I am trying to write an API for uploading and downloading files. After I uploaded a test file, it was not shown on cyberduck, but I can download the test file that I just uploaded.
Then I try to download the file that exist on cyberduck, but it shows
com.emc.object.s3.S3Exception: The specified key does not exist.
API code:
StorageImpl.java
#Service
public class StorageImpl implements Storage {
private static Logger logger = LoggerFactory.getLogger(Storage.class);
#Value("${storage.file.repository}")
private String fileRepository;
#Value("${object.storage.user}")
private String oUser;
#Value("${object.storage.endpoint}")
private String endpoint;
#Value("${object.storage.bucket}")
private String nBucket;
#Value("${object.storage.key.secret}")
private String nSecret;
#Value("${object.storage.region.name}")
private String nRegion;
private S3Client s3client;
public StorageImpl() {
}
#Inject
void init() {
try {
s3client = this.getS3Client();
} catch (Exception e) {
e.printStackTrace();
}
}
private S3Client getS3Client() {
if (s3client == null) {
try {
SSLContext sc = SSLContext.getInstance("TLSv1.2");
sc.init(null, null, new java.security.SecureRandom());
HttpsURLConnection.setDefaultSSLSocketFactory(new PreferredCipherSuiteSSLSocketFactory(sc.getSocketFactory()));
String hostname = "";
URI uri = null;
try {
uri = new URI(endpoint);
hostname = uri.getHost();
} catch (URISyntaxException e) {
logger.error("URL " + endpoint + " is a malformed URL");
e.printStackTrace();
}
S3Config config = null;
config = new S3Config(new URI(endpoint)).withUseVHost(false);
logger.debug("oUser=" + oUser + ", secret=" + nSecret + ", endpoint=" + endpoint);
config.withIdentity(oUser).withSecretKey(nSecret);
logger.debug("");
config.setSignMetadataSearch(true);
s3client = new S3JerseyClient(config, new URLConnectionClientHandler());
logger.debug("s3client initiated. endpoint: " + endpoint);
} catch (Exception ex) {
logger.error(ex.getMessage(), ex);
}
}
return s3client;
}
private File convertMultiPartFileToFile(final MultipartFile multipartFile) {
final File file = new File(multipartFile.getOriginalFilename());
try (final FileOutputStream outputStream = new FileOutputStream(file)) {
outputStream.write(multipartFile.getBytes());
} catch (IOException e) {
logger.error("Error {} occurred while converting the multipart file", e.getLocalizedMessage());
}
return file;
}
#Override
public void save(final MultipartFile multipartFile) {
try {
final File file = convertMultiPartFileToFile(multipartFile);
logger.info("Uploading file with name {}", file.getName());
final PutObjectRequest putObjectRequest = new PutObjectRequest(nBucket, file.getName(), file);
s3client.putObject(putObjectRequest);
Files.delete(file.toPath()); // Remove the file locally created in the project folder
} catch (AmazonServiceException e) {
logger.error("Error {} occurred while uploading file", e.getLocalizedMessage());
} catch (IOException ex) {
logger.error("Error {} occurred while deleting temporary file", ex.getLocalizedMessage());
}catch(S3Exception ae){
ae.printStackTrace();
logger.error("", ae);
}
}
#Override
public InputStream retrieve(String fileName) {
return s3client.getObject(nBucket, fileName).getObject();
}
}
FileController.java
#RestController
#RequestMapping("/files")
#CrossOrigin(origins = "*", maxAge = 3600)
public class FileController {
private static final String MESSAGE_1 = "Uploaded the file successfully";
private static final String FILE_NAME = "fileName";
#Autowired
protected StorageImpl storageImpl;
#Autowired
protected FileService fileService;
#GetMapping
public ResponseEntity<Object> findByName(#RequestParam("fileName") String fileName) {
return ResponseEntity
.ok()
.cacheControl(CacheControl.noCache())
.header("Content-type", "application/octet-stream")
.header("Content-disposition", "attachment; filename=\"" + fileName + "\"")
.body(new InputStreamResource(storageImpl.retrieve(fileName)));
}
#PostMapping
public ResponseEntity<Object> save(#RequestParam("file") MultipartFile multipartFile) {
storageImpl.save(multipartFile);
return new ResponseEntity<>(MESSAGE_1, HttpStatus.OK);
}
}
What are the possible reasons causing this bug?
