Nicht in der Lage Bild anzuzeigen in Web-Browser

Question

SignupServlet

public class SignupServlet extends HttpServlet{ 
private static final long serialVersionUID = 1L; 
private static final String DIR = "Nanyang Polytechnic/FYPJ Project2/FYPJ/WebContent/profile"; 
//private static final String SAVE_DIR="images"; 

// configuration to get Image file name 
private String extractFileName(Part part){ 
    String contentDisp = part.getHeader("content-disposition"); 
    String[] items = contentDisp.split(";"); 
    for (String s :items){ 
     if(s.trim().startsWith("filename")){ 
      return s.substring(s.indexOf("=")+2, s.length()-1); 
     } 
    } 
    return ""; 
} 
/** 
* @see HttpServlet#HttpServlet() 
*/ 

public SignupServlet() { 
    super();  
} 

/** 
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response) 
*/ 

protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { 
} 

/** 
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response) 
*/ 

protected void doPost(HttpServletRequest request, HttpServletResponse response) 
     throws ServletException, IOException { 

     response.setContentType("text/html;charset=UTF-8"); 
     PrintWriter out = response.getWriter(); 


     //configuration for declaring file saving path 

     //String relativeWebPath = "/profile"; 
     //String savePath = getServletContext().getRealPath(relativeWebPath); 
     String savePath = "D:" + File.separator + DIR ; 

     File fileSaveDir=new File(savePath); 
     if(!fileSaveDir.exists()){ 
       fileSaveDir.mkdir(); 
      } 



     // Configuration to generate Random passsword 
     Random rand = new Random(); 
     int num = rand.nextInt(900000) + 100000; 
     String Password = Integer.toString(num); 
     //End 


     String Name = request.getParameter("name"); 
     String Email = request.getParameter("email"); 
     String UserType = request.getParameter("usertype"); 
     String strDOB = request.getParameter("dob"); 
     String Gender = request.getParameter("gender"); 
     String address = request.getParameter("address"); 



     Part part = request.getPart("file"); 
     String fileName = extractFileName(part); 

     String filePath = savePath + File.separator + fileName; 
     part.write(savePath + File.separator + fileName); 


     java.sql.Date d; 

     SimpleDateFormat sdf; 
     sdf = new SimpleDateFormat("yyyy-MM-dd"); 
     java.util.Date d2 = null; 

     try{ 
      d2 = sdf.parse(strDOB); 
     } catch (ParseException e1) { 
      e1.printStackTrace(); 
     } 

     d = new java.sql.Date(d2.getTime()); 

     DBAO dbao = null; 
     Login login = null; 




     //configuration for url for image 
     /*FileInputStream fis = new FileInputStream(filePath); 
     BufferedInputStream bis = new BufferedInputStream(fis); 
     BufferedOutputStream output = new BufferedOutputStream(response.getOutputStream()); 
     for (int data; (data = bis.read()) > -1;){ 
      output.write(data); 
     } 
     */ 


     try {  


      // configuration for email 
      Security.addProvider(new com.sun.net.ssl.internal.ssl.Provider()); 
      Properties props = System.getProperties(); 
       String host = "smtp.gmail.com"; 
       String port = "465"; 
       String fromEmail = "lookeverybodysg@gmail.com"; 
       String username = "lookeverybodysg"; 
       String password = "catdog1234"; 

       props.put("mail.smtp.user", fromEmail); 
       props.put("mail.smtp.host", host); 
       props.put("mail.smtp.starttls.enable","true"); 
       props.put("mail.smtp.debug", "true"); 
       props.put("mail.smtp.auth", "true"); 
       props.put("mail.smtp.port", port); 
       props.put("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory"); 
       props.put("mail.smtp.socketFactory.port", port); 
       props.put("mail.smtp.socketFactory.fallback", "false"); 


