dwr下柆框与列表框联动的实现
实现 联动 DWR 列表框
2023-09-14 08:57:15 时间
首先配置好dwr框架所需的文件。
dwr的配置过程：
[i]在/WEB-INF/lib中加入dwr.jar文件[/i]
[i]在web.xml中加载dwr对应的servlet[/i]
[code]<servlet>
<servlet-name>dwr</servlet-name>
<servlet-class>org.directwebremoting.servlet.DwrServlet</servlet-class>
<init-param>
<param-name>debug</param-name>
<param-value>true</param-value>
</init-param>
</servlet>
<servlet-mapping>
<servlet-name>dwr</servlet-name>
<url-pattern>/dwr/*</url-pattern>
</servlet-mapping>
[/code]
[i]在/WEB-INF/中加入dwr.xml文件[/i]
[code]
<?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="spring" javascript="bmgl">
<param name="beanName" value="BmglService"/>
<include method="checkBmId" />
</create>
<create creator="spring" javascript="JcyqlbService" >
<param name="beanName" value="JcyqlbService"/>
<include method="findJcyqlb" />
</create>
<create creator="spring" javascript="reportManageService" >
<param name="beanName" value="reportManageService"/>
<include method="isHaveBackReport" />
</create>
<create creator="spring" javascript="YwslService" >
<param name="beanName" value="YwslService"/>
<include method="getBmList" />
<include method="getDeviceList" />
<include method="findDeviceBySydw" />
<include method="findGcjyDeviceBySydw" />
<include method="getDeviceCheckState" />
<include method="validateSbJynr" />
<include method="getSbYxzt" />
<include method="findBargainByEmployId" />
<include method="findBargainUrl" />
<include method="getCooperateCorporation" />
<include method="findAllGgSbjcByGzdid" />
<include method="findAllGgSbjcByTzsbbhs" />
<include method="findAllHtByid" />
</create>
<create creator="spring" javascript="GjxwhService" >
<param name="beanName" value="GjxwhService"/>
<include method="findRy" />
<include method="getAllYqList" />
</create>
<create creator="spring" javascript="xtSbzlService" >
<param name="beanName" value="xtSbzlService"/>
<include method="findSbzlList" />
<include method="findJyxzList" />
<include method="findJynrList" />
<include method="findGcjyJynrList" />
<include method="findSbpzList" />
<include method="findStaySbpzList" />
</create>
<convert converter="bean" match="com.syscanhc.tjy.data.bo.GgGjx">
<param name="include" value="id, gjxmc" />
</convert>
<convert converter="bean" match="com.syscanhc.tjy.data.bo.TbmBmk">
<param name="include" value="dm,sm" />
</convert>
<create javascript="QueryManagerDAO" creator="new">
<param name="class" value="com.syscanhc.tjy.data.dao.impl.QueryManagerDAO"></param>
</create>
<convert match="map" converter="java.util.Map"></convert>
</allow>
</dwr>
[/code]
[i]在jsp加入如下内容[/i]
[code]<%@ taglib uri="/WEB-INF/struts-bean.tld" prefix="bean"%>
<%@ taglib uri="/WEB-INF/struts-html.tld" prefix="html"%>
<%@ taglib uri="/WEB-INF/struts-logic.tld" prefix="logic"%>
<%@ page contentType="text/html; charset=GBK"%>
<html>
<head>
<link href="css/style.css" rel="stylesheet" type="text/css">
<script language="JavaScript" src="js/system.js"></script>
<script type="text/javascript" src=dwr/engine.js></script>
<script type="text/javascript" src=dwr/util.js></script>
<script type="text/javascript" src="dwr/interface/QueryManagerDAO.js"></script>
<script language="javascript" type="text/javascript">
function show(items)
{
DWRUtil.removeAllOptions(startSelects);
DWRUtil.addOptions(startSelects,["====待选择查询字段===="]);
DWRUtil.addOptions(startSelects,items);
}
function getItems()
{
QueryManagerDAO.getTableColumn($(tableName).value,show);
}
</script>
<title>动态查询主页面</title>
</head>
