ArcGIS数据文件分为3种：shapefile,Coverage,Geodatabase。
shapefile一种基于文件方式存储GIS数据的文件格式，至少由shp,dbf,shx三个文件组成。分别存储空间，属性，2者关系。是GIS中比较通用的数据格式。
Coverage是一种矢量文件格式，几何和空间拓扑关系存储在二进制文件中，与之相关的属性数据则存放在INFO表或RDBMS中（PC ArcInfo存储在DBF表中）。Coverage是对要素类组织后（feature class）的集合，每个要素类都是一些点、线、面、annotation（文本）的集合。
Geodatabase一种基于RDBMS存储的数据格式。其有两大类：1、Personal Geodatabase用来存储小数据量数据。存储在Access的mdb格式中。2、ArcSDE eodatabase用来存储大型数据。存储在大型数据库中，可实行并发操作，不过需要单独的用户许可。
对于ArcGIS数据文件，ESRI为JAVA语言提供了ArcEngine类库来进行ArcGIS的一切开发。对于ArcGIS3种数据文件的连接提供了统一的接口IWorkSpace，根据具体的数据有不同的实现类来实现数据文件的连接，而数据读取的方法一样，所以可以试用一个工厂模式写个工具类来统一获取3种数据。
需要导入arcobjects.jar
工厂模式连接数据统一接口：
import com.esri.arcgis.geodatabase.IFeatureClass;
public interface ConnectDataSource {
public IFeatureClass getDataSource(String path,String className);
}
连接shape实现类：
import java.io.IOException;
import com.esri.arcgis.datasourcesfile.ShapefileWorkspaceFactory;
import com.esri.arcgis.geodatabase.IFeatureClass;
import com.esri.arcgis.geodatabase.Workspace;
import com.fjdz.inf.ConnectDataSource;
public class ConnectShape implements ConnectDataSource {
IFeatureClass featureClass =null;
public IFeatureClass getDataSource(String path, String className) {ShapefileWorkspaceFactory shapefileWorkspaceFactory;try {shapefileWorkspaceFactory = new ShapefileWorkspaceFactory();Workspace workspace = new Workspace(shapefileWorkspaceFactory.openFromFile(path, 0));featureClass = workspace.openFeatureClass(className);}catch (IOException e) {e.printStackTrace();}
return featureClass;
}
}
连接mdb:
import java.io.IOException;
import com.esri.arcgis.datasourcesGDB.AccessWorkspaceFactory;
import com.esri.arcgis.geodatabase.IFeatureClass;
import com.esri.arcgis.geodatabase.IFeatureWorkspace;
import com.fjdz.inf.ConnectDataSource;
public class ConnectAccess implements ConnectDataSource {
IFeatureClass featureClass =null;
public IFeatureClass getDataSource(String path, String className) {AccessWorkspaceFactory workspaceFactory;try {workspaceFactory = new AccessWorkspaceFactory();IFeatureWorkspace workspace = (IFeatureWorkspace)workspaceFactory.openFromFile(path, 0);featureClass= workspace.openFeatureClass(className);}catch (IOException e) {e.printStackTrace();}
return featureClass;
}
}
数据读取类：
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import com.esri.arcgis.geodatabase.IFeature;
import com.esri.arcgis.geodatabase.IFeatureClass;
import com.esri.arcgis.geodatabase.IFeatureCursor;
import com.esri.arcgis.geodatabase.IField;
import com.esri.arcgis.geodatabase.IFields;
import com.fjdz.bean.DataBean;
import com.fjdz.enumfactory.FactoryType;
import com.fjdz.inf.ConnectDataSource;
import com.fjdz.inf.IQueryFactory;
public class QueryFactory{IFeatureClass featureClass = null;
ConnectDataSource connectDatasource = null;
public List Query(String type,String path,String className){List datalist = new ArrayList();try{if("shape".equals(type)){
connectDatasource = new ConnectShape();}else if("mdb".equals(type)){
connectDatasource = new ConnectAccess();}featureClass = connectDatasource.getDataSource(path, className);IFeatureCursor cursor = featureClass.search(null, true);IFields fields = cursor.getFields();int fieldCount = fields.getFieldCount();IFeature feature = cursor.nextFeature();while(feature != null){
List value = new ArrayList();
DataBean dataBean = new DataBean();
for (int k = 0; k < fieldCount; k++) {
value.add((feature.getValue(k)).toString());}
dataBean.setList(value);}datalist.add(dataBean);feature = cursor.nextFeature();
} catch (IOException e) {e.printStackTrace();}return datalist;
}
到此ArcGIS数据获取的方法就全部介绍完。
