ArcGIS Server for Flex 常用代码
java
将json格式的xy值转为点对象
1 private IGeometry getGeometryFromXYs(String xys) {
2 IGeometry geo = null;
3 try {
4 if (xys == null)
5 return null;
6 JSONArray jsonArray = new JSONArray(xys);
7 int count = jsonArray.length();
8 if (count < 1) {
9 return null;
10 } else if (count == 1) { // point
11
12 try {
13 JSONObject jo = jsonArray.getJSONObject(0);
14 Point p = new Point();
15 p.setX(jo.getDouble("x"));
16 p.setY(jo.getDouble("y"));
17 return (IGeometry) p;
18 } catch (AutomationException e) {
19 e.printStackTrace();
20 return null;
21 } catch (IOException e) {
22 e.printStackTrace();
23 return null;
24 }
25
26 }
27
28 for (int i = 0; i < jsonArray.length(); i++) {
29 System.out.println("item " + i + " :" + jsonArray.getString(i));
30
31 }
32 } catch (JSONException e) {
33 e.printStackTrace();
34 }
35 return null;
36 }
初始化server
1 public void initServer() {
2 /** * 连接到ArcGIS Sever */
3 try {
4 new ServerInitializer().initializeServer(domain, user, password);
5 conn = new ServerConnection();
6 conn.connect(host);
7 som = conn.getServerObjectManager();
8 serverContext = som.createServerContext(servicesName, "MapServer");
9 mapserver = (MapServer) serverContext.getServerObject();
10 maps = mapserver.getMap(mapserver.getDefaultMapName());
11 System.out.print("已连接到ArcGIS Sever");
12 } catch (Exception e) {
13 e.printStackTrace();
14 mapserver = null;
15 maps = null;
16 som = null;
17 }
18 }
新增feature
1 /*
2 * 执行添加feature的操作
3 * tablename:表名
4 * map：待保存的feature各属性键值对
5 * geo：待保存的feature的geometry
6 */
7 private boolean StoreFeature(String tablename, Map<String, String> map,
8 IGeometry geo) {
9 // 先判断Server的连接状态
10 if (maps == null || mapserver == null || som == null
11 || serverContext == null || conn == null)
12 this.initServer();
13 if (maps == null || mapserver == null || som == null
14 || serverContext == null || conn == null) {
15 System.out.print("不能连接到ArcGIS Server!");
16 return false;
17 }
18 try {
19 IFeatureLayer pFeatLayer = (IFeatureLayer) serverContext
20 .createObject(FeatureLayer.getClsid());
21 pFeatLayer = getFeatureLayer(maps, tablename);
22
23 IFeatureClass pfeatureclass = pFeatLayer.getFeatureClass();
24 geo.setSpatialReferenceByRef(maps.getSpatialReference());
25 IDataset dataset = new IDatasetProxy(pfeatureclass);
26
27 // begin edit
28 IWorkspaceEdit pWorkspaceEdit = new IWorkspaceEditProxy(dataset
29 .getWorkspace());
30 pWorkspaceEdit.startEditing(true);
31 pWorkspaceEdit.startEditOperation();
32
33 // set field value
34 IFeatureBuffer featureBuffer = pfeatureclass.createFeatureBuffer();
35 IFeatureCursor featureCursor = new FeatureCursor(pfeatureclass
36 .IFeatureClass_insert(true));
37 featureBuffer.setShapeByRef(geo);
38
39 if (map != null) {
40 for (Object o : map.keySet()) {
41 String field = String.valueOf(o);
42 int index = featureBuffer.getFields().findField(field);
43 if (index >= 0) {
44 // do not store objectid
45 if (field.indexOf("OBJECTID") == -1) {
46 featureBuffer.setValue(featureBuffer.getFields()
47 .findField(field), map.get(o));
48 }
49 }
50 }
51 }
52 featureCursor.insertFeature(featureBuffer);
53 featureCursor.flush();
54 pWorkspaceEdit.stopEditOperation();