In the edit section, I wrote how to make it upload the image
Thank you very much
#PostMapping("/save")
public String add(#ModelAttribute("category") Category category, RedirectAttributes ra,
#RequestParam("fileImage") MultipartFile multipartFile) throws IOException {
String fileName = StringUtils.cleanPath(multipartFile.getOriginalFilename());
category.setPhoto(fileName);
Category saveCategory = categoryService.save(category);
String uploadDir = "./category-logos/" + saveCategory.getId();
Path uploadPath = Paths.get(uploadDir);
if (!Files.exists(uploadPath)) {
Files.createDirectories(uploadPath);
}
try (InputStream inputStream = multipartFile.getInputStream()) {
Path filePath = uploadPath.resolve(fileName);
Files.copy(inputStream, filePath, StandardCopyOption.REPLACE_EXISTING);
} catch (IOException e) {
throw new IOException("could not save upload file: " + fileName);
}
return "redirect:/category/list";
}
#GetMapping("/edit/{id}")
public String edit(Model model, #PathVariable(name="id")Long id) {
//`**`**`**enter code here**`**`**`
}
Shall I remove this from application.properties
spring.http.multipart.enabled=true
What should be my approach towards this file upload without using multipart?
This way, I'm able to uploading file using where I'm using multipart.
#RequestMapping(value = "/dog/create/{name}", method = RequestMethod.POST)
public JsonNode dogCreation(HttpServletRequest httpRequest, #RequestParam(value = "picture", required = false) MultipartFile multipartFile,
#PathVariable("name") String name) throws IOException, InterruptedException {
JSONObject response = new JSONObject();
Dog dog = new Dog();
String DOG_IMAGES_BASE_LOCATION = "resource\\images\\dogImages";
try {
File file = new File(DOG_IMAGES_BASE_LOCATION);
if (!file.exists()) {
file.mkdirs();
}
} catch (Exception e) {
e.printStackTrace();
}
dog = dogService.getDogByName(name);
if (dog == null) {
if (!multipartFile.isEmpty()) {
String multipartFileName = multipartFile.getOriginalFilename();
String format = multipartFileName.substring(multipartFileName.lastIndexOf("."));
try {
Path path = Paths.get(DOG_IMAGES_BASE_LOCATION + "/" + name + format);
byte[] bytes = multipartFile.getBytes();
File file = new File(path.toString());
file.createNewFile();
Files.write(path, bytes);
if (file.length() == 0) {
response = utility.createResponse(500, Keyword.ERROR, "Image upload failed");
} else {
String dbPath = path.toString().replace('\\', '/');
dog = new Dog();
dog.setName(name);
dog.setPicture(dbPath);
dog = dogService.dogCreation(dog);
response = utility.createResponse(200, Keyword.SUCCESS, "Image upload successful");
}
} catch (Exception e) {
e.printStackTrace();
}
}
}
return objectMapper.readTree(response.toString());
}
I want to do it without using multipart, what would you suggest?
This is what I've done till now to solve this
#RequestMapping(value = "/dog/create/{name}", method = RequestMethod.POST)
public JsonNode dogCreation(HttpServletRequest httpRequest, #RequestParam("picture") String picture,
#PathVariable("name") String name) throws IOException, InterruptedException {
JSONObject response = new JSONObject();
Dog dog = new Dog();
String DOG_IMAGES_BASE_LOCATION = "resource\\images\\dogImages";
try {
File file = new File(DOG_IMAGES_BASE_LOCATION);
if (!file.exists()) {
file.mkdirs();
}
} catch (Exception e) {
e.printStackTrace();
}
dog = dogService.getDogByName(name);
if (dog == null) {
if (!picture.isEmpty()) {
String dogPicture = picture;
byte[] encodedDogPicture = Base64.encodeBase64(dogPicture.getBytes());
String format = dogPicture.substring(picture.lastIndexOf("."));
try {
} catch (Exception e) {
e.printStackTrace();
}
}
}
return objectMapper.readTree(response.toString());
}
I just have to say that this should probably only be used as a workaround.
