Vector Wfs Getfeature

<!--
  示例：OpenLayers WFS GetFeature 请求
  要点：WFS 格式器生成带过滤条件的 GetFeature XML，页面内按条件筛选响应
  依赖：OpenLayers 10.3.1 · jsDelivr CDN
-->
<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta name="robots" content="noindex,follow">
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>WFS GetFeature 请求</title>
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/ol@10.3.1/ol.css">
<style>
  html,body{height:100%;margin:0}
  body{display:flex;flex-direction:column;overflow:hidden;
       font:13px/1.6 -apple-system,"Segoe UI","PingFang SC",sans-serif}
  .bar{flex:0 0 auto;padding:8px 12px;background:#f6f7f9;border-bottom:1px solid #e3e6ea;
       display:flex;gap:10px;align-items:center;flex-wrap:wrap;font-size:12px;color:#58606e}
  .bar label{display:flex;gap:5px;align-items:center;cursor:pointer}
  .bar select,.bar input[type=range]{font-size:12px}
  .bar .val{font-family:ui-monospace,Consolas,monospace;color:#1f5fd0;min-width:44px}
  .bar .sep{width:1px;height:16px;background:#d8dce2}
  #map{flex:1 1 auto;min-height:0;background:#eef0f3}
  .panels{flex:1 1 auto;min-height:0;display:grid;grid-template-columns:340px 1fr;gap:1px;background:#ccd3db}
  .request{margin:0;padding:10px;overflow:auto;background:#1d2530;color:#d6e2ee;
           font:11px/1.55 ui-monospace,Consolas,monospace;white-space:pre-wrap}
  #map{min-height:0;background:#eef0f3}
</style>
</head>
<body>
<div class="bar">
  <label>名称前缀 <input id="prefix" value="永定" size="6"></label>
  <button id="send" type="button">发送请求</button>
  <span class="sep"></span>
  <span id="info">等待发送</span>
</div>
<div class="panels">
  <pre id="request" class="request"></pre>
  <div id="map"></div>
</div>
<script src="https://cdn.jsdelivr.net/npm/ol@10.3.1/dist/ol.js"></script>
<script>
(function () {
  'use strict';

  if (typeof ol === 'undefined') {
    document.getElementById('map').textContent = 'OpenLayers 加载失败，请检查能否访问 cdn.jsdelivr.net';
    return;
  }


  var waters = [
    {name: '永定河', waterway: 'river', ring: [[116.20, 39.90], [116.24, 39.92], [116.27, 39.90], [116.30, 39.88]]},
    {name: '永定新河', waterway: 'river', ring: [[116.30, 39.88], [116.35, 39.86], [116.40, 39.85], [116.45, 39.84]]},
    {name: '潮白河', waterway: 'river', ring: [[116.60, 40.00], [116.65, 39.95], [116.70, 39.90], [116.75, 39.85]]},
    {name: '温榆河', waterway: 'river', ring: [[116.45, 40.05], [116.50, 40.02], [116.55, 39.98], [116.58, 39.95]]},
    {name: '昆明湖', waterway: 'lake', ring: [[116.255, 39.985], [116.285, 39.985], [116.285, 40.005], [116.255, 40.005]]}
  ];

  var vectorSource = new ol.source.Vector();
  var vector = new ol.layer.Vector({
    source: vectorSource,
    style: new ol.style.Style({
      stroke: new ol.style.Stroke({color: 'rgba(21, 101, 192, 0.95)', width: 3}),
      fill: new ol.style.Fill({color: 'rgba(21, 101, 192, 0.15)'})
    })
  });

  var map = new ol.Map({
    target: 'map',
    layers: [
      new ol.layer.Tile({source: new ol.source.XYZ({url: 'https://server.arcgisonline.com/ArcGIS/rest/services/World_Street_Map/MapServer/tile/{z}/{y}/{x}', attributions: 'Tiles © Esri'}), opacity: 0.6}),
      vector
    ],
    view: new ol.View({
      center: ol.proj.fromLonLat([116.42, 39.93]),
      zoom: 11
    })
  });

  function sendRequest() {
    var prefix = document.getElementById('prefix').value || '永定';

    var request = new ol.format.WFS().writeGetFeature({
      srsName: 'EPSG:3857',
      featureNS: 'http://demo.local/water',
      featurePrefix: 'demo',
      featureTypes: ['water'],
      outputFormat: 'application/json',
      filter: ol.format.filter.and(
        ol.format.filter.like('name', prefix + '*'),
        ol.format.filter.equalTo('waterway', 'river')
      )
    });

    var xml = new XMLSerializer().serializeToString(request);
    document.getElementById('request').textContent = xml;

    var matches = waters.filter(function (water) {
      return water.waterway === 'river' && water.name.indexOf(prefix) === 0;
    });

    var features = matches.map(function (water) {
      return new ol.Feature({
        geometry: new ol.geom.LineString(water.ring.map(function (p) {
          return ol.proj.fromLonLat(p);
        })),
        name: water.name,
        waterway: water.waterway
      });
    });

    vectorSource.clear();
    vectorSource.addFeatures(features);
    document.getElementById('info').textContent =
      '命中 ' + features.length + ' 条河流';

    if (features.length) {
      map.getView().fit(vectorSource.getExtent(), {padding: [60, 60, 60, 60]});
    }
  }

  document.getElementById('send').addEventListener('click', sendRequest);
  document.getElementById('prefix').addEventListener('keydown', function (evt) {
    if (evt.key === 'Enter') {
      sendRequest();
    }
  });

})();
</script>
</body>
</html>