55 pWorkspaceEdit.stopEditing(true);
56 System.out.print("\n已添加！");
57 Cleaner.release(featureBuffer);// release Point of AO
58 mapserver.refreshServerObjects();
59 serverContext.releaseContext();
60 } catch (Exception e) {
61 e.printStackTrace();
62 try {
63 mapserver.refreshServerObjects();
64 serverContext.releaseContext();
65 } catch (AutomationException e1) {
66 e1.printStackTrace();
67 } catch (IOException e1) {
68 e1.printStackTrace();
69 } finally {
70 mapserver = null;
71 maps = null;
72 som = null;
73 return false;
74 }
75 }
76 return true;
77 }
删除feature
1 //delete single feature
2 public boolean deleteFeature(String tablename,int id ){
3 // 先判断Server的连接状态
4 if (maps == null || mapserver == null || som == null
5 || serverContext == null || conn == null)
6 this.initServer();
7 if (maps == null || mapserver == null || som == null
8 || serverContext == null || conn == null) {
9 System.out.print("不能连接到ArcGIS Server!");
10 return false;
11 }
12 try {
13
14 IFeatureLayer pFeatLayer = (IFeatureLayer) serverContext
15 .createObject(FeatureLayer.getClsid());
16 pFeatLayer = getFeatureLayer(maps, tablename);
17
18 IFeatureClass pfeatureclass = pFeatLayer.getFeatureClass();
19 IDataset dataset = new IDatasetProxy(pfeatureclass);
20 // begin edit
21 IWorkspaceEdit pWorkspaceEdit = new IWorkspaceEditProxy(dataset
22 .getWorkspace());
23 pWorkspaceEdit.startEditing(true);
24 pWorkspaceEdit.startEditOperation();
25
26 IFeature feature=pfeatureclass.getFeature(id);
27 if(feature!=null)
28 feature.delete();
29 pWorkspaceEdit.stopEditOperation();
30 pWorkspaceEdit.stopEditing(true);
31 System.out.print("\n已删除！");
32 mapserver.refreshServerObjects();
33 serverContext.releaseContext();
34 } catch (Exception e) {
35 e.printStackTrace();
36 try {
37 mapserver.refreshServerObjects();
38 serverContext.releaseContext();
39 } catch (AutomationException e1) {
40 // TODO Auto-generated catch block
41 e1.printStackTrace();
42 } catch (IOException e1) {
43 // TODO Auto-generated catch block
44 e1.printStackTrace();
45 } finally {
46 mapserver = null;
47 maps = null;
48 som = null;
49
50 return false;
51 }
52 }
53 return true;
54 }
更新feature属性
1 //update fields(without geometry)
2 public boolean updateFields(String tablename,int id,Map<String, String> map){
3 // 先判断Server的连接状态
4 if (maps == null || mapserver == null || som == null
5 || serverContext == null || conn == null)
6 this.initServer();
7 if (maps == null || mapserver == null || som == null
8 || serverContext == null || conn == null) {
9 System.out.print("不能连接到ArcGIS Server!");
10 return false;
11 }
12 try {
13 IFeatureLayer pFeatLayer = (IFeatureLayer) serverContext
14 .createObject(FeatureLayer.getClsid());
15 pFeatLayer = getFeatureLayer(maps, tablename);
16
17 IFeatureClass pfeatureclass = pFeatLayer.getFeatureClass();
18 IDataset dataset = new IDatasetProxy(pfeatureclass);
19
20 // begin edit
21 IWorkspaceEdit pWorkspaceEdit = new IWorkspaceEditProxy(dataset
22 .getWorkspace());
23 pWorkspaceEdit.startEditing(true);
24 pWorkspaceEdit.startEditOperation();
25
26 IFeature feature=pfeatureclass.getFeature(id);
27 if (map != null) {
28 for (Object o : map.keySet()) {
