postgres多边形存储--解决 Points of LinearRing do not form a closed linestring

Points of LinearRing do not form a closed linestring错误是多边形不是闭合的区域的原因。

polygon的格式，需要开始点跟结束点一致，这样才能形成闭合区域。

String str = "POLYGON((120.5521 60.6667,121.5521 60.6667,120.6921 61.6667,122.6921 61.6667,120.5521 60.6667))";

具体存储的Java代码，wkt的生成Geometry：

public class Test {
    public static void main(String args[]){
        String str = "POLYGON((120.5521 60.6667,121.5521 60.6667,120.6921 61.6667,122.6921 61.6667,120.5521 60.6667))";
        Geometry t = wktToGeometry(str) ;
        System.out.println("result:"+t);
    }

    /*
 生成postgis的几何类型
  */
    private static Geometry wktToGeometry(String wktPoint) {
        WKTReader fromText = new WKTReader();
        Geometry geom = null;
        try {
            geom = fromText.read(wktPoint);
        } catch (ParseException e) {
            throw new RuntimeException("Not a WKT string:" + wktPoint);
        }
        return geom;
    }
}