ajax------Json

后台代码：

 

String result = "";
List<DeviceSensor> devices = deviceSensorService.findAll();
JSONArray array = new JSONArray();
for (DeviceSensor deviceSensor : devices) {
try {
	String apMac = deviceSensor.getApMac();
	if(apMac == null) continue;
	DeviceAp deviceAp = deviceApService.findByAddress(apMac);
	Map<String,Object> map = new HashMap<String, Object>();
	map.put("apmac", apMac);
	map.put("apx", deviceAp.getX());
	map.put("apy", deviceAp.getY());
	map.put("sensormac", deviceSensor.getMac());
	map.put("sensorx", deviceSensor.getX());
	map.put("sensory", deviceSensor.getY());
	array.add(map);
	
} catch (Exception e) {
}
}
result = array.toString();
try {
response.setContentType("application/json;charset-utf-8");
response.setContentLength(result.length());
response.setCharacterEncoding("utf-8");
response.getWriter().write(result);
response.getWriter().flush();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

 

　　

 

 返回Json数据格式

 

js代码：

 refresh();
 window.markers = [];
 window.markerList = new Array();
 window.label = new Array();
 function refresh(){
   $.ajax({
   type : "GET",
   dataType : "json",
   url : "${ctx}/link/ajax",
   success : function(data) {
	var arr=eval(data);
	for(var i = 0;i<arr.length;i++){
	if(arr[i].apy == null || arr[i].apx == null) continue;
	var station = new BMap.Point(arr[i].apx,arr[i].apy);  // 创建标注
	markerList[i] = new BMap.Marker(new BMap.Point(arr[i].sensorx,arr[i].sensory));  // 创建标注
	map.addOverlay(markerList[i]);
	markerList[i].setTitle(arr[i].sensormac);
	markers.push(markerList[i]);
	var points = [station,new BMap.Point(arr[i].sensorx,arr[i].sensory)];
	var curve = new BMapLib.CurveLine(points, {strokeColor:"blue", strokeWeight:3, strokeOpacity:0.5}); //创建弧线对象
	map.addOverlay(curve); //添加到地图中
	curve.enableEditing(); //开启编辑功能
	/*alert("apmac:"+arr[i].apmac+"\n"
	+"apx:"+arr[i].apx+"\n"
	+"apy:"+arr[i].apy+"\n"
	+"sensormac:"+arr[i].sensormac+"\n"
	+"sensorx:"+arr[i].sensorx+"\n"
	+"sensory:"+arr[i].sensory+"\n")*/
　　}
　　　　cluster();
　　},
　　error : function(XMLHttpRequest, textStatus, errorThrown) {
	alert(errorThrown);
　　}
});
		
		}