Requirement of JSTL when studying Java EE

2018-07-12 06:45 Satnam123 imported from Stackoverflow

Does I need to study JSTL in java EE. I'm studying java EE, does studying JSTL gives any advantage if it is not a part of java EE. Thanks in advance.

See also questions close to this topic

Background and button issue

Having trouble running this code:

import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.image.Image;
import javafx.scene.image.ImageView;
import javafx.scene.layout.HBox;
import javafx.stage.Stage;
import javafx.scene.control.Label;
import javafx.scene.control.Button;
import javafx.scene.paint.Color;
import javafx.scene.shape.Circle;
import javafx.scene.text.Font;
import javafx.scene.text.Text;
import javafx.scene.Group;
import javafx.scene.layout.BorderPane;
import javafx.scene.layout.BackgroundSize;
import javafx.scene.layout.Background;
import javafx.scene.layout.BackgroundImage;
import javafx.scene.layout.BackgroundRepeat;
import javafx.scene.layout.BackgroundPosition;
import javafx.event.ActionEvent;

import java.io.FileInputStream;

public class Main extends Application  {

@Override
public void start(Stage primaryStage) throws Exception {
    BackgroundImage backgroundImage = new BackgroundImage( new Image( getClass().getResource("src/sample/Image/backg.jpg").toExternalForm()), BackgroundRepeat.NO_REPEAT, BackgroundRepeat.NO_REPEAT, BackgroundPosition.DEFAULT, BackgroundSize.DEFAULT);
    Background background = new Background(backgroundImage);

    Button button = new Button( "Click me!");
    button.setBackground(background);

    Scene scene = new Scene(backgroundImage, 600, 400);

    primaryStage.setScene(scene);
    primaryStage.show();
}



public static void main(String[] args) {
    Application.launch(args);
}

I'm trying to display button over a background but despite that I'm facing a lot of issues. I don't quite really understand how "Scene" class works so I'm feeling I made mistake there. I'm getting this error message:

Error:(38, 33) java: incompatible types: javafx.scene.layout.BackgroundImage cannot be converted to javafx.scene.Parent

38 and 33 which is:

Background background = new Background(backgroundImage);
Scene scene = new Scene(backgroundImage, 600, 400);

Thanks

Query Syntax Exception when creating hibernate native query

The repository method used to create the query is shown in the code below.

@Override
public Long findTotalCountSentToLiveRequiredExecutionsFiltered(String searchString) {
    final StringBuilder queryString = new StringBuilder("SELECT count(fk_script) FROM ");
    queryString.append("ses_script s INNER JOIN ses_database d INNER JOIN "
            +"(SELECT * FROM ses_req_execution re WHERE re.sent_to_live = 1 "
            +"AND re.fk_database NOT IN "
            +"(SELECT e.fk_database FROM dbo.ses_execution e WHERE e.fk_script = re.fk_script)"
            +") AS a ON d.id = a.fk_database ON s.id = a.fk_script INNER JOIN ses_user u "
            +"ON s.fk_created_by_user = u.id "
            +"WHERE CONCAT (d.name, '', s.filename, '', u.username, '') LIKE :searchString");

    final Query query = this.em.createQuery(queryString.toString());
    query.setParameter("searchString","%" + searchString + "%");

    LOGGER.debug("Created query: "+queryString.toString());
    return (Long) query.getSingleResult();
}

This triggers a Query Syntax Exception on line 80 as shown here:

