Failed to load or instantiate TagLibraryValidator class

running the springMVC-petclinic-hibernate sample app,
got this:
SEVERE: Exception Processing ErrorPage[exceptionType=java.lang.Exception, location=/WEB-INF/jsp/uncaughtException.jsp]
org.apache.jasper.JasperException: /WEB-INF/jsp/uncaughtException.jsp(1,1) Failed to load or instantiate TagLibraryValidator class: org.apache.taglibs.standard.tlv.JstlCoreTLV
        at org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:40)

solution: create a folder springMVC-petclinic-hibernate\web\WEB-INF\lib, then put jstl.jar and standard.jar inside it.
reason: even though the jstl.jar is already in classpath, it’s ignored by the servlet container; have to put the jar along with jsp pages manually.

hibernate-validator-3.1.0.GA not compatible with Core_hibernate-distribution-3.3.1.GA

Use hibernate-validator-3.1.0.GA with Core_hibernate-distribution-3.3.1.GA,
got this error:
java.lang.NoSuchMethodError: org.hibernate.event.PreUpdateEvent.getSource()Lorg/hibernate/engine/SessionImplementor;
at org.hibernate.validator.event.ValidateEventListener.onPreUpdate(ValidateEventListener.java:177)
at org.hibernate.action.EntityUpdateAction.preUpdate(EntityUpdateAction.java:237)

solution: download hibernate-distribution-3.3.0.SP1, use the old hibernate3.jar to replace the new one in distribution-3.3.1.GA.

http://opensource.atlassian.com/projects/hibernate/browse/HV-66

java.lang.NoSuchFieldError: name org.slf4j.impl.Log4jLoggerAdapter.(Log4jLoggerAdapter.java

problem: AnnotationConfiguration cfg = new AnnotationConfiguration(); fails
and javax.servlet.ServletException: Servlet.init() for servlet PersistentController threw exception
java.lang.NoSuchFieldError: name
    org.slf4j.impl.Log4jLoggerAdapter.<init>(Log4jLoggerAdapter.java:75)
   
solution: download a new http://www.slf4j.org/dist/slf4j-1.5.2.tar.gz
(having multiple javassist.jar doesn’t matter)
http://groups.google.com/group/comp.lang.java.programmer/browse_thread/thread/c6d647699b02fb5e/becc5c738902506b?tvc=2#becc5c738902506b

servlet problem: hibernate-validator (requestValidator.getInvalidValues(data) fails)

This section of code fails (data is the bean object):

InvalidValue[] validationMessages;
ClassValidator requestValidator = new ClassValidator(data.getClass());
validationMessages = requestValidator.getInvalidValues(data); //fails here!

Don’t know why but this works (“hobby” is one of the fields of the data bean):
requestValidator.getInvalidValues(data, “hobby”)

So, I modified the whole section to use request’s getParameterMap to traverse each bean property:
    InvalidValue[] validationMessages;
    List<InvalidValue[]> validationMsgList = new ArrayList<InvalidValue[]>();
    ClassValidator requestValidator = new ClassValidator(data.getClass());
    Map pMap = request.getParameterMap();
    Iterator ParIt = pMap.entrySet().iterator();
    while (ParIt.hasNext()) {
            Map.Entry pairs = (Map.Entry) ParIt.next();
            String key = “” + pairs.getKey();
            validationMessages = requestValidator.getInvalidValues(data, key);
            validationMsgList.add(validationMessages);
    }

App finally runs.

