Unsupported major.minor version 51.0

Masalah ini didapati ketika cuba run sistem Online.

Environment:

• Spring Tool Suite (STS 2.9.2)
• Tomcat 7
• JDK 1.7

Punca:

• Class dikompil menggunakan JDK 1.7 manakala Tomcat 7 ketika itu diset untuk gunakan JDK 1.6

Penyelesaian:

• Set server untuk run gunakan JDK 1.7.

Rename nama deployable guna Maven

Tukar nama projek kod APR kepada 1 nama baru.

Spring Framework 3.05

Langkah2 terlibat:

1. clean project (MAVEN + compiller)
2. modify config pada pom.xml
3. recompile
4. redeploy

Jika melibatkan port forwarding:

1. login as root
2. ke opt/apache/apache2214/conf - modify http config file
3. ke opt/apache/apache2214/bin
4. ./apachectl -k restart

Habis.

Login: SPRING Security 3.0.5 & Stored Procedure

Masalah: login gunakan SPRING Security + Stored Procedure (custom authentication)

Mencabar gak task ni. Sebab dah biasa gunakan config login SPRING Security & LDAP.

Work in progress:

• cuba guna custom beans + custom filter.
• daripada docs suruh guna custom AuthenticationProvider

Kajian & rujukan:

• Beans Go Crazy: Custom Authentication using Spring Security
• http://stackoverflow.com/questions/16104228/how-implement-spring-security-when-login-page-having-more-field-apart-from-user
• melalui jawapan yang diberi, mungkin boleh modify userdetails, cuma ini framework SPRING Security 2.0
• http://www.integratingstuff.com/2011/04/30/migrating-from-spring-security-2-to-spring-security-3/
• Implement custom AuthenticationProvider in Spring Security 2.06
• http://danielkaes.wordpress.com/2013/02/20/custom-authentication-provider-in-spring/, the most relevant info for my problems. What a shame, never found this post before, Google should be blamed for it! ***Working on this solution***
• masalah dgn bean la pulak!!!
• http://www.cleancode.co.nz/blog/937/customization-spring-security-authentication; tak sempat baca lagi.

Webflow: SAXParseException: cvc-complex-type.2.4.a: Invalid content was found starting with element 'set'.

SEVERE: Servlet.service() for servlet apr threw exception
org.xml.sax.SAXParseException: cvc-complex-type.2.4.a: Invalid content was found starting with element 'set'. One of '{"http://www.springframework.org/schema/webflow":attribute}' is expected.
at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.createSAXParseException(ErrorHandlerWrapper.java:195)
at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.error(ErrorHandlerWrapper.java:131)
at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:384)
at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:318)

Dapat agak error ni sebab salah letak attribut, tapi jenuh jugak la nak cari. Hilang setengah hari.
Rupa2nya sebab ini:


<evaluate expression="studyPlanFrmService.saveStudyPlan(flowScope.studyPlanForm)" result="flowScope.studyPlanform">
<set name="flowScope.msj" value="flowScope.studyPlanForm.formMessage" ></set>
</evaluate>

<set></set> tak boleh diletak dalam <evaluate></evaluate> ???
Tak kisahlah, asal jalan kod aku.

org.apache.commons.lang.time.DateUtils

Tugas hari ini adalah untuk set tarikh berdasarkan bilangan bulan daripada tarikh tertentu

Alhamdulillah, dapati bahwa class di bawah ini mempunyai function yang diperlukan. Tiba masa untuk test.

org.apache.commons.lang.time.DateUtils

Displaytag: nested tables in 1 row

Salah satu function nak kena buat ialah display nested array list.
Nanti2 la kaji.

Rujukan:
http://stackoverflow.com/questions/11358422/how-to-show-nested-array-lists-using-display-tag-on-jsp

Spring Security: @ converted to "@ ;" when login failed

Selepas ikut teknik flow ini, tiada masalah dah.

http://stackoverflow.com/questions/15052860/spring-security-authentication-get-username-without-spring-security-last-userna