无需刷新地图即可在Openlayers中动态设置矢量图层样式

// 创建矢量图层
var vectorLayer = new ol.layer.Vector({
  source: new ol.source.Vector()
});

// 动态设置矢量图层样式
function setVectorLayerStyle(color, width) {
  var style = new ol.style.Style({
    fill: new ol.style.Fill({
      color: color
    }),
    stroke: new ol.style.Stroke({
      color: color,
      width: width
    }),
    image: new ol.style.Circle({
      radius: 7,
      fill: new ol.style.Fill({
        color: color
      })
    })
  });

  vectorLayer.setStyle(style);
}

// 加载矢量数据
var vectorSource = vectorLayer.getSource();
vectorSource.addFeatures(yourFeatures);

// 添加矢量图层到地图
map.addLayer(vectorLayer);