Scope when using a JavaBean with JSP

what is the meaning of this question .....?
"Which of the following can not be used as the scope when using a JavaBean with JSP? "
question 4
site :http://java.sun.com/developer/Quizzes/jsptut/

The question is clearly written. I don't see how you can be confused. But let's assume you are since you would not have posed the question.
Dumbed-down:
There are 4 scopes or areas of variable visibility in JavaServer Pages. Which of those can areas can not be used with JavaBeans?
Does that help?

Similar Messages

Using java bean with jsp

hello friends,
i'm new to jsp. i want to create an html form that accepts username and a value from four radio buttons and display back the entered name and checked radio button's value using java bean.
i use the <jsp:setProperty id="" property="*"> method. i don't know how to access the radio buttons value from the html.
also when i use an additional field other than username the jsp page is showing error.
Please give me the correct method to use java bean with jsp in this circumstance.
thank you.

thank you, but i have a problem left. the case is like this.
i got the jsp and bean worked fine when i have a sinle input text field.
but when i added a second text field i recieved the following error.
javax.servlet.ServletException: basket.newbean.getUserPass()Ljava/lang/String;
     org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:825)
     org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:758)
     org.apache.jsp.newform.process_jsp._jspService(process_jsp.java:69)
     org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:94)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
     org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:324)
     org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
     org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
where userPass is the new form element. I have made the subsequent chanes in my bean program and jsp file.
pls hlp.

Why JavaBeans with JSP

Hi,
I know its an easy question and probably a silly one to ask, but still please take time to answer this. Why do we use JavaBeans with JSP to make use of reusable code. Cant we use simple classes for this?
Thanks in advance

Hi,
JavaBeans technology is the component architecture for the Java 2 Platform, Standard Edition (J2SE). Components (JavaBeans) are reusable software programs that you can develop and assemble easily to create sophisticated applications. By using Java beans, JSP allows you to keep much more of your code separate from the html than other html embedded languages. Java beans basically let you keep all the logic of your page (like the code to connect to a database, manipulate data etc�) in a separate file known as a Java bean. Then from within your html page - all you do is use one tag to 'use' the bean, and then a few other short tags to send data to and from the bean.
the website http://java.sun.com/products/jsp/html/jsptut.html is a good start, simple and easy understand.
Good luck!
jmling

Error when using %@ include file="/test.jsp"%&

UsingNitrox version 2.1 M3 (build 419 06022005):
with jdk version: 1.5.0_03 and Tomcat 5.5.9
This is the error :cry: when using <%@ include file="/test.jsp"%> in jsp:
Severity 2
The type java.lang.Object cannot be resolved. It is indirectly referenced from required .class files (test.jsp)
It used to work in previuos version of Nitrox. I can't use struts tiles because the tiles content is dynamic (run time) and I need it to be static (at compile time).
Have you encountered this problem? What is the fix? Nitrox bug?
I need your help please,
Alberto

M7,
I found the problem :wink: . In the java Build path having the default (ALL) is not picking up the content of the package. I had to use add multiple and include all the folders and subfolders (many L) in my packages. After that I added *.java and *.properties to select all the java files. Now it is working. I assume this is a bug in Nitrox. The default ALL should include the all the files in the path.
Thanks,
Alberto

[svn] 1720: Bugs: LCDS-304 - Authentication not working in all cases when using security constraint with NIO endpoints .

