Inserting items in a List on a JAVA SERVER PAGE

I want to insert new items into a multiple select list from database
on selecting an item from an existing list in a JSP.
I am not sure how to do this.
-thanks

Can you elobrate you're problem more like you just want to select from database or want to insert in database???

Similar Messages

Code to set and destroy session variables in Java Server Pages(JSP)

code to set and destroy session variables in Java Server Pages(JSP)
we have use following statement to set session variable
session.setAttribute("userClient",id);
we have use following statement to destroy session variable
session.setAttribute("userClient","");
and
the session.invalidate() is not working
Plz. solve this probem

code to set and destroy session variables in Java
Server Pages(JSP)
we have use following statement to set session
variable
session.setAttribute("userClient",id);
we have use following statement to destroy session
variable
session.setAttribute("userClient","");Perhaps if you tried using
session.setAttribute("userClient", null);
or
session.removeAttribute("userClient");
and
the session.invalidate() is not workingNot working how?
>
Plz. solve this probem

Java Server Page

Good Day, Gentleman and Ladies
I need help in Java Server Pages (JSP)
I using Weblogic 6.1 as Development Environment.
Developing in Macromedia Dreamweaver 4.
When I preview using Dreamweaver, It can be display properly.
But when viewing in Internet Explorer, it give following error
unreachable statement - out.print("\r\n\t\t\t
uses or override a deprecated API.
Following is the statement in JSP Code
<input name="<%=ParamName%>" type="text" value="" size="8">
<a href = "javascript:show_calendar('parameterInputForm.<%=ParamName%>');"><img src="images/toolbar/calendar.gif" border=0 alt="Click to see calendar" align="abmiddle"></a>
Could any kind souls please help me in it.
Thank you very much, your help is deeply appreciated
Luo_Sha_Zong_Zu

Hi
First, dont put msg with subjects like "Java Server Page". Put msg with subject showing the problem, like "unreachable statement - out.print("\r\n\t\t\t uses or override a deprecated API"
Your problem is with the value of the var "ParamName". It has something with "return" and "tab". Check it

Displaying a picture or image in a java server page

I am using tomcat to load my java server pages. I need to display a picture in the page. Can somebody help?

The images are not located on my site, or computer, but rather they are located on different websites. This is what the browser recieves when the jsp runs:
<IMG SRC="http://www.thesite.com/images/theimage.gif"/>
and the site that is running the JSP is:
www.mysite.com/jsp/PicPage.jsp
Is this what you think maybe happening when the browser tries to process the linked image:
www.mysite.com/images/theimage.gif
I don't really understand the nuances of HTML, but if I specify a web address completely in the HTML then wouldn't that specified website be queried for the pictures by the web browser?
Thank you for any help you can provide.
John

How do I set a breakpoint in a Java Server page (.jsp)?

I have set up an application for remote debugging and am able to connect to it from JDeveloper. When the code execution comes to breakpoints that I have set in java (.java) files they work and the application stops so I can debug etc.
This also applies to breakpoints set in java code that is called from Java Server pages.
However if I set breakpoints directly in a java server page whether it is in html code or in java code (such as scriplets) the execution does not stop and the breakpoints are ignored.
Why? Is there some extra thing I have to do? I have tried in Project Properties/Run/Debug/Profile/Edit/Launch Settings to choose server as Virtual Machine for instance but that does not change anything.
Comment. I do not know if this is of interest but I am going to add some java server pages to an application and they are defined in a directory like this:
. . . src\org\yawlfoundation\yawl\resourcing\jsf\jsp
but when the tomcat deploys the .war file they end up here:
. . . apache-tomcat-6.0.18\webapps\resourceService
As I can find no package declaration in a .jsp file this should not matter but I mention it anyway.
Edited by: user10477024 on Nov 25, 2008 5:32 AM

Hi user10477024,
thanks for explaining your background on what you are trying to do and I do understand the approach you are taking. Unlike user10689900's completely random post.
I've tried to convey why there is no support for JSP debugging in JDev, but again the main reason is that the current frameworks do not code Java directly into a JSP. The JSP is purely used to position the components on the page aiding visual design and real Java classes in tag libs do the rest.
So the evolution has been:
Servlets (Java classes writing HTML logic and intermingling presentation and business logic)
JSP 1.0 JSP (HTML looking) files where you can add scriptlets enclosed in <% ... %> <- you are here
JSP 1.1 Introduction of Tags and Tag libraries, tag libraries are true java classes and the JSP controls layout and simpler more elegant design.
Really JSP 1.1 is all about building reusable components together in tag libraries that can be reused across pages and improving design by not mixing presentation and business logic code together.
If I had inherited something as you have, my advice (if you can) would be to code up some tag libraries because it would be a good learning experience and would be very helpful for moving to more advanced frameworks like JSF.
regards,
Brenden

Java Server Page Translation Error

Hello !
I'm new in JSP pages and i try to launch Hello.jsp on Java Web Server(2.0)
I get the following error :
java Server Page Transalation Error
Error during compilation
Can't load class : pagecompile.jsp._Hello
With Hello.jsp :
<html>
<head>
<title>My first JSP page
</title>
</head>
<body>
<%@ page language="java %>
<% System.out.println("Hello World"); %>
</body>
</html>
This is put in the directory public_html
And and call it with http//myhostname:8080/Hello.jsp
I really don't understand what the matter with that !
Thanks very much to help me !

