retreiving ArrayList as a session attribute

Question

Suppose I got class:

import java.io.Serializable;


public class UrlEntry implements Serializable
{
    private String shortUrl;
    private String longUrl;
    private long clicks;


    public UrlEntry(String shortUrl, String longUrl, long clicks)
    {
        this.shortUrl = shortUrl;
        this.longUrl = longUrl;
        this.clicks = clicks;
    }


    public String getShortUrl()
    {
        return shortUrl;
    }
    public void setShortUrl(String shortUrl)
    {
        this.shortUrl = shortUrl;
    }
    public String getLongUrl()
    {
        return longUrl;
    }
    public void setLongUrl(String longUrl)
    {
        this.longUrl = longUrl;
    }
    public long getClicks()
    {
        return clicks;
    }
    public void setClicks(long clicks)
    {
        this.clicks = clicks;
    }

    public UrlEntry(){}


}

This is code from controller servlet

HttpSession session =  request.getSession(true);
ArrayList<UrlEntry> list = new ArrayList<UrlEntry>();
list.add(new UrlEntry("abc","site1.com",1));
list.add(new UrlEntry("def","site2.com",2));
list.add(new UrlEntry("ghi","site3.com",3));
session.setAttribute("urls", list);                     
response.sendRedirect("index.jsp");

This is part of code from index.jsp this works well

<%=request.getSession().getAttribute("urls")%>

but this doesn't work:

<%=(ArrayList<UrlEntry>)request.getSession().getAttribute("urls")%>

with error

UrlEntry cannot be resolved to a type
<%=(ArrayList<UrlEntry>)request.getSession().getAttribute("urls")%>

What am I doing wrong? Should I declare UrlEntry as serializable? Maybe some problems with the constructor?

you have this in your jsp? <%@page import="packageName.UrlEntry"%> — nano_nano, May 25 '16 at 11:53
Yes that was the issuue. The problem fixed. Thank you very much — kurumkan, May 25 '16 at 12:15

score 4 · Accepted Answer · answered May 25 '16 at 11:52

4

You will have to first import the UrlEntry class in the jsp page.

<%@page import="packageName.UrlEntry"%>

answered May 25 '16 at 11:52

Shailesh Yadav

1,061
1
15
30

score 3 · Answer 2 · answered May 25 '16 at 11:50

3

The error is raised by the JSP compiler. It tells you that you need to add an import directive for UrlEntry to the JSP page.

answered May 25 '16 at 11:50

wero

32,544
3
59
84

retreiving ArrayList as a session attribute

2 Answers2