1 //参数字段  
 2     var wfsParams = {    
 3             service : ‘WFS‘,    
 4             version : ‘1.0.0‘,    
 5             request : ‘GetFeature‘,    
 6             typeName : ‘cite:bou2_4p‘,  //图层名称     
 7             outputFormat : ‘text/javascript‘,  //重点，不要改变  
 8             format_options : ‘callback:loadFeatures‘  //回调函数声明  
 9         };    
10       
11      var vectorSource = new ol.source.Vector({    
12          format: new ol.format.GeoJSON(),    
13          loader: function(extent, resolution, projection) {  //加载函数  
14              var url = ‘http://localhost:8080/geoserver/wfs‘;    
15              $.ajax({    
16                  url: url,    
17                  data : $.param(wfsParams),   //传参  
18                  type : ‘GET‘,    
19                  dataType: ‘jsonp‘,   //解决跨域的关键  
20                  jsonpCallback:‘loadFeatures‘  //回调  
21                      
22              });    
23          },    
24          strategy: ol.loadingstrategy.tile(new ol.tilegrid.createXYZ({    
25              maxZoom: 25    
26          })),    
27          projection: ‘EPSG:4326‘    
28      });    
29       //回调函数使用  
30      window.loadFeatures = function(response) {    
31          vectorSource.addFeatures((new ol.format.GeoJSON()).readFeatures(response));  //载入要素  
32              
33      };    
34      var vectorLayer = new ol.layer.Vector({    
35          source: vectorSource  
36      });