DWR(direct-web-remoting) starts here……

dwr, java, jsp, spring

1. Download the dwr.jar (also need commons-logging)
2. Add “<servlet>” and “<servlet-mapping>” into web.xml
3. Create a dwr.xml file. This file defines what classes DWR can create and remote for use by Javascript.
4. Testing url: http://localhost:8080/[YOUR-WEBAPP]/dwr/
-----------------------------------------------------------
OK. Environment is setup. Do a simple example:
1. Inside my “hello.jsp” file’s header, insert
<script type=”text/javascript” src=”javascript/validator.js”></script>
<script type=”text/javascript” src=”/springapp/dwr/interface/DemoPercIncre.js”> </script>
<script type=”text/javascript” src=”/springapp/dwr/interface/PercentageIncre.js”> </script>
<script type=”text/javascript” src=’/springapp/dwr/engine.js’></script>
<script type=”text/javascript” src=’/springapp/dwr/util.js’></script>
<SCRIPT LANGUAGE=”JavaScript”>
function update() {
      var percent = dwr.util.getValue(“percToIncre”);
      PercentageIncre.increPrice(percent, function(data) {
        dwr.util.setValue(“IncreProcessed”, data);
      });
    }
</SCRIPT>
2. Inside “Body”, create input box:
<p>Increase Price by Percent:
<input type=”text” id=”percToIncre” onChange=”digitvalidation(this, 1, 2,’You MUST enter 1 or 2 Integer Digits’,'Integer’);” />
<input value=”Excute” type=”button” onclick=”update()” />
<br />Response: <span id=”IncreProcessed“></span>
</p>
3. Create dwr.xml under WEB-INF, to link the javascript and the java-class.
<dwr>
    <allow>
        <create creator=”new” javascript=”PercentageIncre“>
            <param name=”class” value=”springapp.web.PercentageIncre” />
        </create>
    </allow>
</dwr>
4. Then create the java-class: PercentageIncre.java
package springapp.web;
public class PercentageIncre {
    public String increPrice(String perc) {
        return “Hello, I pretend to increase the price by ” + perc + “% percent.”;
    }
}

note: WEB-INF seems to be a special folder, my hello.jsp can’t find any js files fall into that folder by using “src=…”. I have to create a “javascript” folder parallel with WEB-INF, put js files in it, and in hello.jsp use “<script type=”text/javascript” src=”javascript/validator.js”></script>” to include that validator.js file.

 


Can not find test class ‘*****.java’ in project ‘

I am following the Spring Framework tutorial here: http://static.springframework.org/docs/Spring-MVC-step-by-step/
While doing “1.9. Write a test for the Controller“, I ran into this error: Can not find test class ‘*****.java’ in project ‘
And, it seemed that a jar is missing: import javax.servlet.*** not successful
I suspect servlet-api.jar is missing.

My appserver.lib is ${appserver.home}/server/lib (defined in build.properties),
and in build.xml, it says:         <fileset dir=”${appserver.lib}”>             <include name=”servlet*.jar” />         </fileset>
while in appserver.lib, there is no file called: servlet-api.jar
I copied THE file from ${appserver.home}\common\lib to ${appserver.home}/server/lib,
problem solved.

A more elegant way (instead of putting the same file in two folders) of resolving this issue should exist.
Anyone gives me a hint?

Bedework setup, deploy notes & log

Running the quickStart:
1. open cmd and go: cd C:\java_3rd_party\bedework\quickstart-3.4.1.1
2. ant.bat
3. open database: ant hsqldb    (use gui tool: cd C:\java_3rd_party\bedework\quickstart-3.4.1.1\hsqldb-1.7.3.3\lib    java -cp hsqldb.jar org.hsqldb.util.DatabaseManager    Type: HSQL Database Engine Server    jdbc:hsqldb:hsql://localhost:8887 (from democal.properties)    sa    “”    try SELECT * FROM bw_calendars)
4. open a new cmd window, go: cd C:\java_3rd_party\bedework\quickstart-3.4.1.1 and do: ant tomcatstart; wait to see ([java] INFO: Server startup in 22455 ms)
5. open http://localhost:8080/bedework/

