IDEA Java解析GeoJson.json文件

一、遇到的问题

1. 无法导入成功

2. org.geotools.StyleFactory is not an ImageIO SPI class

解决： https://ask.csdn.net/questions/4105133
调整为jdk1.8就ok了

3. Error parsing epsg:4326 as crs id

换一个geojson示例的crs json串

4. resolution will not be reattempted until the update interval of XXX has elapsed or updates are force

解决： https://blog.csdn.net/u013066244/article/details/91986308

5. Exception java.lang.NoClassDefFoundExcepthon: org.geotools.util.factory.FactoryFinder

解决：所有的maven pom依赖都不能少

二、源码

1. pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.jjxliu.geotools</groupId>
    <artifactId>geojson-demo</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>geojson-demo</name>
    <url>http://maven.apache.org</url>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <geotools.version>17.1</geotools.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.11</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-log4j2</artifactId>
            <version>2.1.9.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <scope>compile</scope>
            <version>1.18.10</version>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.75</version>
        </dependency>
        <dependency>
            <groupId>org.geotools</groupId>
            <artifactId>gt-shapefile</artifactId>
            <version>22.3</version>
        </dependency>
        <dependency>
            <groupId>org.geotools</groupId>
            <artifactId>gt-swing</artifactId>
            <version>${
    
    geotools.version}</version>
        </dependency>
        <!-- for geotools begin -->
        <dependency>
            <groupId>org.geotools</groupId>
            <artifactId>gt-geojson</artifactId>
            <version>24.2</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.geotools/gt-main -->
        <dependency>
            <groupId>org.geotools</groupId>
            <artifactId>gt-main</artifactId>
            <version>${
    
    geotools.version}</version>
        </dependency>
        <dependency>
            <groupId>org.geotools</groupId>
            <artifactId>gt-api</artifactId>
            <version>${
    
    geotools.version}</version>
        </dependency>
        <dependency>
            <groupId>org.geotools</groupId>
            <artifactId>gt-opengis</artifactId>
            <version>${
    
    geotools.version}</version>
        </dependency>
        <dependency>
            <groupId>org.geotools</groupId>
            <artifactId>gt-data</artifactId>
            <version>${
    
    geotools.version}</version>
        </dependency>
        <dependency>
            <groupId>org.geotools</groupId>
            <artifactId>gt-referencing</artifactId>
            <version>${
    
    geotools.version}</version>
        </dependency>
        <dependency>
            <groupId>org.geotools</groupId>
            <artifactId>gt-jdbc</artifactId>
            <version>${
    
    geotools.version}</version>
        </dependency>
        <dependency>
            <groupId>org.geotools.jdbc</groupId>
            <artifactId>gt-jdbc-postgis</artifactId>
            <version>${
    
    geotools.version}</version>
        </dependency>
        <dependency>
            <groupId>org.geotools</groupId>
            <artifactId>gt-epsg-hsql</artifactId>
            <version>${
    
    geotools.version}</version>
        </dependency>
        <!--for geotools end-->
        <dependency>
            <groupId>org.opengeo</groupId>
            <artifactId>geodb</artifactId>
            <version>0.9</version>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>com.bedatadriven</groupId>
            <artifactId>jackson-datatype-jts</artifactId>
            <version>2.4</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.locationtech.jts/jts-core -->
        <dependency>
            <groupId>org.locationtech.jts</groupId>
            <artifactId>jts-core</artifactId>
            <version>1.18.0</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.gdal/gdal -->
        <dependency>
            <groupId>org.gdal</groupId>
            <artifactId>gdal</artifactId>
            <version>3.2.0</version>
            <type>pom</type>
        </dependency>
        <!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-databind -->
        <!-- <dependency>
             <groupId>com.fasterxml.jackson.core</groupId>
             <artifactId>jackson-databind</artifactId>
             <version>2.12.1</version>
         </dependency>-->

        <dependency>
            <groupId>net.sf.json-lib</groupId>
            <artifactId>json-lib</artifactId>
            <version>2.4</version>
            <classifier>jdk15</classifier>
        </dependency>

