我正在尝试使用 InscriptionForm.java 从注册表单上传图像来检查相应的字段。上传没有问题（感谢BalusC的教程），但是，当我尝试显示上传的图像时，我不能；参考 HTTP 网络监视器，我得到404 错误作为响应。此外，当我尝试在浏览器的地址栏中输入上述链接时，http://localhost:8080/projetForum/images/bd/Id_21082013184506.png我遇到了 404 错误。
InscriptionForm.java
public final class InscriptionForm {
private static final String CHAMP_EMAIL = "email";
private static final String CHAMP_PASS = "motdepasse";
private static final String CHAMP_CONF = "confirmation";
private static final String CHAMP_NOM = "nom";
private static final String CHAMP_DESC = "description";
private static final String CHAMP_LOC = "localisation";
private static final String CHAMP_SW = "siteweb";
public static final String CHAMP_IMAGE = "avatar";
public static final String CHAMP_JOURDENAISS = "jourdenaissance";
public static final String CHAMP_MOISDENAISS = "moisdenaissance";
public static final String CHAMP_ANNEEDENAISS = "anneedenaissance";
public static final String CHAMP_DATEDENAISS = "datedenaissance";
public static final int TAILLE_TAMPON = 10240; // 10 ko
public static final String CHEMIN = "E:\\Bibliothèque logicielle\\workspace\\projetForum\\WebContent\\images\\bd\\";
private String resultat;
private static Map<String, String> erreurs = new HashMap<String, String>();
public String getResultat() {
return resultat;
}
public Map<String, String> getErreurs() {
return erreurs;
}
public Utilisateur inscrireUtilisateur(HttpServletRequest request) {
String email = getValeurChamp(request, CHAMP_EMAIL);
String motDePasse = getValeurChamp(request, CHAMP_PASS);
String confirmation = getValeurChamp(request, CHAMP_CONF);
String nom = getValeurChamp(request, CHAMP_NOM);
String description = getValeurChamp(request, CHAMP_DESC);
String localisation = getValeurChamp(request, CHAMP_LOC);
String siteweb = getValeurChamp(request, CHAMP_SW);
String image = getValeurChamp(request, CHAMP_IMAGE);
String jourdenaissance = getValeurChamp(request, CHAMP_JOURDENAISS);
String moisdenaissance = getValeurChamp(request, CHAMP_MOISDENAISS);
String anneedenaissance = getValeurChamp(request, CHAMP_ANNEEDENAISS);
Integer datedenaissance = null;
try {
validationEmail(email);
} catch (Exception e) {
setErreur(CHAMP_EMAIL, e.getMessage());
}
try {
validationMotsDePasse(motDePasse, confirmation);
} catch (Exception e) {
setErreur(CHAMP_PASS, e.getMessage());
}
try {
validationNom(nom);
} catch (Exception e) {
setErreur(CHAMP_NOM, e.getMessage());
}
try {
image = validationImage(request, CHEMIN);
} catch (Exception e) {
setErreur(CHAMP_IMAGE, e.getMessage());
}
if (!jourdenaissance.equals("defaut")
&& !moisdenaissance.equals("defaut")
&& !anneedenaissance.equals("defaut")) {
try {
validationDateDeNaiss(Integer.parseInt(jourdenaissance),
Integer.parseInt(moisdenaissance),
Integer.parseInt(anneedenaissance));
} catch (Exception e) {
setErreur(CHAMP_DATEDENAISS, e.getMessage());
}
datedenaissance = Integer.parseInt((jourdenaissance + ""
+ moisdenaissance + "" + anneedenaissance));
}
if (jourdenaissance.equals("defaut")
&& moisdenaissance.equals("defaut")
&& anneedenaissance.equals("defaut")) {
} else {
setErreur(CHAMP_DATEDENAISS,
"Merci de vérifier votre date de naissance.");
}
Utilisateur utilisateur = new Utilisateur(email, motDePasse, nom,
localisation, siteweb, description, datedenaissance, image);
if (erreurs.isEmpty()) {
resultat = "Succès de l'inscription.";
createORupdate(utilisateur, request);
} else {
resultat = "Échec de l'inscription.";
}
return utilisateur;
}
private String validationImage(HttpServletRequest request, String chemin)
throws Exception {
File uploadFilePath = new File(chemin);
// Validate file.
