1.使用DWR是非常方便的,先到其官方网站(www.directwebremoting.org)下载dwr.jar,目前最新版本是3.rc1
2.把下载的dwr.jar放到工程的WEB-INF\lib下.
3.在WEB-INF目录下的web.xml文件中增加DWR的servlet配置,如:
<servlet>
<servlet-name>dwr-invoker</servlet-name>
<servlet-class>org.directwebremoting.servlet.DwrServlet</servlet-class>
<init-param>
<param-name>debug</param-name>
<param-value>true</param-value> <!-- 在发布阶段将其设为false -->
</init-param>
</servlet>
<servlet-mapping>
<servlet-name>dwr-invoker</servlet-name>
<url-pattern>/dwr/*</url-pattern>
</servlet-mapping>
4.在WEB-INF目录下创建dwr.xml文件,如:
<!DOCTYPE dwr PUBLIC "-//GetAhead Limited//DTD Direct Web Remoting 3.0//EN" "http://getahead.org/dwr//dwr30.dtd">
<dwr>
<allow>
<create creator="new" javascript="Test">
<param name="class" value="mypack.Test" />
</create>
</allow>
</dwr>
5.在要使用DWR的jsp页面中导入DWR的2个核心JS文件和自己在dwr.xml文件中配置的Test.js文件
<script type='text/javascript' src='<%=request.getContextPath()%>/dwr/engine.js'></script>
<script type='text/javascript' src='<%=request.getContextPath()%>/dwr/util.js'></script>
<script type='text/javascript' src='<%=request.getContextPath()%>/dwr/interface/Test.js'></script>
6.现在可以在JS中使用DWR了,如:
Test.sayHello(); // 后台的Test.java中的sayHello()方法会被调用
