配置dwr

第一步：引用jar包：dwr.jar
第二步：web.xml文件中加入：
  <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>
</init-param>
<init-param>
<param-name>activeReverseAjaxEnabled</param-name>
<param-value>true</param-value>
</init-param>
<init-param>
<param-name>
initApplicationScopeCreatorsAtStartup
</param-name>
<param-value>true</param-value>
</init-param>
<init-param>
<param-name>maxWaitAfterWrite</param-name>
<param-value>100</param-value>
</init-param>
<init-param>
<param-name>crossDomainSessionSecurity</param-name>
    <param-value>false</param-value>
   </init-param>

</servlet>
<servlet-mapping>
<servlet-name>dwr-invoker</servlet-name>
<url-pattern>/dwr/*</url-pattern>
</servlet-mapping>
第三步：与web.xml文件同级目录下存放dwr.xml：
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE dwr PUBLIC "-//GetAhead Limited//DTD Direct Web Remoting 2.0//EN" "http://getahead.org/dwr/dwr20.dtd">

<dwr>

  <allow>
  <create creator="spring" javascript="orgtypeMgr">
      <param name="beanName" value="orgtypeService"/>
       <include method="getOneOrgtypeOfDwr" />
  </create>
 
 
<convert converter="bean" match="com.housetrade.application.model.Orgtype"/>

</allow>
</dwr>
第四步：页面js使用：
    var orgtypeid= document.getElementById("typeid").value;
orgtypeMgr.getOneOrgtypeOfDwr(orgtypeid,function(orgt){
ColumnForm[2].defaultValue=orgt.orgtypename;
});