Object fileObject = request.getAttribute("avatar");
if (fileObject == null) {
// No file uploaded.
throw new Exception("Please select file to upload.");
} else if (fileObject instanceof FileUploadException) {
// File upload is failed.
FileUploadException fileUploadException = (FileUploadException) fileObject;
throw new Exception(fileUploadException.getMessage());
}
// If there are no errors, proceed with writing file.
FileItem fileItem = (FileItem) fileObject;
// Get file name from uploaded file and trim path from it.
// Some browsers (e.g. IE, Opera) also sends the path, which is
// completely irrelevant.
String fileName = FilenameUtils.getName(fileItem.getName());
// Prepare filename prefix and suffix for an unique filename in upload
// folder.
String prefix = FilenameUtils.getBaseName(fileName) + "_";
String suffix = "." + FilenameUtils.getExtension(fileName);
File file = null;
try {
// Prepare unique local file based on file name of uploaded file.
file = File.createTempFile(prefix, suffix, uploadFilePath);
// Write uploaded file to local file.
fileItem.write(file);
} catch (Exception e) {
// Can be thrown by uniqueFile() and FileItem#write().
throw new Exception(e.getMessage());
}
return file.getName();
}
private void setErreur(String champ, String message) {
erreurs.put(champ, message);
}
private static String getValeurChamp(HttpServletRequest request,
String nomChamp) {
String valeur = request.getParameter(nomChamp);
if (valeur == null || valeur.trim().length() == 0) {
return null;
} else {
return valeur;
}
}
private static void createORupdate(Utilisateur u, HttpServletRequest request) {
Session s = HibernateUtils.getSession();
Transaction tx = s.beginTransaction();
Query q = s
.createQuery("from Utilisateur where Utilisateur_email = :email");
q.setString("email", u.getEmail());
Utilisateur userUpdt = (Utilisateur) q.uniqueResult();
if (userUpdt != null) {
userUpdt.setNom(u.getNom());
userUpdt.setEmail(u.getEmail());
userUpdt.setSiteweb(u.getSiteweb());
userUpdt.setLocalisation(u.getLocalisation());
userUpdt.setDescription(u.getDescription());
s.update(userUpdt);
} else {
SimpleDateFormat formater = new SimpleDateFormat(
"dd-MM-yyyy hh:mm:ss");
Date aujourdhui = new Date();
u.setDateInscrit(formater.format(aujourdhui));
s.persist(u);
}
tx.commit();
}
private void validationEmail(String email) throws Exception {
UtilisateurDAO<Utilisateur, String> ud = new UtilisateurDAO<Utilisateur, String>();
if (ud.findByID(email) != null)
throw new Exception("Adresse mail déjà utilisée.");
else if (email == null || ud.findByID(email) != null
|| !email.matches("([^.@]+)(\\.[^.@]+)*@([^.@]+\\.)+([^.@]+)")) {
throw new Exception("Merci de saisir une adresse mail valide.");
}
}
private void validationDateDeNaiss(Integer jj, Integer mm, Integer aaaa)
throws Exception {
switch (mm) {
case 2:
if (jj > 28 && ((aaaa / 4) % 100 == 0 && aaaa % 400 == 0))
throw new Exception(
"Merci de vérifier votre date de naissance.");
break;
case 4:
if (jj == 31)
throw new Exception(
"Merci de vérifier votre date de naissance.");
break;
case 6:
if (jj == 31)
throw new Exception(
"Merci de vérifier votre date de naissance.");
break;
case 9:
if (jj == 31)
throw new Exception(
"Merci de vérifier votre date de naissance.");
break;
case 11:
if (jj == 31)
throw new Exception(
"Merci de vérifier votre date de naissance.");
break;
}
}
private void validationMotsDePasse(String motDePasse, String confirmation)
throws Exception {
if (motDePasse != null && confirmation != null) {
if (!motDePasse.equals(confirmation)) {
throw new Exception(
"Les mots de passe entrés sont différents, merci de les saisir à nouveau.");
} else if (motDePasse.length() < 6) {
throw new Exception(
"Les mots de passe doivent contenir au moins 6 caractères.");
}
} else {
throw new Exception(