Own Deployment:
1. (optional) setting bedework.build.properties under folder: C:\Documents and Settings\xxzhao; if not setting, system will use: democal.properties and democal.options.xml under folder: C:\netbeansWork\my_quickstart-3.4.1.1\bedework\config\configs
2. democal.properties: for deployment use. To decide: which app to install? etc…
3. democal.options.xml: for use in runtime. e.g.    <name>bedework</name>    <tzid>America/New_York</tzid>    <systemid>demobedework@cal.mysite.edu</systemid>
4. stylesheets and associated template images and resources: ?app.<name>.root?, ?app.<name>.cal.suite?    in the config file (e.g. C:\netbeansWork\my_quickstart-3.4.1.1\bedework\config\configs\myconfig.properties).
5. modify “personal web client” app(webapps): org.bedework.app.UserCal.tomcat.context.xml=war/META-INF/usercontext.xml;    C:\netbeansWork\my_quickstart-3.4.1.1\bedework\projects\webapps\webclient\war\META-INF    C:\netbeansWork\my_quickstart-3.4.1.1\bedework\build: for hibernate dialect
6. create a schema: The deploy process created a zip file in the C:\netbeansWork\my_quickstart-3.4.1.1\bedework\dist directory, which can be unwrapped to run the schema build.    Run bwrun schema: produces a file ?schema.sql?.    Then do: bwrun schema-export: to create all the tables and constraints
7. initialize the database: bwrun initdb -ndebug -indexroot path-for-lucene
8. To dump the database data use    bwrun dump <filename>                To restore the data use: bwrun restore <filename> -ndebug -indexroot path-for-lucene
9. __newThread__: use this res file: C:\netbeansWork\my_quickstart-3.4.1.1\bedework\dist\dumpres.zip        extract it to: C:\netbeansWork\my_quickstart-3.4.1.1\xxz\dumpres
10. stop hsqldb, rename hsqldb-1.7.3.3/demo folder.
11. Restart HSQL, and Hypersonic will create a new, empty demo database: cd C:\netbeansWork\my_quickstart-3.4.1.1\    ant.bat    ant hsqldb    (use gui tool: cd C:\netbeansWork\my_quickstart-3.4.1.1\hsqldb-1.7.3.3\lib    java -cp hsqldb.jar org.hsqldb.util.DatabaseManager    Type: HSQL Database Engine Server    url: jdbc:hsqldb:hsql://localhost:8887 (from democal.properties)    sa    “”    try SELECT * FROM bw_calendars)        as you see, the database is empty, and a new “hsqldb-1.7.3.3/demo” folder is created.
12. to insert data, under dumpres folder: bwrun.bat schema-export        so the structure is established, yet no data.
13. Finally, initialize the database with dumpres/data/initbedework.xml: bwrun.bat initdb    this takes some time…… Elapsed time: 0:19    (full version: bwrun.bat initdb -ndebug -indexroot path-for-lucene)
14. build: in cd C:\netbeansWork\my_quickstart-3.4.1.1: ant clean.deploy.debug    (takes some time: Total time: 2 minutes 53 seconds)    (or doing it without debug: ant clean.deploy)    This will create a number of WAR files in <bedwork>/dist/ including for example: cal.war, caladmin.war, and ucal.war                in C:\netbeansWork\my_quickstart-3.4.1.1 do: ant tomcatstart (INFO: Server startup in 35950 ms)    now it’s deployed: goto: http://localhost:8080/bedework
15. continue from here: 30 of 49 of the manual

solution: The value for the useBean class xxxx.Xxxxx is invalid.

I am trying to output something from a “jsp:getProperty” by using following code inside a JSP page:

        <jsp:useBean id=”sche” class=”bean.scheduleBean” scope=”request” >
            <jsp:setProperty name=”sche” property=”testing” value=”y”/>
            <jsp:getProperty name=”sche” property=”testing”/>
        </jsp:useBean>

And I got following error message:
org.apache.jasper.JasperException: /Catalog/itemsview.jsp(2,0) The value for the useBean class attribute bean.scheduleBean is invalid.
org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:39)
org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:357)
……

Reason: when doing “<jsp:useBean id=”sche” class=”bean.scheduleBean” scope=”request” >”, Java needs the bean class having a no-argument constructor, which my scheduleBean didn’t have. So I added following code to the bean class, and solved problem:

    public scheduleBean() {
    }

JSP – Servlet day 4

Servlet (java class) can also generate HTML pages. 
First write the servlet class.
Then, map the servlet class:

Then in index file, put:

<jsp:forward page=”/ServletTemplate”/>

 

JSP day 3, writing code

1. The character sequences <%= and %> enclose Java expressions, which are evaluated at run time.
Write this in jsp file: <%= new java.util.Date() %>
You’ll get current time.
Only good for simple java code.

2. You do Scriptlets by placing your larger Java code between <% and %> characters (just like expressions, but without the = sign at the start of the sequence.)

<HTML><BODY><%    // This is a scriptlet.  Notice that the "date"    // variable we declare here is available in the    // embedded expression later on.    System.out.println( "Evaluating date now" );    java.util.Date date = new java.util.Date();%>Hello!  The time is now <%= date %></BODY></HTML>

Notice the output from the "System.out.println" will be on the server log.

