重金属项目笔记
前台 flex
后台 Java
前台通过FlexViewer调用ArcGIS服务
private var areaListCollection:XMLListCollection=new XMLListCollection(); private var areasdata: ArrayCollection; [Bindable] private var xmls:ArrayCollection = new ArrayCollection(); [Bindable] private var treeXml:XML = <node label="监控点"> <node label='中国' areaCode='000000000000' areaLevel='1' subAreaNum='34'> </node> </node>;
<mx:Tree id="tree1" x="5" y="5" width="400" height="600"
dataProvider="{treeXml}"
selectedItem="{}"
itemClick="tree_itemClick(event);"
labelField="@label" selectionColor="#3DDDDB" showRoot="false">
</mx:Tree>
点击事件处理函数
private function tree_itemClick(evt:ListEvent):void {
var item:Object = evt.currentTarget.selectedItem
var xml:XML=tree1.selectedItem as XML;
var areacode:String = tree1.selectedItem.@areaCode;
var areaLevel:int = tree1.selectedItem.@areaLevel;
var variables:URLVariables=new URLVariables("areaCode="+areacode +"&areaLevel="+areaLevel);
var httpService:HTTPService=new HTTPService();
httpService.useProxy=false;
httpService.resultFormat="e4x";
httpService.url="/lvfulong/getSubAreaData";
httpService.addEventListener(ResultEvent.RESULT,loadComplete);
httpService.addEventListener(FaultEvent.FAULT,faultHandler);
try
{
if(!tree1.selectedItem.hasComplexContent())//判断是否已经有子节点
httpService.send(variables);
trace("获取数据成功！");
}
catch(error:Error)
{
trace("获取数据失败："+error);
}
}
private function loadComplete(event:ResultEvent):void{
var result:XML=new XML(event.result.toString());
areaListCollection.source = result.area;
areasdata = new ArrayCollection(areaListCollection.toArray());
for(var i:int=0;i<areasdata.length;i++){
var o:Object = areasdata.getItemAt(i);
tree1.selectedItem.appendChild("<node label='"+o["areaName"]+"' areaCode='"+o["areaCode"]+"' areaLevel='"+o["areaLevel"]+"' subAreaNum='"+o["subAreaNum"]+"'></node>");
}
}
private function faultHandler(event:FaultEvent):void{
Alert.show(event.toString());
}
Servlet如下
response.setCharacterEncoding("UTF-8");
response.setHeader("content-type","text/html;charset=UTF-8");
PrintWriter out=response.getWriter();
String areaCode=request.getParameter("areaCode");
int areaLevel = Integer.parseInt(request.getParameter("areaLevel"));
// String sql = "select * from area where areaCode = '" + areaCode +"'";
// System.err.println(areaCode.substring(0, 2));
String sql = "";
switch (areaLevel) {
case 1://国
sql = "select * from area where areaCode like '"+areaCode.substring(0, 0)+"__0000000000' and areaCode != '"+areaCode+"'";
break;
case 2://省级，查市
sql = "select * from area where areaCode like '"+areaCode.substring(0, 2)+"__00000000' and areaCode != '"+areaCode+"'";
break;
case 3://市级，查县
sql = "select * from area where areaCode like '"+areaCode.substring(0, 4)+"__000000' and areaCode != '"+areaCode+"'";
break;
case 4://县级，查镇
sql = "select * from area where areaCode like '"+areaCode.substring(0, 6)+"___000' and areaCode != '"+areaCode+"'";
break;
case 5://镇级，查村
sql = "select * from area where areaCode like '"+areaCode.substring(0, 9)+"___' and areaCode != '"+areaCode+"'";
break;
case 6://村级
break;
default:
break;
}
System.out.println(sql);
System.out.println("----");
JAXBContext context;
Connection connection = DBConnection.getConnection();
Statement statement = null;
ResultSet resultSet = null;
try {
List<Area>areas = new ArrayList<Area>();