On your frontend, convert the file to base64 in js:
const reader = new FileReader();
reader.readAsDataURL(file);
reader.onload = function(evt) {
console.log(evt.target.result);
//do POST here - something like this:
$.ajax("/upload64", {
method: "POST",
contentType: "application/text"
data: evt.target.result
}
};
On the server with an example of a decoder - more decoding options here Decode Base64 data in Java
import sun.misc.BASE64Decoder;
#PostMapping("/upload64")
public String uploadBase64(#RequestBody String payload){
BASE64Decoder decoder = new BASE64Decoder();
byte[] decodedBytes = decoder.decodeBuffer(encodedBytes);
//use your bytes
}
I am trying to display array data using JSON Volley in PostsBasedOnCategory.java. Array data that I want to display are, Title post, and excerpt based on specific category from https://www.kisahmuslim.com/wp-json/wp/v2/categories. But unfortunately, it only showing one result.
Below you can check my code
DaftarCategories.java
public class CallingPage extends AsyncTask<String, String, String> {
HttpURLConnection conn;
java.net.URL url = null;
private int page = 1;
#Override
protected void onPreExecute() {
super.onPreExecute();
//this method will be running on UI thread
showNoFav(false);
pb.setVisibility(View.VISIBLE);
}
#Override
protected String doInBackground(String... params) {
try {
url = new URL("https://www.kisahmuslim.com/wp-json/wp/v2/categories");
}
catch(MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
return e.toString();
}
try {
// Setup HttpURLConnection class to send and receive data from php and mysql
conn = (HttpURLConnection) url.openConnection();
conn.setReadTimeout(READ_TIMEOUT);
conn.setConnectTimeout(CONNECTION_TIMEOUT);
conn.setRequestMethod("GET");
// setDoOutput to true as we recieve data from json file
conn.setDoOutput(true);
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
return e1.toString();
}
try {
int response_code = conn.getResponseCode();
// Check if successful connection made
if (response_code == HttpURLConnection.HTTP_OK) {
// Read data sent from server
InputStream input = conn.getInputStream();
BufferedReader reader = new BufferedReader(new InputStreamReader(input));
StringBuilder result = new StringBuilder();
String line;
while ((line = reader.readLine()) != null) {
result.append(line);
}
// Pass data to onPostExecute method
return (result.toString());
} else {
return("koneksi gagal");
}
} catch (IOException e) {
e.printStackTrace();
return e.toString();
} finally {
conn.disconnect();
}
}
protected void onPostExecute(String result)
{
JsonArrayRequest stringRequest = new JsonArrayRequest(Request.Method.GET, SumberPosts.HOST_URL+"wp/v2/categories/", null, new Response.Listener<JSONArray>()
{
#Override
public void onResponse(JSONArray response) {
// display response
Log.d(TAG, response.toString() + "Size: "+response.length());
// agar setiap kali direfresh data tidak redundant
typeForPosts.clear();
for(int i=0; i<response.length(); i++) { //ambil semua objek yang ada
final CategoriesModel post = new CategoriesModel();
try {
Log.d(TAG, "Object at " + i + response.get(i));
JSONObject obj = response.getJSONObject(i);
post.setId(obj.getInt("id"));
post.setPostURL(obj.getString("link"));
//Get category name
post.setCategory(obj.getString("name"));
//////////////////////////////////////////////////////////////////////////////////////
// getting article konten
JSONObject postCategoryParent = obj.getJSONObject("_links");
JSONArray postCategoryObj = postCategoryParent.getJSONArray("wp:post_type");
JSONObject postCategoryIndex = postCategoryObj.getJSONObject(0); //ambil satu objek saja
String postCategoryUrl = postCategoryIndex.getString("href"); //satu objek yang dimaksud adalah href
if(postCategoryUrl != null) {
Log.d(TAG, postCategoryIndex.getString("href"));
