Geoserver+Openlayers拉框查询

番茄西红柿发布于2019-04-23 11:46 / 1792人阅读

摘要：注意的版本号，高版本存在中新语法不兼容的情况查询类型点击多边形拉框图层名称，可以是单个或多个重点，不要改变回调函数声明加载函数传参解决跨域的关键回调回调函数使用载入要素用于删除之前的框，表示号，随便取一个删除之前的部分

<!DOCTYPE html>
<html>
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
    <title>OpenLayers</title>
    <link rel="stylesheet" href="geoserver/ol.css" type="text/css">
    <script src="geoserver/ol.js"></script>
    <script src="bower_components/jquery/dist/jquery.min.js"></script>
    <link rel="stylesheet" href="plugins/layui-v2.4.3/layui/css/layui.css">
    <script src="plugins/layui-v2.4.3/layui/layui.js" charset="utf-8"></script>
    <link rel="stylesheet" href="https://openlayers.org/en/v3.20.1/css/ol.css" type="text/css">
    <#--注意openlayer的版本号，高版本存在es6中新语法不兼容的情况-->
    <script src="https://cdn.polyfill.io/v2/polyfill.min.js?features=requestAnimationFrame,Element.prototype.classList,URL"></script>
    <script src="https://openlayers.org/en/v3.20.1/build/ol.js"></script>
</head>
<style>
    #map {
        height: 600px;
        /*width: 1024px;*/
        /* float: left;*/
    }
</style>
<body>
<div id="map">
<form class="form-inline">
    <label>查询类型</label>
    <select id="type">
        <option value="None">None</option>
        <option value="Point">点击</option>
        <option value="Polygon">多边形</option>
        <option value="Circle">拉框</option>
    </select>
</form>
</div>
<script>
    var map = new ol.Map({
        target: 'map',
        view: new ol.View({
            projection: 'EPSG:4326',
            center: [104.07, 30.72],
            zoom: 7
        })
    });
    var wfsParams = {
        service: 'WFS',
        version: '1.1.1',
        request: 'GetFeature',
        typeName: 'map_dz:tl_lx_g',  //图层名称，可以是单个或多个
        outputFormat: 'text/javascript',  //重点，不要改变
        format_options: 'callback:loadFeatures'  //回调函数声明
    };
 
    var vectorSource = new ol.source.Vector({
        format: new ol.format.GeoJSON(),
        loader: function (extent, resolution, projection) {  //加载函数
            var url = 'http://192.168.1.113:8080/geoserver/map_dz/wms';
            $.ajax({
                url: url,
                data: $.param(wfsParams),   //传参
                type: 'GET',
                dataType: 'jsonp',   //解决跨域的关键
                jsonpCallback: 'loadFeatures'  //回调
 
            });
        },
        strategy: ol.loadingstrategy.tile(new ol.tilegrid.createXYZ({
            maxZoom: 20
        })),
        projection: 'EPSG:4326'
    });
    //回调函数使用
    window.loadFeatures = function (response) {
        vectorSource.addFeatures((new ol.format.GeoJSON()).readFeatures(response));  //载入要素
    };
    var vectorLayer = new ol.layer.Vector({
        source: vectorSource,
        style: new ol.style.Style({
            stroke: new ol.style.Stroke({
                color: 'rgba(0, 0, 255, 1.0)',
                width: 2
            })
        })
    });
    map.addLayer(vectorLayer);
    var draw;
    var typeSelect = document.getElementById('type');
    var value;
    var num=10;//用于删除之前的框，表示号，随便取一个
    function addInteraction() {
        if (value !== 'None') {
            if (value === 'Polygon') {
                draw = new ol.interaction.Draw({
                    source: vectorLayer.getSource(),
                    style: new ol.style.Style({
                        stroke: new ol.style.Stroke({
                            color: '#ffcc33',
                            width: 2
                        }),
                        image: new ol.style.Circle({
                            radius: 7,
                            fill: new ol.style.Fill({
                                color: '#ffcc33'
                            })
                        })
                    }),
                    type: value
                });
            } else if (value === 'Circle') {
                draw = new ol.interaction.Draw({
                    source: vectorLayer.getSource(),
                    style: new ol.style.Style({
                        stroke: new ol.style.Stroke({
                            color: '#ffcc33',
                            width: 2
                        }),
                        image: new ol.style.Circle({
                            radius: 7,
                            fill: new ol.style.Fill({
                                color: '#ffcc33'
                            })
                        })
                    }),
                    type: value,
                    geometryFunction: ol.interaction.Draw.createBox()
                });
            } else if (value === 'Point') {
                draw = new ol.interaction.Draw({
                    source: vectorLayer.getSource(),
                    style: new ol.style.Style({
                        stroke: new ol.style.Stroke({
                            color: '#ffcc33',
                            width: 2
                        }),
                        image: new ol.style.Circle({
                            radius: 7,
                            fill: new ol.style.Fill({
                                color: '#ffcc33'
                            })
                        })
                    }),
                    type: value
                });
            }
 
            map.addInteraction(draw);
            //删除之前draw的部分
            draw.on('drawstart',function(evt) {
                var featureAdd=vectorLayer.getSource().getFeatureById(num);
                if(featureAdd!=null){
                    vectorLayer.getSource().removeFeature(featureAdd);
                }
            });
            //绘图结束，处理选中部分
            draw.on('drawend',function(e){
                e.feature.setId(num);
                var geom=e.feature.getGeometry();
                var coor = geom.v;
                mapSelect(coor);
            });
        }
    }
    //选择事件
    typeSelect.onchange = function() {
        value = typeSelect.value;
        map.removeInteraction(draw);
        addInteraction();
    };
 