    </dependencies>
    <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>
                <!--不加如下updatePolicy会报错：resolution will not be reattempted until the update interval of XXX has elapsed or updates are force-->
                <updatePolicy>always</updatePolicy>
            </releases>
        </repository>
        <repository>
            <id>maven2-repository.dev.java.net</id>
            <name>Java.net repository</name>
            <url>http://download.java.net/maven/2</url>
        </repository>
        <repository>
            <snapshots>
                <enabled>true</enabled>
            </snapshots>
            <id>boundless</id>
            <name>Boundless Maven Repository</name>
            <url>http://repo.boundlessgeo.com/main</url>
        </repository>
    </repositories>
    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.1</version>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <version>2.0.4.RELEASE</version>
                <executions>
                    <execution>
                        <goals>
                            <goal>repackage</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>
</project>

2. 源码

package com.test;

import com.test.geojson.FeatureJSON;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.geotools.data.DataUtilities;
import org.geotools.data.collection.ListFeatureCollection;
import org.geotools.data.simple.SimpleFeatureCollection;
import org.geotools.feature.SchemaException;
import org.geotools.feature.simple.SimpleFeatureBuilder;
import org.geotools.geojson.geom.GeometryJSON;
import org.locationtech.jts.geom.GeometryFactory;
import org.locationtech.jts.geom.LineString;
import org.locationtech.jts.geom.Point;
import org.locationtech.jts.io.ParseException;
import org.locationtech.jts.io.WKTReader;
import org.opengis.feature.simple.SimpleFeature;
import org.opengis.feature.simple.SimpleFeatureType;
import org.opengis.referencing.crs.CoordinateReferenceSystem;

import java.io.IOException;
import java.io.StringWriter;
import java.util.ArrayList;
import java.util.List;

/*************************************
 *Class Name: GeoJsonUtil
 *Description: <GeoJsonUtil工具类，重写FeatureJSON>
 *@create: 2021/2/23
 *@since 1.0.0
 *************************************/
@Slf4j
public class GeoJsonUtil {
    
    

    public void lineString2FeatureCollection() throws IOException, SchemaException, ParseException {
    
    
        String[] WKTS = {
    
    "LINESTRING (255351.04293761664 474966.9279243938, 255529.29662365236 474272.4599921228)",
                "LINESTRING (255529.29662365236 474272.4599921228, 256166.05830998957 473979.44920198264)"};

        final SimpleFeatureType TYPE = DataUtilities.createType("Link",
                "geometry:LineString," + // <- the geometry attribute: Point type
                        "gid:String," +   // <- a String attribute
                        "direction:Integer," +   // a number attribute
                        "orientation:Integer"
        );
        SimpleFeatureBuilder featureBuilder = new SimpleFeatureBuilder(TYPE);
        GeometryFactory geometryFactory = new GeometryFactory();
        WKTReader reader = new WKTReader(geometryFactory);
        FeatureJSON fjson = new FeatureJSON();
        List<SimpleFeature> features = new ArrayList<>();
        SimpleFeatureCollection collection = new ListFeatureCollection(TYPE, features);
        for (String wkt : WKTS) {
    
    
            LineString lineString = (LineString) reader.read(wkt);
            featureBuilder.add(lineString);
            featureBuilder.add("123456");
            featureBuilder.add(2);
            featureBuilder.add(1);
            SimpleFeature feature = featureBuilder.buildFeature(null);
            features.add(feature);
        }

        StringWriter writer = new StringWriter();
        fjson.writeFeatureCollection(collection, writer);
        System.out.println(writer.toString());
    }

    public void point2FeatureCollection() throws IOException, SchemaException, ParseException {
    
    
        String[] WKTS = {
    
    "POINT (255351.04293761664 474966.9279243938 1.0)",
                "POINT (255529.29662365236 474272.4599921228 2.0)",
                "POINT (256166.05830998957 473979.44920198264 3.111)"};

