Snake8859

快速入门

2/3/2023

# Maven项目创建

首先利用IDEA创建一个Maven项目。

  1. 从菜单中选择File -> New Project。在新建项目对话框中选择Maven项目，确保选择了Create from prototype，并选择org.apache.maven:maven-archetype-quickstart原型。按下一个。

    img

  2. 填写GAV信息，例如

    • GroupId: org.geotools
    • ArtifactId: tutorial
    • Version: 1.0-SNAPSHOT

    ../../_images/new_project2.png

  3. 配置maven文件和依赖仓库

    ../../_images/new_project3.png

  4. 确认基本信息，创建Maven项目。

    ../../_images/new_project4.png

# GeoTools依赖导入

接下来在pom.xml中导入GeoTools的依赖。

  1. 在属性标签内添加变量，定义了geotools的版本以及相关字符编码。

    <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <geotools.version>29-SNAPSHOT</geotools.version>
    <maven.deploy.skip>true</maven.deploy.skip>
</properties>
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  2. 添加GeoTools的gt-main和gt-swing的jar包依赖，版本由属性中的geotools.version所决定。

      <dependencies>
    <dependency>
      <groupId>org.geotools</groupId>
      <artifactId>gt-shapefile</artifactId>
      <version>${geotools.version}</version>
    </dependency>
    <dependency>
      <groupId>org.geotools</groupId>
      <artifactId>gt-swing</artifactId>
      <version>${geotools.version}</version>
    </dependency>
  </dependencies>
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  3. 指定GeoTools的jar包的仓库地址，也可以在maven的setting.xml中指定镜像。

    <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>
    <repository>
        <id>osgeo-snapshot</id>
        <name>OSGeo Snapshot Repository</name>
        <url>https://repo.osgeo.org/repository/snapshot/</url>
        <snapshots><enabled>true</enabled></snapshots>
        <releases><enabled>false</enabled></releases>
    </repository>
</repositories>
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  4. GeoTools需要Java11，因此需要告诉Maven使用11的编译。

    <build>
    <plugins>
        <plugin>
            <inherited>true</inherited>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
            <version>3.10.1</version>
            <configuration>
                <source>1.8</source>
                <target>1.8</target>
            </configuration>
        </plugin>
    </plugins>
</build>
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    项目需要使用11的JDK。

  5. 完整的pom.xml如下。

    <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>org.geotools.tutorial</groupId>
  <artifactId>quickstart</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <packaging>jar</packaging>
  <name>GeoTools Quickstart</name>
  <url>http://maven.apache.org</url>
  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <geotools.version>29-SNAPSHOT</geotools.version>
    <maven.deploy.skip>true</maven.deploy.skip>
  </properties>
  <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.13.2</version>
      <scope>test</scope>
    </dependency>
    <dependency>
      <groupId>org.geotools</groupId>
      <artifactId>gt-shapefile</artifactId>
      <version>${geotools.version}</version>
    </dependency>
    <dependency>
      <groupId>org.geotools</groupId>
      <artifactId>gt-swing</artifactId>
      <version>${geotools.version}</version>
    </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></releases>
    </repository>
    <repository>
    <id>osgeo-snapshot</id>
    <name>OSGeo Snapshot Repository</name>
    <url>https://repo.osgeo.org/repository/snapshot/</url>
    <snapshots><enabled>true</enabled></snapshots>
    <releases><enabled>false</enabled></releases>
    </repository>
  </repositories>
  <build>
    <plugins>
      <plugin>
        <inherited>true</inherited>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-compiler-plugin</artifactId>
        <version>3.10.1</version>
        <configuration>
          <source>1.8</source>
          <target>1.8</target>
        </configuration>
      </plugin>
    </plugins>
  </build>
</project>
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# Quickstart Application

在上述环境配置成功后，我们可以创建一个简单的快速入门应用，在屏幕上显示一个shapefile。

  1. 创建一个名为QuickStart的Java类

    ../../_images/new_class_menu.png

    ../../_images/new_class_dialog.png

  2. 在该类中填入以下代码

    /*
 *    GeoTools Sample code and Tutorials by Open Source Geospatial Foundation, and others
 *    https://docs.geotools.org
 *
 *    To the extent possible under law, the author(s) have dedicated all copyright
 *    and related and neighboring rights to this software to the public domain worldwide.
 *    This software is distributed without any warranty.
 * 
 *    You should have received a copy of the CC0 Public Domain Dedication along with this
 *    software. If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
 */
 package org.geotools.tutorial.quickstart;

import java.io.File;
import java.util.logging.Logger;

import org.geotools.data.FileDataStore;
import org.geotools.data.FileDataStoreFinder;
import org.geotools.data.simple.SimpleFeatureSource;
import org.geotools.map.FeatureLayer;
import org.geotools.map.Layer;
import org.geotools.map.MapContent;
import org.geotools.styling.SLD;
import org.geotools.styling.Style;
import org.geotools.swing.JMapFrame;
import org.geotools.swing.data.JFileDataStoreChooser;

/**
 * Prompts the user for a shapefile and displays the contents on the screen in a map frame.
 *
 * <p>This is the GeoTools Quickstart application used in documentationa and tutorials. *
 */
public class Quickstart {

    private static final Logger LOGGER = org.geotools.util.logging.Logging.getLogger(Quickstart.class);
    /**
     * GeoTools Quickstart demo application. Prompts the user for a shapefile and displays its
     * contents on the screen in a map frame
     */
    public static void main(String[] args) throws Exception {
        // display a data store file chooser dialog for shapefiles
        LOGGER.info( "Quickstart");
        LOGGER.config( "Welcome Developers");
        LOGGER.info("java.util.logging.config.file="+System.getProperty("java.util.logging.config.file"));
        File file = JFileDataStoreChooser.showOpenFile("shp", null);
        if (file == null) {
            return;
        }
        LOGGER.config("File selected "+file);

        FileDataStore store = FileDataStoreFinder.getDataStore(file);
        SimpleFeatureSource featureSource = store.getFeatureSource();

        // Create a map content and add our shapefile to it
        MapContent map = new MapContent();
        map.setTitle("Quickstart");

        Style style = SLD.createSimpleStyle(featureSource.getSchema());
        Layer layer = new FeatureLayer(featureSource, style);
        map.addLayer(layer);

        // Now display the map
        JMapFrame.showMap(map);
    }
}
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  3. 启动Main函数，弹出一个文件选择器，然后加载一个shapefile文件。

    ../../_images/QuickstartOpen.png

  4. 程序将会打开shapefile，在窗口内显示一个shapefile。

    ../../_images/QuickstartMap.png

# 参考

  • 官方：https://docs.geotools.org/latest/userguide/tutorial/quickstart/intellij.html
  • geotools学习（一）IntelliJ快速入门：https://www.jianshu.com/p/b18cbee5af21
Last Updated: 8/6/2023, 3:51:38 PM