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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;    }}

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