package barchant;import java.util.*;import com.mapinfo.dp.*;import com.mapinfo.util.*;import com.mapinfo.beans.vmapj.VisualMapJ;import com.mapinfo.mapj.FeatureLayer;import com.mapinfo.dp.util.RewindableFeatureSet;/*該示例演示了有關圖元的一些方法，成功*/public class FeatureTest { public FeatureLayer world;//Feature對象用來訪問地圖對象 public VisualMapJ myMap;//可管理地圖集的各種狀態，并向服務器轉發客戶請求  public FeatureTest() {  List columns = new ArrayList();  Feature ftr;  Geometry geom;  DoubleRect rect;  DoublePoint dblPnt;  PointGeometry pntGeometry;  VectorGeometry vectorGeometry;  PointList pntList;  Attribute attrib;  int attribCount;    try{      //創建地圖      myMap=new VisualMapJ();      myMap.getMapJ().loadMapDefinition("d:\\program files\\MapInfo\\MapXtreme-4.7.0\\examples\\server\\data\\local\\world.mdf");      //mdf是地圖定義文件      world=(FeatureLayer)myMap.getMapJ().getLayers().get("World Countries");//得到World Countries圖層     // Get the Table information from the FeatureLayer      TableInfo tabInfo = world.getTableInfo();     // fill vector with Column names    // System.out.println("tableColumnCount="+tabInfo.getColumnCount());      for (int i=0;i<tabInfo.getColumnCount();i++)      {        columns.add(tabInfo.getColumnName(i));       // System.out.println("columnName="+tabInfo.getColumnName(i));      }     // 搜索有幾條紀錄，放到可回讀的圖元集中     RewindableFeatureSet rFtrSet = new RewindableFeatureSet(world.searchAll(columns, null));     // 得到第一個圖元，圖元集中的圖元沒有順序     ftr=rFtrSet.getNextFeature();     // then loop through all features in the layer     while (ftr!=null)    {/* get the first attribute (columnData) from the feature Note: Ifyou want to re-use the Attribute object later on (after thegetNextFeature loop), you would need to make a copy of theAttribute object, using the copy constructor.*/      //得到一個圖元的第一個屬性     attrib = ftr.getAttribute(0);     System.out.println("attribute="+attrib.toString());     //得到一個圖元的屬性數目     attribCount = ftr.getAttributeCount();     System.out.println("attributeCount="+attribCount);     //得到幾何信息     geom = ftr.getGeometry();     //如果該元素是點      if (geom.getType()==Geometry.TYPE_POINT)      {       System.out.println("aaaaaaaaaaaa");     //把該元素轉換成點元素      pntGeometry = (PointGeometry)geom;     //得到該點元素的邊界      rect = pntGeometry.getBounds();      System.out.println(rect.toString());     //得到該點元素的標注位置      dblPnt = pntGeometry.getLabelPoint(null);      }      else //如果不是點元素，就可用VectorGeometry來存儲      {     //將元素轉換成 Vector geometry      vectorGeometry = (VectorGeometry)geom;     // get the minimum bounding rectangle for the feature      rect = vectorGeometry.getBounds();     // get the x,y location where the feature’s label will be anchored      dblPnt = vectorGeometry.getLabelPoint(null);      System.out.println("dblPnt:"+dblPnt.toString());      double[] pnts;      int offset=0;      int numPts;// Loop through all the point groups and then put the points into an array      //無論是線元素還是區域都是由點構成的      for (int i=0;i<vectorGeometry.getPointListCount();++i)      {        // Get the next Point List      pntList = vectorGeometry.getNextPointList();        // determine the number of Points in the point group      numPts = pntList.getPointCount();        // Create the point array large enough to hold all the points      pnts = new double[numPts];       // Call getNextPoints which will put the points into the array      pntList.getNextPoints(pnts, offset, numPts/2);      //System.out.println("numPts="+numPts);      }      }      // Get the next feature      ftr=rFtrSet.getNextFeature();      }      // Rewind the FeatureSet to prepare for future use重新回到第一個圖元      rFtrSet.rewind();    }catch(Exception e){        System.out.println("Error");        e.printStackTrace();      }    }    public static void main(String args[]){    FeatureTest bclr=new FeatureTest(); }}