231 lines
8.0 KiB
Java
231 lines
8.0 KiB
Java
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package com.cdzy.operations.handler;
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import com.fasterxml.jackson.core.JsonParser;
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import com.fasterxml.jackson.databind.DeserializationContext;
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import com.fasterxml.jackson.databind.JsonDeserializer;
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import com.fasterxml.jackson.databind.JsonNode;
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import lombok.extern.slf4j.Slf4j;
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import org.locationtech.jts.geom.*;
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import org.locationtech.jts.io.WKTReader;
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import java.io.IOException;
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import java.util.Locale;
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/**
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* JTS Point 反序列化器 - 将 JSON 反序列化为 Point
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* 支持多种 JSON 格式
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*/
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@Slf4j
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public class PointDeserializer extends JsonDeserializer<Point> {
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private final GeometryFactory geometryFactory = new GeometryFactory();
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@Override
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public Point deserialize(JsonParser p, DeserializationContext context) throws IOException {
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JsonNode node = p.getCodec().readTree(p);
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if (node.isNull()) {
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return null;
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}
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try {
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Point result = null;
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// 格式1: 自定义格式 {"type": "point", "coordinates": [lng, lat]}
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if (node.isObject() && node.has("type")) {
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String type = node.get("type").asText().toLowerCase(Locale.ROOT);
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if ("point".equals(type)) {
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result = parseFromCustomFormat(node);
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}
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}
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// 格式2: GeoJSON 格式 {"type": "Point", "coordinates": [lng, lat]}
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else if (node.isObject() && node.has("type")) {
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String type = node.get("type").asText();
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if ("Point".equals(type)) {
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result = parseFromGeoJSON(node);
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}
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}
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// 格式3: 坐标数组格式 [lng, lat]
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else if (node.isArray()) {
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result = parseFromArray(node);
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}
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// 格式4: 对象格式但没有 type 字段，尝试解析 coordinates 或直接解析 x,y
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else if (node.isObject()) {
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result = parseFromObject(node);
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}
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// 格式5: WKT 字符串格式 "POINT(lng lat)"
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else if (node.isTextual()) {
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result = parseFromWKT(node.asText());
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}
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if (result == null) {
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throw new IOException("""
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不支持的 Point JSON 格式，支持的格式包括：
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1. 自定义格式: {"type":"point","coordinates":[lng,lat]}
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2. GeoJSON格式: {"type":"Point","coordinates":[lng,lat]}
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3. 坐标数组: [lng,lat]
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4. 简单对象: {"lng":116.3974,"lat":39.9093} 或 {"x":116.3974,"y":39.9093}
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5. WKT字符串: "POINT(lng lat)"
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6. PostgreSQL点格式: "(lng,lat)\"""");
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}
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return result;
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} catch (Exception e) {
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log.error("!!! PointDeserializer 反序列化失败 !!!");
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log.error("错误信息: {}", e.getMessage());
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log.error("输入 JSON: {}", node);
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throw new IOException("Point 反序列化失败: " + e.getMessage(), e);
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}
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}
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@Override
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public Class<Point> handledType() {
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return Point.class;
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}
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/**
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* 解析自定义格式：{"type":"point","coordinates":[lng,lat]}
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*/
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private Point parseFromCustomFormat(JsonNode node) throws IOException {
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JsonNode coordinatesNode = node.get("coordinates");
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if (coordinatesNode == null) {
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throw new IOException("coordinates 字段缺失");
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}
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return parseCoordinates(coordinatesNode);
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}
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/**
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* 解析 GeoJSON 格式：{"type":"Point","coordinates":[lng,lat]}
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*/
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private Point parseFromGeoJSON(JsonNode node) throws IOException {
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JsonNode coordinatesNode = node.get("coordinates");
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if (coordinatesNode == null) {
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throw new IOException("coordinates 字段缺失");
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}
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return parseCoordinates(coordinatesNode);
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}
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/**
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* 解析坐标数组格式：[lng, lat]
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*/
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private Point parseFromArray(JsonNode node) throws IOException {
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return parseCoordinates(node);
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}
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/**
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* 解析对象格式：{"lng":116.3974,"lat":39.9093} 或 {"x":116.3974,"y":39.9093}
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*/
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private Point parseFromObject(JsonNode node) throws IOException {
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// 尝试 lng/lat 格式
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if (node.has("lng") && node.has("lat")) {
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try {
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double lng = node.get("lng").asDouble();
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double lat = node.get("lat").asDouble();
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return geometryFactory.createPoint(new Coordinate(lng, lat));
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} catch (NumberFormatException e) {
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throw new IOException("lng/lat 格式错误: " + node, e);
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}
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}
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// 尝试 x/y 格式
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if (node.has("x") && node.has("y")) {
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try {
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double x = node.get("x").asDouble();
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double y = node.get("y").asDouble();
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return geometryFactory.createPoint(new Coordinate(x, y));
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} catch (NumberFormatException e) {
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throw new IOException("x/y 格式错误: " + node, e);
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}
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}
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// 尝试 coordinates 格式
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if (node.has("coordinates")) {
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return parseCoordinates(node.get("coordinates"));
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}
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throw new IOException("对象格式不支持: " + node);
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}
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/**
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* 解析 WKT 字符串格式：POINT(lng lat)
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*/
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private Point parseFromWKT(String wktString) throws IOException {
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if (wktString == null || wktString.trim().isEmpty()) {
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throw new IOException("WKT 字符串为空");
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}
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try {
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wktString = wktString.trim();
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// 支持 PostgreSQL 点格式转换：(x,y) -> POINT(x y)
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if (wktString.startsWith("(") && wktString.endsWith(")")) {
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wktString = convertPostgresPointToWKT(wktString);
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}
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// 确保是有效的 WKT
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if (!wktString.toUpperCase().startsWith("POINT")) {
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wktString = "POINT(" + wktString + ")";
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}
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WKTReader reader = new WKTReader(geometryFactory);
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Geometry geometry = reader.read(wktString);
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if (!(geometry instanceof Point)) {
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throw new IOException("WKT 字符串不是有效的 Point: " + wktString);
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}
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return (Point) geometry;
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} catch (Exception e) {
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throw new IOException("WKT 格式解析失败: " + wktString, e);
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}
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}
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/**
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* 解析坐标节点
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*/
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private Point parseCoordinates(JsonNode coordinatesNode) throws IOException {
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if (coordinatesNode == null) {
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throw new IOException("坐标节点为 null");
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}
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if (!coordinatesNode.isArray()) {
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throw new IOException("coordinates 字段必须是数组类型");
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}
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if (coordinatesNode.size() < 2) {
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throw new IOException("坐标数组至少需要2个值（经度和纬度）");
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}
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try {
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double lng = coordinatesNode.get(0).asDouble();
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double lat = coordinatesNode.get(1).asDouble();
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return geometryFactory.createPoint(new Coordinate(lng, lat));
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} catch (NumberFormatException e) {
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throw new IOException("坐标格式错误: " + coordinatesNode, e);
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}
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}
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/**
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* 转换 PostgreSQL 点格式到 WKT 格式
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*/
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private String convertPostgresPointToWKT(String pgPointString) {
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// PostgreSQL 格式: (x,y) 或 (x, y)
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// WKT 格式: POINT(x y)
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String cleaned = pgPointString
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.replaceAll("\\s+", "") // 移除所有空格
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.replace("(", "")
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.replace(")", "");
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String[] coords = cleaned.split(",");
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if (coords.length >= 2) {
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return "POINT(" + coords[0] + " " + coords[1] + ")";
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}
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return pgPointString; // 无法转换，返回原值
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}
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}
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