Sorry i found this error.
But i've another :
The html page is generated but Hello World is not printed !
Have you got an idea ?
Thanks

Integration of PL/SQL and JSP (Java Server Pages)

I need to match a web application developed with PL/SQL with another developed in JSP (Java Server Pages) the problem is that the two apps interact with the same databese, an share de same users, I need to know how to get the user and password loged into pl/sql when the user want to use same of de .jsp pages running on another application server?

Hi Michael Vstling,
Did you try the java classes library (SDOAPI) that can be downloaded from OTN?
It may provide you with a better alternative when manipulating geometries in the Java space. There is an adapter in SDOAPI which can convert a JDBC STRUCT object into Java Geometry object defined in SDOAPI, and vice versa.
There are at least two ways in mixing PL/SQL and Java. The first one, as you mentioned, is to define your custom function in terms of PL/SQL and call it from within your Java program. With SDOAPI, you have the second option, which is to define your own functions in Java using SDOAPI and deploy them as Java stored procedures in db. You can then call them from within your PL/SQL code. In either way performance depends on a lot of things and generally it requires a "try and improve" approach.
About JPublisher and sdo_ordinate_array it may not be a spatial related problem. Did you try search the Java-related forums first?
LJ

Java Server Pages Programming Database Access Error Through Tomcat

Question# 1
I am trying to access MYSQL Database through JAVA Server Pages programming using Tomcat Server as web server on win xp.
Whenever I give following url http://localhost:8080/jspBook/ch1/customers.jsp in web browser , I get followin errors.
HTTP Status 500 -
type Exception report
message
description The server encountered an internal error () that prevented it from fulfilling this request.
exception
org.apache.jasper.JasperException
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:510)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:393)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
root cause
java.lang.NullPointerException
org.apache.jsp.ch1.customers_jsp._jspService(org.apache.jsp.ch1.customers_jsp:96)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:332)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
note The full stack trace of the root cause is available in the Apache Tomcat/5.5.15 logs.
Apache Tomcat/5.5.15
I am facing this problem since one month. I tried searching on google, but could not get concrete answer. I have configured mysqlconnector to connect to mysql and also configured other things in Tomcat's webapps folder. But I could not overcome this error.
Please reply urgently. Thankz for the help and time. ?

<%@ page import="java.sql.*" %>
<%@ page contentType="text/html" %>
<html>
<head>
     <title>Insurance Quoting System</title>
</head>
<body>
<basefont face="Arial">

<%! ResultSet rs = null;%>

<%
     try {
          Class.forName("org.gjt.mm.mysql.Driver");
          Connection db = DriverManager.getConnection(
"jdbc:mysql://localhost:3306/quoting");
          Statement s = db.createStatement();
          rs = s.executeQuery("select * from customer");
     catch (Exception e) {
// For now, just report the error to the system log
     System.out.println(e.toString());
%>

<table width="550" border="0" align="center">
<tr>
<td bgcolor="#006633">
<div align="center">
          <font size="6" color="#FFFFFF"><b>Insurance Quoting System</b></font>
     </div>
</td>
</tr>
<tr>
<td>
<p> </p>
<p> </p>
<p align="center"><b>Customers</b></p>
<table width="290" border="0" align="center">
<%
     try {
          while (rs.next()) {
%>

     <tr>
          <td width="20"><%= rs.getInt(1) %></td>
          <td width="70"><%= rs.getString(2) %></td>
          <td width="70"><%= rs.getString(3) %></td>
          <td width="40">
               <a href="custMaint.jsp?id=<%= rs.getString(1) %>&action=edit">edit
</a>
          </td>
          <td width="40">
               <a href="custMaint.jsp?id=<%= rs.getString(1) %>&action=delete">delete
</a>
          </td>
          <td width="40">
               <a href="custMaint.jsp?id=<%= rs.getString(1) %>&action=newQuote">new quote
</a>
          </td>
     </tr>
<%
     catch (SQLException e) {
     // For now, just report the error to the system log
     System.out.println(e.toString());
%>
</table>
</td>
</tr>
<tr>
     <td>
          <p> </p>
     <p align="center">New Customer</p>
     </td>
</tr>
</table>
</body>
</html>
I have tried all possible configurations of classpath with mysqlconnectorj and Tomcat, but i could not find any solution. Plz help urgently. Thankz a lot.

