如何使用bbox加载Open Layers 3 geojson矢量图层？

您需要添加一个Ajax回调，以将功能部件添加到矢量源中：

var vectorSource = new ol.source.Vector({  format: new ol.format.GeoJSON(),  loader: function(extent, resolution, projection) {    var url = 'geojson2.php?p=' + extent.join(',');    $.ajax({      url: url,      success: function(data) {        vectorSource.addFeatures(vectorSource.readFeatures(data));      }    });   },  projection: 'EPSG:3857',  strategy: ol.loadingstrategy.bbox});