#{茶男與藍牌} » Java

Enterprise Java Community: Redirect After Post

茶男 — Mon, 25 Jan 2010 04:04:03 +0000

from http://www.theserverside.com/tt/articles/article.tss?l=RedirectAfterPost

All interactive programs provide two basic functions: obtaining user input and displaying the results. Web applications implement this behavior using two HTTP methods: POST and GET respectively. This simple protocol gets broken when application returns web page in response to POST request. Peculiarities of POST method combined with idiosyncrasies of different browsers [...]

Spring Framework Annotation-based Controller Interceptor Configuration

茶男 — Wed, 13 Jan 2010 04:53:51 +0000

from http://www.scottmurphy.info/spring_framework_annotation_based_controller_interceptors

In order to use interceptors with Annotation-based controllers, you need to configure the DefaultAnnotationHandlerMapping used by the Spring container.

<bean id="annotationMapper" class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping"> <property name="interceptors"> <list> <ref bean="myInterceptor1"/> <ref bean="myInterceptor2"/> <ref bean="myInterceptor3"/> </list> </property> </bean> URL Specific Interceptors for Annotation-based controllers

Unfortunately, using the DefaultAnnotationHandlerMapping for interceptors configures the interceptors for all defined [...]

How to Reference and Use JSTL in your Web Application

茶男 — Tue, 12 Jan 2010 02:29:37 +0000

from http://www.mularien.com/blog/2008/04/24/how-to-reference-and-use-jstl-in-your-web-application/

As a frequent contributor to the Spring Framework user forums, I have noticed a common trend among people new to Spring MVC – they really don’t understand how to use JSTL and EL in their Spring-driven JSPs.

Although Spring MVC supports flexibility in choosing a view technology, in my [back of [...]

Servlet 2.3: New features exposed

茶男 — Sun, 30 Aug 2009 23:59:54 +0000

Portlet Session in Portlet 1.0

茶男 — Wed, 17 Jun 2009 09:15:06 +0000

It could not just simply remove the session attribute by using invocation removeAttribute.

You have to remove it by setting it to null.

!Statement.GeneratedKeysNotRequested!

茶男 — Wed, 10 Jun 2009 05:48:00 +0000

Happen on version 5.1.7, so switch back to 5.1.6 is the solution…

From http://bugs.mysql.com/bug.php?id=41448

Bug #41448 java.sql.SQLException: !Statement.GeneratedKeysNotRequested! Submitted: 13 Dec 2008 18:22 Modified: 28 May 20:29 Reporter: Rico H. Status: Documenting Category: Connector/J Severity: S1 (Critical) Version: 5.1.7 OS: Linux Assigned to: Target Version: [13 Dec 2008 18:22] Rico H. Description: Hello, Consider [...]

Code example: Java enum

茶男 — Wed, 08 Apr 2009 07:25:02 +0000

For no properties:

public enum Day { SUNDAY, MONDAY, TUESDAY, WEDNESDAY, THURSDAY, FRIDAY, SATURDAY }

For properties:

public enum Planet { MERCURY (3.303e+23, 2.4397e6), VENUS (4.869e+24, 6.0518e6), EARTH (5.976e+24, 6.37814e6), MARS (6.421e+23, 3.3972e6), JUPITER (1.9e+27, 7.1492e7), SATURN (5.688e+26, 6.0268e7), URANUS (8.686e+25, 2.5559e7), NEPTUNE (1.024e+26, 2.4746e7); private final double mass; // in kilograms private final double [...]

SQLException for zero DATETIME or TIMESTAMP column? Use zeroDateTimeBehavior

茶男 — Fri, 03 Apr 2009 04:05:42 +0000

from http://ondra.zizka.cz/stranky/programovani/java/index.texy

When working with MySQL over JDBC and the driver encounters a zero DATE, TIME, or DATETIME value (that is, e.g, ‚0000–00–00‘ for DATE), an exception is thrown:

java.sql.SQLException: Cannot convert value '0000-00-00 00:00:00' from column 4 to TIMESTAMP.

In this case, using SQL commands like

SET GLOBAL sql_mode = 'NO_ZERO_DATE';

does not [...]

Error page definition in web.xml and Spring

茶男 — Tue, 31 Mar 2009 06:34:52 +0000

#
# for servlet
#
You can find the error page from web.xml as following:

<error-page>
<exception-type>java.lang.Throwable</exception-type>
<location>/WEB-INF/view/error/uncaughtException.jsp</location>
</error-page>

#
# for spring
#
You can find the error page handler in applicationContext.xml

<bean id="defaultExceptionHandlerTemplate" class="org.springframework.web.servlet.handler.SimpleMappingExceptionResolver" abstract="true">
[...]

Tomcat keytool to generate .keystore

茶男 — Tue, 31 Mar 2009 03:53:18 +0000

To install and configure SSL support on Tomcat 5, you need to follow these simple steps. For more information, read the rest of this HOW-TO.

Create a certificate keystore by executing the following command:Windows: %JAVA_HOME%\bin\keytool -genkey -alias tomcat -keyalg RSA

Unix:

$JAVA_HOME/bin/keytool -genkey -alias tomcat -keyalg RSA

and specify a password value of “changeit”. Uncomment [...]