JAVA用geotools读写shape格式文件 (对应geotools版本:2.7.2)
(后面添加对应geotools 10.0版本的写法)
读shape文件。
shape格式文件最少包含3个文件,他们的后缀是:.shp, .dbf, .shx。
.shp存储地理形状和位置信息,.dbf存储属性信息,.shx是索引文件。
单独读取DBF文件
public void readDBF(String path) {
DbaseFileReader reader = null; try { reader = new DbaseFileReader(new ShpFiles(path), false, Charset.forName("GBK")); DbaseFileHeader header = reader.getHeader(); int numFields = header.getNumFields(); //迭代读取记录 while (reader.hasNext()) { try { Object[] entry = reader.readEntry(); for (int i=0; i<numFields; i++) { String title = header.getFieldName(i); Object value = entry[i]; System.out.println(title+"="+value); } } catch (Exception e) { e.printStackTrace(); } } } catch (Exception e) { e.printStackTrace(); } finally { if (reader != null) { //关闭 try {reader.close();} catch (Exception e) {} } } }
读取3个文件,以point为例:
public void readSHP(String path) {
ShapefileDataStore shpDataStore = null; try{ shpDataStore = new ShapefileDataStore(new File(path).toURI().toURL()); shpDataStore.setStringCharset(Charset.forName("GBK")); String typeName = shpDataStore.getTypeNames()[0]; FeatureSource<SimpleFeatureType, SimpleFeature> featureSource = null; featureSource = (FeatureSource<SimpleFeatureType, SimpleFeature>)shpDataStore.getFeatureSource(typeName); FeatureCollection<SimpleFeatureType, SimpleFeature> result = featureSource.getFeatures(); System.out.println(result.size()); FeatureIterator<SimpleFeature> itertor = result.features(); while(itertor.hasNext()){ SimpleFeature feature = itertor.next(); Collection<Property> p = feature.getProperties(); Iterator<Property> it = p.iterator(); while(it.hasNext()) { Property pro = it.next(); if (pro.getValue() instanceof Point) { System.out.println("PointX = " + ((Point)(pro.getValue())).getX()); System.out.println("PointY = " + ((Point)(pro.getValue())).getY()); } else { System.out.println(pro.getName() + " = " + pro.getValue()); } } } itertor.close(); } catch (MalformedURLException e) { e.printStackTrace(); } catch(IOException e) { e.printStackTrace(); } }
写shape文件,以point为例:
public static void main(String[] args) { try{ //定义属性 final SimpleFeatureType TYPE = DataUtilities.createType("Location", "location:Point," + // <- the geometry attribute: Point type "POIID:String," + // <- a String attribute "MESHID:String," + // a number attribute "OWNER:String" ); SimpleFeatureCollection collection = FeatureCollections.newCollection(); GeometryFactory geometryFactory = new GeometryFactory(); SimpleFeatureBuilder featureBuilder = new SimpleFeatureBuilder(TYPE); double latitude = Double.parseDouble("116.123456789"); double longitude = Double.parseDouble("39.120001"); String POIID = "2050003092"; String MESHID = "0"; String OWNER = "340881"; /* Longitude (= x coord) first ! */ Point point = geometryFactory.createPoint(new Coordinate(longitude, latitude)); Object[] obj = {point, POIID, MESHID, OWNER}; SimpleFeature feature = featureBuilder.buildFeature(null, obj); collection.add(feature); feature = featureBuilder.buildFeature(null, obj); collection.add(feature); File newFile = new File("D:/newPoi.shp"); ShapefileDataStoreFactory dataStoreFactory = new ShapefileDataStoreFactory(); Map<String, Serializable> params = new HashMap<String, Serializable>(); params.put("url", newFile.toURI().toURL()); params.put("create spatial index", Boolean.TRUE); ShapefileDataStore newDataStore = (ShapefileDataStore) dataStoreFactory.createNewDataStore(params); newDataStore.createSchema(TYPE); newDataStore.forceSchemaCRS(DefaultGeographicCRS.WGS84); Transaction transaction = new DefaultTransaction("create"); String typeName = newDataStore.getTypeNames()[0]; SimpleFeatureSource featureSource = newDataStore.getFeatureSource(typeName); if (featureSource instanceof SimpleFeatureStore) { SimpleFeatureStore featureStore = (SimpleFeatureStore) featureSource; featureStore.setTransaction(transaction); try { featureStore.addFeatures(collection); transaction.commit(); } catch (Exception problem) { problem.printStackTrace(); transaction.rollback(); } finally { transaction.close(); } } else { System.out.println(typeName + " does not support read/write access"); } } catch (Exception e) { e.printStackTrace(); } }
以下代码对应geotools10.0版本
一、读shp文件(图形信息+属性信息)的写法:
