Flex动态生成Tree
- 我在网上看见的大多数是根据xml来调用的tree,对于我们这样刚刚接触flex的不需要再去翻java后台转xml的方法了。java后台直接生成tree来调用。结合网上的资料,我进行了一下修改和整合,在这里总结一下。
- java代码块
- 使用VO来封装数据库的数据,其中需要有一个类型为List的children属性,由于Tree控件不像DataGrid,List控件,它拥有层次结构。
-
package model;
import java.util.List;
import org.nutz.dao.entity.annotation.Column;
import org.nutz.dao.entity.annotation.Name;
import org.nutz.dao.entity.annotation.Table;
@Table("t_sd_equipment")
public class T_SD_EQUIPMENT {
@Column
private String id;
@Column
private String name;
@Column
private String type;
public T_SD_EQUIPMENT(String id, String name, String type) {
// TODO Auto-generated constructor stub
super();
this.id = id;
this.name = name;
this.type = type;
}
//注意必须加上这个 不然保存的时候会有问题
public T_SD_EQUIPMENT() {
// TODO Auto-generated constructor stub
}
public String getType() {
return type;
}
public void setType(String type) {
this.type = type;
}
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
private List<T_SD_EQUIPMENT> children;
public List<T_SD_EQUIPMENT> getChildren() {
return children;
}
public void setChildren(List<T_SD_EQUIPMENT> children) {
this.children = children;
}
}
- 实现业务层的操作
//tree
//实现第一层文件夹的代码sql语句查询你需要的表数据
public List<T_SD_EQUIPMENT> getTreeList() {
List<T_SD_EQUIPMENT> retList = new ArrayList<>();
if (dao == null) {
DaoUtils.startup();
}
Sql sql = Sqls
.create("SELECT e.`LINE` AS NAME ,e.`OBJ_ID` AS id ,e.`E_TYPE` AS TYPE FROM `t_sd_equipment` e WHERE e.`E_TYPE`='配电室' AND e.`STATION`IS NOT NULL");
sql.setEntity(dao.getEntity(NutMap.class));
sql.setCallback(Sqls.callback.maps());
dao.execute(sql);
List<NutMap> list = sql.getList(NutMap.class);
NutMap m = new NutMap();
try {
for (NutMap nut : list){
T_SD_EQUIPMENT spec = new T_SD_EQUIPMENT(nut.getString("id"), nut.getString("NAME"), "devmaintype");
spec.setChildren(new ArrayList<T_SD_EQUIPMENT>());
retList.add(spec);
}
} catch (Exception e) {
// TODO: handle exception
e.printStackTrace();
}
return retList;
}
//实现第二层文件夹的代码sql语句查询你需要的表数据
public List<T_SD_EQUIPMENT> getSpecListByDevMainTypeID(String id) {
List<T_SD_EQUIPMENT> retList = new ArrayList<>();
if (dao == null) {
DaoUtils.startup();
}
Sql sql = Sqls
.create("SELECT e.`STATION` AS NAME ,e.`OBJ_ID` AS id ,e.`E_TYPE` AS TYPE FROM `t_sd_equipment` e WHERE e.`OBJ_ID`='"+id+"' AND e.`STATION`IS NOT NULL");
sql.setEntity(dao.getEntity(NutMap.class));
sql.setCallback(Sqls.callback.maps());
dao.execute(sql);
List<NutMap> list = sql.getList(NutMap.class);
try {
for (NutMap nut : list){
T_SD_EQUIPMENT spec = new T_SD_EQUIPMENT(nut.getString("id"), nut.getString("NAME"), "spec");
spec.setChildren(new ArrayList<T_SD_EQUIPMENT>());
retList.add(spec);
}
} catch (Exception e) {
// TODO: handle exception
e.printStackTrace();
}
return retList;
}
//实现第三层文件夹的代码sql语句查询你需要的表数据
public List<T_SD_EQUIPMENT> getPropListBySpecID(String id) {
List<T_SD_EQUIPMENT> retList = new ArrayList<>();
if (dao == null) {
DaoUtils.startup();
}
Sql sql = Sqls
.create("SELECT DISTINCT e.`E_TYPE` AS TYPE,e.`F_ID` AS fid FROM `t_sd_equipment` e WHERE e.`F_ID`='"+id+"' AND e.`STATION`IS NOT NULL");
sql.setEntity(dao.getEntity(NutMap.class));
sql.setCallback(Sqls.callback.maps());
dao.execute(sql);
List<NutMap> list = sql.getList(NutMap.class);
try {
for (NutMap nut : list){
T_SD_EQUIPMENT spec = new T_SD_EQUIPMENT(nut.getString("fid"), nut.getString("TYPE"), "prop");
spec.setChildren(new ArrayList<T_SD_EQUIPMENT>());
retList.add(spec);
}
} catch (Exception e) {
// TODO: handle exception
e.printStackTrace();
}
return retList;
}
//实现tree文本的内容
public List<T_SD_EQUIPMENT> getPropListBySpecIDTwo(String id,String type) {
List<T_SD_EQUIPMENT> retList = new ArrayList<>();
if (dao == null) {
DaoUtils.startup();
}
Sql sql = Sqls
.create("SELECT e.`E_NAME` AS NAME,e.`OBJ_ID` AS id ,e.`E_TYPE` AS TYPE FROM `t_sd_equipment` e WHERE e.`F_ID`='"+id+"' AND e.`E_TYPE`='"+type+"' AND e.`STATION`IS NOT NULL");
sql.setEntity(dao.getEntity(NutMap.class));
sql.setCallback(Sqls.callback.maps());
dao.execute(sql);
List<NutMap> list = sql.getList(NutMap.class);
try {