       Session mailSession = Session.getDefaultInstance(props, new javax.mail.Authenticator() { 

        protected PasswordAuthentication getPasswordAuthentication() { 
         return new PasswordAuthentication("lookeverybodysg", "catdog1234"); // username and password 
        } 
       }); 
       mailSession.setDebug(true); 

       Message mailMessage = new MimeMessage(mailSession); 


      dbao = new DBAO(); 

       if (dbao.emailExists(Email)){ 


        request.setAttribute("Name", Name); 
        request.setAttribute("Email", Email); 
        request.setAttribute("UserType", UserType); 
        request.setAttribute("strDOB", strDOB); 
        request.setAttribute("Gender", Gender); 
        request.setAttribute("Pic", filePath); 
        request.setAttribute("Address", address); 


        response.setContentType("text/html"); 
        out.println("<script type=\"text/javascript\">"); 
        out.println("alert('The email you have used has already been regietered.');"); 
        out.println("location='Login.jsp#signup';"); 
        out.println("</script>"); 
        return; 
       }else{ 
        login = new Login(); 
        login.setName(Name); 
        login.setEmail(Email); 
        login.setPassword(Password); 
        login.setUserType(UserType); 
        login.setDOB(d); 
        login.setGender(Gender); 
        login.setPic(filePath); 
        login.setAddress(address); 

        boolean isUserSaved = dbao.saveNewUser(login); 

       if (isUserSaved){ 
        mailMessage.setFrom(new InternetAddress("lookeverybodysg@gmail.com")); 
        mailMessage.setRecipient(Message.RecipientType.TO, new InternetAddress(Email)); 
        mailMessage.setSubject("Thank You for signing up to LookEveryBody!"); 
        mailMessage.setContent("Email :" + Email + "<br> Password :" + Password, "text/html"); 

        Transport transport = mailSession.getTransport("smtps"); 
        transport.connect (host, 465, username, password); 

        transport.send(mailMessage); 

        response.setContentType("text/html"); 
        out.println("<script type=\"text/javascript\">"); 
        out.println("alert('Your accout has been successfully created, please go to your email to get your password.');"); 
        out.println("location='Login.jsp';"); 
        out.println("</script>"); 
        return; 
       } 

      } 

     }catch(Exception e) 
     { 
      e.printStackTrace(); 
     } 
} 
} 

hairstylistprofile.jsp (Anzeigebild Seitencode)

<a class="image fit"><img src="<%=login.getPic() %>" alt="" /></a> 

Ich war mein Bild in einem Web-Browser anzuzeigen nicht in der Lage (google chrome, etcc Aber es kann im Java-Browser angezeigt werden, jede Hilfe wäre toll.

Answer 1

Bitte überprüfen Sie den Wert von login.getPic() zurückgegeben. Es scheint mir, dass es einen Wert wieenthält. Die login.getPic() sollte eine gültige URL für das Bild enthalten, damit es im Browser angezeigt wird.

Wenn Sie Ihre Bilddateien außerhalb Ihres Webanwendungspfads speichern, können Sie ein Servlet erstellen, das die Bilddatei liest und an die Antwortausgabe streamt. Verwenden Sie dann diese Servlet-URL als Quelle für Ihr HTML-Abbild, z. B. <img src="/picture/profile.jpg"/>. Verwenden Sie die Taglib <c:url>, um den Kontextpfad Ihrer Webanwendung korrekt anzuwenden.

@WebServlet("/picture/*") 
public class ProfilePictureServlet extends HttpServlet { 
    private static final String PICTURE_PATH = "D:/Pictures/"; 

    @Override 
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { 
     String picture = req.getPathInfo().substring(1); // profile.jpg 
     BufferedImage bi = ImageIO.read(new File(PICTURE_PATH + picture)); 
     OutputStream out = resp.getOutputStream(); 

     resp.setContentType("image/jpg"); 
     ImageIO.write(bi, "jpg", out); 
     out.close(); 
    } 
}