shape文件的操作
一、maven依赖引入
<dependency>
<groupId>org.geotools</groupId>
<artifactId>gt-api</artifactId>
<exclusions>
<exclusion>
<groupId>commons-pool</groupId>
<artifactId>commons-pool</artifactId>
</exclusion>
<exclusion>
<groupId>jgridshift</groupId>
<artifactId>jgridshift</artifactId>
</exclusion>
<exclusion>
<groupId>Javax.media</groupId>
<artifactId>jai_core</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>commons-pool</groupId>
<artifactId>commons-pool</artifactId>
</dependency>
<dependency>
<groupId>jgridshift</groupId>
<artifactId>jgridshift</artifactId>
</dependency>
<dependency>
<groupId>Javax.media</groupId>
<artifactId>jai_core</artifactId>
</dependency>
<dependency>
<groupId>org.geotools</groupId>
<artifactId>gt-geojson</artifactId>
</dependency>
<dependency>
<groupId>org.geotools</groupId>
<artifactId>gt-epsg-hsql</artifactId>
<exclusions>
<exclusion>
<groupId>org.hsqldb</groupId>
<artifactId>hsqldb</artifactId>
</exclusion>
</exclusions>
</dependency>
<!-- https://mvnrepository.com/artifact/org.hsqldb/hsqldb -->
<dependency>
<groupId>org.hsqldb</groupId>
<artifactId>hsqldb</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.geotools</groupId>
<artifactId>gt-shapefile</artifactId>
</dependency>
<dependency>
<groupId>com.googlecode.json-simple</groupId>
<artifactId>json-simple</artifactId>
</dependency>
备注：需要配置下载org.geotools的私有仓库
<repositories>
<repository>
<id>osgeo</id>
<name>OSGeo Release Repository</name>
<url>https://repo.osgeo.org/repository/release/</url>
<snapshots><enabled>false</enabled></snapshots>
<releases><enabled>true</enabled></releases>
</repository>
</repositories>
二、读取shape文件，并转换为对象T
public static List<T>readShape(URL url) throws IOException {
ShapefileDataStore store = new ShapefileDataStore(url);
//设置编码
Charset charset = Charset.forName("GBK");
store.setCharset(charset);
SimpleFeatureSource sfSource = store.getFeatureSource();
SimpleFeatureIterator sfIter = sfSource.getFeatures().features();
// 从ShapeFile文件中遍历每一个Feature，然后将Feature转为GeoJSON字符串
List<T> list = new ArrayList<>();
while (sfIter.hasNext()) {
SimpleFeature feature = sfIter.next();
// Feature转GeoJSON
FeatureJSON fjson = new FeatureJSON();
StringWriter writer = new StringWriter();
fjson.writeFeature(feature, writer);
JSONObject jsonObject = new JSONObject(writer.toString());
String type = jsonObject.getStr("type").toLowerCase();
if (type.equals("multipolygon")){
LOGGER.error("该数据不是图斑：【{}】",writer);
continue;
}
String properties = jsonObject.remove("properties").toString();
jsonObject.remove("id");
//其他属性
T t = JSONUtil.toBean(properties, T.class);
if (JudgeUtil.isDBNull(t.getObjectid())){
LOGGER.error("该图斑每页objectid：【{}】",writer.toString());
continue;
}
//geojson
t.setGeojson(jsonObject.toString());
list.add(gisWarnQrstbhhx);
}
return list;
}
三、shape文件写入
1、写入shape文件入口
/**
* 写shape文件
* @param rootFile
* @param shapeName shape文件名 包含后缀名.shp
* @param list
*/
public static void writeShape(File rootFile,String shapeName,List<T>list) throws IOException {
if (JudgeUtil.isEmpty(list)){
throw new WrongDataException("数据不能为空");
}
String type = new JSONObject(list.get(0).getGeojson()).getStr("type").toLowerCase();
//将list转换为geoJson字符串
String geoJson = getGsoJson(list);
if (!rootFile.exists() || rootFile.isFile()){
rootFile.mkdirs();
}
File file = new File(rootFile,shapeName);
Map<String, Serializable> params = new HashMap<>();
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.setDefaultGeometry("the_geom");
//添加属性
addProperties(type,tb);
ds.createSchema(tb.buildFeatureType());
//设置编码
Charset charset = Charset.forName("GBK");
ds.setCharset(charset);
FeatureJSON featureJson = new FeatureJSON();
SimpleFeatureCollection featureCollection = (SimpleFeatureCollection) featureJson.readFeatureCollection(geoJson);
FeatureIterator<SimpleFeature> iterator = featureCollection.features();
//设置Writer
FeatureWriter<SimpleFeatureType, SimpleFeature> writer = ds.getFeatureWriter(ds.getTypeNames()[0], Transaction.AUTO_COMMIT);
//写下一条
SimpleFeature srcFeature;
Iterator<Property> properties;
while (iterator.hasNext()){
srcFeature = iterator.next();
properties = srcFeature.getProperties().iterator();
SimpleFeature destFeature = writer.next();
while (properties.hasNext()){
Name name = properties.next().getName();
Object attribute = srcFeature.getAttribute(name);
if (!(attribute instanceof Geometry)){
destFeature.setAttribute(name, attribute);
}
}
destFeature.setDefaultGeometryProperty(srcFeature.getDefaultGeometryProperty());
}
writer.write();
writer.close();
ds.dispose();
}
2、将List<T>转换为geojson
/**
* T转geojson
* @param list
* @return
*/
private static String getGsoJson(List<T>list){
JSONObject jsonObject = new JSONObject();
jsonObject.putOnce("type","FeatureCollection");
JSONArray jsonArray = new JSONArray();
jsonObject.putOnce("features",jsonArray);
for (T t : list) {
JSONObject feature = new JSONObject();
feature.putOnce("type","Feature");
feature.putOnce("geometry",new JSONObject(t.getGeojson()));
t.setGeojson(null);
t.setGeom(null);
t.setGid(null);
feature.putOnce("properties",JSONUtil.parseObj(t));
jsonArray.add(feature);
}
return jsonObject.toString();
}
3、通过反射 添加properties
/**
* 通过反射 添加properties
* @param tb
*/
private static void addProperties(String type, SimpleFeatureTypeBuilder tb){
Field[] declaredFields = T.class.getDeclaredFields();
setType(tb,type.toLowerCase());
for (Field declaredField : declaredFields) {
String name = declaredField.getName();
if (!name.equals("serialVersionUID") && !name.equals("geojson") && !name.equals("geom")){
tb.add(name,declaredField.getType());
}
}
}
4、设置类型
private static void setType(SimpleFeatureTypeBuilder tb,String type){
if (type.equals("point")) {
tb.add("the_geom", Point.class);
} else if (type.equals("line")) {
tb.add("the_geom", LineString.class);
} else if (type.equals("polygon")) {
tb.add("the_geom", Polygon.class);
} else if (type.equals("multipoint")) {
tb.add("the_geom", MultiPoint.class);
} else if (type.equals("multiline")) {
tb.add("the_geom", MultiLineString.class);
} else if (type.equals("multipolygon")) {
tb.add("the_geom", MultiPolygon.class);
}
}
