Struts 2.0.0 is the first distribution of WebWork 2 as an Apache Struts product.
The current snapshot is graded "test build" quality. It is "ready enough" for early development – but there are gaps in the documentation, and early testing will undoubtedly expose other oversights.
For your convenience, a one-stop all distribution is available. Individaul elements of the distribution may also be downloaded separately.
The entire distribution, including all the elements. (36mb) |
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The example applications, as ready-to-deploy WARs. (27mb) |
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Just the blank application, ready to deploy as a template for new development. (Also included in apps.) (4mb) |
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The documentation, as provided on the website (currently only the welcome page Javadocs, not the wiki pages). (6mb) |
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The essential dependencies, including the Struts 2 JARs. (3mb) |
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The source code for the framework, ready to build as a Maven project. (18mb) |
- If you are a Maven developer, you might want to get started using the Maven Archetype.
- Another quick-start entry point is the blank application. Rename and deploy the WAR as a starting point for your own development.
Key Snippets
Maven Artifact ID
<dependency> <groupId>org.apache.struts</groupId> <artifactId>struts2-core</artifactId> <version>2.0.0-SNAPSHOT</version> </dependency>
Struts Configuration DTD
<!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN" "http://struts.apache.org/dtds/struts-2.0.dtd">
Key Changes
Depending on whether you are coming from a WebWork 2 or Struts 1 background, your perspective on the key changes will differ.
From WebWork 2
- Struts 2 is dependant on XWork 2 (nightly build).
- At this time, Java 1.5 is required to build and deploy Struts 2. If possible, RetroWeaver or RetroTranslater may be used to support Java 1.4 in the Struts 2.0.x series.
For other changes from WebWork 2, see the "Members to rename", "New property settings", "New members or feature changes", and "Removed or deprecated".
Members to rename
WebWork 2 |
Struts 2 |
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com.opensymphony.webwork.* |
org.apache.struts2.* |
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DispatcherUtil |
Dispatcher |
New property settings
struts.compatibilityMode.WebWork |
Enable support for the |
This setting will be removed in a future release! |
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New members or feature changes
- Datepicker tag is now using dojo's (limited in terms functionality and internationalization)
- Various changes to ConfigurationManager
- ConfigurationManager is no longer a static factory. It is now an instance created through Dispatcher. Custom configuration could be done through DispatcherListener.
- Configuration is no longer statically accessible, it is created by ConfigurationManager. Custom configuration could be done through ConfigurationManager which in turns could be configured through DispatcherListener.
- Custom configuration to ConfigurationManager and Configuration cannot be done statically anymore, instead use Dispatcher's DispatcherListener to achieve such effect.
- The
prepare
interceptor now uses reflection to call prepareXxx where Xxx is the action method configured for the particular action instruts.xml
<action name="myAction" method="execute" ....> ..... </action> // with the above configuration, and preparator interceptor in place, call // sequence will be 1] prepareExecute() 2] prepare() (could be left out depending on interceptor's alwaysInvokePreapre parameter) 3] execute()
- Default workflow interceptor (named workflow in struts-default.xml) now uses reflection to call validateXXX on the action class that implements Validateable interface where XXX is the action method configured for the particular actionin
struts.xml
.<action name="myAction" method="execute" ...> ... </action> // with the above configuration, and workflow interceptor in place, call // sequence for action that imlpements Validateable interface will be 1] validateExecute() 2] validate() (could be left out depending on interceptor's alwaysInvokeValidate parameter) 3] execute()
Removed or deprecated
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The "action!alias" syntax is deprecated. The idiom is disabled by default, but it can be enabled via the |
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AroundInterceptor |
The AroundInterceptor has been removed. If your application extends the AroundInterceptor, either import the class into your source code form WebWork 2 (pursuant to the Open Symphony License) and modify it to server as your own base class, or rewrite your interceptor. |
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Support for the "oldSyntax" is removed . |
Rich text editor tag |
Rich text editor tag has been removed (a possible replacement would be to use the textarea tag with theme="ajax", this will used dojo's rich text editor) <s:textarea theme="ajax" /> |
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The convention of trying a "do" form of an alias is not supported. |
From Struts 1
- See http://confluence.twdata.org/display/WW/Comparing+Struts+1+and+2
- More notes to come ...