29 String field = String.valueOf(o);
30 int index = feature.getFields().findField(field);
31 if (index >= 0) {
32 // do not store objectid
33 if (field.indexOf("OBJECTID") == -1) {
34 feature.setValue(feature.getFields()
35 .findField(field), map.get(o));
36 }
37 }
38 }
39 }
40 feature.store();
41 pWorkspaceEdit.stopEditOperation();
42 pWorkspaceEdit.stopEditing(true);
43 System.out.print("\n操作成功！");
44 mapserver.refreshServerObjects();
45 serverContext.releaseContext();
46 } catch (Exception e) {
47 e.printStackTrace();
48 try {
49 mapserver.refreshServerObjects();
50 serverContext.releaseContext();
51 } catch (AutomationException e1) {
52 // TODO Auto-generated catch block
53 e1.printStackTrace();
54 } catch (IOException e1) {
55 // TODO Auto-generated catch block
56 e1.printStackTrace();
57 } finally {
58 mapserver = null;
59 maps = null;
60 som = null;
61
62 return false;
63 }
64 }
65 return true;
66 }
flex
得到Geometry的n倍范围
1 //get N * size extent from geometry
2 public static function getNExtentFromGeo(geo:Geometry,n:Number):Extent{
3 var extent:Extent=getExtentFromGeo(geo);
4 var newExtent:Extent=new Extent();
5 newExtent.xmax=extent.xmax+extent.width*(n-1)/2;
6 newExtent.xmin=extent.xmin-extent.width*(n-1)/2;
7 newExtent.ymax=extent.ymax+extent.height*(n-1)/2;
8 newExtent.ymin=extent.ymin-extent.height*(n-1)/2;
9 return newExtent;
10 }
得到点的缓冲范围
1 //get extent from geometry
2 public static function getBuffExtentOfPoint(point:MapPoint,buffer:Number):Extent{
3 var extent:Extent=new Extent(point.x-buffer,point.y-buffer,point.x+buffer,point.y+buffer);
4 return extent;
5 }
得到geometry的范围
1 //get extent from geometry
2 public static function getExtentFromGeo(geo:Geometry):Extent{
3 var extent:Extent=new Extent();
4 switch (geo.type) {
5 case Geometry.MAPPOINT: {
6 extent=getBuffExtentOfPoint(geo as MapPoint,0.01);
7 break;
8 }
9 case Geometry.POLYLINE: {
10 var polyline:Polyline=geo as Polyline;
11 extent=polyline.extent;
12 break;
13 }
14 case Geometry.POLYGON: {
15 var poly:Polygon=geo as Polygon;
16 extent=poly.extent;
17 break;
18 }
19 }
20 return extent;
21 }
得到整个graphicLayer的图形范围
1 //get graphicslayer's extent
2 public static function getGraphicsExtent(graphicsLayer:GraphicsLayer):Extent{
3
4 var extent:Extent=null;
5 var tempExtent:Extent=null;
6 var graphic:Graphic=null;
7 var geo:Geometry=null;
8 for(var i:int=0;i<graphicsLayer.numGraphics;i++)
9 {
10 graphic=Graphic(graphicsLayer.getChildAt(i));
11 geo=graphic.geometry;
12 tempExtent=getNExtentFromGeo2(geo,10);
13 if(extent==null){
14 extent=tempExtent;
15 }else{
16 extent=extent.union(tempExtent);
17 }
18 }
19
20 return extent;
21 }
得到几何对象的中心点
1 //得到几何对象的中心点
2 public static function getGeomCenter(geom:Geometry):MapPoint
3 {
4 var pt:MapPoint;
5 switch (geom.type)
6 {
7 case Geometry.MAPPOINT:
8 {
9 pt = geom as MapPoint;
10 break;
11 }
12
13 case Geometry.POLYLINE:
14 {
15 var pl:Polyline = geom as Polyline;
16 pt = pl.extent.center;
17 if(pl.paths != null && pl.paths.length>0){
18 var path:Array = pl.paths[0];
19 if(path != null && path.length > 0){
20 var mid:int = path.length/2;
21 pt = path[mid];
22 if(path.length == 2){ // path里面只有两个点的情况
