8.13shpToGeojson
csdn资料：https://blog.csdn.net/fengyekafei/article/details/79355229
github开源项目：https://github.com/AJJackGIS/shp2geojson
下载路径:
整合好的路径：
打好的jar路径：C:\Users\刘琛运\Desktop\java_architect\resources\SuperMap\work\shpToGeojson\自己整合的\整合的jar一、问题
1.多文件
jinja2
不光是一个shp，还有shx，和dbf ，至少这三个文件2.最大的问题：流，现在只能读取文件
3.我打的jar有几百k，是否过大？,它内部引用了其他jar（看二就知道了）
4.返回的是字符串？文件？还是什么？
##二、整合
###1.开源项目github
###2.我给它打成jar包
C:\Users\刘琛运\Desktop\java_architect\resources\SuperMap\work\shpToGeojson\自己整合的\整合的jar\shpToGeojson.jar###3.我改装了个工具类
java
/**
* // 将一个SHP文件转成GeoJson格式的数据
* @param path 文件路徑
* @param fileName 文件名
*/
public static String shpToGeojson(String path,String fileName) {
try {
ShapeFile shapeFile = new ShapeFile(path, fileName).READ();
List<Map<String, Object>> properties = new ArrayList<>(); // 用来存储所有对象的属性信息
// 获取属性表名称
int fieldCount = shapeFile.getDBF_fieldCount(); // 字段个数
// 获取属性表数据
int dataCount = shapeFile.getDBF_recordCount(); // 记录条数
// 取出字段名称和值信息
for (int i = 0; i < dataCount; i++) {
Map<String, Object> map = new HashMap<>();
for (int j = 0; j < fieldCount; j++) {
String fieldName = shapeFile.getDBF_field(j).getName(); // 字段名称
fieldName = new String(fieldName.getBytes("ISO-8859-1"), "gbk");// =====需要注意的：ISO-8859-1 字符是shapefile读取工具设置的编码，但是arcgis是以gbk编码字符存储的==========//
fieldName = (fieldName != null) ? fieldName.trim() : fieldName; // 剔除空白
String fieldValue = shapeFile.getDBF_record(i, j); // 字段对应的值
fieldValue = new String(fieldValue.getBytes("ISO-8859-1"), "gbk");
fieldValue = (fieldValue != null) ? fieldValue.trim() : fieldValue; // 剔除空白
map.put(fieldName, fieldValue);
}
map.put("color", randomColor()); // 添加一个随机色
properties.add(map);
}
// 获取图形类型====（点、线、面）
ShpShape.Type shapeType = shapeFile.getSHP_shapeType();
GeoFeatureCollection collection = new GeoFeatureCollection(); // 用来创建GeoJson对象
if (shapeType.isTypeOfPoint()) { // 单点
ArrayList<Object> pointShapes = shapeFile.getSHP_shape();
for (int i = 0; i < pointShapes.size(); i++) {
ShpPoint point = (ShpPoint) pointShapes.get(i);
GeoFeature feature = new GeoFeature();
GeoGeometryPoint geoPoint = new GeoGeometryPoint();
double[] xyz = point.getPoint();
double[] xy = new double[]{xyz[0], xyz[1]}; // 去掉z坐标，只保留xy
geoPoint.setCoordinates(xy);
feature.setGeometry(geoPoint);
feature.setProperties(properties.get(i));
collection.getFeatures().add(feature);
}
} else if (shapeType.isTypeOfMultiPoint()) { // 多点
ArrayList<Object> pointsShapes = shapeFile.getSHP_shape();
for (int i = 0; i < pointsShapes.size(); i++) {
ShpMultiPoint points = (ShpMultiPoint) pointsShapes.get(i);
GeoFeature feature = new GeoFeature();
GeoGeometryMultiPoint geoMultiPoint = new GeoGeometryMultiPoint();
double[][] num_xyz = points.getPoints();
List<double[]> num_xy = new ArrayList<>(); // 去掉z坐标，只保留xy
for (int n = 0; n < num_xyz.length; n++) {
num_xy.add(new double[]{num_xyz[n][0], num_xyz[n][1]});
}
geoMultiPoint.setCoordinates(num_xy);
feature.setGeometry(geoMultiPoint);
feature.setProperties(properties.get(i));
collection.getFeatures().add(feature);
}
} else if (shapeType.isTypeOfPolyLine()) { // 线
ArrayList<Object> lineShapes = shapeFile.getSHP_shape();
for (int i = 0; i < lineShapes.size(); i++) {
ShpPolyLine line = (ShpPolyLine) lineShapes.get(i);
GeoFeature feature = new GeoFeature();
if (line.getNumberOfParts() == 1) { // 单线
GeoGeometryLineString geoLine = new GeoGeometryLineString();
double[][] num_xyz = line.getPoints(); //[number of points][x,y,z]
