Ajax and JSP/Struts ... help

I am using AJAX in my jsp pages .... I got a problem ........
my jsp page is like that ....
<html:html>
//javascript for ajax ..code
<body>
<table id="inside_table">
<logic:present name="companyList" scope="session">
<html:select property="companyId" styleId="category" style="width:190px"
onchange="show();"> *
<html:options collection="companyList" labelProperty="companyName"
property="companyId"/>
</html:select>
</logic:present>
<html:form action"/xyz">
<%
ArrayList companyList=Session.getAttribute("companyList");
if(companyList!=null) {
%>
//here i have a table of data where i want to show the datas in text boxes .... and if required user can update the valus in the text boxes ... by cliking the uodate button
<html:sybmit>UPDATE</html:submit>
<%
%>
</html:form>
</body>
</html:html>
~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Now in the 1st select box ... when i select one company onchange a javascript show() method will call . Using
the Ajax technique from this show() method I called a struts action ... then from there I retrieve the datas for that company from database and stored in a arraylist and kept in session as "companyList" , then I used return null at Action class .
Now when Ajax got the response from the server ... I want to collect the Arraylist "companyList" from session , and now scince companyList is not null , It should show the datas in the table .
I did all the thing successfully , but only problem is that i am unable to show the datas in the table .
Actually, onreadystatechange when I got the response from the server I am unable to execute the required portion of the JSP page .....

You can't use the Java-based HttpSession in this scenario. Your JSP-Scriptlets are executed on the server-side before the page is rendered, so you can't use it directly from the JSP. AJAX (as the name suggests) is all about JavaScript and XML. I recommend you write the data you are interested in to the OutputStream of your HttpResponse object (which is available in the Struts action method).
E.g.
response.getOutputStream().write(/* here comes the data */);
response.flush;
return null;Most AJAX frameworks allow you to choose wether how you want to serialize your data, available options typically include XML, JSON and HTML. If you use handcrafted AJAX requests I'd suggest you use JSON, as its very easy to read, understand and construct in Java code.

Similar Messages

When to use servlets and jsp in an application like shoping cart?

Hi All
I m going to design and implement a web application using servelts and jsp. I am still at its requirements analyze stage.
The application is almost likely a shopping cart. So if any of you have the deep knowledge about this domain with servlets and jsp please help me for a good design. What I realy need to know is that
1. what are the core requirements for a shoping cart ?
2. use cases ?
3. best way to follow mvc with servlets and jsp for it?
you can answer to this at the abstract level. no need to go in detail.
if you have any documents like design and use cases mail me to [email protected]
your cooperation is highly appreciated in this regards.

Look into this kid
http://www.apl.jhu.edu/~hall/java/Servlet-Tutorial/Servlet-Tutorial-Session-Tracking.htm

Architecture question: Integrating AJAX and STRUTS

I'm slowly growing in familiarity with STRUTS and I have the basics of AJAX down, certainly as far as the request-response-parse-do something useful with the data paradigm goes.
My question is more about best practices in using an AJAX enable front-end with a STRUTS-based back-end.
In a nutshell, each user action is handled by a STRUTS action subclass. Requests are picked up by the STRUTS front controller and passed on to the handler for processing. The handler is then able to tell the controller which jsp/resource to send back to the user.
With AJAX, we are (generally) making specific data requests. We are essentially asking for data based on a set of parameters passed through on the request.
In the case of a dynamic search table (containing no business logic), the AJAX request is simply asking for a set of results that match some parameters supplied in the criteria form.
What should handle that data request?
I was thinking about a specific "data-server" set of classes which STRUTS can pass AJAX requests to.
NOTE: I'm thinking about this from the perspective of a new development, not tacking on to an existing application.
Thoughts, anyone?