for (NutMap nut : list){
T_SD_EQUIPMENT spec = new T_SD_EQUIPMENT(nut.getString("id"), nut.getString("NAME"), "proptwo");
//这个需要注掉不然会显示文件夹 注掉才能显示文本
// spec.setChildren(new ArrayList<T_SD_EQUIPMENT>());
retList.add(spec);
}
} catch (Exception e) {
// TODO: handle exception
e.printStackTrace();
}
return retList;
}
- flex页面代码
- 首先在Flex中构建一个与Java端实体类对象相映射的VO类——TreeNodeVO。
package components.ZTJC.Components.vo
{
import mx.collections.ArrayCollection;
[Bindable]
[RemoteClass(alias="model.T_SD_EQUIPMENT")]
public class TreeNodeVO
{
public var id:String;
public var name:String;
public var type:String;
public var posx:String;
public var children:ArrayCollection;
public function TreeNodeVO()
{
}
}
}
- 接下来就是MXML文件
-
<?xml version="1.0" encoding="utf-8"?>
<s:TitleWindow xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:s="library://ns.adobe.com/flex/spark"
xmlns:mx="library://ns.adobe.com/flex/mx" width="200" height="400" title="电网资源选择" creationComplete="titlewindow1_creationCompleteHandler(event)" close="titlewindow1_closeHandler(event)">
<fx:Declarations>
<!-- 将非可视元素(例如服务、值对象)放在此处 -->
<s:RemoteObject id="du" destination="DaoUtils"
endpoint="http://localhost:8080/" fault="du_faultHandler(event)">
<s:method name="getTreeList" result="query_getTreeList_resultHandler(event)"/>
<s:method name="getSpecListByDevMainTypeID" result="getSpecListByDevMainTypeID_resultHandler(event)"/>
<s:method name="getPropListBySpecID" result="getPropListBySpecID_resultHandler(event)"/>
<s:method name="getPropListBySpecIDTwo" result="getPropListBySpecIDTwo_resultHandler(event)"/>
</s:RemoteObject>
</fx:Declarations>
<fx:Script>
<![CDATA[
import mx.collections.ArrayCollection;
import mx.controls.Alert;
import mx.events.CloseEvent;
import mx.events.FlexEvent;
import mx.events.TreeEvent;
import mx.managers.PopUpManager;
import mx.managers.SystemManager;
import mx.rpc.events.FaultEvent;
import mx.rpc.events.ResultEvent;
import components.ZTJC.Components.SensorAddTabA;
import components.ZTJC.Components.vo.TreeNodeVO;
import components.ZTJC.Components.vo.TreeVo;
import components.ZTJC.Views.TwAddSensor;
[Bindable]
[ArrayElementType("components.ZTJC.Components.vo.TreeNodeVO")]
public var firstData:ArrayCollection=new ArrayCollection();
[Bindable]
// private var selectedNode:TreeNodeVO;
private var selectedNode:Object;
protected function du_faultHandler(event:FaultEvent):void
{
// TODO Auto-generated method stub
Alert.show(event.fault.message);
}
protected function query_getTreeList_resultHandler(event:ResultEvent):void {
firstData = event.result as ArrayCollection;
}
protected function getSpecListByDevMainTypeID_resultHandler(event:ResultEvent):void
{
selectedNode.children=event.result as ArrayCollection;
firstData.itemUpdated(selectedNode);
}
protected function getPropListBySpecID_resultHandler(event:ResultEvent):void
{
selectedNode.children=event.result as ArrayCollection;
firstData.itemUpdated(selectedNode);
}
protected function getPropListBySpecIDTwo_resultHandler(event:ResultEvent):void
{
selectedNode.children=event.result as ArrayCollection;
firstData.itemUpdated(selectedNode);
}
protected function specTree_itemOpeningHandler(event:TreeEvent):void
{
// selectedNode=event.item as TreeNodeVO;
selectedNode=event.item;
if(!equipTree.isItemOpen(event.item)&&event.item.children.length==0)
{
if(selectedNode.type=="devmaintype")
du.getSpecListByDevMainTypeID(event.item.id);
else if(selectedNode.type=="spec")
du.getPropListBySpecID(event.item.id);
else if(selectedNode.type=="prop")
du.getPropListBySpecIDTwo(event.item.id,event.item.name);
}
}
protected function titlewindow1_creationCompleteHandler(event:FlexEvent):void
{
du.getTreeList();
}
protected function titlewindow1_closeHandler(event:CloseEvent):void
{
// TODO Auto-generated method stub
PopUpManager.removePopUp(this);
}
]]>
</fx:Script>
<mx:Tree id="equipTree" width="100%" height="100%" dataProvider="{firstData}" labelField="name"
itemOpening="specTree_itemOpeningHandler(event)"
visible="true" showRoot="true" >
</mx:Tree>
</s:TitleWindow>