package org.sxkj.common.utils;
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import org.apache.commons.lang3.StringUtils;
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import org.geotools.geometry.jts.JTSFactoryFinder;
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import org.locationtech.jts.geom.Coordinate;
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import org.locationtech.jts.geom.Geometry;
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import org.locationtech.jts.geom.GeometryFactory;
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import org.locationtech.jts.geom.Point;
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import org.locationtech.jts.io.ParseException;
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import org.locationtech.jts.io.WKTReader;
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public class GeomUtils {
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private static final GeometryFactory geometryFactory = JTSFactoryFinder.getGeometryFactory();
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private static final WKTReader wktReader = new WKTReader(geometryFactory);
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public static boolean isGeomInvalid(String geom) {
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if (StringUtils.isBlank(geom)) {
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return false;
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}
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String upper = geom.trim().toUpperCase();
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return !upper.contains("POLYGON");
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}
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/**
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* 验证并转换几何数据，确保其有效
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* @param geom WKT格式的几何数据
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* @return 有效的几何数据，或null如果转换失败
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*/
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public static String validateAndFormatGeom(String geom) {
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if (StringUtils.isBlank(geom)) {
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return null;
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}
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try {
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// 解析WKT字符串
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Geometry geometry = wktReader.read(geom);
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// 如果几何数据无效，尝试修复
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if (!geometry.isValid()) {
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geometry = geometry.buffer(0);
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}
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// 确保几何数据有效
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if (geometry.isValid()) {
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return geometry.toText();
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} else {
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return null;
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}
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} catch (ParseException e) {
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// 解析失败
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return null;
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}
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}
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/**
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* 从几何数据中提取中心点坐标
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*
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* @param geom WKT格式的几何数据
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* @return 中心点坐标数组，格式为 [经度, 纬度]，如果提取失败返回null
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*/
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public static double[] extractCenterPoint(String geom) {
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if (StringUtils.isBlank(geom)) {
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return null;
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}
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try {
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// 解析WKT字符串
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Geometry geometry = wktReader.read(geom);
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// 获取几何对象的中心点
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Point centroid = geometry.getCentroid();
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if (centroid == null) {
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return null;
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}
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Coordinate coordinate = centroid.getCoordinate();
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if (coordinate == null) {
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return null;
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}
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// 返回 [经度, 纬度]
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return new double[]{coordinate.x, coordinate.y};
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} catch (ParseException e) {
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return null;
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}
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}
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}
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