So let me broaden the question slightly? What are the
best practices for implementing an AJAX solution with
STRUTS? I have looked around on the net but not found
anything that constructive yet.
Suggestions and/or pointers welcome.I have played around with AJAX just to understand how the technology works and how ajax can be integrated into a j2ee (or any other for that matter) web application. I havent worked on a project which has analyzed the best practises/pitfalls of ajax and implemented a solution.
Having said that, here's my take -
Ajax, as far as I know and have seen is a 'view' thinggy - enhanced user experience, lesser clicks, blah blah. The underlying XMLHttpRequest technology is just another way to hit the server with a request. And as I said before, once the server receieves a request, it really doesnt/shouldnt matter where and how the request originated from - it could a tunelled http request (as from an applet/swing app), a normal http request from a browser or a XMLHttpRequest (read ajax). The server validates incoming params if any and performs business logic.
And here's when the similarity ends. The response (or the view) is entirely dependent on the 'requestor'. For browsers, the server would emit html, wap for cellphones, objects to a swing/applet program (possibly).
The point I am trying to make is that this (the view part) is where you'll have to concentrate on tweaking (using the so called best practises) for ajax requests. For instance, there are a set of ajax tags already that you could reuse in your jsps which help developers build cool ajax enabled apps.
(See http://ajaxtags.sourceforge.net/)
There however are a few standard best practises for using ajax itself (and this is at a general ajax as a technology level) - see for example
http://www-128.ibm.com/developerworks/library/j-ajax1/?ca=dgr-lnxw01Ajax
ram.

Login Box example and source code on adf struts and JSP

Dear all..
I want to make application using ADF struts and JSP using oracle 10g Jdeveloper.
The user should login into the login box and verify everyone who has right to enter the home.jsp.
Anybody could help me with the source code as well as the step by step explanation...
I'm looking forward the help...

http://www.oracle.com/technology/products/jdev/collateral/papers/10g/reviewer/viewlets/reviewer_struts_viewlet_swf.html

Help me to convert Java and Jsp Files into WAR File!!!!

I need someone to help me to convert some java servlet files and jsp files into a WAR file. I need it URGENTLY and I'll be very grateful to anyone who is willing to help me! My email is [email protected] Thanks!!!!

Are the Oracle JDBC drivers 11g used?
oracle.jdbc.driver.OracleDriver is not supported in 11g drivers.
Please replace with:
oracle.jdbc.OracleDriver

File Upload using struts and jsp

Hi,
Anybody have sample coding for uploading files into the database using struts and jsp.
Thanking you in advance for providing the sample coding.
Veena

Hi Veena,
In Strutsconfig.xml you have to configure data sources like this
**************strutsconfig.xml******
<data-sources>
<data-source
type="org.apache.common.dbcp.BasicDataSource">
<set-property property="driverClassName"
vlaue="oracle.jdbc.driver.OracleDriver"/>
<set-property property="url" vlaue="jdbcracle:thin:@(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=localhost)(PORT=1521))(CONNECT_DATA=(SID =ORCL)))"/>

<set-property property="username"
vlaue="scott"/>
<set-property property="password"
vlaue="tiger"/>
</data-source>
</data-sources>
Now here is how to get data source
public class LookupAction extends Action
public Double getQuote(String symbol,
HttpServletRequest request)
throws Exception
Double price=null;
Connection conn=null;
Statement stmt=null;
ResultSet rs=null;
DataSource dataSource=null;
try
dataSource = getDataSource(request);
conn= dataSource.getConnection();
stmt= conn.createStatement();
rs= stmt.executeQuery("select * from stocks where" + "symbol='" + symbol +"'");
if (rs.next())
=======================
After you can use the coding what I posted earlier.
For that you need to create a table with attachment as a CLOB col.
then with prepared statement I am setting value .
Plz try your self every thing ok you can get that.
all the best
bye
sudheen

Hi frnds i want to help in servlet,java bean and JSP

hi friends i'm right now in M.SC(IT) and i want to do project in SERVLET,,JAVA BEANS and JSP ,
so pls give me a title about that
NOTE: I develop a project in group(2 persons there)
my email id is : [email protected] , [email protected] , [email protected]

You cannot pair your iPod to a cell phone, so forget about it.
The only way you can get free WiFi is to hang out at a Denny's, a Starbucks, or a truck stop, and I don't think your parents would approve....

Best practice for dealing with Recordsets, JDBC and JSP?

