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