SEVERE: Servlet.service() for servlet [dispatcher] in context with path [/ses-web] threw exception [Request processing failed; nested exception is org.springframework.dao.InvalidDataAccessApiUsageException: org.hibernate.hql.internal.ast.QuerySyntaxException: unexpected token: ( near line 1, column 80 [SELECT count(fk_script) FROM  ses_script s INNER JOIN ses_database d INNER JOIN (SELECT * FROM ses_req_execution re WHERE re.sent_to_live = 1 AND re.fk_database NOT IN (SELECT e.fk_database FROM dbo.ses_execution e WHERE e.fk_script = re.fk_script)) AS a ON d.id = a.fk_database ON s.id = a.fk_script INNER JOIN ses_user u ON s.fk_created_by_user = u.id WHERE CONCAT (d.name, '', s.filename, '', u.username, '') LIKE :searchString]; nested exception is java.lang.IllegalArgumentException:                 
org.hibernate.hql.internal.ast.QuerySyntaxException: unexpected token: ( near line 1, column 80 [SELECT count(fk_script) FROM  ses_script s INNER JOIN ses_database d INNER JOIN (SELECT * FROM ses_req_execution re WHERE re.sent_to_live = 1 AND re.fk_database NOT IN (SELECT e.fk_database FROM dbo.ses_execution e WHERE e.fk_script = re.fk_script)) AS a ON d.id = a.fk_database ON s.id = a.fk_script INNER JOIN ses_user u ON s.fk_created_by_user = u.id WHERE CONCAT (d.name, '', s.filename, '', u.username, '') LIKE :searchString]] with root cause
org.hibernate.hql.internal.ast.QuerySyntaxException: unexpected token: ( near line 1, column 80 [SELECT count(fk_script) FROM  ses_script s INNER JOIN ses_database d INNER JOIN (SELECT * FROM ses_req_execution re WHERE re.sent_to_live = 1 AND re.fk_database NOT IN (SELECT e.fk_database FROM dbo.ses_execution e WHERE e.fk_script = re.fk_script)) AS a ON d.id = a.fk_database ON s.id = a.fk_script INNER JOIN ses_user u ON s.fk_created_by_user = u.id WHERE CONCAT (d.name, '', s.filename, '', u.username, '') LIKE :searchString]
at org.hibernate.hql.internal.ast.QuerySyntaxException.convert(QuerySyntaxException.java:91)
at org.hibernate.hql.internal.ast.ErrorCounter.throwQueryException(ErrorCounter.java:109)
at org.hibernate.hql.internal.ast.QueryTranslatorImpl.parse(QueryTranslatorImpl.java:304)
at org.hibernate.hql.internal.ast.QueryTranslatorImpl.doCompile(QueryTranslatorImpl.java:203)
at org.hibernate.hql.internal.ast.QueryTranslatorImpl.compile(QueryTranslatorImpl.java:158)
at org.hibernate.engine.query.spi.HQLQueryPlan.<init>(HQLQueryPlan.java:126)
at org.hibernate.engine.query.spi.HQLQueryPlan.<init>(HQLQueryPlan.java:88)
at org.hibernate.engine.query.spi.QueryPlanCache.getHQLQueryPlan(QueryPlanCache.java:167)
at org.hibernate.internal.AbstractSessionImpl.getHQLQueryPlan(AbstractSessionImpl.java:301)
at org.hibernate.internal.AbstractSessionImpl.createQuery(AbstractSessionImpl.java:236)
at org.hibernate.internal.SessionImpl.createQuery(SessionImpl.java:1800)
at org.hibernate.jpa.spi.AbstractEntityManagerImpl.createQuery(AbstractEntityManagerImpl.java:328)
at sun.reflect.GeneratedMethodAccessor55.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.springframework.orm.jpa.ExtendedEntityManagerCreator$ExtendedEntityManagerInvocationHandler.invoke(ExtendedEntityManagerCreator.java:342)
at com.sun.proxy.$Proxy54.createQuery(Unknown Source)
at sun.reflect.GeneratedMethodAccessor55.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.springframework.orm.jpa.SharedEntityManagerCreator$SharedEntityManagerInvocationHandler.invoke(SharedEntityManagerCreator.java:289)
at com.sun.proxy.$Proxy51.createQuery(Unknown Source)
at rs.naovis.repo.impl.RequiredExecutionRepositoryImpl.findTotalCountSentToLiveRequiredExecutionsFiltered(RequiredExecutionRepositoryImpl.java:132)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.executeMethodOn(RepositoryFactorySupport.java:344)
at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.invoke(RepositoryFactorySupport.java:319)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:98)
at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:266)
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:95)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:136)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.data.jpa.repository.support.LockModeRepositoryPostProcessor$LockModePopulatingMethodIntercceptor.invoke(LockModeRepositoryPostProcessor.java:92)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:207)
at com.sun.proxy.$Proxy64.findTotalCountSentToLiveRequiredExecutionsFiltered(Unknown Source)
at rs.naovis.service.RequiredExecutionServiceImpl.findResultNumber(RequiredExecutionServiceImpl.java:320)
at rs.naovis.controller.ExecutionController.handleGetReqExecutionsByPageResultNumber(ExecutionController.java:575)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.springframework.web.method.support.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:215)
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:132)
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:104)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:781)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:721)
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:83)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:943)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:877)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:961)
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:852)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:618)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:837)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:725)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:291)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:219)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:504)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:142)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:610)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:534)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1081)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:658)
at org.apache.coyote.http11.Http11NioProtocol$Http11ConnectionHandler.process(Http11NioProtocol.java:222)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1566)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1523)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:748)

