openlayers 2 高亮显示元素以及通过属性查询高亮某一元素

本文参考官网例子，略作修改，直接上代码：

1、实现hover和click高亮显示

        var map, controls;
        OpenLayers.Feature.Vector.style['default']['strokeWidth'] = '2';
        var vectors;
        var highlightCtrl;
        function init(){
            map = new OpenLayers.Map('map');

            vectors = new OpenLayers.Layer.Vector("vector", {isBaseLayer: true});
            map.addLayers([vectors]);

            var feature = new OpenLayers.Feature.Vector(
                OpenLayers.Geometry.fromWKT(
                    "POLYGON((28.828125 0.3515625, 132.1875 -13.0078125, -1.40625 -59.4140625, 28.828125 0.3515625))"
                )
            );
            vectors.addFeatures([feature]);

            var feature2 = new OpenLayers.Feature.Vector(
                OpenLayers.Geometry.fromWKT(
                    "POLYGON((-120.828125 -50.3515625, -80.1875 -80.0078125, -40.40625 -20.4140625, -120.828125 -50.3515625))"
                )
            );
            vectors.addFeatures([feature2]);

            var report = function(e) {
                OpenLayers.Console.log(e.type, e.feature.id);
            };
            
            highlightCtrl = new OpenLayers.Control.SelectFeature(vectors, {
                hover: true,
                highlightOnly: true,
                renderIntent: "temporary",
                eventListeners: {
                    beforefeaturehighlighted: report,
                    featurehighlighted: report,
                    featureunhighlighted: report
                }
            });

            var selectCtrl = new OpenLayers.Control.SelectFeature(vectors,
                {clickout: true}
            );

            map.addControl(highlightCtrl);
            map.addControl(selectCtrl);

            highlightCtrl.activate();
            selectCtrl.activate();

            map.setCenter(new OpenLayers.LonLat(0, 0), 1);

        }

2、实现属性查询高亮某一元素，此处简单的通过button的click事件测试，代码如下：

备注：使用hightlight和unhighlight是一样的效果

        //高亮显示
　　　　 function mySelect() {
            console.log(vectors.features);
            var feature = vectors.features[0];
            highlightCtrl.select(feature);
        }
　　　　 //取消高亮显示
        function myUnselect() {
            var feature = vectors.features[0];
            highlightCtrl.unselect(feature);
        }

3、通过属性查询获得features

var features = vectorlayer.getFeaturesByAttribute("name", "名称");

将得到的features[0]传递给上面的高亮函数即可