"Merci de saisir et confirmer votre mot de passe.");
}
}
private static void validationNom(String nom) throws Exception {
ConfigFDAO<ConfigF, Integer> cfd = new ConfigFDAO<ConfigF, Integer>();
UtilisateurDAO<Utilisateur, String> ud = new UtilisateurDAO<Utilisateur, String>();
if (ud.findByNom(nom) != null)
throw new Exception("Nom d'utilisateur déjà utilisée.");
else if (nom == null
|| nom.length() < cfd.findByID(0).getPseudominsize()
|| nom.length() > cfd.findByID(0).getPseudomaxsize()) {
throw new Exception("Le nom d'utilisateur doit contenir au moins "
+ cfd.findByID(0).getPseudominsize() + " et au maximum "
+ cfd.findByID(0).getPseudomaxsize() + " caractères.");
}
}
private static String getNomFichier(Part part) {
for (String cd : part.getHeader("content-disposition").split(";")) {
if (cd.trim().startsWith("filename")) {
String filename = cd.substring(cd.indexOf('=') + 1).trim()
.replace("\"", "");
return filename.substring(filename.lastIndexOf('/') + 1)
.substring(filename.lastIndexOf('\\') + 1);
}
}
return null;
}
}
MultipartFilter.java
public class MultipartFilter implements Filter {
// Init
// ---------------------------------------------------------------------------------------
private long maxFileSize;
// Actions
// ------------------------------------------------------------------------------------
/**
* Configure the 'maxFileSize' parameter.
*
* @throws ServletException
* If 'maxFileSize' parameter value is not numeric.
* @see javax.servlet.Filter#init(javax.servlet.FilterConfig)
*/
public void init(FilterConfig filterConfig) throws ServletException {
// Configure maxFileSize.
String maxFileSize = filterConfig.getInitParameter("maxFileSize");
if (maxFileSize != null) {
if (!maxFileSize.matches("^\\d+$")) {
throw new ServletException(
"MultipartFilter 'maxFileSize' is not numeric.");
}
this.maxFileSize = Long.parseLong(maxFileSize);
}
}
/**
* Check the type request and if it is a HttpServletRequest, then parse the
* request.
*
* @throws ServletException
* If parsing of the given HttpServletRequest fails.
* @see javax.servlet.Filter#doFilter(javax.servlet.ServletRequest,
* javax.servlet.ServletResponse, javax.servlet.FilterChain)
*/
public void doFilter(ServletRequest request, ServletResponse response,
FilterChain chain) throws ServletException, IOException {
// Check type request.
if (request instanceof HttpServletRequest) {
// Cast back to HttpServletRequest.
HttpServletRequest httpRequest = (HttpServletRequest) request;
// Parse HttpServletRequest.
HttpServletRequest parsedRequest = parseRequest(httpRequest);
// Continue with filter chain.
chain.doFilter(parsedRequest, response);
} else {
// Not a HttpServletRequest.
chain.doFilter(request, response);
}
}
/**
* @see javax.servlet.Filter#destroy()
*/
public void destroy() {
// I am a boring method.
}
// Helpers
// ------------------------------------------------------------------------------------
/**
* Parse the given HttpServletRequest. If the request is a multipart
* request, then all multipart request items will be processed, else the
* request will be returned unchanged. During the processing of all
* multipart request items, the name and value of each regular form field
* will be added to the parameterMap of the HttpServletRequest. The name and
* File object of each form file field will be added as attribute of the
* given HttpServletRequest. If a FileUploadException has occurred when the
* file size has exceeded the maximum file size, then the
* FileUploadException will be added as attribute value instead of the
* FileItem object.
*
* @param request
* The HttpServletRequest to be checked and parsed as multipart
* request.
* @return The parsed HttpServletRequest.
* @throws ServletException
* If parsing of the given HttpServletRequest fails.