The thing is, I created the same query in SQL Server Management Studio that runs without a hitch ('%da%' is just an example string here):

SELECT count(fk_script) FROM ses_script s INNER JOIN ses_database d INNER JOIN (SELECT * FROM ses_req_execution re WHERE re.sent_to_live = 1 AND re.fk_database NOT IN (SELECT e.fk_database FROM dbo.ses_execution e WHERE e.fk_script = re.fk_script)) AS a ON d.id = a.fk_database ON s.id = a.fk_script INNER JOIN ses_user u ON s.fk_created_by_user = u.id WHERE CONCAT (d.name, '', s.filename, '', u.username, '') LIKE '%da%'

I checked the syntax over and over, I am not sure why the "(" is triggering the exception when the query is created though hibernate. I also use and almost identical query, the only difference being it is without "count" that throws no exceptions.

Does anyone see where the problem is here?

no such bean exception

Unable to resolve this error. Trying an example of spring dependency injection. I'm getting the error "No bean named 'book' is defined even though i have defined it in the xml file. I need to print author and title as defined in the xml to console.

Error :

Sep 21, 2018 3:05:23 AM org.springframework.context.annotation.AnnotationConfigApplicationContext prepareRefresh INFO: Refreshing org.springframework.context.annotation.AnnotationConfigApplicationContext@37bba400: startup date [Fri Sep 21 03:05:23 MDT 2018]; root of context hierarchy Exception in thread "main" org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named 'book' is defined at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeanDefinition(DefaultListableBeanFactory.java:701) at org.springframework.beans.factory.support.AbstractBeanFactory.getMergedLocalBeanDefinition(AbstractBeanFactory.java:1180) at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:284) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202) at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1082) at com.Rawal.Srishti.SDI.Driver_new.main(Driver_new.java:10)

    Book class :

    package com.Rawal.Srishti.SDI;

    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.stereotype.Component;

    @Component
    class Book extends Media {
        private static int order = 1;
        private String author;
        @Autowired
        public Book(String title, String author) {
            this.title = title;
            this.author = author;
        }

        public String getAuthor() {
            return author;
        }
        public String getTitle() {
            return title;
        }
        static public int getOrder() {
            return order;
        }
        @Override
        protected String compareString() {
            return getOrder() + getTitle() + getAuthor();
        }
        public String toString() {
            return getTitle() + " by " + getAuthor();
        }

        public int compareTo(Media obj) {
            if(obj instanceof Book) {
                return -(this.getTitle().compareTo(obj.getTitle()));
            } 

            return 444;