I've spent the last three years developing web apps using JSP, Struts and Kodo JDO for persistence. All of the content for the apps was created as Java objects using model classes and saved to an Oracle db. Thus, data retrieved from the db was as instances of the model classes and then put into Struts form beans, etc.
I changed jobs last month and am now having to use Servlets with JDBC to retrieve records from db tables and returning it into Recordsets. Oh, and I can't use Struts in my JSPs either. I'm beginning to think that I had it easy at my previous job but maybe that's just because I was used to it.
So here are my problems/questions:
I have two tables with a one to many relationship that I need to retrieve data from, show in a jsp and be able to update eventually.
So here's what I am doing:
a) In a servlet, I use a SQL statement to join the tables and retrieve the results into a Recordset.
b) I created a class with a bunch of String attributes to copy the Recordset data into, one Recordset row per each instance of the bean and then close the Recordset
c) I then add the beans to an ArrayList and save the ArrayList into the session.
d) Then, in the JSP, I retrieve the ArrayList from the session and iterate over each bean instance, printing the data out to the jsp. There are some logic statements to determine when not to print redundant data caused by the one to many join.
e) I have not written the code to update the data yet but was planning on having separate jsps for updating the (one) table and the (many) table.
Would most of you do something similar? Would you use one SQL statement to retrieve all of the data for display and use logic to avoid printing the redundant part of the data? Or would you have used separate SQL queries, one for each table? Would you have saved the results into something other than an instance of a bean class that represents one record in the RecordSet? Would you have had a bean class with attributes other than Strings - like had a collection attribute to hold the results from the "many" table? The way that I am doing everything just seems so cumbersome and difficult compared to using Struts and JDO before.
Your help/opinion will be greatly appreciated!

Would you use one SQL statement to retrieve all of the data for display Yes.
and use logic to avoid printing the redundant part of the dataNo.
I believe in minimising the number of queries. If it is a simple one-many join on a db table, then one query is better than one + n queries.
However I prefer to store the objects in a bean class with attributes other than strings - ie one object, with a collection attribute to hold the related "many" records.
Does the fact you are not using Struts mean that you have to use scriptlet code? (shudder)
Or are you using JSTL, or other custom tags?
How about tools like Ant? Junit testing?
The way that I am doing everything just seems so cumbersome and difficult
compared to using Struts and JDO before.Anything different takes adjusting to. Sounds like you know what you're doing for the most part. I agree, in terms of best practices what you have described so far sounds like a step backwards from what you were previously doing.
However I wouldn't go complaining about it too loudly, too quickly. If you're new on the block theres nothing like making a pain of yourself, and complaining how backwards the work they have done is to put your new workmates' backs up
Look on it as a challenge. Maybe discuss it quietly with a team leader, to see if they understand how much easier/better/less error prone such approaches can be?
Struts, cumbersome as it can be, definitely has the advantage of pushing you to follow good MVC practice.
Good luck,
evnafets

Internal links in portal (CSS, images, and other struts actions)

Good morning gurus! I have another question regarding Struts Portlets. We have an application that builds a page with an image that comes from the database. The application is composed of two Struts actions. One that's in charge of drawing the page and the other action is in charge of bringing the image from the database. The second action is called from a JSP (img src="/getImage.do"). In portal, once the portlet rendered the JSP it doesn't recongnize the other links inside the JSP (the call to the second action). Also, other links suchs as images, CSS, and others Struts actions are not recognized. How can I access images, links, and CSS from the main application (the actual application).
Best regards,
Marcelo Oliva
Message was edited by:
molivas08

Hi Andrew -
This is a pretty big topic for one thread ... I will try to provide some pointers on where to look for more information.
1. Need ability for non-html literate authors to update text, images and links on their portion of a shared web page
In the following whitepaper, see the section: Associated Funtion for Item Display
http://www.oracle.com/technology/products/ias/portal/pdf/oow_10gr2_1336_fender.pdf
This will allow you to prompt your non-HTML literate users for the "parts" to display and you worry about the UI.
2. Need ability to enforce common look and feel on content provided by non-html literate authors.
Create pages based on Templates. Templates can force the style on users. Again - do not use text items and the RTE for users, you control the display with an Associated Function.
3. Prefer ability to approve content before it goes live.
Grant content contributors "Manage with Approval" access
5. Need advanced search capabilities
Check out the search section on Portal OTN
http://www.oracle.com/technology/products/ias/portal/content_management_10gr2.html
Hope this helps,
Candace

