API文档

http://shengshifeiyang.gitee.io/geotools-learning/
/**
 * 判断以x,y为坐标的点point(x,y)是否在geometry表示的Polygon中
 * @param x
 * @param y
 * @param geometry wkt格式 POLYGON((0 0, 10 0, 10 10, 0 10,0 0))
 * @return
 */
public static boolean withinGeo(double x,double y,String geometry) throws ParseException {
    GeometryFactory geometryFactory = new GeometryFactory();
    Coordinate coord = new Coordinate(x,y);
    Point point = geometryFactory.createPoint( coord );
    WKTReader reader = new WKTReader( geometryFactory );
    Polygon polygon = (Polygon) reader.read(geometry);
    return point.within(polygon);
}

public static void main(String[] args) throws Exception {

    //请自行搜素了解wkt格式
　　//wktPoly 1.点位要有顺序，需要按顺序画成封闭区域；2.最后一个点位和第一个点位相同，完成闭环

    String wktPoly = "POLYGON ((121 29, 121 30, 122 30, 122 29,121 29))"; 

    String wktPoint = "POINT (121.664564 29.971667)";
    GeometryFactory geometryFactory = new GeometryFactory();
    WKTReader reader = new WKTReader(geometryFactory);
    Geometry point = reader.read(wktPoint);
    Geometry poly = reader.read(wktPoly);
    boolean ex = poly.contains(point);
    System.out.println("ex = " + ex);
    List<String> list = new ArrayList<>();
    list.add("121 29");
    list.add("121 30");
    list.add("122 30");
    list.add("122 29");
    String polygon = "POLYGON (("+ StringUtils.join(list,",")+","+list.get(0)+"))";
    System.out.println(polygon);
    String point1 = "POINT ("+"121.664564"+" "+"29.971667"+")";

    boolean b = withinGeo(121.664564, 29.971667, polygon);
    System.out.println(b);
}

wkt区域围栏