package com.ruoyi.device.uav.service; import com.alibaba.fastjson.JSON; import com.dtflys.forest.exceptions.ForestNetworkException; import com.dtflys.forest.exceptions.ForestRuntimeException; import com.fasterxml.jackson.core.JsonProcessingException; import com.fasterxml.jackson.databind.JsonMappingException; import com.fasterxml.jackson.databind.ObjectMapper; import com.ruoyi.common.core.redis.RedisCache; import com.ruoyi.common.utils.ConfigUtils; import com.ruoyi.common.utils.StringUtils; import com.ruoyi.device.uav.websocketclient.UAVWebsocketClient; import com.ruoyi.sy.controller.ArdSyCarController; import com.ruoyi.utils.forest.UavClient; import lombok.extern.slf4j.Slf4j; import okhttp3.*; import org.apache.commons.codec.binary.Base64; import org.apache.commons.collections4.map.HashedMap; import org.java_websocket.WebSocket; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.beans.factory.annotation.Value; import org.springframework.http.HttpMethod; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; import javax.annotation.PostConstruct; import javax.crypto.Cipher; import javax.crypto.spec.SecretKeySpec; import java.io.IOException; import java.lang.reflect.InvocationTargetException; import java.lang.reflect.Method; import java.net.URI; import java.net.URISyntaxException; import java.util.*; @Service @Slf4j(topic = "uav") public class UavService { /*uav: host: http://112.98.126.2:6100/ username: kaifabailu password: ardkj@2014 salt: 0123456789012345 */ private String username;//用户名 private String password;//密码 private String salt; //盐 private String host;//uav服务器11 private Map uavUser;//登录的用户信息 private ObjectMapper om = new ObjectMapper(); private Map UAVWebsocketClientMap = new HashedMap(); private String token; private String workspaceId; @Autowired private UavClient uavClient; @Autowired private RedisCache redisCache; @Value("${uav.enabled}") private Boolean uavEnabled; @PostConstruct public void created() { if(!uavEnabled){//无人机加入开关 return; } getUavConfig(); this.login(); //创建无人机Websocket客户端 createWebsocketCients(); } private void getUavConfig() { this.host = ConfigUtils.getConfigValue("uav_host"); this.username = ConfigUtils.getConfigValue("uav_username"); this.password = ConfigUtils.getConfigValue("uav_password"); this.salt = ConfigUtils.getConfigValue("uav_salt"); /*this.host = "http://112.98.126.2:6100/"; this.username = "znstest"; this.password = "znstest"; this.salt = "0123456789012345";*/ if (StringUtils.isEmpty(this.host) || StringUtils.isEmpty(this.username) || StringUtils.isEmpty(this.password) || StringUtils.isEmpty(this.salt)) { throw new RuntimeException("无人机参数配置缺失:"); } } public String doUavRequest(HttpMethod method, String url, String data) { getUavConfig(); String res = null; Method requestMethod = null; //获取method try { requestMethod = UavClient.class.getMethod(method.name(), String.class, String.class, String.class); } catch (NoSuchMethodException e) { e.printStackTrace(); } //执行method // this.getToken();//获取token验证,验证token有效性 try { String token = this.getToken(); res = (String) requestMethod.invoke(this.uavClient, this.host + url, token, data); } catch (IllegalAccessException e) { System.out.println("doUavRequest 访问失败"); System.out.println(url); log.error("doUavRequest 访问失败" + e.getMessage()); } catch (InvocationTargetException e) { System.out.println("doUavRequest 执行失败"); System.out.println(url); log.error("doUavRequest 执行失败" + e.getMessage()); e.printStackTrace(); } return res; } public Map getUavUser() { return redisCache.getCacheMap("uav:uavUser"); } public String getToken() { //获取uav用户信息 Map uavUser = redisCache.getCacheMap("uav:uavUser"); String