Ajax 学习手扎(一)Ajax 的环境配置

 

1,下载 dwr.jar包放到Web-Info/lib/下

2,修改web.xml配置

<servlet>

       <servlet-name>dwr-invoker</servlet-name>

       <servlet-class>uk.ltd.getahead.dwr.DWRServlet</servlet-class>

       <init-param>

                 <description>

                 </description>

                 <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>

3.在Web-INFo下新建dwr.xml配置文件

<?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="Hello">

      <param name="class" value="com.tjsoft.test.Hello" />

    </create>

 </allow>

</dwr>

4.在jSP页面中使用如下JS进行结果调用:
<script type='text/javascript' src='dwr/interface/Hello.js'></script>

 <script type='text/javascript' src='dwr/engine.js'></script>

 <script type='text/javascript' src='dwr/util.js'></script>

   <script>

   function hello() {

    var user = $('user').value;

    Hello.hello(user, callback);

}

 

function callback(msg) {

   DWRUtil.setValue('result', msg);

}

   </script>