    //draw图像与原始数据相交
    function mapSelect(coor) {
        if(value=='Point') {
            coor = [coor[0]-0.0001,coor[1]-0.0001,coor[0]+0.0001,coor[1]+0.0001];
        }
        var FILTER = '<Filter xmlns:ogc="http://www.opengis.net/ogc" xmlns:gml="http://www.opengis.net/gml"><BBOX><PropertyName>geom</PropertyName><gml:Envelope srsName="EPSG:4326"><gml:lowerCorner>' + coor[0] + '  ' + coor[1] + '</gml:lowerCorner><gml:upperCorner>' + coor[2] + '  ' + coor[3] + '</gml:upperCorner></gml:Envelope></BBOX></Filter>';
        getFeature({
            typename: 'map_dz:tl_lx_g',//查询的服务图层名称
            filter: FILTER,//查询条件
            callback: 'getIdentifyroadGrid'//查询的回调函数
        });
    }
    var selectNum=[];
    var geojsonFormat = new ol.format.GeoJSON({defaultDataProjection: "EPSG:4326"});
    function getIdentifyroadGrid(res) {
        var queryData = [];
        var features = geojsonFormat.readFeatures(res);
 
       for (var nu = 0; nu<selectNum.length;nu++) {
            var featureSelect=vectorLayer.getSource().getFeatureById(selectNum[nu]);
            if(featureSelect!=null) {
                featureSelect.setStyle(
                        new ol.style.Style({
                            stroke: new ol.style.Stroke({
                                color: 'rgba(0, 0, 255, 1.0)',
                                width: 2
                            })
                        }));
            }
        }
        selectNum=[];
        for (var i = 0; i < features.length; i++) {
            var feature = features[i];
            console.log(feature);
            selectNum.push(feature.f);
            var featureSelectCurrent=vectorLayer.getSource().getFeatureById(feature.f);
            featureSelectCurrent.setStyle(
                    new ol.style.Style({
                        stroke: new ol.style.Stroke({
                            color: '#ff4118',
                            width: 2
                        })
                    }));
            var lxmc = feature.H["lxmc"];
            var ldbm = feature.H["ldbm"];
            var lxbh = feature.H["lxbh"];
            var result = {
                "lxmc": lxmc,
                "ldbm": ldbm,
                "lxbh": lxbh,
                "setindex": i
            };
            queryData.push(result)
        }
        console.log(selectNum);
        var tableIns=null;
        var dataTable = "<table class="layui-table" lay-filter="demo" id="joinTab"></table>";
        layui.use(['table', 'layer'], function () {
            var table = layui.table;
            var layer = layui.layer;
            var index = layer.open({
                type: 1 //Page层类型
                , title: '要素属性'
                , shade: 0 //遮罩透明度
                , anim: 0 //0-6的动画形式，-1不开启
                , content: dataTable
                , offset: ['250px', '290px']
                , zIndex: 1
                , scrollbar: false
                , resize: false
                , skin: 'layui-layer-molv'
                , closeBtn: 2
                , btn: ["关闭"]
                , yes: function (index) {
                    layer.close(index);
                }
                , cancel: function () {
                }
            });
            tableIns = table.render({
                elem: "#joinTab",
                width: "auto",
                height: "auto",
                data: queryData,
                initSort: {field: 'lxbh', type: 'desc'},
                cols: [[
                    {field: 'lxmc', title: '路线名称', width: 150, align: 'center', sort: true},
                    {field: 'ldbm', title: '路线编号', width: 150, align: 'center', sort: true},
                    {field: 'lxbh', title: '路段编码', width: 150, align: 'center', sort: true}
                ]]
            });
            layer.style(index, {
                opacity: 0.8
            });
        });
 
        if (tableIns) {
            tableIns.reload({
                data: queryData
            });
        } else {
            // console.log("Do Nothing!");
        }
    }
 
    //请求wfs数据
    function getFeature(options) {
        $.ajax(/*'http://192.168.1.113:8080/geoserver/map_dz/wms', */{
            type: 'GET',
            url: 'http://192.168.1.113:8080/geoserver/map_dz/wms',
            data: {
                service: 'WFS',
                version: '1.1.1',
                request: 'GetFeature',
                typename: options.typename,
                srsname: options.srid,
                outputFormat: 'text/javascript',
                viewparams: options.viewparams,
                bbox: (options.extent === undefined) ? undefined : options.extent.join(',') + ',' + options.srid,
                filter: options.filter
            },
            dataType: 'jsonp',
            jsonp: 'format_options',
            jsonpCallback: 'callback:' + options.callback
        });
 
    }
 
</script>
</body>
</html>

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