*/
@SuppressWarnings("unchecked")
// ServletFileUpload#parseRequest() does not return generic type.
private HttpServletRequest parseRequest(HttpServletRequest request)
throws ServletException {
// Check if the request is actually a multipart/form-data request.
if (!ServletFileUpload.isMultipartContent(request)) {
// If not, then return the request unchanged.
return request;
}
// Prepare the multipart request items.
// I'd rather call the "FileItem" class "MultipartItem" instead or so.
// What a stupid name ;)
List<FileItem> multipartItems = null;
try {
// Parse the multipart request items.
multipartItems = new ServletFileUpload(new DiskFileItemFactory())
.parseRequest(request);
// Note: we could use ServletFileUpload#setFileSizeMax() here, but
// that would throw a
// FileUploadException immediately without processing the other
// fields. So we're
// checking the file size only if the items are already parsed. See
// processFileField().
} catch (FileUploadException e) {
throw new ServletException("Cannot parse multipart request: "
+ e.getMessage());
}
// Prepare the request parameter map.
Map<String, String[]> parameterMap = new HashMap<String, String[]>();
// Loop through multipart request items.
for (FileItem multipartItem : multipartItems) {
if (multipartItem.isFormField()) {
// Process regular form field (input
// type="text|radio|checkbox|etc", select, etc).
processFormField(multipartItem, parameterMap);
} else {
// Process form file field (input type="file").
processFileField(multipartItem, request);
}
}
// Wrap the request with the parameter map which we just created and
// return it.
return wrapRequest(request, parameterMap);
}
/**
* Process multipart request item as regular form field. The name and value
* of each regular form field will be added to the given parameterMap.
*
* @param formField
* The form field to be processed.
* @param parameterMap
* The parameterMap to be used for the HttpServletRequest.
*/
private void processFormField(FileItem formField,
Map<String, String[]> parameterMap) {
String name = formField.getFieldName();
String value = formField.getString();
String[] values = parameterMap.get(name);
if (values == null) {
// Not in parameter map yet, so add as new value.
parameterMap.put(name, new String[] { value });
} else {
// Multiple field values, so add new value to existing array.
int length = values.length;
String[] newValues = new String[length + 1];
System.arraycopy(values, 0, newValues, 0, length);
newValues[length] = value;
parameterMap.put(name, newValues);
}
}
/**
* Process multipart request item as file field. The name and FileItem
* object of each file field will be added as attribute of the given
* HttpServletRequest. If a FileUploadException has occurred when the file
* size has exceeded the maximum file size, then the FileUploadException
* will be added as attribute value instead of the FileItem object.
*
* @param fileField
* The file field to be processed.
* @param request
* The involved HttpServletRequest.
*/
private void processFileField(FileItem fileField, HttpServletRequest request) {
if (fileField.getName().length() <= 0) {
// No file uploaded.
request.setAttribute(fileField.getFieldName(), null);
} else if (maxFileSize > 0 && fileField.getSize() > maxFileSize) {
// File size exceeds maximum file size.
request.setAttribute(fileField.getFieldName(),
new FileUploadException(
"File size exceeds maximum file size of "
+ maxFileSize + " bytes."));
// Immediately delete temporary file to free up memory and/or disk
// space.
fileField.delete();
} else {
// File uploaded with good size.
request.setAttribute(fileField.getFieldName(), fileField);
}
}
// Utility (may be refactored to public utility class)
// ----------------------------------------
/**
* Wrap the given HttpServletRequest with the given parameterMap.
*
* @param request
* The HttpServletRequest of which the given parameterMap have to
* be wrapped in.
* @param parameterMap
* The parameterMap to be wrapped in the given
* HttpServletRequest.
* @return The HttpServletRequest with the parameterMap wrapped in.
*/
private static HttpServletRequest wrapRequest(HttpServletRequest request,
final Map<String, String[]> parameterMap) {
return new HttpServletRequestWrapper(request) {
public Map<String, String[]> getParameterMap() {
return parameterMap;
}
public String[] getParameterValues(String name) {
return parameterMap.get(name);
}
public String getParameter(String name) {
String[] params = getParameterValues(name);
return params != null && params.length > 0 ? params[0] : null;
}
public Enumeration<String> getParameterNames() {
return Collections.enumeration(parameterMap.keySet());
}
};
}
}
提前致谢。