openlayers 添加行政區域 geojson

let layers = new VectorLayer({
        source: new VectorSource({
            projection: 'EPSG:4326',
            url: "/json/510100.json",
            format: new GeoJSON()
        }),
        opacity: 0.5,
        style: function(feature) {
            return new Style({
                stroke: new Stroke({
                    color: 'rgba(42, 184, 255, 1)',
                    width: 2,
                    opacity: 1
                }),
                fill: new Fill({
                    color: 'rgba(18, 35, 92, 1)',
                }),
                text: new Text({
                    text: feature.get('name'),
                    font: '14px bold serif',
                    fill: new Fill({
                        color: '#fff'
                    }),
                    stroke: new Stroke({
                        color: 'rgba(42, 184, 255, 1)',
                        width: 2
                    })
                })
            })
        }
    });

    map.addLayer(layers);