将 ESRI shapefile 输入到 java

Question

我是 geotools 的新手，我的 Java 知识很生疏。我正在尝试将许多 shapefile 输入到 java 中，以便我可以计算其中所有多边形的面积并将单独的属性添加到相应的 shapefile。我尝试使用链接中给出的代码 Does anyone know of a library in Java that can parse ESRI Shapefiles? 。 但是我会抛出异常

Oct 21, 2016 12:39:08 PM org.geotools.factory.FactoryRegistry scanForPlugins
WARNING: Can't load a service for category "DataStoreFactorySpi". Cause is "ServiceConfigurationError: org.geotools.data.DataStoreFactorySpi: Provider org.geotools.data.shapefile.ShapefileDataStoreFactory could not be instantiated".
java.util.ServiceConfigurationError: org.geotools.data.DataStoreFactorySpi: Provider org.geotools.data.shapefile.ShapefileDataStoreFactory could not be instantiated
at java.util.ServiceLoader.fail(ServiceLoader.java:232)
at java.util.ServiceLoader.access$100(ServiceLoader.java:185)
at java.util.ServiceLoader$LazyIterator.nextService(ServiceLoader.java:384)
at java.util.ServiceLoader$LazyIterator.next(ServiceLoader.java:404)
at java.util.ServiceLoader$1.next(ServiceLoader.java:480)
at org.geotools.factory.FactoryRegistry.register(FactoryRegistry.java:826)
at org.geotools.factory.FactoryRegistry.scanForPlugins(FactoryRegistry.java:772)
at org.geotools.factory.FactoryRegistry.scanForPluginsIfNeeded(FactoryRegistry.java:805)
at org.geotools.factory.FactoryRegistry.getServiceProviders(FactoryRegistry.java:196)
at org.geotools.data.DataAccessFinder.getAvailableDataStores(DataAccessFinder.java:207)
at org.geotools.data.DataStoreFinder.getAvailableDataStores(DataStoreFinder.java:116)
at org.geotools.data.DataStoreFinder.getDataStore(DataStoreFinder.java:87)
at shapefile.ReadFile.main(ReadFile.java:24)
Caused by: java.lang.NoClassDefFoundError: org/geotools/data/directory/FileStoreFactory
at java.lang.Class.getDeclaredConstructors0(Native Method)
at java.lang.Class.privateGetDeclaredConstructors(Class.java:2671)
at java.lang.Class.getConstructor0(Class.java:3075)
at java.lang.Class.newInstance(Class.java:412)
at java.util.ServiceLoader$LazyIterator.nextService(ServiceLoader.java:380)
... 10 more
Caused by: java.lang.ClassNotFoundException: org.geotools.data.directory.FileStoreFactory
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 15 more

Oct 21, 2016 12:39:08 PM org.geotools.factory.FactoryRegistry scanForPlugins
WARNING: Can't load a service for category "DataStoreFactorySpi". Cause is "ServiceConfigurationError: org.geotools.data.DataStoreFactorySpi: Provider org.geotools.data.shapefile.ShapefileDirectoryFactory could not be instantiated".
java.util.ServiceConfigurationError: org.geotools.data.DataStoreFactorySpi: Provider org.geotools.data.shapefile.ShapefileDirectoryFactory could not be instantiated
at java.util.ServiceLoader.fail(ServiceLoader.java:232)
at java.util.ServiceLoader.access$100(ServiceLoader.java:185)
at java.util.ServiceLoader$LazyIterator.nextService(ServiceLoader.java:384)
at java.util.ServiceLoader$LazyIterator.next(ServiceLoader.java:404)
at java.util.ServiceLoader$1.next(ServiceLoader.java:480)
at org.geotools.factory.FactoryRegistry.register(FactoryRegistry.java:826)
at org.geotools.factory.FactoryRegistry.scanForPlugins(FactoryRegistry.java:772)
at org.geotools.factory.FactoryRegistry.scanForPluginsIfNeeded(FactoryRegistry.java:805)
at org.geotools.factory.FactoryRegistry.getServiceProviders(FactoryRegistry.java:196)
at org.geotools.data.DataAccessFinder.getAvailableDataStores(DataAccessFinder.java:207)
at org.geotools.data.DataStoreFinder.getAvailableDataStores(DataStoreFinder.java:116)
at org.geotools.data.DataStoreFinder.getDataStore(DataStoreFinder.java:87)
at shapefile.ReadFile.main(ReadFile.java:24)
Caused by: java.lang.NoClassDefFoundError: org/geotools/data/directory/FileStoreFactory
at java.lang.Class.getDeclaredConstructors0(Native Method)
at java.lang.Class.privateGetDeclaredConstructors(Class.java:2671)
at java.lang.Class.getConstructor0(Class.java:3075)
at java.lang.Class.newInstance(Class.java:412)
at java.util.ServiceLoader$LazyIterator.nextService(ServiceLoader.java:380)
... 10 more
Caused by: java.lang.ClassNotFoundException: org.geotools.data.directory.FileStoreFactory
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 15 more

