【Java】WGS84转2000国家大地坐标系(CGCS2000)

引用Eclipse在github上的一个开源项目https://github.com/locationtech/proj4j

1. pom.xml引入依赖

<!-- https://mvnrepository.com/artifact/org.locationtech.proj4j/proj4j -->
<dependency>
    <groupId>org.locationtech.proj4j</groupId>
    <artifactId>proj4j</artifactId>
    <version>1.3.0</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.locationtech.proj4j/proj4j-epsg -->
<dependency>
    <groupId>org.locationtech.proj4j</groupId>
    <artifactId>proj4j-epsg</artifactId>
    <version>1.3.0</version>
</dependency>

2. 转换工具类定义

// 导包
import org.locationtech.proj4j.*;

// 工具类定义
public class CoordinatesUtil {
    /**
     * WGS84->2000国家大地坐标系(CGCS2000)
     *
     * @param longitude WGS84经度值
     * @param latitude WGS84纬度值
     * @return x,y CGCS2000经度值,CGCS2000纬度值
     */
    public static String WGS84ToCGCS2000(double longitude, double latitude) {
        CRSFactory crsFactory = new CRSFactory();
        CoordinateReferenceSystem WGS84 = crsFactory.createFromName("epsg:4326");
        // 根据经度范围确定转换标准,具体EPSG定义参考https://epsg.io
        String degree3EPSG = "epsg:4528";
        if (longitude < 76.3) {
            // CGCS2000 / 3-degree Gauss-Kruger zone 25
            degree3EPSG = "epsg:4513";
        } else if (longitude >= 76.3 && longitude < 79.3) {
            // CGCS2000 / 3-degree Gauss-Kruger zone 26
            degree3EPSG = "epsg:4514";
        } else if (longitude >= 79.3 && longitude < 82.3) {
            // CGCS2000 / 3-degre