package barchant;import java.lang.*;import java.util.*;import java.awt.*;import com.mapinfo.mapj.*;import javax.swing.*;import com.mapinfo.beans.vmapj.VisualMapJ;//以下包是用于數據庫oracle的DataProviderimport com.mapinfo.dp.jdbc.oraso.*;import com.mapinfo.dp.jdbc.DriverType;import com.mapinfo.dp.RenditionType;import com.mapinfo.coordsys.CoordSys;import com.mapinfo.mapxtreme.client.MapXtremeDataProviderRef;/** 該實例顯示了怎樣將數據庫中的地圖表作為圖層顯示出來 */public class DataProvider extends JFrame {  public FeatureLayer world;//Feature對象用來訪問地圖對象  public ArrayList cols;  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 Hashtable ht;  public DataProvider() {    try{      //創建地圖      myMap=new VisualMapJ();//以下代碼是數據庫連接實例     String mapXtremeURL = "http://localhost:8088/mapxtreme47/mapxtreme";     OraSoDataProviderHelper oraDPHelper=new OraSoDataProviderHelper("172.23.206.229",1521, "lk", "system", "manager",DriverType.thin, "oracle.jdbc.driver.OracleDriver");      String[] idColumn = {"mi_prinx"};      OraSoTableDescHelper oraTDHelper = new OraSoTableDescHelper("WORLD", false, idColumn, "geoloc", null, RenditionType.none,null, RenditionType.none, null, 2, "SYSTEM");      String s= "select country, pop_1994, capital, geoloc, mi_prinx from world where country='Cuba'";      //OraSoTableDescHelper oraTDHelper = new OraSoTableDescHelper(s, idColumn, "geoloc", null,RenditionType.none, null, RenditionType.none,CoordSys.longLatWGS84, 2);      MapXtremeDataProviderRef mxtDPRef = new MapXtremeDataProviderRef(oraDPHelper, mapXtremeURL);      myMap.getMapJ().getLayers().addLayer(mxtDPRef, oraTDHelper, "Oracle Spatial Layer");      //布局      this.setSize(800,500);      //地圖放中間      this.getContentPane().add(myMap,BorderLayout.CENTER);      this.setVisible(true);      this.show();    }catch(Exception e){      System.out.println("Error");      e.printStackTrace();    }  }  public static void main(String args[]){    DataProvider dp=new DataProvider();  }}