Your DB connection is probably failing
As a result your result set "rs" is null when you get to it later on, causing a null pointer exception.
Do you need to provide a username/password for your database?
Have you configured your database to allow connections from localhost?
If you haven't already figured it out, doing SQL programming in a JSP is bad practice. Put your SQL code into a java bean / class where it belongs.

Using Java Beans in Java Server Pages

Can we not use a method of Java Bean in a Java Server Page ?
I am trying to retrieve the user email from a java bean method "getUserEmail". I am instantiating the class, but when I try to use that in JSP tags, I am getting an error.
<jsp:useBean class = "formjavabean.application" id = "applicationId" scope = "session" />
<%@ page import="java.io.*, java.lang.*" %>
<%!
String user = applicationId.getUserEmail() ;
String f3 = "ftn03" ;
String f3not = "ftn03 file not uploaded";
...........I am failing in debugging that, can anyone help plz ?

Here is my whole code in parts:
First the head section:
<head>
<title> Fastran </title>
<jsp:useBean class = "formjavabean.application" id = "applicationId" scope = "session" />
</head>JSP part in the body section :
<%@ page import="java.lang.*, java.io.*" %>
<%!
private String f3 = "ftn03";
private String f3not = "ftn03 file not uploaded";
private String f7 = "ftn07";
private String f7not = "ftn07 file not uploaded";
private String f9 = "ftn09";
private String f9not = "ftn09 file not uploaded";
public String checkFile3()
    File ch3 = new File("C:\\JBoss\\jboss-4.0.5.GA\\bin\\Fastran\\ftn03") ;
    if (ch3.exists() == true)
        return f3 ;
    else
        return f3not ;
public String checkFile7()
    File ch7 = new File("C:\\JBoss\\jboss-4.0.5.GA\\bin\\Fastran\\ftn07") ;
    if (ch7.exists() == true)
        return f7 ;
    else
        return f7not ;
public String checkFile9()
    File ch9 = new File("C:\\JBoss\\jboss-4.0.5.GA\\bin\\Fastran\\ftn09") ;
    if (ch9.exists() == true)
        return f9 ;
    else
        return f9not ;
%>Java Script in the body section, using methods defined in the JSP part:
<script type="text/javascript">
        function validate_file ( )
                var file3 = "<%= checkFile3() %>" ;
                var file7 = "<%= checkFile7() %>" ;
                var file9 = "<%= checkFile9() %>" ;
                if ( file3 != "ftn03" || file7 != "ftn07" || file9 != "ftn09" )
                    alert("Please upload the required file") ;
                    return ("fastran.jsp") ;
                else
                    return ("processForm.jsp") ;
        function validate_upload ( )
                valid = true;
                if ( document.val_file.filefield.value == "")
                        alert("Please select a file for upload") ;
                        valid = false;
                return valid;
    </script>Finally the form and button part of the page, in the body section:
<form name = "val_file" method="post" action="upload.jsp" name="submit" enctype="multipart/form-data" onSubmit = "return validate_upload();">
Upload Files: <input type="file" name="filefield" >&nbsp&nbsp<input type="submit" name="submit" value="Upload"><br>
<font color = "Red"><h5>(ftn03,ftn07, and ftn09)</h5></font><br><br><br>
Files on the server :<br><br>
<font color = "Green"><h5>
<%= checkFile3() %><br>
<%= checkFile7() %><br>
<%= checkFile9() %><br>
</h5></font>
<br><br><br><br><br><br><br><br><br>
<input type=button onClick="location.href='logintest.jsp'" value='Home'> <input type=button onClick="location.href=validate_file()" value='Proceed' ><br>
</form>Now try this:
Change <%! to <%, or try using bean method as:
String userEmail = applicationId.getUserEmail() ;..........and that is my problem. I would really appreciate any help, thanks

Books Java Server Pages. I would like to learn

I have been using PHP for the last 4 years, but would love to learn Java Server Pages, .jsp Can anyone recommend good books that can teach me the basics of .jsp so that I can start creating webpages with webforms etc....
I see .jsp as a logical progression.

Hi,
You will get lot of books on JSP written by some of the best brains in Java / J2EE. However, there is nothing that substitues exposure / experience.
I would suggest that you use Google & check out some of the web sites that offer helps for beginners in JSP. You can also download OC4J, develop your JSPs & start playing with it.
And, if you have any problems, the forums are always there...:)
Regards,
Sandeep

Java server pages+ database

res sir,
I want to ask you a qestion regarding a java server page sir pls. can you tell me the answer of my question. i will be pleased to know about my answer.
Q1:- Can Java Server Pages help to communicate With Databaseand Can I put any informatin in databse through JSP?

yes jsp pages can communicate with databases, done with jdbc. people use it all the time, like in a login page, you can connect to a database and check the user and password before allowing the user into your site.