Revision: 1720
Author: [email protected]
Date: 2008-05-14 14:50:06 -0700 (Wed, 14 May 2008)
Log Message:
Bugs: LCDS-304 - Authentication not working in all cases when using security constraint with NIO endpoints.
QA: Yes
Doc: No
Details:
Update to the TomcatLoginCommand to work correctly with NIO endpoints.
Ticket Links:
http://bugs.adobe.com/jira/browse/LCDS-304
Modified Paths:
blazeds/branches/3.0.x/modules/opt/src/tomcat/flex/messaging/security/TomcatLoginCommand. java

Revision: 1720
Author: [email protected]
Date: 2008-05-14 14:50:06 -0700 (Wed, 14 May 2008)
Log Message:
Bugs: LCDS-304 - Authentication not working in all cases when using security constraint with NIO endpoints.
QA: Yes
Doc: No
Details:
Update to the TomcatLoginCommand to work correctly with NIO endpoints.
Ticket Links:
http://bugs.adobe.com/jira/browse/LCDS-304
Modified Paths:
blazeds/branches/3.0.x/modules/opt/src/tomcat/flex/messaging/security/TomcatLoginCommand. java

Using a JavaBean in JSP

Hello,
I am very new at this, and I am doing a very simple tutorial to use a JavaBean in JSP. I have followed all the procedures from my tutorial, and I get the following error:
org.apache.jasper.JasperException: Can't find a method to write property 'make' of type 'java.lang.String' in a bean of type 'com.wrox.cars.CarBean'
I have the bean:
package com.wrox.cars;
import java.io.Serializable;
public class CarBean implements Serializable {
private String make = "Ford";
public CarBean(){
public String getMake(){
return make;
public void SetMake(String make)
this.make = make;
and the JSP:
<jsp:useBean id="myCar" class="com.wrox.cars.CarBean" />
I have a <jsp:getProperty name="myCar" property="make" /><br>
<jsp:setProperty name="myCar" property="make" value="Ferrari" />
Now I have a <jsp:getProperty name="myCar" property="make" /><br>
The only thing I am missing is this step, where I have been looking for these JAR files and can't find them
I have downloaded many JSTL libraries, and still can't find them/
- dom.jar
- jaxp-api.jar
- jdbc2_0-stdext.jar
- sax.jar
- xalan.jar
- xercesImpl.jar
I really appreciate any help.

Thanks a lot.
Although I should know that, it seems that the error was in the tutorial.
Thanks again,

Strange behaviour when using connection pooling with proxy authentication

All
I have developed an ASP.NET 1.1 Web application that uses ODP.NET 9.2.0.4 accessing Oracle Database 8i (which is to be upgraded to 10g in the coming months). I have enabled connection pooling and implemented proxy authentication.
I am observing a strange behaviour in the live environment. If two users (User 1 and User 2) are executing SQL statements at the same time (concurrent threads in IIS), the following is occurring:
* User 1 opens a new connection, executes a SELECT statement, and closes this connection. The audit log, which uses the USER function, shows User 1 executed this statement.
* User 2 opens the same connection (before it is released to the connection pool?), excutes an INSERT statement, and closes this connection. The audit log shows User 1, not User 2, executed this statement.
Is this a known issue when using connection pooling with proxy authentication? I appreciate your help.
Regards,
Chris

Hi Chris,
I tried to reproduce your complaint, but was unable to. I didnt use auditting however, just a series of "select user from dual" with proxy authentication. You might want to see if you can put together a small complete testcase for this and open a sr with support.
Cheers
Greg

When using Camera raw with PS12 after editing, I cannot save my file in JPEG, only DNG

When using Camera RAW after editing photo I can only save file as DNG, I want to save as JPEG. HOW??
THANKS LLOYD