        // 坐标顺序是EAST_NORTH，即经度在前
        String json = "{\"type\":\"FeatureCollection\",\"features\":[{\"type\":\"Feature\",\"properties\":{\"area\":3865207830, \"text\": null},\"id\":\"polygon.1\",\"geometry\":{\"type\":\"Polygon\",\"coordinates\":[[[116.19827270507814,39.78321267821705],[116.04446411132814,39.232253141714914],[116.89590454101562,39.3831409542565],[116.86981201171876,39.918162846609455],[116.19827270507814,39.78321267821705]]]}}],\"crs\":{\"type\":\"name\",\"properties\":{\"name\":\"EPSG:4326\"}}}";
        FeatureJSON fjson_15 = new FeatureJSON(new GeometryJSON(15));
        CoordinateReferenceSystem crs = fjson_15.readCRS(json);

        final SimpleFeatureType TYPE = DataUtilities.createType("Point",
                "geometry:Point," + // <- the geometry attribute: Point type
                        "id:String," +   // <- a String attribute
                        "mag:Integer" // <- 权重，叠加次数
        );

        SimpleFeatureBuilder featureBuilder = new SimpleFeatureBuilder(TYPE);
        GeometryFactory geometryFactory = new GeometryFactory();
        WKTReader reader = new WKTReader(geometryFactory);
        FeatureJSON fjson = new FeatureJSON();
        List<SimpleFeature> features = new ArrayList<>();
        SimpleFeatureCollection collection = new ListFeatureCollection(TYPE, features);
        for (String wkt : WKTS) {
    
    
            Point point = (Point) reader.read(wkt);
            featureBuilder.add(point);
            featureBuilder.add("1");
            featureBuilder.add(2);
            SimpleFeature feature = featureBuilder.buildFeature(null);
            features.add(feature);
        }

        StringWriter writer = new StringWriter();
        fjson.setEncodeFeatureCollectionCRS(true);
        fjson.writeFeatureCollection(collection, writer);
        System.out.println(writer.toString());
    }


    public static void main(String[] args) throws ParseException, IOException, SchemaException {
    
    
        GeoJsonUtil geoJsonUtil = new GeoJsonUtil();
        geoJsonUtil.point2FeatureCollection();

        List<String> list1 = new ArrayList<>();
        list1.add("1");
        list1.add("2");
        list1.add("3");
        String deArr[] = list1.toArray(new String[list1.size()]);
        String str = "('" + StringUtils.join(deArr, "','") + "')";
        log.info("str: {}", str);
    }
}

3. geojson示例文件

{
    
    
  "type": "FeatureCollection",
  "features": [
    {
    
    
      "properties": {
    
    
        "version": 0
      },
      "id": "1",
      "type": "Feature",
      "geometry": {
    
    
        "type": "Polygon",
        "coordinates": [
          [
            [
              1868732.467515988,
              6594375.3042187244
            ],
            [
              1868732.467515988,
              5165920.1196253505
            ],
            [
              3297187.6521093622,
              5165920.1196253505
            ],
            [
              3297187.6521093622,
              6594375.3042187244
            ],
            [
              1868732.467515988,
              6594375.3042187244
            ]
          ]
        ]
      }
    }
  ]
}

三、注意

• jdk1.8
• 配置repository updatePolicy
• org.locationtech.jts.geom.GeometryFactory; 与 com.vividsolutions.jts.geom.GeometryFactory; 用哪个包就导入哪个的所有类
• gdal竟然导入成功了，原来之前导不进来是因为没有配置repository；

 <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>
                <!--不加如下updatePolicy会报错：resolution will not be reattempted until the update interval of XXX has elapsed or updates are force-->
                <updatePolicy>always</updatePolicy>
            </releases>
        </repository>
</repositories>

参考

• Maven中GeoTools的引入 - Maven 的 repository 与 mirror
• geojson格式介绍
• https://www.codeleading.com/article/62773085591/
• GeoJson的生成与解析
• Create shapefile based on geojson data with geotools (Java)