使用GeoTools 调用WFS服务（Java）

/**
- Title: TestBufferAnalysis.java
- Description:
- Copyright: Copyright (c) 2020
*/
package com.shuidao01.test.geotools;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import org.geotools.data.DataStore;
import org.geotools.data.DataStoreFinder;
import org.geotools.data.FeatureSource;
import org.geotools.data.Query;
import org.geotools.factory.CommonFactoryFinder;
import org.geotools.feature.FeatureCollection;
import org.geotools.feature.FeatureIterator;
import org.geotools.util.factory.GeoTools;
import org.locationtech.jts.geom.Coordinate;
import org.locationtech.jts.geom.GeometryFactory;
import org.locationtech.jts.geom.Point;
import org.opengis.feature.simple.SimpleFeature;
import org.opengis.feature.simple.SimpleFeatureType;
import org.opengis.filter.FilterFactory2;
import org.opengis.filter.spatial.DWithin;
/**
- 空间分析测试（JKD1.8；GeoServer 2.15.2；Mavan配置，见备注。）
- @author shuidao01
- @date 2020年5月21日下午6:40:50
- @version 1.0
*/
public class TestBufferAnalysis2 {
```
 //WFS服务查询地址
```

  private static final String GET_CAPABILITIES = "http://localhost:8080/geoserver/wfs?service=WFS&version=1.0.0&request=GetCapabilities";

```
  /**
```
```
   * 点周边查询
```
```
   * @return
```
```
   */
```
```
  public static void getBufferGeo(){
```

	    Map<String , String> connectionParameters = new HashMap<String , String>();

	    connectionParameters.put("WFSDataStoreFactory:GET_CAPABILITIES_URL", GET_CAPABILITIES);

	    FeatureCollection<SimpleFeatureType, SimpleFeature>  features = null;

```
		try {
```
```
	  		//创建连接
```

	  		DataStore data = DataStoreFinder.getDataStore( connectionParameters );

```
	  		//获取所有的图层
```

	  		String typeNames[] = data.getTypeNames();

	  		//指定要查询的图层（根据自己情况修改）

```
	  		String typeName = typeNames[12];
```

	  		SimpleFeatureType schema = data.getSchema( typeName );

			FeatureSource<SimpleFeatureType, SimpleFeature> source = data.getFeatureSource( typeName );

```
			//执行查询
```

			String geomName = schema.getGeometryDescriptor().getLocalName();

			FilterFactory2 filterFactory = CommonFactoryFinder.getFilterFactory2( GeoTools.getDefaultHints());

			GeometryFactory gf = new GeometryFactory();

```
		    //缓冲查询标记的点位
```

			Point ls = gf.createPoint(new Coordinate(119.9436 , 31.8056));

```
			//缓冲区查询( 1km 为1*0.01 )
```

			DWithin filter = filterFactory.dwithin(filterFactory.property( geomName ), filterFactory.literal(ls), 0.05, 	"km");

```
			//输出全部字段
```

			Query query = new Query(typeName, filter);

			features = source.getFeatures( query );

```
			//查询结果集
```

			FeatureIterator `<SimpleFeature>` featureIterator =  features.features();

			System.out.println("==========数据条数："+features.size());

```
			while( featureIterator.hasNext() ){
```

		    	SimpleFeature  feature =  featureIterator.next();

    	        System.out.println("==========输出结果："+feature.getProperties());

```
		    }
```
```
		} catch (IOException e) {
```
```
			// TODO Auto-generated catch block
```
```
			e.printStackTrace();
```
```
		}finally {
```
```
			if(features!=null) {
```
```
				features.features().close();
```
```
			}
```
```
		}
```
```
  }
```

  public static void main(String[] args) throws Exception {

```
	 getBufferGeo();
```
```
}
```
}

备注： <geotools.version>23-SNAPSHOT</geotools.version>

    <dependency>
	    <groupId>org.geotools.ogc</groupId>
	    <artifactId>net.opengis.wfs</artifactId>
	    <version>${geotools.version}</version>
	</dependency>
	<dependency>
	   <groupId>org.geotools</groupId>
	   <artifactId>gt-wfs-ng</artifactId>
	   <version>${geotools.version}</version>
	 </dependency>
    <dependency>
	   <groupId>org.geotools.xsd</groupId>
	   <artifactId>gt-xsd-wfs</artifactId>
	   <version>${geotools.version}</version>
	</dependency>
	<dependency>
        <groupId>org.geotools</groupId>
        <artifactId>gt-epsg-hsql</artifactId>
        <version>${geotools.version}</version>             
    </dependency>
    <dependency>
        <groupId>org.geotools</groupId>
        <artifactId>gt-referencing</artifactId>
        <version>${geotools.version}</version>
    </dependency>    
    <!--geotools使用  end-->

来源：oschina

链接：https://my.oschina.net/zhxwang/blog/4301267

标签

GeoServer

java

geotools

Spatial