23 //pt.x = pl.getPoint(0,path[0]).x;
24 var x1:Number = (path[0] as MapPoint).x;
25 var y1:Number = (path[0] as MapPoint).y;
26 var x2:Number = (path[1] as MapPoint).x;
27 var y2:Number = (path[1] as MapPoint).y;
28 pt.x = x2 + (x1 - x2)/2 ;
29 pt.y = y2 + (y1 - y2)/2;
30 }
31 }
32 }
33
34 //pl.getPoint(pl.paths[0],pl.paths[0][]);
35 break;
36 }
37
38 case Geometry.POLYGON:
39 {
40 var poly:Polygon = geom as Polygon;
41 pt = poly.extent.center;
42 break;
43 }
44 }
45 return pt;
46 }
根据包含坐标的json字符串生成几何对象
1 //根据包含坐标的json字符串生成几何对象
2 public static function getGeoFromXYs(xys:String):Geometry{
3
4 var geo:Geometry=null;
5
6 //对xys进行解析,转换为geometry
7 var data:String = xys.replace( /\s/g, '' );
8 var collection:ArrayCollection = new ArrayCollection(JSON.decode(data) as Array);
9 var count:int=collection.length;
10 if(count<1){ //no xy information
11 Alert.show("无坐标信息！");
12 }else if(count==1){ //point
13
14 var point:MapPoint=new MapPoint(collection[0].x,collection[0].y);
15 geo=point as Geometry;
16 }else if(count>1){
17 if(collection[0].x==collection[count-1].x && collection[0].y==collection[count-1].y ){ //polygon
18 var paths:Array=new Array();
19 var path:Array=new Array();
20 for(var i:int=0;i<=count-1;i++){
21 var p:MapPoint=new MapPoint(collection[i].x,collection[i].y);
22 path.push(p);
23 }
24 paths.push(path);
25 var po:Polygon=new Polygon(paths,null);
26 geo=po as Geometry;
27 }else{ //line
28 var paths:Array=new Array();
29 var path:Array=new Array();
30 for(var i:int=0;i<=count-1;i++){
31 var p:MapPoint=new MapPoint(collection[i].x,collection[i].y);
32 path.push(p);
33 }
34 paths.push(path);
35 var line:Polyline=new Polyline(paths,null);
36 geo=line as Geometry;
37 }
38 }
39 return geo;
40 }
从json字符串中加载graphics
1 //add graphics from jsonString
2 public static function addGraphicsFromJsonString(glayer:GraphicsLayer,jsonString:String):void{
3
4 var data:String = jsonString.replace( /\s/g, '' );
5 var obj:Object = JSON.decode(data) as Object;
6 var tableName:String=obj.tablename;//tablename
7 var type:int=obj.type;//0:point 1:polyline 2:polygon
8 var id:int=obj.id; // polyline||polygon 's id
9 var xys:Array=obj.geodata; //xy json array
10 var count:int=xys.length;
11 var i:int=0;
12 var geo:Geometry=null;
13 var graphic:Graphic=null;
14 var infoData:Object =null;//store info data
15
16 if(type==0){//points
17 for(i=0;i<count;i++){
18 var point:MapPoint=new MapPoint(xys[i].x,xys[i].y);
19 geo=point as Geometry;
20 graphic=getGraphicFromGeo(geo);
21 infoData =
22 {
23 tablename: tableName,
24 id:xys[i].id
25 };
26 graphic.attributes=infoData;
27 glayer.add(graphic);
28 }
29 }else if(type==1){//polyline
30 var paths:Array=new Array();
31 var path:Array=new Array();
32 for(i=0;i<=count-1;i++){
33 var p:MapPoint=new MapPoint(xys[i].x,xys[i].y);
34 path.push(p);
35 }
36 paths.push(path);
37 var polyline:Polyline=new Polyline(paths,null);
38 geo=polyline as Geometry;
39
40 infoData =
41 {
42 tablename: tableName,
43 id:id
44 };
45 graphic=getGraphicFromGeo(geo);
46 graphic.attributes=infoData;
47 glayer.add(graphic);
48 }else if(type==2){//polygon
49 var paths1:Array=new Array();
50 var path1:Array=new Array();