JsonArrayRequest getKonten = new JsonArrayRequest(Request.Method.GET, postCategoryUrl, null, new Response.Listener<JSONArray>()
{
#Override
public void onResponse(JSONArray respon) {
Log.d(TAG, respon.toString() + "Size: "+respon.length());
for(int d=0; d<respon.length(); d++) {
try {
//Log.d(TAG, "Object at " + i + respon.get());
JSONObject objek = respon.getJSONObject(d); //ambil semua artikel yang tersedia di postCategoryUrl
post.setId(objek.getInt("id"));
post.setCreatedAt(objek.getString("date"));
post.setPostURL(objek.getString("link"));
//Get category title
JSONObject titleObj = objek.getJSONObject("title");
post.setJudul(titleObj.getString("rendered"));
//Get excerpt
JSONObject exerptObj = objek.getJSONObject("excerpt");
post.setExcerpt(exerptObj.getString("rendered"));
// Get content
JSONObject contentObj = objek.getJSONObject("content");
post.setContent(contentObj.getString("rendered"));
}
catch (JSONException e) {
e.printStackTrace();
}
}// for category
} //onResponse2
}, new Response.ErrorListener() { //getKonten
#Override
public void onErrorResponse(VolleyError error) {
pb.setVisibility(View.GONE);
Log.d(TAG, error.toString());
}
});
queue.add(getKonten);
} //if postCategoryUrl
//////////////////////////////////////////////////////////////////////////////////////
typeForPosts.add(post);
} //try 1
catch (JSONException e) {
e.printStackTrace();
}
} //for 1
pb.setVisibility(View.GONE);
recycleViewWordPress.setAdapter(mAdapter);
mAdapter.notifyDataSetChanged();
} //onResponse1
}, new Response.ErrorListener() { //stringRequest
#Override
public void onErrorResponse(VolleyError error) {
showNoFav(true);
pb.setVisibility(View.GONE);
Log.e(TAG, "Error: " + error.getMessage());
Toast.makeText(getContext(), "Tidak bisa menampilkan data. Periksa kembali sambungan internet Anda", Toast.LENGTH_LONG).show();
}
});
// Add the request to the RequestQueue.
queue.add(stringRequest);
} //onPostExecute
} //CallingPage
#Override
public void onPostingSelected(int pos) {
CategoriesModel click = typeForPosts.get(pos);
excerpt = click.getExcerpt();
//gambar = click.getPostImg();
judul = click.getJudul();
//url = click.getPostURL();
content = click.getContent();
Bundle bundle = new Bundle();
bundle.putString("judul", judul);
//bundle.putString("gambar", gambar);
//bundle.putString("url", url);
bundle.putString("content", content);
bundle.putString("excerpt", excerpt);
PostsBasedOnCategory bookFragment = new PostsBasedOnCategory();
bookFragment.setArguments(bundle);
AppCompatActivity activity = (AppCompatActivity) getContext();
activity.getSupportFragmentManager().beginTransaction().replace(R.id.flContainerFragment, bookFragment).addToBackStack(null).commit();
}
PostsBasedOnCategory.java
#Nullable
#Override
public View onCreateView(LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.activity_wordpress, container,false);
ButterKnife.bind(this,view);
setHasOptionsMenu(true);
return view;
}
#Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
swipeRefreshLayout =(SwipeRefreshLayout) getActivity().findViewById(R.id.swipeRefreshLayout);
recycleViewWordPress =(RecyclerView) getActivity().findViewById(R.id.recycleViewWordPress);
pb = (ProgressBar) getActivity().findViewById(R.id.loadingPanel);
noFavtsTV = getActivity().findViewById(R.id.no_favt_text);
swipeRefreshLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
#Override
public void onRefresh() {
swipeRefreshLayout.setRefreshing(false);
pb.setVisibility(View.VISIBLE);
recycleViewWordPress.setAdapter(mAdapter);
}
});
typeForPosts = new ArrayList<CategoriesModel>();
recycleViewWordPress.setHasFixedSize(true);
recycleViewWordPress.setLayoutManager(new LinearLayoutManager(getContext()));
recycleViewWordPress.setNestedScrollingEnabled(false);
mAdapter = new AdapterCategoryPosts(getContext(), typeForPosts, this);
