream in = servletContext.getResourceAsStream("/WEB-INF/images/image-example.jpg");
return IOUtils.toByteArray(in);
}
@RequestMapping(value = "/image-response-entity", method = RequestMethod.GET)
public ResponseEntity<byte[]> getImageAsResponseEntity() {
ResponseEntity<byte[]> responseEntity;
final HttpHeaders headers = new HttpHeaders();
try {
final InputStream in = servletContext.getResourceAsStream("/WEB-INF/images/image-example.jpg");
byte[] media = IOUtils.toByteArray(in);
headers.setCacheControl(CacheControl.noCache().getHeaderValue());
responseEntity = new ResponseEntity<>(media, headers, HttpStatus.OK);
} catch (IOException ioe) {
responseEntity = new ResponseEntity<>(null, headers, HttpStatus.INTERNAL_SERVER_ERROR);
}
return responseEntity;
}
@RequestMapping(value = "/image-resource", method = RequestMethod.GET)
@ResponseBody
@RequestMapping(value = "/image-resource", method = RequestMethod.GET, produces = MediaType.IMAGE_JPEG_VALUE)
public Resource getImageAsResource() {
ResourceLoader resourceLoader = new ServletContextResourceLoader(servletContext);
return resourceLoader.getResource("/WEB-INF/images/image-example.jpg");
return new ServletContextResource(servletContext, "/WEB-INF/images/image-example.jpg");
}
}