token = (String) uavUser.get("access_token"); //验证token有效性 try { String res = uavClient.GET(this.host+"manage/api/v1/devices", token, "{}"); res+=""; //System.out.println(res); //token赋值 this.token = token; this.workspaceId = (String) uavUser.get("workspace_id"); } catch (ForestNetworkException fe) { if (fe.getStatusCode() == 401) {//token失效,重新登录 this.login(); //再次获取token uavUser = redisCache.getCacheMap("uav:uavUser"); token = (String) uavUser.get("access_token"); //token赋值 this.token = token; this.workspaceId = (String) uavUser.get("workspace_id"); return token; } } return token; } public void login() { getUavConfig(); log.debug("登录无人机外部接口"); String codedPassword = this.Encrypt(password, salt); String body = "{\"username\":\"" + username + "\",\"password\":\"" + codedPassword + "\"}"; log.debug("body:" + body); try { //uavClient.GET("logout", null, "{}"); String res = uavClient.POST(this.host+"login", null, body); Map resMap = om.readValue(res, Map.class); if (resMap != null&& resMap.get("data") instanceof Map) { redisCache.setCacheMap("uav:uavUser", (Map) resMap.get("data")); } } catch (ForestRuntimeException e) { log.error("无人机连接超时" + e.getMessage()); } catch (JsonMappingException e) { } catch (JsonProcessingException e) { } catch (IOException e) { } } public void createWebsocketCients(){ /*String ip = this.host.replace("http://", ""); if(this.UAVWebsocketClientMap.get("status") != null && this.UAVWebsocketClientMap.get("control") != null){ //无人机状态灭活 UAVWebsocketClient uavStatusWebsocketClient = this.UAVWebsocketClientMap.get("status"); uavStatusWebsocketClient.getHeartBeatTimer().cancel(); uavStatusWebsocketClient.close(); //无人机控制灭活 UAVWebsocketClient uavControlWebsocketClient = this.UAVWebsocketClientMap.get("control"); uavControlWebsocketClient.getHeartBeatTimer().cancel(); uavControlWebsocketClient.close(); this.UAVWebsocketClientMap.remove("status"); this.UAVWebsocketClientMap.remove("control"); } String uavStatusWsURL = "ws://" + ip + "api/v1/ws?x-auth-token=" + token; System.out.println(uavStatusWsURL); UAVWebsocketClient uavStatusWebsocketClient; try { uavStatusWebsocketClient = new UAVWebsocketClient(new URI(uavStatusWsURL)); uavStatusWebsocketClient.connect(); System.out.println("连接中。。。"); try { Thread.sleep(1000); } catch (InterruptedException e) { // TODO Auto-generated catch block e.printStackTrace(); } if(!uavStatusWebsocketClient.getReadyState().equals(WebSocket.READYSTATE.OPEN)){ uavStatusWebsocketClient.close(); return; } Date date = new Date(); Timer heartBeatTimer = new Timer(); TimerTask heartBeatTask = new TimerTask(){ public void run(){ Map para = new HashMap(); para.put("biz_code", "user_cmd"); para.put("version", "1.0"); Date date = new Date(); para.put("time_stamp", String.valueOf(date.getTime())); Map payload = new HashMap(); payload.put("timeStamp", String.valueOf(date.getTime())); Map data = new HashMap(); data.put("dataHead", "0x7479"); data.put("cmdCode", "0x02"); data.put("payload", payload); para.put("data", data); try{ uavStatusWebsocketClient.send(JSON.toJSONString(para)); System.out.println("无人机状态心跳发送"); }catch(Exception e){ e.printStackTrace(); System.out.println(uavStatusWebsocketClient.getServerUri()); } } }; uavStatusWebsocketClient.setHeartBeatTimer(heartBeatTimer); heartBeatTimer.scheduleAtFixedRate(heartBeatTask,date,10*1000); this.UAVWebsocketClientMap.put("status", uavStatusWebsocketClient); } catch (NumberFormatException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (URISyntaxException e) { // TODO Auto-generated catch block e.printStackTrace(); } String uavControlWsURL = "ws://" + ip + "api/v1/ws/cmd?x-auth-token=" + token; System.out.println(uavControlWsURL); UAVWebsocketClient uavControlWebsocketClient; try { uavControlWebsocketClient = new UAVWebsocketClient(new URI(uavControlWsURL)); uavControlWebsocketClient.connect(); System.out.println("连接中。。。"); try { Thread.sleep(1000); } catch (InterruptedException e) { // TODO Auto-generated catch block e.printStackTrace(); } if(!uavControlWebsocketClient.getReadyState().equals(WebSocket.READYSTATE.OPEN)){ //无人机状态灭活 UAVWebsocketClient uavStatusWebsocketClient0 = this.UAVWebsocketClientMap.get("status"); uavStatusWebsocketClient0.getHeartBeatTimer().cancel(); uavStatusWebsocketClient0.close(); uavControlWebsocketClient.close(); return; } Date date = new Date(); Timer heartBeatTimer = new Timer(); TimerTask heartBeatTask = new TimerTask(){ public void run(){ Map para = new HashMap(); para.put("biz_code", "user_cmd"); para.put("version", "1.0"); Date date = new Date(); para.put("time_stamp", String.valueOf(date.getTime())); Map payload = new HashMap(); payload.put("timeStamp", String.valueOf(date.getTime())); Map data = new HashMap(); data.put("dataHead", "0x7479"); data.put("cmdCode", "0x02"); data.put("payload", payload); para.put("data", data); try{ uavControlWebsocketClient.send(JSON.toJSONString(para)); System.out.println("无人机控制心跳发送"); }catch(Exception e){ e.printStackTrace(); System.out.println(uavControlWebsocketClient.getServerUri()); } } }; uavControlWebsocketClient.setHeartBeatTimer(heartBeatTimer); heartBeatTimer.scheduleAtFixedRate(heartBeatTask,date,10*1000); this.UAVWebsocketClientMap.put("control", uavControlWebsocketClient); } catch (NumberFormatException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (URISyntaxException e) { // TODO Auto-generated catch block e.printStackTrace(); }*/ String ip = this.host.replace("http://", ""); Date date = new Date(); Timer heartBeatTimer = new Timer(); TimerTask heartBeatTask = new TimerTask(){ public void run(){ if(token != null){//判断是否为null if(UAVWebsocketClientMap.get("status") != null && UAVWebsocketClientMap.get("control") != null){ String oldURL = UAVWebsocketClientMap.get("status").getServerUri().toString(); String oldToken = oldURL.split("x-auth-token=")[1]; if(!oldToken.equals(token)){//token更新从新创建客户端 //原客户端灭活 UAVWebsocketClientMap.get("status").close();//无人机状态灭活 UAVWebsocketClientMap.get("control").close();//无人机控制灭活 UAVWebsocketClientMap.remove("status"); UAVWebsocketClientMap.remove("control"); String uavStatusWsURL = "ws://" + ip + "api/v1/ws?x-auth-token=" + token; UAVWebsocketClient uavStatusWebsocketClient = null; try { uavStatusWebsocketClient = new UAVWebsocketClient(new URI(uavStatusWsURL)); uavStatusWebsocketClient.connect(); System.out.println("连接中。。。"); try { Thread.sleep(1000); } catch (InterruptedException e) { // TODO Auto-generated catch block e.printStackTrace(); } if(!uavStatusWebsocketClient.getReadyState().equals(WebSocket.READYSTATE.OPEN)){ uavStatusWebsocketClient.close(); uavStatusWebsocketClient = null; } } catch (NumberFormatException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (URISyntaxException e) { // TODO Auto-generated catch block e.printStackTrace(); } String uavControlWsURL = "ws://" + ip + "api/v1/ws/cmd?x-auth-token=" + token; UAVWebsocketClient uavControlWebsocketClient = null; try { uavControlWebsocketClient = new UAVWebsocketClient(new URI(uavControlWsURL)); uavControlWebsocketClient.connect(); System.out.println("连接中。。。"); try { Thread.sleep(1000); } catch (InterruptedException e) { // TODO Auto-generated catch block e.printStackTrace(); } if(!uavControlWebsocketClient.getReadyState().equals(WebSocket.READYSTATE.OPEN)){ //无人机状态灭活 UAVWebsocketClient