        }
    }


    Driver class:

    package com.Rawal.Srishti.SDI;

    import org.springframework.context.ApplicationContext;
    import org.springframework.context.annotation.AnnotationConfigApplicationContext;
    public class Driver_new {
        public static void main(String[] args) {
              @SuppressWarnings("resource")
            ApplicationContext ctx = 
                 new AnnotationConfigApplicationContext("Rawal_spring.xml");
              Book m = (Book) ctx.getBean("book", Book.class);
              System.out.println(m.getTitle());
              System.out.println(m.getAuthor());
        }
    }


XML :

<?xml version="1.0" encoding="UTF-8"?>

<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
    http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">

    <bean id = "book" class = "com.Rawal.Srishti.SDI.Book" >
        <constructor-arg index="0" ref="Srishti" />
        <constructor-arg index="1" ref="Rawal"/>
    </bean>

</beans>

JSP code is cut off on Resin Server 4.0.40
We wrote codes and tested on Tomcat7 server. There was no error. Then, when after distributing on Resin server, some pages were cut off. We checked this by response file on Chrome developer tools. (The jsp file size on response was 4KB.)

The code we're expecting is like this:
```

...



...



...

```
And the cut-off jsp file is like this:
```

...



... 

```
The tail of content page code and the head of footer code are cut off. And rest code of them are located just after next line as they are not cut off.

The actual code(attritubes are skipped):
```
<div>
    <ul class="class1">
        <li v-if="trueOrFalse">
            <span>Some Text</span>
            <span v-text="stageInfo.info[stageIndex].startDt"></span>
            ~
            <span v-text="stageInfo.info[stageIndFOOTER_TEXT" /> 
        </a>
        <div>
            <a class="btn btn-secondary dropdown-toggle" href="#" role="button">

```
As you can see, <span v-text="stageInfo.info[stageIndFOOTER_TEXT" />, it is cut off unexpectedly. It also happens if there's no vue code.

There are some methods we've tried:
1. Minimize Code
Errors(Cut-offs) usually occured on long pages, so we rearranged codes and seperated JavsScript codes from JSP codes. Part of error were solved.
1. Use JSP Buffer Settings
We thought this is relevant to JSP file size, so read the resin server document. But we only find this, the method using JSP Buffer settings.

On the top of JSP code, we set JSP buffer settings:

<%@ page buffer="1024kb" autoFlush="true" %>

This was effective for some pages. But there are some cut-off pages left.

Is there anyone who experienced like this, and solved? Unfortunately the server is only opened to some IP addresses, so you couldn't see it. Thank you for reading.
How do I fix it when I enter the name of a new student and select a teacher from the selectbox in the database, besides student id, the teacher's id?

I have 3 tables in my workbench. Student, Teacher, Student_teacher The database saves the names and updates the list of students.

Importing a new teacher is provided by a controller: https://hastebin.com/ecegalecum.java

The new student controller is the same. However, .jsp would be this: https://hastebin.com/lucipuxaxi.xml

My question would be the following. How do I fix it when I enter the name of a new student and select a teacher from the selectbox in the database (Teacher_diamonds), besides student id, the teacher's id? So far I've managed to create a new controller for this.

Student repository: https://hastebin.com/ejumugikam.css

Student entity: https://hastebin.com/izomeharur.java

A work with STS, MySQL Workbench.

Thanks,

Adam

Jnlp argument does not change

I am trying to bring from a jsp page a parameter into my java application. As it is right now , I open one instance of that application from the jsp page with 1 parameter , and if I try to open a second application, from the same jsp page but with a different parameter , the app opens with the same parameter as the first application that was oppened. This is the best case scenario. The worst one is that both applications get 0 as a parameter.

