J'ai besoin de télécharger des images dans mon projet. Comment obtenir le chemin de téléchargement dans SpringMVC. Le chemin est;
/home/cme/project/Eclipse/workspace_12_11/.metadata/.plugins/org.Eclipse.wst.server.core/tmp0/wtpwebapps/fileUploadTester/upload
L'erreur suivante
The method getServletContext() is undefined for the type HomePageController
apparaît lorsque j'utilise ce code;
String uploadPath = getServletContext().getRealPath("") + File.separator + UPLOAD_DIRECTORY;
Mon code est
public ModelAndView UploadPhoto(@ModelAttribute User user, HttpServletRequest request, HttpServletResponse response) throws IOException {
final String UPLOAD_DIRECTORY = "upload";
final int THRESHOLD_SIZE = 1024 * 1024 * 3; // 3MB
final int MAX_FILE_SIZE = 1024 * 1024 * 40; // 40MB
final int MAX_REQUEST_SIZE = 1024 * 1024 * 50; // 50MB
String value[] = new String[10];
int i = 0;
// checks if the request actually contains upload file
if (!ServletFileUpload.isMultipartContent(request)) {
PrintWriter writer = response.getWriter();
writer.println("Request does not contain upload data");
writer.flush();
return; //here is error This method must return a result of type ModelAndView
}
DiskFileItemFactory factory = new DiskFileItemFactory();
factory.setSizeThreshold(THRESHOLD_SIZE);
factory.setRepository(new File(System.getProperty("Java.io.tmpdir")));
ServletFileUpload upload = new ServletFileUpload(factory);
upload.setFileSizeMax(MAX_FILE_SIZE); //here error The method setFileSizeMax(int) is undefined for the type ServletFileUpload
upload.setSizeMax(MAX_REQUEST_SIZE);
String uploadPath = getServletContext().getRealPath("") + File.separator + UPLOAD_DIRECTORY; // here error The method getServletContext() is undefined for the type Homepage Controller
// creates the directory if it does not exist
File uploadDir = new File(uploadPath);
if (!uploadDir.exists()) {
uploadDir.mkdir();
}
try {
List < FileItem > items = upload.parseRequest(request); // request is HttpServletRequest
for (FileItem item: items) {
if (item.isFormField()) { // text fields, etc...
String fieldName = item.getFieldName();
System.out.print("fieldname" + fieldName);
value[i] = item.getString();
System.out.print("from uploader" + value[i]);
i++;
} else {
//String fileName=new File(item.getName()).getName(); Use this to use default file name
String name = value[0];
System.out.println("file uploader name" + name);
String filePath = uploadPath + File.separator + name;
System.out.println(filePath);
File storeFile = new File(filePath);
try {
item.write(storeFile);
} catch (Exception ex) {
}
}
}
System.out.println("uploaded successfully");
} catch (Exception ex) {
System.out.println("error not uploaded");
}
return new ModelAndView("ChangePhoto");
}
Trois erreur
Utilisez le code ci-dessous pour autowire l'objet ServletContext
dans SpringMVC
@Autowired
ServletContext context;
et après cela, essayez d'exécuter votre code comme
String uploadPath = context.getRealPath("") + File.separator + UPLOAD_DIRECTORY;
Vous pouvez l'obtenir dans votre contrôleur comme ceci;
private ServletContext context;
public void setServletContext(ServletContext servletContext) {
this.context = servletContext;
}
mais pour cela votre contrôleur doit implémenter l'interface ServletContextAware
Essaye ça:
@Autowired
ServletContext servletContext;
Ceci est juste une autre alternative
((ServletRequestAttributes) RequestContextHolder.getRequestAttributes ()). GetRequest (). GetServletContext ()
Les paramètres que vous avez transmis ou définis à l'objet ServletContext sont stockés dans l'objet HttpServletRequest. Vous pouvez y accéder n'importe où dans l'application de la manière suivante:
public void method(HttpServletRequest request){
String email=request.getServletContext().getInitParameter(“email”);
}