用dwr.jar实现Ajax

Posted on 2007-12-10 18:38 wawa 阅读(1455) 评论(0)  编辑  收藏

1--下载dwr.jar 放在web-info/lib目录下.并引入到工程中
2--在web.xml目录下建dwr.xml 内容如下:
    <?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE dwr PUBLIC "-//GetAhead Limited//DTD Direct Web Remoting 1.0//EN" "http://www.getahead.ltd.uk/dwr/dwr10.dtd">
<dwr>
<allow>
<create creator="new" javascript="DwrSearchMethod">
<param name="class" value="com.webstone.drp.common.dwrAjax.DwrSearchMethod"/>
</create>
</allow>
</dwr>

"<create creator="new" javascript="DwrSearchMethod"> "是你在jsp中调用的别名
"<param name="class" value="com.webstone.drp.common.dwrAjax.DwrSearchMethod"/>
"是在jsp中调用后台的方法.
你可以自己加很多类
3--在web.xml内加

<servlet>
  <servlet-name>dwr-invoker</servlet-name>
  <display-name>DWR Servlet</display-name>
  <servlet-class>uk.ltd.getahead.dwr.DWRServlet</servlet-class>
  <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>


ok,现在配置好了
在浏览器中输入 http://localhost:8080/项目名称/dwr   会出现配置文件 那么配置正确

下来看在jsp中怎么调用后台
在用到dwr的jsp中加入以下代码
   <script src='/项目路径/dwr/interface/DwrSearchMethod.js'></script>
   <script src=''/项目路径/dwr/engine.js'></script>

以下要用jacascript调用后台方法名是写 DwrSearchMethod.方法(参数,回调方法).

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