JSP page code

if(parseInt(numberOfPlayers) == 2) 
{
    window.location.href = "http://localhost:8080/GamePlatformCore/PairsJnlpGenerator?lobbyId=<%=lobbyId%>";

    clearInterval(refreshReady);                                                         
    clearInterval(refreshLobby);
}

PairsJnlpGenerator

@WebServlet("/PairsJnlpGenerator")
public class PairsJnlpGenerator extends HttpServlet {
private static final long serialVersionUID = 1L;
private static Logger logger = LoggerFactory.getLogger(JnlpGenerator.class);

/**
 * @see HttpServlet#HttpServlet()
 */
public PairsJnlpGenerator() {
    super();
}

/**
 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse
 *      response)
 */
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response) {
    HttpSession session = request.getSession();
    String name = (String) session.getAttribute("name");
    int id = DBConnect.getIdByName(name);
    request.setAttribute("id", id);
    String lobbyId = request.getParameter("lobbyId");
    request.setAttribute("lobbyId", lobbyId);
    response.setContentType("application/x-java-jnlp-file");
    try {
        request.getRequestDispatcher("PairsJnlp.jsp").include(request, response);
    } catch (ServletException | IOException e) {
        logger.error("Error " + e);
    }
}

/**
 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse
 *      response)
 */
@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response) {
    doGet(request, response);
}
}

PairsJnlp.jsp

<%@ page import="java.io.*" %>
<% response.setContentType("application/x-java-jnlp-file"); %>
<%int id = Integer.parseInt(request.getAttribute("id").toString()); 
int lobbyId = Integer.parseInt(request.getAttribute("lobbyId").toString());%>
<?xml version="1.0" encoding="utf-8"?>
<jnlp spec="1.0+" codebase="http://localhost:8080/GamePlatformCore">   

<information>        
    <title>Jnlp Testing</title>        
    <vendor>YONG MOOK KIM</vendor>        
    <homepage href="http://localhost:8080/GamePlatformCore" />        
    <description>Testing Testing</description>    
</information>    
<security>        
    <all-permissions/>    
</security>    
<resources>        
    <j2se version="1.6.10+" href="http://java.sun.com/products/autodl/j2se"
java-vm-args="-Djava.net.preferIPv4Stack=true"/>      
    <jar href="pairs.jar" />    
</resources>     
<application-desc main-class="gui.Start">
    <argument><%=id%></argument>
      <argument><%=lobbyId%></argument>

I followed this tutorial : JNLP Tutorial

Link example : localhost:8080/GamePlatformCore/PlatformPairsLobby?param=anna

% in URL redirecting to HTTP ERROR 400 intead of default error page
I have used java servlets in Backend and Angular UI In my web.xml I have added below code to redirect any invalid URL's
```
<error-page>
    <location>/assets/error.html</location>
</error-page>
```
This is working fine except for %. When I enter % after my URL it gives HTTP ERROR 400

How can I redirect even this to /assets/error.html ?

Below is the behavior when I add "&" and it is expected behavior as it redirects to my error page:

Please help.
Pass data to Servlet on a button click

I have a jsp page which displays the images from the servlet along with its name and category. And in Jsp page each image has a button to click on. Now my problem is how to send the data (name and category) of an image on a button click to the servlet. So that in servlet, i can perform some activity based on the name and category.

I tried using <input type= "hidden" name= "name" value= <%= value%> >, i am getting the values of the last image displayed in the jsp, whatever button i clicked in Jsp.

Can any body help me in this regard.

Thank you.

Error occurred while starting websphere application server

Below is the error

[9/19/18 14:51:09:992 EDT] 0000001c ServletWrappe E Uncaught init() exception thrown by servlet SSOManager
[9/19/18 14:51:09:992 EDT] 0000001c ServletWrappe E Deregister the mbean because of uncaught init() exception thrown by servlet SSOManager: javax.servlet.ServletException: Failed to get KSData on the following server default on all server instances. Please make sure awson Security Server is running.

Could anyone help?

Drag & drop from outside the browser

I didn't find a documentation of how to handle dropping of URLs or media files from outside into a Primefaces web app (browser). There are four examples at https://www.primefaces.org/showcase/ui/dnd but they only handle drag & drop inside the web app.
Where is Windows 32-bit installer for OpenShift CLI?

