Notes by Fang
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Created by Fang on March 05, 2012 20:11:56
Last update: March 05, 2012 20:11:56
This is a bare bones Maven project to get started with Java JSR 303 bean validation.
Directory structure:
./pom.xml
./src
./src/main
./src/main/jav...
pom.xml :
<project xmlns="http://maven.apache.org/POM/4.0.0"...
which includes dependencies on JUnit, Java bean validation API and the Hibernate validator reference implementation.
Created by Fang on February 23, 2012 14:25:57
Last update: March 01, 2012 13:53:59
Some example snippets for Spring message configuration and usage.
To configure a message source in Spring context (basename=messages):
<bean id="messageSource"
class="org.springf...
Locale change interceptor can also be setup with:
<?xml version="1.0" encoding="UTF-8"?>
<beans x...
The messages file should be named messages.properties (or messages_en.properties , etc.) and located on CLASSPATH , for example: WEB-INF/classes .
To use a message resource in JSP:
<%@ taglib prefix="spring" uri="http://www.springf...
Created by Fang on February 15, 2012 21:26:46
Last update: February 15, 2012 21:26:46
Add configuration variables for the surefire plugin to use system properties in Maven test:
<build>
<plugins>
<plugin>
<group...
Created by Fang on January 31, 2012 15:40:34
Last update: January 31, 2012 15:41:28
This is a simple Hello World application with Spring 3 MVC. Like the default Apache HTTPd welcome page, it displays " It works! " when successfully deployed. The sole purpose is to show the minimum elements needed to setup Spring 3 MVC.
I use Maven since it's so much easier than downloading the dependencies manually.
Directory layout:
./src
./src/main
./src/main/webapp
./src/...
pom.xml :
<?xml version="1.0" encoding="UTF-8"?>
<project...
WEB-INF/web.xml :
<?xml version="1.0" encoding="UTF-8"?>
<web-app...
WEB-INF/applicationContext.xml (empty, but needed):
<?xml version="1.0" encoding="UTF-8"?>
<beans x...
WEB-INF/spring-servlet.xml :
<?xml version="1.0" encoding="UTF-8"?>
<beans x...
WEB-INF/jsp/home.jsp :
<!DOCTYPE html>
<html>
<head>
<title>H...
Build with:
mvn clean package
The resulting webapp is target/springmvc.war .
Created by Fang on January 04, 2012 11:14:46
Last update: January 04, 2012 11:14:46
Assume that your messages are defined in MessageResources.properties , this is how you load and use the messages:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Stric...
In MessageResources.properties :
pageTitle = JSF Resource Bundle Example
page.he...
Created by Fang on January 04, 2012 09:54:05
Last update: January 04, 2012 09:54:05
There are two ways to validate a form with JSF: jsf validation on the page with <f:validate...> tags (for example: <f:validateLength> , <f:validateRegex> , etc.), or JSR303 bean validation. This note is about how to customize messages for JSR303 bean validation. The validation message is specified in the message attribute for each validation annotation type. The mesage attribute is not a literal string, but a string that is interpolated in various ways. For example, the default validation message for AssertFalse is {javax.validation.constraints.AssertFalse.message} , which is replaced with the corresponding string in ValidationMessages.properties (or ValidationMessages_tr.properties , ValidationMessages_es.properties , depending on the locale). This is the contents of ValidationMessages.properties in the hibernate validator reference implementation:
javax.validation.constraints.AssertFalse.message =... To customize the messages, just provide the new value in...
Created by Fang on December 09, 2011 11:50:28
Last update: December 09, 2011 11:51:34
Values of Maven properties are accessed with the construct ${...} . Properties come from 5 different sources:
From the environment, for example: ${env.PATH} , ${env.JAVA_HOME} .
From the POM, in the form of ${project.x} . For example: ${project.version} , ${project.groupId} .
From settings.xml , in the form of ${settings.x} . For example: ${settings.offline} , ${settings.interactiveMode} .
From Java system properties, for example: ${java.home} .
Defined within the properties element in the POM. For example ( gae.version ):
<properties>
<gae.version>1.4.2</gae.ve...
Created by Fang on December 06, 2011 19:52:15
Last update: December 06, 2011 19:52:15
Resource files under the src/main/resources directory are copied verbatim to the target/classes directory during build. But resources can be filtered by turning on filtering in pom.xml :
<build> <resources> <resource> ... When filtering is turned on, constructs like ${...} are replaced with actual values if they are defined. For example, create a file test.properties : project.stage=${project.stage} The build command " mvn package " simply copies test.properties to target/classes/ . But if you build with: mvn -Dproject.stage=dev package the contents of target/classes/test.properties becomes: project.stage=dev Sometimes you want different resource definitions for different environments, e.g., dev vs. prod. You can achieve that by defining profiles in pom.xml : <profiles> <profile> <id>dev</id> ... In the above, dev is the default profile, prod is defined but not active unless...
Created by Fang on December 05, 2011 14:56:47
Last update: December 05, 2011 14:57:09
This works for Tomcat. It may or may not work for other servlet containers. As far as I know it's not in the standards spec.
In web.xml:
<context-param>
<param-name>env</param-name>
...
If you start Tomcat without defining env , then #{initParam['env']} is ${env} . If you start Tomcat with -Denv=dev in JAVA_OPTS , then #{initParam['env']} is dev
Created by Fang on December 01, 2011 18:54:54
Last update: December 01, 2011 18:54:54
Use the varStatus attribute with the ui:repeat tag to get the iteration index:
<ui:repeat varStatus="status" var="item" value="#{...
The varStatus attribute specifies the name of the exported request scoped variable for the status of the iteration.The object is a POJO with the following read-only JavaBeans properties. This scoped variable has nested visibility.
begin of type Integer
end of type Integer
index of type int
step of type Integer
even of type boolean
odd of type boolean
first of type boolean
last of type boolean