Non-ascii, jsp-struts, not reciveing the correct value in the server

Hi,
I am developing JSP-Struts based application using tomcat server. In JSP struts form, when I put nonascii charater in the text field or text area, on the server side I recived twice of that non-ascii character..
for example, in the text field I entered following string:
------> This is text in tex field �
On the server side, I get the following:
------> This is text in tex field ��
Please notice, twice non ascii character.. :(
I don't know how to resolve this.. Any help will be greatly appricated..
Thanks,
Ajay

I changed the <form> in the jsp to div and its working fine. I do not need to have comments in JavaScript funcion() anymore. I don't know why that made the difference though? According to:
http://www.w3schools.com/tags/tag_form.asp
The <form> tag is used to create an HTML form for user input.
The <form> element can contain one or more of the following form elements:
<input>
<textarea>
<button>
<select>
<option>
<optgroup>
<fieldset>
<label>
An HTML form is used to pass data to a server.
I do have <button> and also send the data - the value of checkboxes - to server. So I think it should also work with <form>.
Please let me know if you have any idea. Thanks.

Newbie to JSP/Struts: Where to get started

I would like to begin experimenting with JSP and the struts framework. I'm a java newbie but a relatively quick learner.
First, what products do I need to use struts/JSP ?
I have 9iAS standard edition release 1.0.2.1 and an oracle database std edition without the JVM installed. Do I need the JVM in the database ? Can JSP use a JVM outside the database ? Do I need enterprise edition ?
Do I need Jdevelopper 9i or can I learn to use JSP with simple tools (HTML editor) first ?
Does struts need JSP 2.0 spec or the JSP 1.1 that comes with iAS 1.0.2.1 is OK ? Is JSP 2.0 = JSP 1.2 (Like J2EE = JDK1.2 and up) There is a lot of version/naming confusion going on in java, you got any site that can help me untangle this mess ?
Thanks a lot
You can reply to [email protected]

Thanks for your response.
We actually use oracle 8.1.7 and 9iAS (PL/SQL gateway and http server). We would like to jump on the Java Bandwagon before we are left in the dust. We first need to be able to understand a lot of technology/concepts/buzzwords.
We started basic Java programming (Applications) but would prefer to get an idea of "The big picture".
By that, I mean, we need to be able to understand/design/architect sound applications and be able to talk to the community and understand what they are saying. Right now, reading the media or forums is just a big bunch of buzzwords that are ever changing and we cannot get a grasp on it.
We not only need to get aquainted with the concepts, but we also need to be able to determine wether product xyz fits in the architecture, etc...
If you were to get a couple of good books to answer some questions, where would you begin ?
Kind of questions we might have are:
- What is the difference between Jserv and Tomcat ?
- What excatly is tomcat ? A replacement for Jserv ?
- Can Jserv be used as a container for struts apps or do you need tomcat ? If you need tomcat, does it come with some version of 9ias ?
- What is a java web service ?
- I read a lot about Enterprise Java Beans etc.. What are they, what are there purpose ? It seems like it is a standard, what are they used for ? If it is a standard, does this mean that If I buy a set of EJB from a vendor, it would offer the same beans as another vendor ? Is Oracle BC4J an implementation of EJB with added functionality ? Is it proprietary ?
- Buzzwords everywhere: MVC, EJB, J2EE, BC4J etc.. What are the definitions.
- Is oracle's java vision proprietary or are they really following the rest of the world ? For example, is BC4J compatible with EJB ?
- What is a Framework
- What exactly is JSP.
- Can STRUTS be used to access an oracle database ? If so, what are the required components (I guess you need JDBC or SQLJ) but does the oracle database need to be java enabled ?
- Even if you use oracle 9ias as an application server, can you use non-proprietary development methods/architectures/techniques that could be easily implemented somewhere else using another vendor's application server (Ex: Apache + Tomcat, WebSphere, etc...)
- Struts seems to be an interesting thing. I see that it was developped to encourage code reuse and prevent everyone from reinventing the wheel. But I cannot understand what exactly a developper had to write before struts was there. I mean, there must be alternatives to strut, if so what is the purpose of the framework ?
A lot of questions, but we need to understand the basics before we jump on the java bandwagon. If we wait, we'll be left in the dust and we need to keep current.
Thanks in advance.