List<double[]> num_xy = new ArrayList<>(); // 去掉z坐标，只保留xy
for (int n = 0; n < num_xyz.length; n++) {
num_xy.add(new double[]{num_xyz[n][0], num_xyz[n][1]});
}
geoLine.setCoordinates(num_xy);
feature.setGeometry(geoLine);
feature.setProperties(properties.get(i));
collection.getFeatures().add(feature);
} else { // 多线
GeoGeometryMultiLineString geoMultiLine = new GeoGeometryMultiLineString();
double[][][] line_num_xyz = line.getPointsAs3DArray(); // [number of polylines][number of points per polyline][x, y, z, m]
List<List<double[]>> line_num_xy = new ArrayList<>(); // 去掉z坐标，只保留xy
for (int n = 0; n < line_num_xyz.length; n++) {
List<double[]> line_points = new ArrayList<>();
for (int k = 0; k < line_num_xyz[n].length; k++) {
line_points.add(new double[]{line_num_xyz[n][k][0], line_num_xyz[n][k][1]});
}
line_num_xy.add(line_points);
}
geoMultiLine.setCoordinates(line_num_xy);
feature.setGeometry(geoMultiLine);
feature.setProperties(properties.get(i));
collection.getFeatures().add(feature);
}
}
} else if (shapeType.isTypeOfPolygon()) { // 面
ArrayList<Object> polygonShapes = shapeFile.getSHP_shape();
for (int i = 0; i < polygonShapes.size(); i++) {
ShpPolygon polygon = (ShpPolygon) polygonShapes.get(i);
GeoFeature feature = new GeoFeature();
if (polygon.getNumberOfParts() == 1) { // 单面
GeoGeometryPolygon geoPolygon = new GeoGeometryPolygon();
double[][] num_xyz = polygon.getPoints(); // [number of points][x,y,z]
List<List<double[]>> num_xy = new ArrayList<>();
List<double[]> xy = new ArrayList<>();
for (int k = 0; k < num_xyz.length; k++) {
xy.add(new double[]{num_xyz[k][0], num_xyz[k][1]});
}
num_xy.add(xy);
geoPolygon.setCoordinates(num_xy);
feature.setGeometry(geoPolygon);
feature.setProperties(properties.get(i));
collection.getFeatures().add(feature);
} else { // 多面
GeoGeometryMultiPolygon geoMutliPolygon = new GeoGeometryMultiPolygon();
double[][][] poly_num_xyz = polygon.getPointsAs3DArray();
List<List<List<double[]>>> poly_num_xys = new ArrayList<>();
List<List<double[]>> poly_num_xy = new ArrayList<>(); // 去掉z坐标，只保留xy
for (int n = 0; n < poly_num_xyz.length; n++) {
List<double[]> poly_points = new ArrayList<>();
for (int k = 0; k < poly_num_xyz[n].length; k++) {
poly_points.add(new double[]{poly_num_xyz[n][k][0], poly_num_xyz[n][k][1]});
}
poly_num_xy.add(poly_points);
}
poly_num_xys.add(poly_num_xy);
geoMutliPolygon.setCoordinates(poly_num_xys);
feature.setGeometry(geoMutliPolygon);
feature.setProperties(properties.get(i));
collection.getFeatures().add(feature);
}
}
}
Gson geoJson = new Gson();
//json数据
String json = geoJson.toJson(collection);
FileUtils.writeStringToFile(new File(path+"\\"+fileName+".json"), json, "utf-8");
return json;
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
// 生成随机色
private static String randomColor() {
StringBuffer sb = new StringBuffer();
for (int i = 0; i < 6; i++) {
int n = new Random().nextInt(16);
String c = Integer.toHexString(n);
sb.append(c);
}
return "#".concat(sb.toString());
}###4.测试类
java
public class TestDemo {
// 将一个SHP文件转成GeoJson格式的数据
public static void main(String[] args) {
String path = "D:\\map";
String fileName = "map";
String shpToGeojson = ShpToGeojsonUtils.shpToGeojson(path, fileName);
System.out.println(shpToGeojson);
}
}###5.成功
经测试输出的json数据没问题
mvn install:install-file -DgroupId=org.geotools -DartifactId=gt-opengis -Dversion=21.2 -Dpackaging=jar -Dfile=D:\SuperMap学习资料\geotools-21.2\gt-opengis-21.2.jar三、尝试用geotools，一堆错，放弃