BARBARA,Yes, you are so right, I was deceived by the eve button, Just tried it and it WORKS GREAT-Thanks for the help.
THANKS AGAIN AND HAVE A GOOD DAY Lloyd
From: Barbara B. <[email protected]>
To: Lloyd Bennett <[email protected]>
Sent: Tuesday, January 13, 2015 11:46 AM
Subject: When using Camera raw with PS12 after editing, I cannot save my file in JPEG, only DNG
When using Camera raw with PS12 after editing, I cannot save my file in JPEG, only DNG
created by Barbara B. in Photoshop Elements - View the full discussionYou are being deceived by the Save button, like most people. That button is not the Save As button, really, but a link to the DNG converter. To save your raw file in an image format, click the Open button instead and then save in the format of your choice in the editor. If the reply above answers your question, please take a moment to mark this answer as correct by visiting: https://forums.adobe.com/message/7092207#7092207 and clicking ‘Correct’ below the answer Replies to this message go to everyone subscribed to this thread, not directly to the person who posted the message. To post a reply, either reply to this email or visit the message page: Please note that the Adobe Forums do not accept email attachments. If you want to embed an image in your message please visit the thread in the forum and click the camera icon: https://forums.adobe.com/message/7092207#7092207 To unsubscribe from this thread, please visit the message page at , click "Following" at the top right, & "Stop Following" Start a new discussion in Photoshop Elements by email or at Adobe Community For more information about maintaining your forum email notifications please go to https://forums.adobe.com/thread/1516624.

How to avoid data repetation when using select statements with innerjoin

how to avoid data repetation when using select statements with innerjoin.
thanks in advance,
satheesh

you can use a query like this...
SELECT DISTINCT
         frg~prc_group1                  "Product Group 1
         frg~prc_group2                  "Product Group 2
         frg~prc_group3                  "Product Group 3
         frg~prc_group4                  "Product Group 4
         frg~prc_group5                  "Product Group 5
         prc~product_id                  "Product ID
         txt~short_text                  "Product Description
UP TO 10 ROWS
INTO TABLE l_i_data
FROM
Joining CRMM_PR_SALESG and
COMM_PR_FRG_ROD
crmm_pr_salesg AS frg
INNER JOIN comm_pr_frg_rod AS prd
ON frgfrg_guid = prdfragment_guid
Joining COMM_PRODUCT and
COMM_PR_FRG_ROD
INNER JOIN comm_product AS prc
ON prdproduct_guid = prcproduct_guid
Joining COMM_PRSHTEXT and
COMM_PR_FRG_ROD
INNER JOIN comm_prshtext AS txt
ON prdproduct_guid = txtproduct_guid
WHERE frg~prc_group1 IN r_zprc_group1
   AND frg~prc_group2 IN r_zprc_group2
   AND frg~prc_group3 IN r_zprc_group3
   AND frg~prc_group4 IN r_zprc_group4
   AND frg~prc_group5 IN r_zprc_group5.
reward it it helps
Edited by: Apan Kumar Motilal on Jun 24, 2008 1:57 PM

How do you stop needing to verify email password when using yahoo.att with Mac Mail

How do you stop needing to verify email password when using yahoo.att with Mac Mail?

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why my iphone 4s getting hot when using 3g plus with data?
then my phone left side speaker didnt work when i list songs?

It is normal for the phone to get hot when your using data such as YouTube videos, streaming music etc.. And as for the left speaker not working, the left speaker is a microphone, the right one is for sound. Don't worry, everything your iPhone is doing is normal.

HT201335 when using apple tv with my ipad, the mirroring function does not work, screen goes black, what is the issue?

when using apple tv with my ipad, the mirroring function does not work, screen goes black, what is the issue? My son's Ipad(same as kind as mine) works ok with the apple tv but mine does not. Any suggestions?

Hello Nina Izurin,
While written for the iPhone, the troubleshooting below can help resolve issues with your iPad's camera, as well.
Camera isn't functioning or has undesired image quality
If the screen shows a closed lens or black image, force quit the Camera app.
If you do not see the Camera app on the Home screen, try searching for it in Spotlight. If the camera does not show up in the search, check to make sure that Restrictions are not turned on by tappingSettings > General > Restrictions.
Ensure the camera lens is clean and free from any obstructions. Use a microfiber polishing cloth to clean the lens.
Cases can interfere with the camera and the flash. Try gently cleaning the lens with a clean dry cloth or removing the case if you see image or color-quality issues with photos.
Try turning iPhone off and then back on.
Tap to focus the camera on the subject. The image may pulse or briefly go in and out of focus as it adjusts.
Try to remain steady while focusing:
Still images: Remain steady while taking the picture. If you move too far in any direction, the camera automatically refocuses to the center.
Note: If you take a picture with iPhone turned sideways, it is automatically saved in landscape orientation.
Video: Adjust focus before you begin recording. You can also tap to readjust focus while recording. Exiting the Camera application while recording will stop recording and will save the video to the Camera Roll.
Note: Video-recording features are not available on original iPhone or iPhone 3G.
If your iPhone has a front and rear camera, try switching between them to verify if the issue persists on both.
My issue is still not resolved. What do I do next?
Contact Apple Support.
iPhone: Hardware troubleshooting
http://support.apple.com/kb/TS2802
Cheers,
Allen