Deploy BC4J/JSP-Struts to IAS

HI,
I'm trying to deploy a BC4J/JSP-Struts application to IAS. This application was developed with JDeveloper 9.0.3.
I can deploy this application to a Standalone OC4J (delivered with JDeveloper 9.0.3) on Windows2000 without problem.
Then I want to deploy this application on Oracle9iAS 9.0.2. For this I create an .EAR file with JDeveloper and I start the OC4J Administrator tools from Oracle9iAS and deploy my application.
I start the application with
http://erbium.int.imd.ch:7778/InvoicesInterface/main.jsp?user=x-XxX
and I become the menu without Problem.
Then I click on the link
http://erbium.int.imd.ch:7778/InvoicesInterface/VInvoiceUsersView1_Browse.do?user=x-XxX
and I become following :
HTTP 500 Internal server error
The page cannot be displayed
Did you have any Ideas ?
Thanks Yves
Configuration:
- Oracle9iAS (9.0.2) on Solaris
- JDeveloper9.0.3

Yves -
I am not able to pinpoint the exact error you are having but here are some obervations
a) You are going backwards in versions of OC4J when you deploy to 9iAS 902. If you are using JDev 903, then it is running with a local version of OC4J 903. When you are deploying to 9iAS 902, it's a earlier release of OC4J, so there may be an issue there. There is a 9iAS 903 version available from OTN that would be better to use in this case.
b) Is the struts framework packaged as part of the EAR file you are deploying? i'm not familiar with how BC4J and Struts apps are packaged from JDeveloper, but this is something to check on for sure. The local OC4J running inside of JDeveloper may have the Struts libs configured at the server level.
c) You might want to try and change the show-friendly-error-messages (or something like that) property inside of IE (if you are using it) so that it will display the stack trace the server might be sending. this may be of help to further locate the source of the problem (ClassNotFoundException, etc.).
-steve-

Applet and JSP Page

Hi.
I have a class called clsDbGrid under the ./classes/pkgDB and a JSP page under de ./web directory. I need to call the class from my JSP. I wrote the follow code:
   <applet class="clsDbGrid.class" width="640" height="480">
       The browse doesn't support JAVA
   </applet>But this code doesn't work. What's wrong? I put the entire path for package and doesn't work again.
Please, I'm beginner in Java and need a help.
Thanks.
Marco.
P.S - Sorry for my terrible english. I'm from Brazil.

See if this helps:
http://java.sun.com/docs/books/tutorial/deployment/applet/html.html

Frame issue in jsp/struts application

I have a problem with jsp struts application .
i have a jsp page which is inside a frame .
The action class which receives the request from this page redirects the request to another jsp page.
I want this new jsp page to be displayed without any frame , but it is getting displayed from inside the frame .
can anybody help me out ...
regards,
slam

Possibly:
1. Browser could be caching the page.
2. If you use a proxy, the proxy may be caching the page.
3. The page is not getting recompiled.

Dynamic Tree Creation using JSP, Struts framework

I urgently require tips/information/code snippet for creating a Dynamic Tree structure.
Tree is the hierarchical folder structure that we see in windows operating system.
Dynamic tree in the sense that all nodes shall be populated from database & a radio button shall be present at each node that can be selected & submitted to form.
Tree should be done using JSP (& if required Javascript).
I am using Struts framework .
[email protected]

u need to know quite a few java technologies to make archieve your dream.
JDBC, dynamic array and JSP.
after reading tutorial regarding to these 3 materials, you should be able to get your job done.

Ajax and JSP/Struts ... help

Similar Messages

Maybe you are looking for