springboot 发布wfs服务

Spring Boot是一个快速开发框架，提供了很多现成的解决方案和插件来简化开发流程。如果你想要发布WFS服务，可以考虑使用Spring Boot中的Spring Data REST模块。

Spring Data REST是一个基于Spring Data的模块，可以通过简单的配置来创建RESTful API，并且支持各种数据源，如MongoDB、JPA、Neo4j等。以下是发布WFS服务的大致步骤：

1. 在pom.xml文件中添加Spring Data REST和WFS依赖：

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-rest</artifactId>
</dependency>
<dependency>
    <groupId>org.geotools</groupId>
    <artifactId>gt-wfs-ng</artifactId>
    <version>18.2</version>
</dependency>

2. 创建实体类并添加JPA注解：

@Entity
public class MyEntity {
    @Id
    @GeneratedValue
    private Long id;

    private String name;

    // getters and setters
}

3. 创建Repository接口：

@RepositoryRestResource(collectionResourceRel = "myEntities", path = "myEntities")
public interface MyEntityRepository extends JpaRepository<MyEntity, Long> {
}

4. 创建配置类并添加WFS支持：

@Configuration
public class WfsConfiguration {
    @Autowired
    private EntityManager entityManager;

    @Bean
    public ServletRegistrationBean wfsServlet() {
        ServletRegistrationBean servletRegistrationBean = new ServletRegistrationBean(new WFS(), "/wfs/*");
        servletRegistrationBean.setInitParameter("OwsServiceName", "WFS");
        servletRegistrationBean.setInitParameter("OwsTitle", "My WFS Service");
        servletRegistrationBean.setInitParameter("OwsAbstract", "A simple WFS service");
        servletRegistrationBean.setInitParameter("OwsKeywordList", "WFS, My, Service");
        servletRegistrationBean.setInitParameter("OwsFees", "none");
        servletRegistrationBean.setInitParameter("OwsAccessConstraints", "none");
        servletRegistrationBean.setInitParameter("WfsVersion", "1.0.0");
        servletRegistrationBean.setInitParameter("WfsGetCapabilitiesUrl", "/wfs?request=GetCapabilities");
        servletRegistrationBean.setInitParameter("WfsPostCapabilitiesUrl", "/wfs");
        servletRegistrationBean.setInitParameter("WfsSchemaLocation", "http://schemas.opengis.net/wfs/1.0.0/WFS-capabilities.xsd");
        servletRegistrationBean.setInitParameter("WfsNamespaceUri", "http://www.mycompany.com/wfs");
        servletRegistrationBean.setInitParameter("WfsNamespacePrefix", "my");
        servletRegistrationBean.setInitParameter("WfsGmlVersion", "2.1.2");
        servletRegistrationBean.setInitParameter("WfsMaximumFeatures", "50");
        servletRegistrationBean.setInitParameter("WfsTransactionEnabled", "false");
        servletRegistrationBean.setInitParameter("WfsFeatureTypes", "myEntities");
        servletRegistrationBean.setInitParameter("WfsFeatureTypeNamespaces", "my=http://www.mycompany.com/wfs");
        servletRegistrationBean.setInitParameter("WfsFeatureTypeTitles", "My Entities");
        servletRegistrationBean.setInitParameter("WfsFeatureTypeAbstracts", "A collection of MyEntity objects");
        servletRegistrationBean.setInitParameter("WfsFeatureTypeSchemas", "http://www.mycompany.com/wfs http://www.mycompany.com/wfs/myEntities.xsd");
        servletRegistrationBean.setInitParameter("WfsFeatureTypeCRSs", "EPSG:4326");
        servletRegistrationBean.setInitParameter("WfsFeatureTypeOutputFormats", "GML2");
        servletRegistrationBean.setInitParameter("WfsFeatureTypeDefaultOutputFormat", "GML2");
        servletRegistrationBean.setInitParameter("WfsFeatureTypeExtensions", "");
        servletRegistrationBean.setLoadOnStartup(1);
        return servletRegistrationBean;
    }

    @Bean
    public FeatureTypeInfo myEntitiesFeatureTypeInfo() {
        return new FeatureTypeInfoBuilder()
                .setName("myEntities")
                .setNamespaceURI("http://www.mycompany.com/wfs")
                .setNamespacePrefix("my")
                .setTitle("My Entities")
                .setDescription("A collection of MyEntity objects")
                .setSRSs(Collections.singletonList(DefaultCRSCodes.WGS84_2D))
                .setOutputFormats(Collections.singletonList(GML2))
                .setDefaultOutputFormat(GML2)
                .build();
    }

    @Bean
    public DataStore myEntitiesDataStore() throws IOException {
        File dataDir = new File("/path/to/data/dir");
        Map<String, Object> params = new HashMap<>();
        params.put(PostgisNGDataStoreFactory.DBTYPE.key, PostgisNGDataStoreFactory.DBTYPE.sample);
        params.put(PostgisNGDataStoreFactory.HOST.key, "localhost");
        params.put(PostgisNGDataStoreFactory.PORT.key, 5432);
        params.put(PostgisNGDataStoreFactory.SCHEMA.key, "public");
        params.put(PostgisNGDataStoreFactory.DATABASE.key, "mydb");
        params.put(PostgisNGDataStoreFactory.USER.key, "myuser");
        params.put(PostgisNGDataStoreFactory.PASSWD.key, "mypassword");
        params.put(PostgisNGDataStoreFactory.PREPARED_STATEMENTS.key, true);
        params.put(PostgisNGDataStoreFactory.LOOSEBBOX.key, true);
        params.put(PostgisNGDataStoreFactory.VALIDATECONN.key, true);
        params.put(PostgisNGDataStoreFactory.FETCHSIZE.key, 1000);
        return new PostGISNGDataStoreFactory().createDataStore(params);
    }

    @Bean
    public FeatureTypeFactory myEntitiesFeatureTypeFactory() {
        return new FeatureTypeFactoryImpl();
    }

    @Bean
    public FeatureSource myEntitiesFeatureSource() throws IOException {
        return myEntitiesDataStore().getFeatureSource("myEntities");
    }

    @Bean
    public SimpleFeatureType myEntitiesSimpleFeatureType() throws IOException {
        return myEntitiesFeatureSource().getSchema();
    }

    @Bean
    public FeatureTypeStyle myEntitiesFeatureTypeStyle() {
        return SLD.createPolygonStyle(Color.BLUE, Color.WHITE, 1.0f);
    }

    @Bean
    public WFSFeatureSource myEntitiesWFSFeatureSource() throws IOException {
        return new WFSFeatureSource(
                myEntitiesSimpleFeatureType(),
                myEntitiesFeatureSource(),
                Collections.singletonList(myEntitiesFeatureTypeStyle()),
                myEntitiesFeatureTypeInfo(),
                entityManager);
    }
}

5. 启动Spring Boot应用并访问URL：http://localhost:8080/wfs?request=GetCapabilities，即可获取WFS服务的元数据信息。