java.lang.NullPointerException

错误可能在该行

DataStore dataStore = DataStoreFinder.getDataStore(connect);

我该如何解决？我应该更改任何 java 参数吗？文件应该是全名吗？

Answer 1

要加载 shapefile，您可以使用以下代码：

ShapefileDataStore myShape = new ShapefileDataStore(new File("path/to/shapefile.shp").toURL());

确保路径正确。

Answer 2

我通过将 while 循环中的代码更改为以下代码解决了这个问题

while(iterator.hasNext()){
                Feature feature = iterator.next();
                SimpleFeature simple = (SimpleFeature)feature;
                Geometry sourcegeometry = (Geometry) simple.getDefaultGeometry();
}

Answer 3

请通过（至少）GeoTools'quickstart tutorial 找出使用 ShapeFile DataStore 所需的 jar。

TBH 如果不使用构建管理器，我什至不会尝试构建一个简单的 GeoTools 项目，生命太短，无需担心依赖关系。

如果你必须独自推进，那么你需要包括以下所有的罐子：

➜  shapefile git:(master) ✗ mvn dependency:tree
[INFO] Scanning for projects...
[INFO]                                                                         
[INFO] ------------------------------------------------------------------------
[INFO] Building Shapefile module 17-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO] 
[INFO] --- maven-dependency-plugin:2.8:tree (default-cli) @ gt-shapefile ---
[INFO] org.geotools:gt-shapefile:jar:17-SNAPSHOT
[INFO] +- org.geotools:gt-data:jar:17-SNAPSHOT:compile
[INFO] |  \- org.geotools:gt-main:jar:17-SNAPSHOT:compile
[INFO] |     +- org.geotools:gt-api:jar:17-SNAPSHOT:compile
[INFO] |     \- com.vividsolutions:jts:jar:1.13:compile
[INFO] +- org.jdom:jdom:jar:1.1.3:compile
[INFO] +- org.geotools:gt-sample-data:jar:17-SNAPSHOT:test
[INFO] +- org.geotools:gt-epsg-hsql:jar:17-SNAPSHOT:test
[INFO] |  +- org.geotools:gt-referencing:jar:17-SNAPSHOT:compile
[INFO] |  |  +- com.googlecode.efficient-java-matrix-library:core:jar:0.26:compile
[INFO] |  |  +- commons-pool:commons-pool:jar:1.5.4:compile
[INFO] |  |  +- org.geotools:gt-metadata:jar:17-SNAPSHOT:compile
[INFO] |  |  |  \- org.geotools:gt-opengis:jar:17-SNAPSHOT:compile
[INFO] |  |  |     \- net.java.dev.jsr-275:jsr-275:jar:1.0-beta-2:compile
[INFO] |  |  +- jgridshift:jgridshift:jar:1.0:compile
[INFO] |  |  \- net.sf.geographiclib:GeographicLib-Java:jar:1.44:compile
[INFO] |  \- org.hsqldb:hsqldb:jar:2.3.0:test
[INFO] +- org.geotools:gt-property:jar:17-SNAPSHOT:test
[INFO] +- commons-io:commons-io:jar:2.1:test
[INFO] +- javax.media:jai_core:jar:1.1.3:compile
[INFO] \- junit:junit:jar:4.11:test
[INFO]    \- org.hamcrest:hamcrest-core:jar:1.3:test