recycleViewWordPress.setAdapter(mAdapter);
mAdapter.notifyDataSetChanged();
loadData();
}
public void loadData() {
Bundle bundel = this.getArguments();
long id = bundel.getLong("id");
String kategori = bundel.getString("kategori");
String title = bundel.getString("judul");
String excerpt = bundel.getString("excerpt");
String pict = bundel.getString("gambar");
String url = bundel.getString("url");
String konten = bundel.getString("konten");
CategoriesModel list = new CategoriesModel();
list.setId(id);
list.setCategory(kategori);
list.setJudul(title);
list.setExcerpt(excerpt);
list.setPostImg(pict);
list.setPostURL(url);
list.setContent(konten);
typeForPosts.add(list);
}
Logcat
2019-09-07 12:01:27.941 11246-11246/com.kursusarabic.arabicforfun D/postFrag: [{"id":12,"count":53,"description":"","link":"https:\/\/kisahmuslim.com\/category\/kisah-nyata\/biografi-ulama","name":"Biografi Ulama","slug":"biografi-ulama","taxonomy":"category","parent":29,"meta":[],"_links":{"self":[{"href":"https:\/\/kisahmuslim.com\/wp-json\/wp\/v2\/categories\/12"}],"collection":[{"href":"https:\/\/kisahmuslim.com\/wp-json\/wp\/v2\/categories"}],"about":[{"href":"https:\/\/kisahmuslim.com\/wp-json\/wp\/v2\/taxonomies\/category"}],"up":[{"embeddable":true,"href":"https:\/\/kisahmuslim.com\/wp-json\/wp\/v2\/categories\/29"}],"wp:post_type":[{"href":"https:\/\/kisahmuslim.com\/wp-json\/wp\/v2\/posts?categories=12"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}},{"id":26,"count":8,"description":"","link":"https:\/\/kisahmuslim.com\/category\/download","name":"Download","slug":"download","taxonomy":"category","parent":0,"meta":[],"_links":{"self":[{"href":"https:\/\/kisahmuslim.com\/wp-json\/wp\/v2\/categories\/26"}],"collection":[{"href":"https:\/\/kisahmuslim.com\/wp-json\/wp\/v2\/categories"}],"about":[{"href":"https:\/\/kisahmuslim.com\/wp-json\/wp\/v2\/taxonomies\/category"}],"wp:post_type":[{"href":"https:\/\/kisahmuslim.com\/wp-json\/wp\/v2\/posts?categories=26"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}},{"id":1812,"count":9,"description":"","link":"https:\/\/kisahmuslim.com\/category\/info","name":"Info","slug":"info","taxonomy":"category","parent":0,"meta":[],"_links":{"self":[{"href":"https:\/\/kisahmuslim.com\/wp-json\/wp\/v2\/categories\/1812"}],"collection":[{"href":"https:\/\/kisahmuslim.com\/wp-json\/wp\/v2\/categories"}],"about":[{"href":"https:\/\/kisahmuslim.com\/wp-json\/wp\/v2\/taxonomies\/category"}],"wp:post_type":[{"href":"https:\/\/kisahmuslim.com\/wp-json\/wp\/v2\/posts?categories=1812"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}},{"id":17,"count":3,"description":"","link":"https:\/\/kisahmuslim.com\/category\/kisah-nyata\/kisah-birrul-walidain","name":"Kisah Birrul Walidain","slug":"kisah-birrul-walidain","taxonomy":"category","parent":29,"meta":[],"_links":{"self":[{"href":"https:\/\/kisahmuslim.com\/wp-json\/wp\/v2\/categories\/17"}],"collection":[{"href":"https:\/\/kisahmuslim.com\/wp-json\/wp\/v2\/categories"}],"about":[{"href":"https:\/\/kisahmuslim.com\/wp-json\/wp\/v2\/taxonomies\/category"}],"up":[{"embeddable":true,"href":"https:\/\/kisahmuslim.com\/wp-json\/wp\/v2\/categories\/29"}],"wp:post_type":[{"href":"https:\/\/kisahmuslim.com\/wp-json\/wp\/v2\/posts?categories=17"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}},{"id":25,"count":31,"description":"","link":"https:\/\/kisahmuslim.com\/category\/kisah-nyata\/kisah-hidayah-islam","name":"Kisah Hidayah Islam","slug":"kisah-hidayah-islam","taxonomy":"category","parent":29,"meta":[],"_links":{"self":[{"href":"https:\/\/kisahmuslim.com\/wp-json\/wp\/v2\/categories\/25"}],"collection":[{"href":"https:\/\/kisahmuslim.com\/wp-json\/wp\/v2\/categories"}],"about":[{"href":"https:\/\/kisahmuslim.com\/wp-json\/wp\/v2\/taxonomies\/category"}],"up":[{"embeddable":true,"href":"https:\/\/kisahmuslim.com\/wp-json\/wp\/v2\/categories\/29"}],"wp:post_type":[{"href":"https:\/\/kisahmuslim.com\/wp-json\/wp\/v2\/posts?categories=25"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}},{"id":16,"count":49,"description":"","link":"https:\/\/kisahmuslim.com\/category\/kisah-nyata\/kisah-kaum-durhaka","name":"Kisah