WHAT ARE JAVA SERVER PAGES?

Right now I am learning java on my own, and I have a question.
What are Java Server Pages(JSP)?
Thanks

In short, they're standard HTML pages with embedded Java code to dynamically create pages based on values from the user, a database, or some other source. Search the java.sun.com site for a more detailed explanation, and examples too. Or, pick up a book.

I get "An unexpected error has occurred" whenever I try to create item in a list or view site permission page

I am working a SharePoint site with a custom masterpage and css. Everything displays just fine and the site functions with several subsites, and so forth. I have double-checked to ensure that important content placeholders were on the new masterpage, even
if they were "hidden" from view.
However, a new issue came up this week: I was moved from a contributor to a designer list so that I could convert word files in a doc library in web pages. When that change happened, I lost the ability to select "add new items" to lists or add
events to calendars. [not sure if causation, or just correlation] On a similar note, no one--not even those with higher permissions levels than me---can access the "site permissions" page in browser now (not sure if this coincides with my issue over
the lists/calendars, but in both cases the notification "an unexpected error has occurred" comes up).
I temporarily switched a subsite to the default masterpage, and lists and site permissions page functioned fine--no error. Therefore, it appears as though something in the custom masterpage (or embedded css?) is causing this error to come up. But what could
it be?
I ran across a forum question that mentioned a bug related to alternative css:
http://social.technet.microsoft.com/Forums/sharepoint/en-US/53151269-dd61-4c71-8263-c1880450a1bb/sharepoint-2010-unable-to-access-site-settings-site-permissions-from-a-site-created-from-a-template Solutions
said to check the correlation ID and use powershell. The guy in my department who checked the correlation ID said that nothing useful came up, and I got the impression that the powershell solution didn't work out for him either (I don't work on that side of
things; I am on the design side).
So, does anyone have any idea what the problem could be? Again, I have checked and double-checked those content placeholders in my custom masterpage - they are all there. I built the site using one of Randy Drisgill's masterpage templates.
Up until this point, I haven't had any issues with the template, my custom code, etc.

I am having the same issue, was this ever resolved?

Servlets vs. Java Server Pages

Hi to all.
Could you please tell me the features from the two techniques?
What are the advantages and the disadvantages? What, do you
think, is better?
I need a solution to read out the Windows User name (I have got
the Java Code to realize that (signed jar file, rights,
everything ok) but shall I and HOW do I implement it in the
servlet or the jsp?
Thank you very much for your help?
Henrik R|nger

Henrik,
Generally a JSP is used to combine html and Java code. The
result is that you can build an attactive html page and insert
dynamic content using Java where you want. When a user accesses
the page, the webserver converts the .jsp page into a Servlet
and runs in within its Servlet engine. I then returns the
results to the requestor, generally in html.
A Servlet, is used to generate dynamic content, including html,
xml, images, etc.. Although Servlets can return html to the
requestor, they are less elegant in producing attractive html
pages.
Both are good technologies that work together to help you
produce web based applications. You can look at the help
documentation in JDevevloper 3.2 for further information. See
the topic "About HTTP Servlets". There are also a number of
sites with good information (i.e. www.javasoft.com).
Gary
JDev Team

Java Server pages and STRUTS.

HI all,
i m displaying a list in the list box using html tag in the jsp page. the problem is if the size of the text is bigger than listbox it doesnot show the full text.
is there is any other HTML:tag to make the full text visible.

I agree with bsampieri.
Keep in mind that it's actually fairly easy to edit a cookie as they are really just text files stored in a specific folder (directory) that your web browser knows about. So you generally want to keep information stored in a cookie to a minimum.
For example, say we build a shopping site where you can buy widgets of all sorts. We decide to implement a shopping cart, that is, a list of all the things a customer intends to buy, the current price for each item (to reflect discounts), current shipping charges and so forth. If we stored that information in a cookie, someone could edit the cookie and change the prices.
So usually a cookie simply contains some means of identifying the customer, and additional details, such as the shopping cart and the customer's billing information are all stored on the server and exposed to the customer only through secure interfaces.
We also want to make sure that people can't arbituary change the values of their ids, so the id is usually encrypted into one very long string that looks like garbage.
So you are right, it is kind of boneheaded that we can't store multiple values, but that's a result of the decision to go from needed-functionality to code, rather than coding all of the possible situations and picking the desired functionality out of it. Fortunately there are other options. :)

Inserting items in a List on a JAVA SERVER PAGE

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