import java.io.File; import java.nio.charset.Charset; import java.util.Iterator; import org.geotools.data.shapefile.ShapefileDataStore; import org.geotools.data.shapefile.ShapefileDataStoreFactory; import org.geotools.data.simple.SimpleFeatureIterator; import org.geotools.data.simple.SimpleFeatureSource; import org.opengis.feature.Property; import org.opengis.feature.simple.SimpleFeature; public class ShpNew { public static void main(String[] args) { ShapefileDataStoreFactory dataStoreFactory = new ShapefileDataStoreFactory(); try { ShapefileDataStore sds = (ShapefileDataStore)dataStoreFactory.createDataStore(new File("D:\\work\\shpdir\\Poi.shp").toURI().toURL()); sds.setCharset(Charset.forName("GBK")); SimpleFeatureSource featureSource = sds.getFeatureSource(); SimpleFeatureIterator itertor = featureSource.getFeatures().features(); while(itertor.hasNext()) { SimpleFeature feature = itertor.next(); Iterator<Property> it = feature.getProperties().iterator(); while(it.hasNext()) { Property pro = it.next(); System.out.println(pro); } } itertor.close(); } catch (Exception e) { e.printStackTrace(); } } }
二、读图形信息
try { ShpFiles sf = new ShpFiles("D:\\Poi.shp"); ShapefileReader r = new ShapefileReader( sf, false, false, new GeometryFactory() ); while (r.hasNext()) { Geometry shape = (Geometry) r.nextRecord().shape(); //com.vividsolutions.jts.geom.Geometry; System.out.println(shape.toString()); } r.close(); } catch (Exception e) { e.printStackTrace(); }
三、读dbf文件
public void readDBF() { try { FileChannel in = new FileInputStream("D:\\Poi.dbf").getChannel(); DbaseFileReader dbfReader = new DbaseFileReader(in, false, Charset.forName("GBK")); DbaseFileHeader header = dbfReader.getHeader(); int fields = header.getNumFields(); while ( dbfReader.hasNext() ){ DbaseFileReader.Row row = dbfReader.readRow(); // System.out.println(row.toString()); for (int i=0; i<fields; i++) { System.out.println(header.getFieldName(i) + " : " + row.read(i)); } } dbfReader.close(); in.close(); } catch (Exception e) { e.printStackTrace(); } }
四、写shape文件
public void write(String filepath) { try { //创建shape文件对象 File file = new File(filepath); Map<String, Serializable> params = new HashMap<String, Serializable>(); params.put( ShapefileDataStoreFactory.URLP.key, file.toURI().toURL() ); ShapefileDataStore ds = (ShapefileDataStore) new ShapefileDataStoreFactory().createNewDataStore(params); //定义图形信息和属性信息 SimpleFeatureTypeBuilder tb = new SimpleFeatureTypeBuilder(); tb.setCRS(DefaultGeographicCRS.WGS84); tb.setName("shapefile"); tb.add("the_geom", Point.class); tb.add("POIID", Long.class); tb.add("NAMEC", String.class); ds.createSchema(tb.buildFeatureType()); ds.setCharset(Charset.forName("GBK")); //设置Writer FeatureWriter<SimpleFeatureType, SimpleFeature> writer = ds.getFeatureWriter(ds.getTypeNames()[0], Transaction.AUTO_COMMIT); //写下一条 SimpleFeature feature = writer.next(); feature.setAttribute("the_geom", new GeometryFactory().createPoint(new Coordinate(116.123, 39.345))); feature.setAttribute("POIID", 1234567890l); feature.setAttribute("NAMEC", "某兴趣点1"); feature = writer.next(); feature.setAttribute("the_geom", new GeometryFactory().createPoint(new Coordinate(116.456, 39.678))); feature.setAttribute("POIID", 1234567891l); feature.setAttribute("NAMEC", "某兴趣点2"); writer.write(); writer.close(); ds.dispose(); //读取刚写完shape文件的图形信息 ShpFiles shpFiles = new ShpFiles(filepath); ShapefileReader reader = new ShapefileReader(shpFiles, false, true, new GeometryFactory(), false); try { while (reader.hasNext()) { System.out.println(reader.nextRecord().shape()); } } finally { reader.close(); } } catch (Exception e) { } }
五、由源shape文件创建新的shape文件
public void transShape(String srcfilepath, String destfilepath) { try { //源shape文件 ShapefileDataStore shapeDS = (ShapefileDataStore) new ShapefileDataStoreFactory().createDataStore(new File(srcfilepath).toURI().toURL()); //创建目标shape文件对象 Map<String, Serializable> params = new HashMap<String, Serializable>(); FileDataStoreFactorySpi factory = new ShapefileDataStoreFactory(); params.put(ShapefileDataStoreFactory.URLP.key, new File(destfilepath).toURI().toURL()); ShapefileDataStore ds = (ShapefileDataStore) factory.createNewDataStore(params); // 设置属性 SimpleFeatureSource fs = shapeDS.getFeatureSource(shapeDS.getTypeNames()[0]); //下面这行还有其他写法,根据源shape文件的simpleFeatureType可以不用retype,而直接用fs.getSchema设置 ds.createSchema(SimpleFeatureTypeBuilder.retype(fs.getSchema(), DefaultGeographicCRS.WGS84)); //设置writer FeatureWriter<SimpleFeatureType, SimpleFeature> writer = ds.getFeatureWriter(ds.getTypeNames()[0], Transaction.AUTO_COMMIT); //写记录 SimpleFeatureIterator it = fs.getFeatures().features(); try { while (it.hasNext()) { SimpleFeature f = it.next(); SimpleFeature fNew = writer.next(); fNew.setAttributes(f.getAttributes()); writer.write(); } } finally { it.close(); } writer.close(); ds.dispose(); shapeDS.dispose(); } catch (Exception e) { e.printStackTrace(); } }
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