GeoJSONReader的read未对breakType进行区分，导致读取属性不全，而无法加载。

[xcmonline]

`
public static VectorLayer read(FeatureCollection features) {
Shape shape = GeoJSONUtil.toShape(features.getFeature(0).getGeometry());
VectorLayer layer = new VectorLayer(shape.getShapeType());
String fieldName = "title";
layer.editAddField(fieldName, DataType.STRING);
LegendScheme ls = new LegendScheme(shape.getShapeType());
ls.setLegendType(LegendType.UNIQUE_VALUE);
ls.setFieldName(fieldName);

    for(int i = 0; i < features.getNumFeatures(); ++i) {
        Feature feature = features.getFeature(i);
        Map<String, Object> properties = feature.getProperties();
        String titleValue = (String)properties.get("title");
        PolygonBreak cb = new PolygonBreak();
        cb.setStartValue(titleValue);
        cb.setCaption(titleValue);

        **### //需要对 breakType区分，因为在 GeoJSONWriter 中的 write做了区别，导致一些类型的属性没有而产生异常**

        Color color = ColorUtil.parseToColor((String)properties.get("fill"));
        float alpha = Float.parseFloat(properties.get("fill-opacity").toString());
        color = ColorUtil.getColor(color, alpha);
        cb.setColor(color);
        color = ColorUtil.parseToColor((String)properties.get("stroke"));
        alpha = Float.parseFloat(properties.get("stroke-opacity").toString());
        color = ColorUtil.getColor(color, alpha);
        cb.setOutlineColor(color);
        float lineWidth = Float.parseFloat(properties.get("stroke-width").toString());
        cb.setOutlineSize(lineWidth);


        ls.addLegendBreak(cb);
        Geometry geometry = feature.getGeometry();
        if (geometry != null) {
            try {
                int idx = layer.getShapeNum();
                layer.editInsertShape(GeoJSONUtil.toShape(geometry), idx);
                layer.editCellValue(fieldName, idx, titleValue);
            } catch (Exception var15) {
                throw new RuntimeException(var15);
            }
        }
    }

    layer.setLegendScheme(ls);
    return layer;
}

`

[Yaqiang]

GeoJSONReader is still in draft state and I will try to improve it. Also any code contribution is wellcome. It's appreciated if you could provide an example data file for testing.