Kaum Durhaka","slug":"kisah-kaum-durhaka","taxonomy":"category","parent":29,"meta":[],"_links":{"self":[{"href":"https:\/\/kisahmuslim.com\/wp-json\/wp\/v2\/categories\/16"}],"collection":[{"href":"https:\/\/kisahmuslim.com\/wp-json\/wp\/v2\/categories"}],"about":[{"href":"https:\/\/kisahmuslim.com\/wp-json\/wp\/v2\/taxonomies\/category"}],"up":[{"embeddable":true,"href":"https:\/\/kisahmuslim.com\/wp-json\/wp\/v2\/categories\/29"}],"wp:post_type":[{"href":"https:\/\/kisahmuslim.com\/wp-json\/wp\/v2\/posts?categories=1
2019-09-07 12:01:27.942 11246-11246/com.kursusarabic.arabicforfun D/postFrag: Object at 0{"id":12,"count":53,"description":"","link":"https:\/\/kisahmuslim.com\/category\/kisah-nyata\/biografi-ulama","name":"Biografi Ulama","slug":"biografi-ulama","taxonomy":"category","parent":29,"meta":[],"_links":{"self":[{"href":"https:\/\/kisahmuslim.com\/wp-json\/wp\/v2\/categories\/12"}],"collection":[{"href":"https:\/\/kisahmuslim.com\/wp-json\/wp\/v2\/categories"}],"about":[{"href":"https:\/\/kisahmuslim.com\/wp-json\/wp\/v2\/taxonomies\/category"}],"up":[{"embeddable":true,"href":"https:\/\/kisahmuslim.com\/wp-json\/wp\/v2\/categories\/29"}],"wp:post_type":[{"href":"https:\/\/kisahmuslim.com\/wp-json\/wp\/v2\/posts?categories=12"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
2019-09-07 12:01:27.942 11246-11246/com.kursusarabic.arabicforfun D/postFrag: https://kisahmuslim.com/wp-json/wp/v2/posts?categories=12
You cannot call network requests in loop, Use async processing or
Retrofit & RxJava multiple requests complete
and after updating typeForPosts, there is no need to setAdapter on recyclerview just call adapter.notifyDataSetChanged()
I have this below code for downloading CSV as an ajax button click, But the file is not downloading. Only showing the black new tab on the browser.
#RequestMapping(value = "/batch/download", method = RequestMethod.POST, produces = "text/csv")
#ResponseBody
public void downloadNGIBatchSelected(HttpServletResponse response) throws IOException {
List<String> ids = Arrays.asList("1312321","312313");
generateNewCustomerCSV(response.getWriter(),ids);
}
private void generateNewCustomerCSV(PrintWriter writer, List<String> ids){
String NEW_LINE_SEPARATOR = "\n";
//CSV file header
Object[] FILE_HEADER = {"Token Number",
"Token Expiry Date",
};
CSVPrinter csvPrinter = null;
try {
csvPrinter = new CSVPrinter(new BufferedWriter(writer), CSVFormat.DEFAULT.withRecordSeparator(NEW_LINE_SEPARATOR));
//Create CSV file header
csvPrinter.printRecord(FILE_HEADER);
for (PolicyMap PolicyMap : policyMaps) {
List customerCSV = new ArrayList();
customerCSV.add(PolicyMap.getInsurancePolicy().getTokenNo());
try {
csvPrinter.printRecord(customerCSV);
} catch (IOException e) {
e.printStackTrace();
}
}
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
writer.flush();
writer.close();
csvPrinter.close();
} catch (IOException e) {
System.out.println("Error while flushing/closing fileWriter/csvPrinter !!!");
e.printStackTrace();
}
}
}
You have set the content type in #RequestMapping annotation. But it is not going to work in the case when response is being written using HttpServletResponse. In this case, instead of spring, HttpServletResponse is writing the response that's why you have to set the response type in the response before getting the writer.
response.setContentType ("application/csv");
response.setHeader ("Content-Disposition", "attachment; filename=\"nishith.csv\"");