uavStatusWebsocketClient0 = UAVWebsocketClientMap.get("status"); uavStatusWebsocketClient0.close(); uavControlWebsocketClient.close(); uavStatusWebsocketClient0 = null; uavControlWebsocketClient = null; //return; } } catch (NumberFormatException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (URISyntaxException e) { // TODO Auto-generated catch block e.printStackTrace(); } if(uavStatusWebsocketClient != null || uavControlWebsocketClient != null){ UAVWebsocketClientMap.put("status", uavStatusWebsocketClient); UAVWebsocketClientMap.put("control", uavControlWebsocketClient); Map para = new HashMap(); para.put("biz_code", "user_cmd"); para.put("version", "1.0"); Date date = new Date(); para.put("time_stamp", String.valueOf(date.getTime())); Map payload = new HashMap(); payload.put("timeStamp", String.valueOf(date.getTime())); Map data = new HashMap(); data.put("dataHead", "0x7479"); data.put("cmdCode", "0x02"); data.put("payload", payload); para.put("data", data); try{ uavStatusWebsocketClient.send(JSON.toJSONString(para)); uavControlWebsocketClient.send(JSON.toJSONString(para)); //System.out.println("无人机心跳发送"); }catch(Exception e){ e.printStackTrace(); System.out.println(uavStatusWebsocketClient.getServerUri()); System.out.println(uavControlWebsocketClient.getServerUri()); //无人机状态灭活 uavStatusWebsocketClient = UAVWebsocketClientMap.get("status"); uavStatusWebsocketClient.close(); //无人机控制灭活 uavControlWebsocketClient = UAVWebsocketClientMap.get("control"); uavControlWebsocketClient.close(); UAVWebsocketClientMap.remove("status"); UAVWebsocketClientMap.remove("control"); } } }else{ Map para = new HashMap(); para.put("biz_code", "user_cmd"); para.put("version", "1.0"); Date date = new Date(); para.put("time_stamp", String.valueOf(date.getTime())); Map payload = new HashMap(); payload.put("timeStamp", String.valueOf(date.getTime())); Map data = new HashMap(); data.put("dataHead", "0x7479"); data.put("cmdCode", "0x02"); data.put("payload", payload); para.put("data", data); UAVWebsocketClient uavStatusWebsocketClient = UAVWebsocketClientMap.get("status"); UAVWebsocketClient uavControlWebsocketClient = UAVWebsocketClientMap.get("control"); try{ uavStatusWebsocketClient.send(JSON.toJSONString(para)); uavControlWebsocketClient.send(JSON.toJSONString(para)); //System.out.println("无人机心跳发送"); }catch(Exception e){ e.printStackTrace(); System.out.println(uavStatusWebsocketClient.getServerUri()); System.out.println(uavControlWebsocketClient.getServerUri()); //无人机状态灭活 uavStatusWebsocketClient = UAVWebsocketClientMap.get("status"); uavStatusWebsocketClient.close(); //无人机控制灭活 uavControlWebsocketClient = UAVWebsocketClientMap.get("control"); uavControlWebsocketClient.close(); UAVWebsocketClientMap.remove("status"); UAVWebsocketClientMap.remove("control"); } } }else{ String uavStatusWsURL = "ws://" + ip + "api/v1/ws?x-auth-token=" + token; System.out.println(uavStatusWsURL); UAVWebsocketClient uavStatusWebsocketClient = null; try { uavStatusWebsocketClient = new UAVWebsocketClient(new URI(uavStatusWsURL)); uavStatusWebsocketClient.connect(); System.out.println("连接中。。。"); try { Thread.sleep(1000); } catch (InterruptedException e) { // TODO Auto-generated catch block e.printStackTrace(); } if(!uavStatusWebsocketClient.getReadyState().equals(WebSocket.READYSTATE.OPEN)){ uavStatusWebsocketClient.close(); uavStatusWebsocketClient = null; } } catch (NumberFormatException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (URISyntaxException e) { // TODO Auto-generated catch block e.printStackTrace(); } String uavControlWsURL = "ws://" + ip + "api/v1/ws/cmd?x-auth-token=" + token; System.out.println(uavControlWsURL); UAVWebsocketClient