geotools系列1-读取shp文件

.shp文件是目前大家使用频率较高而且通用的一种格式。此篇主要说明geotools对shp文件的读取说明。

1、maven依赖，包含了postgis支持、epsg、和swing的支持，后续的文章基本都基于此

<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>geotools_t1</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <packaging>jar</packaging>

  <name>geotools_t1</name>
  <url>http://maven.apache.org</url>

  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     <geotools.version>20-SNAPSHOT</geotools.version>
  </properties>
<dependencies>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.11</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>
        <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>
 		
    </dependencies>
     <repositories>
        <repository>
            <id>maven2-repository.dev.java.net</id>
            <name>Java.net repository</name>
            <url>http://download.java.net/maven/2</url>
        </repository>
        <repository>
            <id>osgeo</id>
            <name>Open Source Geospatial Foundation Repository</name>
            <url>http://download.osgeo.org/webdav/geotools/</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>
                <inherited>true</inherited>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

2、直接上java代码说明shp文件读取

public static SimpleFeatureCollection  readShp(String path ){
		return readShp(path, null);
		
	}

	public static SimpleFeatureCollection  readShp(String path , Filter filter){
	  
		SimpleFeatureSource  featureSource = readStoreByShp(path);
		   
		if(featureSource == null) return null;
          
		try {
			return filter != null ? featureSource.getFeatures(filter) : featureSource.getFeatures() ;
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} 
         
         return null ;
	}
	
	public static  SimpleFeatureSource readStoreByShp(String path ){
		 
		File file = new File(path);
    	 
		FileDataStore store;
		SimpleFeatureSource featureSource = null;
		try {
			store = FileDataStoreFinder.getDataStore(file);
			 ((ShapefileDataStore) store).setCharset(Charset.forName("UTF-8"));
			featureSource = store.getFeatureSource();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
         
         return featureSource ;
	}

3、测试一段读取的代码，打印所有读取到的simplefeature

String path1 = "G:/work/china_map/shp/BOUNT_poly.shp" ;
		
		//读取shp
		SimpleFeatureCollection  colls1 = readShp(path1);
		//拿到所有features
		SimpleFeatureIterator iters = colls1.features();
		//遍历打印
		while(iters.hasNext()){
			SimpleFeature sf = iters.next();
			
			System.out.println(sf.getID() + " , " + sf.getAttributes());
			
		}

打印贴图

 

实例的.java在附件。