openlayer加载WMS图层例子（LAYERS对应值填的是name属性）
<!DOCTYPE html>
<html>
<head>
<title>Tiled WMS</title>
<link rel="stylesheet" href="https://openlayers.org/en/v4.0.1/css/ol.css" type="text/css">
<!-- The line below is only needed for old environments like Internet Explorer and Android 4.x -->
<script src="https://cdn.polyfill.io/v2/polyfill.min.js?features=requestAnimationFrame,Element.prototype.classList,URL"></script>
<script src="https://openlayers.org/en/v4.0.1/build/ol.js"></script>
</head>
<body>
<div id="map" class="map"></div>
<script>
var layers = [
new ol.layer.Tile({
source: new ol.source.XYZ({
url: 'http://t3.tianditu.com/DataServer?T=vec_c&x={x}&y={y}&l={z}',
projection:"EPSG:4326"
})
}),
new ol.layer.Tile({
//extent: [117.909832, 24.427347, 118.346327, 24.792678],
source: new ol.source.TileWMS({
url: 'http://192.168.202.63:6080/arcgis/services/XFZDFHDW/MapServer/WMSServer',
params: { 'LAYERS': '0', 'singleTile': true }
})
})
];
var map = new ol.Map({
layers: layers,
target: 'map',
view: new ol.View({
center: [118, 24.5],
zoom: 12,
projection: "EPSG:4326"
})
});
</script>
</body>
</html>转载自：https://blog.csdn.net/qq503690160/article/details/62036688