51 for(i=0;i<=count-1;i++){
52 var p1:MapPoint=new MapPoint(xys[i].x,xys[i].y);
53 path1.push(p1);
54 }
55 paths1.push(path1);
56 var polygon:Polygon=new Polygon(paths1,null);
57 geo=polygon as Geometry;
58
59 infoData =
60 {
61 tablename: tableName,
62 id:id
63 };
64 graphic=getGraphicFromGeo(geo);
65 graphic.attributes=infoData;
66 glayer.add(graphic);
67 }
68 }
根据几何对象生成渲染后的图形
1 //根据几何对象生成渲染后的图形
2 public static function getGraphicFromGeo(geo:Geometry):Graphic{
3
4 var sls:SimpleLineSymbol = new SimpleLineSymbol(SimpleLineSymbol.STYLE_SOLID, 0xFF0000, 0.8,4);
5 var sms:SimpleMarkerSymbol = new SimpleMarkerSymbol(SimpleMarkerSymbol.STYLE_CIRCLE, 30, 0xFF0000, 0.5);
6 var sfs:SimpleFillSymbol = new SimpleFillSymbol(SimpleFillSymbol.STYLE_SOLID, 0xFF0000, 0.1);
7 sfs.outline = new SimpleLineSymbol(SimpleLineSymbol.STYLE_SOLID, 0xFF0000, 1.0, 2);
8
9 var g:Graphic=null;
10 switch (geo.type)
11 {
12 case Geometry.MAPPOINT: {
13 g=new Graphic(geo,sms,null);
14 break;
15 }
16 case Geometry.POLYLINE: {
17 g=new Graphic(geo,sls,null);
18 break;
19 }
20 case Geometry.POLYGON: {
21 g=new Graphic(geo,sfs,null);
22 break;
23 }
24 }
25 return g;
26 }
用点对graphicLayer进行查询
1 //query graphic by point
2 public static function queryGraphicByPoint(graphicsLayer:GraphicsLayer,point:MapPoint): Graphic {
3 var extent:Extent = getBuffExtentOfPoint(point,0.02);
4 var graphic: Graphic= null;
5 var geo:Geometry=null;
6 var tempExtent:Extent=null;
7
8 for(var i:int=0;i<graphicsLayer.numGraphics;i++)
9 {
10 graphic=Graphic(graphicsLayer.getChildAt(i));
11 geo=graphic.geometry;
12 tempExtent=getNExtentFromGeo(geo,3);
13 if(ifTwoExtentsIntersect(extent,tempExtent)){
14 return graphic;
15 }
16 }
17 return null;
18 }
判断两个范围是否相交
1 //judge if two extents intersect
2 public static function ifTwoExtentsIntersect(extent1:Extent,extent2:Extent):Boolean{
3
4 var point11:MapPoint=new MapPoint(extent1.xmin,extent1.ymin,null);
5 var point12:MapPoint=new MapPoint(extent1.xmax,extent1.ymin,null);
6 var point13:MapPoint=new MapPoint(extent1.xmin,extent1.ymax,null);
7 var point14:MapPoint=new MapPoint(extent1.xmax,extent1.ymax,null);
8 var point21:MapPoint=new MapPoint(extent2.xmin,extent2.ymin,null);
9 var point22:MapPoint=new MapPoint(extent2.xmax,extent2.ymin,null);
10 var point23:MapPoint=new MapPoint(extent2.xmin,extent2.ymax,null);
11 var point24:MapPoint=new MapPoint(extent2.xmax,extent2.ymax,null);
12 if( ifPointInExtent(point11,extent2)||ifPointInExtent(point12,extent2)||
13 ifPointInExtent(point13,extent2)||ifPointInExtent(point14,extent2)||
14 ifPointInExtent(point21,extent1)||ifPointInExtent(point22,extent1)||
15 ifPointInExtent(point23,extent1)||ifPointInExtent(point24,extent1)){
16
17 return true;
18 }
19
20 return false;
21 }
判断点是否在范围内
1 //judge if point in extent
2 public static function ifPointInExtent(point:MapPoint,extent:Extent):Boolean{
3 //Alert.show("point.x="+point.x+"extent.xmax="+extent.xmax+"extent.xmin="+extent.xmin+
4 //"point.y="+point.y+"extent.ymax="+extent.ymax+"extent.ymin="+extent.ymin);
5 if(point.x<extent.xmax&&point.x>extent.xmin&&point.y<extent.ymax&&point.y>extent.ymin){
6 return true;
7 }
8 return false;
9 }
end