How to use a JavaBean with request scope from one page to other page

Hi,
I want to use in one jsp file a javabean with scope of request for it, I use:
<jsp:useBean id="entry" class="jsps.SaleEntry" scope="request" />and after in that page I make operations with it using the jsp:setProperty and jsp:getProperty operations
My question is that if I want to get the result of that javabean in the following page, Have I to record the javabean doing : request.setAttribute(""objectId",id) and then in the following jsp page I can rescue the object doing: SaleEntry sE=(SaleEntry) request.getAttribute("objectId") ???
or in the contrary, only using jsp:setProperty the information is available to recover it in the following jsp doing : SaleEntry sE=(SaleEntry) request.getAttribute("objectId") because setProperty records the information without need of doing : request.setAttribute(""objectId",id). ????
Thanks with anticipation and sorry if it is a silly question but I am beginner in the use of JavaBeans

Thanks Anthony,
I'm working with Tigi on the same project and now I can tell you that the problem is solved.
request.getRequestDisptacher("/myServlet");hehe, you switched the 't' and the 'a'
<%@ include file="/myServlet" %>this is the one we use :)
But what is the difference between the first one and the last one? Now We are using the last one because that's the shortest :) not a pretty good reason huh :)
cheers,
Soep

Java Bean scope when used with the JPDK

Portal 3.0.9.8.4 and Jserv
When using JSPs with Java Beans and the JPDK I have noticed problems when setting the scope attribute of the useBean action to something other than "page". For example, <jsp:useBean id="provider" scope="session" class="MyClass" /> causes a java.lang.ClassCastException when there are more than two JSP portlets than attempt to access the ProviderSession object.
Does anyone know what value the JSP scope should be set to when you want the JSPs read/write to the ProviderSession?

The behavior you report is an expected one as your keys of objects on session are not unique to the two portlet instances. Two portlets with the same session object (may have been deployed on the same Portal page), are sharing the same object put on session, thus resulting in thread conflicts. What you need to do is to generate unique keys for objects stored for each portlet instance.
For example, instead of having the id as "provider", you should have it as <portlet instance name> + "provider".
You are not experiencing the same behavior in "request" or "page" scope, as in these scopes, the objects are not shared across portlet instances.
Please let me know if my interpretation of your issue is wrong.
Regards,
Abhinav

Exception report when using tomcat 5 with JDBC

i followed this guide to setup the JDBC with my TOMCAT 5
http://jakarta.apache.org/tomcat/tomcat-5.0-doc/jndi-datasource-examples-howto.html#Database%20Connection%20Pool%20(DBCP)%20Configurations
but i seem to get this error
exception
javax.servlet.ServletException: Unable to get connection, DataSource invalid: "org.apache.commons.dbcp.SQLNestedException: Cannot create JDBC driver of class '' for connect URL 'null'"
     org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:846)
     org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:779)
     org.apache.jsp.SID.test_jsp._jspService(test_jsp.java:81)
     org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:94)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
     org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:324)
     org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
     org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
root cause
javax.servlet.jsp.JspException: Unable to get connection, DataSource invalid: "org.apache.commons.dbcp.SQLNestedException: Cannot create JDBC driver of class '' for connect URL 'null'"
     org.apache.taglibs.standard.tag.common.sql.QueryTagSupport.getConnection(QueryTagSupport.java:276)
     org.apache.taglibs.standard.tag.common.sql.QueryTagSupport.doStartTag(QueryTagSupport.java:159)
     org.apache.jsp.SID.test_jsp._jspx_meth_sql_query_0(test_jsp.java:100)
     org.apache.jsp.SID.test_jsp._jspService(test_jsp.java:58)
     org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:94)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
     org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:324)
     org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
     org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
i can compile *.java and run them when they need the jdbc drivers to interact with mysql 5 database.
This is my server.xml