<body >
<table border="0" cellspacing="0" cellpadding="0" width="50%" id="table1">
<html:form action="/query_Gzd?method=setOptions" method="post">
<tr><td>
<html:select property="tableName" styleClass="inputtext" οnchange="getItems();">
<html:options collection="tableItems" labelProperty="key" property="value"/>
</html:select></td></tr>
<tr>
<td>
<table width="100%" border="0" cellspacing="0" class="DefaultTable">
<tr class="sysdisplay">
<td align="right"> </td>
<td>
<html:select property="startSelects" styleClass="inputtext"
size="10" multiple="true">
<html:option value="">====待选择查询字段====</html:option>
<html:options collection="gzdItems" labelProperty="value" property="key"/>
</html:select></td>
<td align="center"><input type="button" value="添加>>"
class="btn2" onClick="addItem()">
<p>
<p><input type="button" value="<<移除" class="btn2"
onClick="deleteItem()">
</td>
<td><html:select property="endSelects" style="weight:80px"
styleClass="inputtext" size="10" multiple="true">
<html:option value="">====已选择查询字段====</html:option>
</html:select></td>
</tr>
<tr class="sysdisplay">
<td colspan="4" align="center"><input type="button"
value="确 定" class="btn2" οnclick="submitOptions();"> <input
type="button" name="Submit32" onClick="window.close();"
class="btn2" value="关 闭"></td>
</tr>
</table>
</td>
</tr>
</html:form>
</table>
<script language="javascript">
<!--
function submitOptions()
{
var result="";
var selto = document.getElementById("endSelects");
for(var i=selto.options.length-1;i>=1;i--)
{
result=result+selto.options[i].text+",";
}
if(result.length>0){
result = result.substr(0,result.length-1);
}
gzdSearchForm.resultList.value=result;
var ss= window.confirm("是否保存查询条件？");
if(ss) {
var searchName=window.showModalDialog("saveTempl.html",window,"dialogHeight:100px,center:yes,resizable:no,status:no");
gzdSearchForm.action=gzdSearchForm.action+"&searchName="+searchName;
}
gzdSearchForm.submit();
}
function addItem()
{
var selfrom=document.getElementById("startSelects");
var selto=document.getElementById("endSelects");
for(var i=selfrom.options.length-1;i>=1;i--)
{
if(selfrom.options[i].selected)
{
var index = selto.length;
selto.options[index]=new Option(selfrom.options[i].text,selfrom.options[i].value);
selfrom.remove(i);
}
}
}
function deleteItem()
{
var selto=document.getElementById("startSelects");
var selfrom=document.getElementById("endSelects");
for(var i=selfrom.options.length-1;i>=1;i--)
{
if(selfrom.options[i].selected)
{
selto.options[selto.length]=new Option(selfrom[i].text,selfrom[i].value);
selfrom.remove(i);
}
}
}
//-->
</script>
</body>
</html>
[/code]
〉〉〉〉〉〉〉〉〉〉〉〉〉〉〉〉〉〉〉〉〉〉〉〉〉〉〉〉〉〉〉〉〉〉〉〉
有几点要注意：
dwr.xml是声明的类名要与页面中声明的类名一致，如
<script type="text/javascript" src="dwr/interface/[color=red]QueryManagerDAO[/color].js"></script>
与dwr.xml中
<create javascript="QueryManagerDAO" creator="new">
<param name="class" value="com.syscanhc.tjy.data.dao.impl.[color=red]QueryManagerDAO[/color]"></param>
</create>
另外，QueryManagerDAO.getTableColumn()方法中如用到javaBean或者其它对象要在<convert</convert>中声明。如：
<convert match="map" converter="java.util.Map"></convert>
注意[code]
DWRUtil.removeAllOptions(startSelects);
DWRUtil.addOptions(startSelects,["====待选择查询字段===="]);
DWRUtil.addOptions(startSelects,items);[/code]的用法
items的类型为java.util.Map
["====待选择查询字段===="]为Array
DWRUtil.addOptions(startSelects,items,[b]true[/b])表示将显示的key与value互换显示
[b]show[/b]为一回调函数，返回的结果在function show(items){}的items中
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