DWR使用心得体会

1关于配置：

web.xml文件

<servlet>

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

<servlet-class>

org.directwebremoting.servlet.DwrServlet

</servlet-class>

<init-param>

<param-name>debug</param-name>

<param-value>false</param-value>

</init-param>

<init-param>

<param-name>scriptCompressed</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>

dwr.xml文件

<!DOCTYPE dwr PUBLIC "-//GetAhead Limited//DTD Direct Web Remoting 2.0//EN" "http://getahead.org/dwr/dwr20.dtd">

<dwr>

<allow>

<create creator="new" javascript="要变成的javascript名" scope="request">

<param name="class" value="类所在的位置" />

</create>

</allow>

</dwr>

2页面配置调用

<script language="javascript" src='${contextPath}/dwr/engine.js'></script>

<script language="javascript" src='${contextPath}/dwr/util.js'></script>

<script language="javascript" src='${contextPath}/dwr/interface/对应dwr.xml中配置的javascript名.js'></script>

<script language="JavaScript" type="text/javascript">

function getTermIds()

{

var brhId = document.getElementById("brhId").value;

GetTermId.getList(brhId,callBack);//调用类中的方法

}

function callBack(ret)//处理获得列表，把数据填写到option里去，让下拉菜单获得atm号

{

var selectobj = document.getElementById("termId");

selectobj.length=0;

for(var i=0;i<ret.length;i++)

{

selectobj.options[selectobj.options.length] = new Option(ret[i],ret[i]);

}

}

</script>

3类中的写法

public class GetTermId  {
public List getList(String brhId)
{
String sql = "select t.terminal_code from tbl_atm_stat t where t.brno='"+brhId+"'";
List termIdList = null;
try {

ICommQueryDAO commQueryDAO = (ICommQueryDAO) ContextUtil.getBean("CommQueryDAOAtmp");
termIdList = commQueryDAO.findBySQLQuery(sql);

} catch (AppException e) {
e.printStackTrace();
}
return termIdList;
}
}

4补充返回特殊自定义类型的写法

<convert converter="bean" match="com.dwr.TestBean">
　　　　　　<param name="include" value="username,password" />
</convert>

<signatures>
<![CDATA[ import java.util.List;
import com.dwr.TestClass;
import com.dwr.TestBean;
TestClass.testMethod7(List<TestBean>);
]]>
</signatures>

for(var i=0;i<data.length;i++)
{
alert(data.username);
alert(data[i].username);//this is ok

}