Config DWR
DWR is a Java library that enables Java on the server and JavaScript in a browser to interact and call each other as simply as possible. This post help you config DWR easily with example
Add DWR library dependency
<dependency> <groupId>org.directwebremoting</groupId> <artifactId>dwr</artifactId> <version>3.0.0-RELEASE</version> </dependency>
DWR Definition - Add the DWR servlet definition and mapping to your application's web.xml
Add the following lines to your web application's deployment descriptor (
WEB-INF/web.xml). The <servlet> section needs to go with any existing <servlet> sections, and likewise with the <servlet-mapping> section.<servlet> <servlet-name>dwr-invoker</servlet-name> <servlet-class>org.directwebremoting.servlet.DwrServlet</servlet-class> <init-param> <param-name>fileUploadMaxBytes</param-name> <param-value>25000</param-value> </init-param> <init-param> <param-name>activeReverseAjaxEnabled</param-name> <param-value>false</param-value> </init-param> <init-param> <param-name>allowScriptTagRemoting</param-name> <param-value>true</param-value> </init-param> <init-param> <param-name>debug</param-name> <param-value>true</param-value> </init-param> </servlet> <servlet-mapping> <servlet-name>dwr-invoker</servlet-name> <url-pattern>/dwr/*</url-pattern> </servlet-mapping>Config DWR - Create the DWR configuration file (dwr.xml)
Create a new file in you web application's
WEB-INFdirectory (alongside web.xml) named dwr.xml.<!DOCTYPE dwr PUBLIC "-//GetAhead Limited//DTD Direct Web Remoting 3.0//EN" "http://getahead.org/dwr/dwr30.dtd"> <dwr> <allow> <create creator="new" javascript="JDate"> <param name="class" value="java.util.Date"/> </create> <create creator="new" javascript="Demo"> <param name="class" value="your.java.Bean"/> </create> <create creator="new"> <param name="class" value="your.java.YourClass"/> </create> <create creator="new" scope="application"> <param name="class" value="your.java.YourClassHasScopeApplication"/> </create> <create creator="new" scope="application"> <param name="class" value="your.java.YourClassUsingBean"/> </create> <convert converter="bean" match="your.java.YourClassUsingBean"/> </allow> </dwr>How to make use of this from your web application
Paste the text into <head> tag an HTML or JSP page in your web-app
<script src='/[YOUR-WEBAPP-CONTEXT]/dwr/engine.js'></script> <script src='/[YOUR-WEBAPP-CONTEXT]/dwr/interface/[YOUR-SCRIPT].js'></script>
Paste the text into <script> tag an HTML or JSP page in your web-app
Remote.getData(parameter, handle); function handle(data) { console.log(data); }
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