From：http://liushaobo2005.blog.163.com/blog/static/253056702011541462372/
wfs是OGC的标准规范，主要用于提供对矢量地理数据的服务，我们以一个对摄像头图层进行操作为例了解如何通过openlayer+geoserver实现WFS操作。
首先利用postgis建表camera，参照http://postgis.refractions.net/docs/ch04.html
接着在geoserver中创建相关图层camera，数据来源为刚建立的postgis表
修改geoserver的WFS service配置，将Service Level改为Transactional，实现事物级的操作。
此时我们已经完成了服务器端的配置，接着通过openlayer来实现对WFS服务的调用。
wfs-protocol-transactions.js
//定义DeleteFeature类
var DeleteFeature = OpenLayers.Class(OpenLayers.Control, {
initialize: function(layer, options) {
OpenLayers.Control.prototype.initialize.apply(this, [options]);
this.layer = layer;
this.handler = new OpenLayers.Handler.Feature(
this, layer, {click: this.clickFeature}
);
},
clickFeature: function(feature) {
// if feature doesn't have a fid, destroy it
if(feature.fid == undefined) {
this.layer.destroyFeatures([feature]);
} else {
feature.state = OpenLayers.State.DELETE;
this.layer.events.triggerEvent("afterfeaturemodified",
{feature: feature});
feature.renderIntent = "select";
this.layer.drawFeature(feature);
}
},
setMap: function(map) {
this.handler.setMap(map);
OpenLayers.Control.prototype.setMap.apply(this, arguments);
},
CLASS_NAME: "OpenLayers.Control.DeleteFeature"
});
function init() {
var mapOptions = {
resolutions: [],
projection: new OpenLayers.Projection('EPSG:900913'),
maxExtent: new OpenLayers.Bounds(1.2636720449E7,2510310.336,1.2787005936E7,2660595.8230000017),
units: "meters",
controls: []
};
map = new OpenLayers.Map('map', mapOptions );
var wms = new OpenLayers.Layer.WMS(
"szroad","http://yourgeoserver:8088/geoserver/gwc/service/wms",
{layers: 'szroad', format: 'image/png' },
{ tileSize: new OpenLayers.Size(256,256) }
);
var saveStrategy = new OpenLayers.Strategy.Save();
wfs = new OpenLayers.Layer.Vector("Editable Features", {
strategies: [new OpenLayers.Strategy.BBOX(), saveStrategy],
projection: new OpenLayers.Projection("EPSG:900913"),
protocol: new OpenLayers.Protocol.WFS({
version: "1.1.0",
srsName: "EPSG:900913",
url: "http://yourgeoserver:8088/geoserver/wfs",
featureType: "camera",
featureNS: "http://yourgeoserver:8088/szglj",
featurePrefix:"szglj",
geometryName: "the_geom"
})
});
map.addLayers([wms, wfs]);
var panel = new OpenLayers.Control.Panel(
{'displayClass': 'customEditingToolbar'}
);
var navigate = new OpenLayers.Control.Navigation({
title: "Pan Map"
});
var drawCamera = new OpenLayers.Control.DrawFeature(
wfs, OpenLayers.Handler.Point,
{
title: "Draw Feature",
displayClass: "olControlDrawFeaturePoint"
}
);
drawCamera.featureAdded = function(feature) {
feature.attributes ={"code":"100000001","name":"一号摄像头"};
}
var editCamera = new OpenLayers.Control.ModifyFeature(wfs, {
title: "Modify Feature",
displayClass: "olControlModifyFeature"
});
var delCamera = new DeleteFeature(wfs, {title: "Delete Feature"});
var saveCamera = new OpenLayers.Control.Button({
title: "Save Changes",
trigger: function() {
if(editCamera.feature) {
editCamera.selectControl.unselectAll();
}
saveStrategy.save();
},
displayClass: "olControlSaveFeatures"
});
panel.addControls([navigate, saveCamera, delCamera, editCamera, drawCamera]);
panel.defaultControl = navigate;
map.addControl(panel);
map.zoomTo(3);
}
wfs-protocol-transactions.html
<html>
<head>
<link rel="stylesheet" href="http://liushaobo2005.blog.163.com/blog/../theme/default/style.css" type="text/css" />
<link rel="stylesheet" href="http://liushaobo2005.blog.163.com/blog/style.css" type="text/css" />
<script. src="http://liushaobo2005.blog.163.com/blog/../lib/OpenLayers.js"></script>
<style>
.customEditingToolbar {
float: right;
right: 0px;
height: 30px;
width: 200px;
}
.customEditingToolbar div {
float: right;
margin: 5px;
width: 24px;
height: 24px;
} .olControlNavigationItemActive {
background-image: url("../theme/default/img/editing_tool_bar.png");
background-repeat: no-repeat;
background-position: -103px -23px;
}
.olControlNavigationItemInactive {
background-image: url("../theme/default/img/editing_tool_bar.png");
background-repeat: no-repeat;
background-position: -103px -0px;
}
.olControlDrawFeaturePointItemInactive {
background-image: url("../theme/default/img/editing_tool_bar.png");
background-repeat: no-repeat;
background-position: -77px -0px;
}
.olControlDrawFeaturePointItemActive {
background-image: url("../theme/default/img/editing_tool_bar.png");
background-repeat: no-repeat;
background-position: -77px -23px ;
}
.olControlModifyFeatureItemActive {
background-image: url(../theme/default/img/move_feature_on.png);
background-repeat: no-repeat;
background-position: 0px 1px;
}
.olControlModifyFeatureItemInactive {
background-image: url(../theme/default/img/move_feature_off.png);
background-repeat: no-repeat;
background-position: 0px 1px;
}
.olControlDeleteFeatureItemActive {
background-image: url(../theme/default/img/remove_point_on.png);
background-repeat: no-repeat;
background-position: 0px 1px;
}
.olControlDeleteFeatureItemInactive {
background-image: url(../theme/default/img/remove_point_off.png);
background-repeat: no-repeat;
background-position: 0px 1px;
} </style>
<script. src="http://liushaobo2005.blog.163.com/blog/wfs-protocol-transactions.js"></script>
</head>
<body nload="init()">
<div id="map" style="width:100%;height:100%"></div>
</body>
</html>
注意：
1.openlayer中WFS layer的featureNS为geoserver中编辑的矢量图层的workspace 的Namespace URI。
2.提交wfs服务时js存在跨域问题，所以必须保证地图web server和WFS服务器在同一域环境下。