3. Using “out” variable in Scriptlet, to generate HTML.

<HTML><BODY><%    // This scriptlet declares and initializes "date"    System.out.println( "Evaluating date now" );    java.util.Date date = new java.util.Date();%>Hello!  The time is now<%    // This scriptlet generates HTML output    out.println( String.valueOf( date ));%></BODY></HTML>

The "out" variable is of type javax.servlet.jsp.JspWriter.

4. Using “request” variable of type javax.servlet.http.HttpServletRequest

<HTML><BODY><%    // This scriptlet declares and initializes "date"    System.out.println( "Evaluating date now" );    java.util.Date date = new java.util.Date();%>Hello!  The time is now<%    out.println( date );    out.println( "<BR>Your machine's address is " );    out.println( request.getRemoteHost());%></BODY></HTML>

Note: request variable is sent by client, processed by server, and return the result of the method to client.

5. Generate a dynamic table, by mixing HTML, Scriptlet and Java-Expression

<HTML><BODY>        <% int n = 120; %>        <TABLE BORDER=1>            <%            for ( int i = 0; i < n; i++ ) {            %>            <TR>                <TD>Number</TD>                <TD><%= i+1 %></TD>            </TR>            <%            }            %>        </TABLE></BODY></HTML>

Note: declare a variable n =120, the <TR> … </TR> will run 120 times. With two columns.

Just another example:
       
        <% boolean hello = false; %>
        <%
        if ( hello ) {
        %>
        <P>Hello, world
        <%
        } else {
        %>
        <P>Goodbye, world
        <%
        }
        %>

To get system’s properties:
<%=System.getProperties().toString() %>

6. import (a directive)

<%@ page import="java.util.*" %><HTML><BODY><%    System.out.println( "Evaluating date now" );    Date date = new Date();%>Hello!  The time is now <%= date %></BODY></HTML>

Note: The first line in the above example is called a “directive“.  A JSP “directive” starts with <%@ characters.
This one is a “page directive“.
To import more than one item:

<%@ page import="java.util.*,java.text.*" %>

7. include directive

<HTML><BODY>Going to include hello.jsp...<BR><%@ include file="hello.jsp" %></BODY></HTML>

8. Tag (jsp tags and non-jsp tags)

jsp:include
usage

<HTML><BODY>Going to include hello.jsp...<BR><jsp:include page="hello.jsp"/></BODY></HTML>

Note: another way of doing include. Tags have XML style.

do forward:
<jsp:forward page=”zxx.html”/>

8. use session
in first page, use a “Form” and a “Text Input” to accept user’s input
        <FORM METHOD=POST ACTION=”SaveName.jsp”>
            What’s your name? <INPUT TYPE=TEXT NAME=username SIZE=20>
            <P><INPUT TYPE=SUBMIT>
        </FORM>
in second page, save the “name” to a variable.
<%
   String name = request.getParameter( “username” );
   session.setAttribute( “theName”, name );
%>
<html>
    <head>
        <meta http-equiv=”Content-Type” content=”text/html; charset=UTF-8″>
        <title>JSP Page</title>
    </head>
    <body>
    <h1>JSP Page</h1>
    <A HREF=”NextPage.jsp”>Continue</A>
    </body>
</html>
then in the third page, user can still retrieve the value
<%= session.getAttribute( “theName” ) %>

9. use bean to correspond HTML form.
i. design a HTML form

<HTML><BODY><FORM METHOD=POST ACTION="SaveName.jsp">What's your name? <INPUT TYPE=TEXT NAME=username SIZE=20><BR>What's your e-mail address? <INPUT TYPE=TEXT NAME=email SIZE=20><BR>What's your age? <INPUT TYPE=TEXT NAME=age SIZE=4><P><INPUT TYPE=SUBMIT></FORM></BODY></HTML>

ii. define a Java class with fields "username", "email" and "age"class: UserData		package: me

iii. use this class in the file "SaveName.jsp"<jsp:useBean id="user" class="me.UserData" scope="session"/><jsp:setProperty name="user" property="*"/> 

These two lines of code will handle all the properties.
It will save the user’s data in the bean instance.

iv. in “NextPage.jsp“, retrieve the properties
<jsp:useBean id=”user” class=”me.UserData” scope=”session”/>
in <body>, use <%= user.getUsername() %>

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