OSM数据路网拓扑结构提取

要看路网数据什么格式，例如扩展名是.shp的就应该是shapefile,对应shapefile我们可以在搜索引擎中搜索java shapefile查找相关库，例如GeoTools http://geotools.org/

如果觉得官方文档比较难定位到相关用法，stackoverflow上也有shapefile解析的回答 https://stackoverflow.com/questions/2044876/does-anyone-know-of-a-library-in-java-that-can-parse-esri-shapefiles

File file = new File("mayshapefile.shp");

try {
  Map<String, String> connect = new HashMap();
  connect.put("url", file.toURI().toString());

  DataStore dataStore = DataStoreFinder.getDataStore(connect);
  String[] typeNames = dataStore.getTypeNames();
  String typeName = typeNames[0];

  System.out.println("Reading content " + typeName);

  FeatureSource featureSource = dataStore.getFeatureSource(typeName);
  FeatureCollection collection = featureSource.getFeatures();
  FeatureIterator iterator = collection.features();


  try {
    while (iterator.hasNext()) {
      Feature feature = iterator.next();
      GeometryAttribute sourceGeometry = feature.getDefaultGeometryProperty();
    }
  } finally {
    iterator.close();
  }

} catch (Throwable e) {}