<Server port="8005" shutdown="SHUTDOWN" debug="0">


<Listener className="org.apache.catalina.mbeans.ServerLifecycleListener"
debug="0"/>
<Listener className="org.apache.catalina.mbeans.GlobalResourcesLifecycleListener"
debug="0"/>

<GlobalNamingResources>

<Environment name="simpleValue" type="java.lang.Integer" value="30"/>

<Resource name="UserDatabase" auth="Container"
type="org.apache.catalina.UserDatabase"
description="User database that can be updated and saved">
</Resource>
<ResourceParams name="UserDatabase">
<parameter>
<name>factory</name>
<value>org.apache.catalina.users.MemoryUserDatabaseFactory</value>
</parameter>
<parameter>
<name>pathname</name>
<value>conf/tomcat-users.xml</value>
</parameter>
</ResourceParams>
</GlobalNamingResources>


<Service name="Catalina">


<Connector port="8080"
maxThreads="150" minSpareThreads="25" maxSpareThreads="75"
enableLookups="false" redirectPort="8443" acceptCount="100"
debug="0" connectionTimeout="20000"
disableUploadTimeout="true" />

     



<Connector port="8009"
enableLookups="false" redirectPort="8443" debug="0"
protocol="AJP/1.3" />






<Engine name="Catalina" defaultHost="localhost" debug="0">



<Logger className="org.apache.catalina.logger.FileLogger"
prefix="catalina_log." suffix=".txt"
timestamp="true"/>


<Realm className="org.apache.catalina.realm.UserDatabaseRealm"
debug="0" resourceName="UserDatabase"/>







<Host name="localhost" debug="0" appBase="webapps"
unpackWARs="true" autoDeploy="true"
xmlValidation="false" xmlNamespaceAware="false">








<Logger className="org.apache.catalina.logger.FileLogger"
directory="logs" prefix="localhost_log." suffix=".txt"
timestamp="true"/>
          <Context path="/testdb" docBase="APACHE_DIR/htdocs/testdb"
debug="5" reloadable="true" crossContext="true">
<Logger className="org.apache.catalina.logger.FileLogger"
prefix="localhost_DBTest_log." suffix=".txt"
timestamp="true"/>
<Resource name="jdbc/TestDB"
auth="Container"
type="javax.sql.DataSource"/>
<ResourceParams name="jdbc/TestDB">
<parameter>
<name>factory</name>
<value>org.apache.commons.dbcp.BasicDataSourceFactory</value>
</parameter>

<parameter>
<name>maxActive</name>
<value>10</value>
</parameter>

<parameter>
<name>maxIdle</name>
<value>5</value>
</parameter>

<parameter>
<name>maxWait</name>
<value>10000</value>
</parameter>

<parameter>
<name>username</name>
<value>test</value>
</parameter>
<parameter>
<name>password</name>
<value>testpwd</value>
</parameter>

<parameter>
<name>driverClassName</name>
<value>com.mysql.jdbc.Driver</value>
</parameter>

<parameter>
<name>url</name>
<value>jdbc:mysql://localhost/testdb?autoReconnect=true</value>
</parameter>
</ResourceParams>
     </Context>
</Host>
</Engine>
</Service>
</Server>

You haven't added a resource reference for your web application that gives the application a local name for the global resource "UserDatabase".

Scope when using a JavaBean with JSP

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