openlayers6结合geoserver利用WFS服务实现图层删除功能(附源码下载)

Posted 2020-11-28 giserhome

内容概览

1.openlayers6结合geoserver利用WFS服务实现图层删除功能
2.源代码demo下载

效果图如下：

本篇主要是在上一篇openlayers6结合geoserver利用WFS服务实现图层新增功能(附源码下载)基础上实现的，openlayers6通过调用geoserver发布的地图服务WFS来达到图层删除记录的目的。与GeoServer的WFS进行基于Rest交互关键就在于请求参数，值得注意的是这些请求最好采用POST方法发送。查询可以采用json，但增加，删除，修改都只能采用XML形式Transaction

• 部分核心代码，完整的见源码demo下载

//叠加geoserver发布的wms图层
var geoserverUrl = ‘http://localhost:8080/geoserver/WebGIS‘;
var wmsSource = new TileWMS({
url: geoserverUrl+‘/wms‘,
params: {‘LAYERS‘: ‘WebGIS:testLayer‘, ‘TILED‘: true},
serverType: ‘geoserver‘,
crossOrigin: ‘anonymous‘
});
 
var wmsLayer = new TileLayer({
source: wmsSource
});
 
 
var view = new View({
projection: ‘EPSG:4326‘,
center: [113.90271877, 22.95186415],
zoom: 13
})
 
var map = new Map({
target: ‘map‘,
layers: [
new TileLayer({
source: new XYZ({
//url: ‘https://{a-c}.tile.openstreetmap.org/{z}/{x}/{y}.png‘
url: ‘http://cache1.arcgisonline.cn/arcgis/rest/services/ChinaOnlineStreetPurplishBlue/MapServer/tile/{z}/{y}/{x}‘
})
}),
wmsLayer
],
overlays: [overlay],
view: view
});
 
//监听地图鼠标事件
map.on(‘singleclick‘,function(e) {
if (e.dragging) {
return;
}
var feature =map.forEachFeatureAtPixel(e.pixel,
function(feature) {
return feature;
});
//console.log(‘feature‘,feature);
//console.log(‘e‘,e);
 
if(feature==undefined){
//隐藏气泡窗口
overlay.setPosition(undefined);
closer.blur();
}
var viewResolution = /** @type {number} */ (view.getResolution());
var url = wmsSource.getFeatureInfoUrl(
e.coordinate, viewResolution, ‘EPSG:4326‘,
{‘INFO_FORMAT‘: ‘application/json‘});
if (url) {
fetch(url)
.then(function (response) { return response.json(); })
.then(function (json) {
//document.getElementById(‘info‘).innerhtml = html;
console.log(‘json‘,json);
var coordinate = e.coordinate;
if(json.features.length>0){
var properties = json.features[0].properties;
var id = json.features[0].id;
var elements = ‘名称:‘+properties.estate_num+‘</br>备注:‘+properties.holder_nam;
elements += ‘<button type="button" id="deleteBtn">删除</button>‘;
content.innerHTML = elements;
overlay.setPosition(coordinate);
setTimeout(function () {
$("#deleteBtn").unbind("click");
$("#deleteBtn").click(function(){
console.log(‘删除按钮点击事件‘);
if(id)
{
deleteLayerRecord(id,callbackDeleteLayersWFSService);
}
});
}, 500)
}
});
}
 
})
 
/*图层删除记录
*@method deleteLayerRecord
*@param fid 记录fid值
*@return callback
*/
function deleteLayerRecord(fid, callback){
var xml = ‘<Transaction xmlns="http://www.opengis.net/wfs" service="WFS" version="1.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.opengis.net/wfs http://schemas.opengis.net/wfs/1.0.0/WFS-basic.xsd">‘;
……

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