I'm trying to find an OpenShift CLI installer for Windows 32-bit. The only 32-bit installer I see is Linux. Please help! I am trying to deploy .war file onto an OpenShift server, but not able to because I can't find a 32-bit installer. Thank you!

I was looking in the git repo, and on the site

Git Repository

Openshift Site
How to test whether a websphere application server is up and running using socket connection

I am using cosnaming context factory in websphere. I need to write a java code for testing a socket connection where ip is like 127.0.0.1 and jndi port is "2809/NamingServiceRoot". I am not able to use Simple Socket constructor which takes port as int value.. and ip address. I need to set the initial context after checking which of the two webpshere application servers is up and running to provide high availability environment.
Is there a way to update an object attribute in JSP?
I am new to JSP and i am trying to update an existing object say obj in JSP.

Lets say the Class Foo of obj looks like
```
Class Foo{
    private Map<String,Bar> maps;
    private String myString;
    //Followed by getters and setters 
}

Class Bar{
String displayString;
//Followed by getters and setters
}
```
I tried <jsp:setProperty name="${obj.maps[obj.myString]}" property="displayString" value="Some_211" /> and this gives me NullPointerException

Can anybody suggest what i am doing wrong here?
using ForEach to loop a JSON array in JSP JSTL
I am trying to use a ForEach loop to iterate through my JSON array passed over from the controller and create a html element for each item in the array. However when i try to run my code, an exception occurred but the browser did not specify where exactly is that error.
```
   <c:forEach var = "i" begin = "0" end = '${notifications.length-1}'>
                Item <c:out value = "${i}"/><p>
            </c:forEach>    
```
Eventually, I want to create a
element for each item in the loop:
```
 <c:set var = "temp" value = "${notifications}"/>
           <c:set var = "string1" value = "${fn:substring(temp, 0, 16)}" />
          <p class="alert alert-info" data-toggle="tooltip" title='${notifications}'><strong>Info!</strong> ${string1 }...</p>
```
I am new to JSTL so I am not sure about the format. Would anyone be able to tell me what went wrong with my code ?

Custom Taglib tag could not be resolved

I have created my .tld file under WEB-INF folder.

Location : WEB-INF/urlUtils.tag

Then import in the jsp file as

Tried both of the following:
<%@ taglib tagdir="/WEB-INF/urlUtils.tag" prefix="urlutils" %>

<%@ taglib uri="http://global.ddd.no/tagsUtils/urls" prefix="urlutils" %>

Location : WEB-INF/jsp/elements/header_logo.jsp

Now in the jsp when I use <urlutils:urls value='${myurl}' /> That url could not be resolved

Here is that tag file.

<?xml version="1.0" encoding="UTF-8" ?>
<taglib xmlns="http://java.sun.com/xml/ns/javaee"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-jsptaglibrary_2_1.xsd"
    version="2.1">

<tlib-version>1.0</tlib-version>
<short-name>ddd-no-url-utils</short-name>
<uri>http://global.ddd.no/tagsUtils/urls</uri>
<tag>
    <name>urls</name>
    <tag-class>no.ddd.tag.util.TagUrlUtils</tag-class>
    <body-content>empty</body-content>
    <attribute>
        <name>value</name>
        <required>false</required>
        <rtexprvalue>true</rtexprvalue>
    </attribute>
    <attribute>
        <name>var</name>
        <required>false</required>
        <rtexprvalue>false</rtexprvalue>
    </attribute>
    <attribute>
        <name>scope</name>
        <required>false</required>
        <rtexprvalue>true</rtexprvalue>
    </attribute>
    <attribute>
        <name>scheme</name>
        <required>false</required>
        <rtexprvalue>true</rtexprvalue>
    </attribute>

</tag>

I also had included in web.xml , no good luck.

**What is wrong I am doing here. Any help will be appreciated **

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