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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 Dr. Xi on February 13, 2012 20:59:35
Last update: February 13, 2012 20:59:54
The insertAttribute tag allows you to have a body as well as specify a default value, but both values are scriptless , i.e., scriptlet is not allowed in body:
<tiles:insertAttribute name="javascript">
<scri...
and defaultValue is output literally:
<tiles:insertAttribute name="javascript"
de...
And, <put-attribute> in tiles definition does not replace the body of <tiles:insertAttribute> , it appends to the body!
Created by Dr. Xi on February 13, 2012 20:48:56
Last update: February 13, 2012 20:48:56
When you insert an attribute in JSP:
<%@ taglib uri="http://tiles.apache.org/tags-tiles...
you must define the attribute in tiles definitions:
<definition name="/home" template="/WEB-INF/templa...
Otherwise you'll get runtime exception.
The ignore attribute, which defaults to false , will suppress the runtime exception when the attribute is not defined in tiles definition:
<%@ taglib uri="http://tiles.apache.org/tags-tiles...
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 28, 2012 13:24:09
Last update: January 28, 2012 13:31:22
This is a simple JSP custom tags library with tag body. Just like the JSF counterpart , it splits a string and repeats the body for each word, i.e., with this markup:
<%@ taglib uri="http://custom.tag.com/demo" prefix...
output:
<html>
<body>
<p>Hello Tigger!</p>
<p>H...
With Maven, this is the directory structure:
./src
./src/main
./src/main/resources
./s...
There are three files to write:
pom.xml :
<project xmlns="http://maven.apache.org/POM/4.0.0"...
src/main/java/tagdemo/IterateTag.java :
package tagdemo;
import java.io.IOException...
src/main/resources/META-INF/demotag.tld :
<?xml version="1.0" encoding="UTF-8"?>
<!DO...
Build with:
mvn clean install
To use it as a dependency in other Maven projects:
<dependency>
<groupId>tag-demo</groupId>
...
Created by Fang on January 16, 2012 13:03:28
Last update: January 16, 2012 14:58:13
Apache commons validator provides a class to validate emails.
Code:
import org.apache.commons.validator.EmailValidator...
Maven dependency:
<dependency>
<groupId>commons-validator</gr...
Created by Dr. Xi on January 04, 2012 16:28:27
Last update: January 04, 2012 16:28:27
Steps to enable SSI (Server Side Include) in Apache HTTPD:
Enable mod_include .
In httpd.conf , update directive:
AllowOverride Options FileInfo
In .htaccess :
Options +Includes
AddType text/html .shtml
A...
Files with extension .shtml will be processed with SSI.
You may want to enable mod_cgi to include output from CGI programs:
<!--#include virtual="/cgi-bin/counter.pl" -->
To control caching :
Use the XBitHack Full configuration. This tells Apache to determine the last modified date by looking only at the date of the originally requested file, ignoring the modification date of any included files.
Use the directives provided by mod_expires to set an explicit expiration time on your files, thereby letting browsers and proxies know that it is acceptable to cache them.
Created by Fang on January 04, 2012 08:56:13
Last update: January 04, 2012 09:01:08
You need both the bean validation API and implementation for JSR303 bean validations to work with Tomcat. Add both as dependencies in Maven pom.xml ( hibernate-validator is the reference impl):
<dependencies>
<dependency>
<groupId>o...
Created by nogeek on December 30, 2011 13:25:28
Last update: December 30, 2011 13:57:37
By default, tomcat uses an enhanced java.util.logging implementation called JULI, which can be configured at two different levels: Globally, with the ${catalina.base}/conf/logging.properties file. Per web application, with WEB-INF/classes/logging.properties . The configuration file is a normal Java properties file: Logging handlers are specified with the handlers property.
handlers = 1catalina.org.apache.juli.FileHandler, ... The root logger can define its set of handlers using the .handlers property. .handlers = 1catalina.org.apache.juli.FileHandler,... A prefix may be added to handler names. The prefix starts with a digit and ends with a dot ( . ), for example: # 1catalina. is a prefix 1catalina.org.apache.j... System property replacement is performed for property values which contain ${systemPropertyName} . Each handler can have its own specific properties: 3manager.org.apache.juli.FileHandler.level = FINE ... Loggers can define their own...
Created by nogeek on December 30, 2011 13:54:04
Last update: December 30, 2011 13:54:04
Tomcat 7.0 failed with a SEVERE error without printing a stack trace:
Dec 30, 2011 1:21:09 PM org.apache.catalina.core.S...
Now it's hard to figure out what's wrong without knowing where things went wrong. Why is Tomcat not logging anything?
Tomcat logging is configured by class loader. Logging behaves differently depending on which class loader loaded the logger. You'll need to look at both $CATALINA_BASE/conf/logging.properties and WEB-INF/classes/logging.properties to figure out why the stack trace is not logged.
In my case, the web app specific WEB-INF/classes/logging.properties overshadowed the system $CATALINA_BASE/conf/logging.properties and suppressed the stack trace.
