Tipikal STS 3.3.0 Config

-startup
plugins/org.eclipse.equinox.launcher_1.3.0.v20130327-1440.jar
--launcher.library
plugins/org.eclipse.equinox.launcher.win32.win32.x86_64_1.1.200.v20130521-0416
-product
org.springsource.sts.ide
--launcher.defaultAction
openFile
--launcher.XXMaxPermSize
256M
-vmargs eclipse -vm c:\jdk6u22\jre\bin\javaw
-Duser.name=developer name
-Dosgi.requiredJavaVersion=1.6
-Xmn512m
-Xms1024m
-Xmx2048m
-XX:PermSize=1024m
-XX:MaxPermSize=2048m

org.xml.sax.helpers.SecuritySupport12 cannot access its superclass org.xml.sax.helpers.SecuritySupport

Error:

java.lang.IllegalAccessError: class org.xml.sax.helpers.SecuritySupport12 cannot access its superclass org.xml.sax.helpers.SecuritySupport

berlaku ketika cuba run kod di atas Tomcat 7 dengan JDK 1.7

Penyelesaian:

masukkan property metadata-complete="true" dalam web.xml

Contoh:

<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" 

xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" 

xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0" metadata-complete="true">

Rujukan:

• http://frazedjava.blogspot.com/2011/05/tomact-7-errors.html

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.