statement = connection.createStatement();
resultSet = statement.executeQuery(sql);
StringBuffer resultXML=new StringBuffer();
resultXML.append("<?xml version='1.0' encoding='utf-8'?>");
resultXML.append("<root>");
while (resultSet.next()) {
resultXML.append("<area>");
resultXML.append("<areaCode>");
resultXML.append(resultSet.getString("areaCode"));
resultXML.append("</areaCode>");
resultXML.append("<areaName>");
resultXML.append(resultSet.getString("areaName"));
resultXML.append("</areaName>");
resultXML.append("<areaLevel>");
resultXML.append(resultSet.getInt("areaLevel"));
resultXML.append("</areaLevel>");
resultXML.append("<subAreaNum>");
resultXML.append(resultSet.getInt("subAreaNum"));
resultXML.append("</subAreaNum>");
resultXML.append("</area>");
}
resultXML.append("</root>");
System.out.println(resultXML);
out.print(resultXML.toString());
/*测试数据
out.print("<?xml version=\"1.0\" encoding=\"UTF-8\"?>");
out.print("<area>");
out.print("<subAreaNum>");
out.print("14");
out.print("</subAreaNum>");
out.print("<areaName>");
out.print("湖北");
out.print("</areaName>");
out.print("<areaLevel>");
out.print("2");
out.print("</areaLevel>");
out.print("<areaCode>");
out.print("420000000000");
out.print("</areaCode>");
out.print("</area>");
*/
} catch (Exception e) {
//e.printStackTrace();
//当点击村级节点时，case 6，会抛异常
}finally{
DBConnection.close(resultSet, statement, connection);
}
返回的xml数据如下
<?xml version="1.0" encoding="utf-8"?> <root> <area> <areaCode>420100000000</areaCode> <areaName>武汉市</areaName> <areaLevel>3</areaLevel> <subAreaNum>13</subAreaNum> </area> <area> <areaCode>420500000000</areaCode> <areaName>宜昌市</areaName> <areaLevel>3</areaLevel> <subAreaNum>13</subAreaNum> </area> <area> <areaCode>420600000000</areaCode> <areaName>襄阳市</areaName> <areaLevel>3</areaLevel> <subAreaNum>9</subAreaNum> </area> <area> <areaCode>421000000000</areaCode> <areaName>荆州市</areaName> <areaLevel>3</areaLevel> <subAreaNum>8</subAreaNum> </area> <area> <areaCode>421100000000</areaCode> <areaName>黄冈市</areaName> <areaLevel>3</areaLevel> <subAreaNum>10</subAreaNum> </area> </root>
flex tree添加右键菜单
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" fontSize="12">
<mx:Script>
<!--[CDATA[
import mx.controls.Alert;
public var newBuildMenuItem:ContextMenuItem;//菜单项变量
private function init(): void//初始化函数
{
createTreeMenuItem();
tree.contextMenu = getTreeContxtMenu();
}
public function createTreeMenuItem(): void//菜单项创建函数，并添加菜单监听器
{
newBuildMenuItem = new ContextMenuItem("新建");
newBuildMenuItem.addEventListener(ContextMenuEvent.MENU_ITEM_SELECT, newBuildHandler2);
}
private function getTreeContxtMenu(): ContextMenu//将菜单项目添加到菜单中
{
var contextMenu: ContextMenu = new ContextMenu();
contextMenu.hideBuiltInItems();
contextMenu.customItems.push(newBuildMenuItem);
return contextMenu;
}
public function newBuildHandler2(event:Event):void//点击菜单执行函数
{
Alert.show("这是新建的菜单点击后执行的函数");
}
]]-->
</mx:Script>
<mx:Tree id="tree" x="31" y="10" creationComplete="init()"></mx:Tree>
</mx:Application>
Flex Tree 在鼠标移到的时候显示 ToolTip
private function getToolTip(obj:Object):String{
var xml:XML=obj as XML;
return obj.@areaName;
}
<mx:Tree id="projects" width="207" height="100%"
change="selectChange(event)"
dataProvider="{projectdepots}" labelField="@name"
dataTipFunction="getToolTip" showDataTips="true"/>