uavControlWebsocketClient = null; try { uavControlWebsocketClient = new UAVWebsocketClient(new URI(uavControlWsURL)); uavControlWebsocketClient.connect(); System.out.println("连接中。。。"); try { Thread.sleep(1000); } catch (InterruptedException e) { // TODO Auto-generated catch block e.printStackTrace(); } if(!uavControlWebsocketClient.getReadyState().equals(WebSocket.READYSTATE.OPEN)){ //无人机状态灭活 UAVWebsocketClient uavStatusWebsocketClient0 = UAVWebsocketClientMap.get("status"); uavStatusWebsocketClient0.close(); uavControlWebsocketClient.close(); uavStatusWebsocketClient0 = null; uavControlWebsocketClient = null; } } catch (NumberFormatException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (URISyntaxException e) { // TODO Auto-generated catch block e.printStackTrace(); } if(uavStatusWebsocketClient != null || uavControlWebsocketClient != null){ UAVWebsocketClientMap.put("status", uavStatusWebsocketClient); UAVWebsocketClientMap.put("control", uavControlWebsocketClient); Map para = new HashMap(); para.put("biz_code", "user_cmd"); para.put("version", "1.0"); Date date = new Date(); para.put("time_stamp", String.valueOf(date.getTime())); Map payload = new HashMap(); payload.put("timeStamp", String.valueOf(date.getTime())); Map data = new HashMap(); data.put("dataHead", "0x7479"); data.put("cmdCode", "0x02"); data.put("payload", payload); para.put("data", data); try{ uavStatusWebsocketClient.send(JSON.toJSONString(para)); uavControlWebsocketClient.send(JSON.toJSONString(para)); //System.out.println("无人机心跳发送"); }catch(Exception e){ e.printStackTrace(); System.out.println(uavStatusWebsocketClient.getServerUri()); System.out.println(uavControlWebsocketClient.getServerUri()); //无人机状态灭活 uavStatusWebsocketClient = UAVWebsocketClientMap.get("status"); uavStatusWebsocketClient.close(); //无人机控制灭活 uavControlWebsocketClient = UAVWebsocketClientMap.get("control"); uavControlWebsocketClient.close(); UAVWebsocketClientMap.remove("status"); UAVWebsocketClientMap.remove("control"); } } } } } }; heartBeatTimer.scheduleAtFixedRate(heartBeatTask,date,10*1000); } public String Encrypt(String sSrc, String sKey) { if (sKey == null) { return null; } // 判断Key是否为16位 if (sKey.length() != 16) { return null; } byte[] encrypted = null; try { byte[] raw = sKey.getBytes("utf-8"); SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES"); Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");//"算法/模式/补码方式" cipher.init(Cipher.ENCRYPT_MODE, skeySpec); encrypted = cipher.doFinal(sSrc.getBytes("utf-8")); } catch (Exception e) { e.printStackTrace(); } return new Base64().encodeToString(encrypted);//此处使用BASE64做转码功能,同时能起到2次加密的作用。 } public Object checkPointValid(String url, Map> data) { String token = this.getToken(); url = this.host + url; Map resultMap = checkPointValid(url,token, data); return resultMap; } public Map checkPointValid(String url,String access_token,Map> map){ MediaType mediaType = MediaType.parse("application/json; charset=utf-8"); OkHttpClient okHttpClient = new OkHttpClient(); RequestBody body = RequestBody.create(mediaType, JSON.toJSONString(map)); Request request = new Request.Builder().url(url).post(body).addHeader("x-auth-token",access_token).build(); Response response = null; try { response = okHttpClient.newCall(request).execute(); } catch (IOException e1) { // TODO Auto-generated catch block e1.printStackTrace(); } ResponseBody responseBody = response.body(); try { String message = responseBody.string();// 响应体 Map map0 = (Map) JSON.parse(message); return map0; } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); return new HashMap(); } } public Object checkLineValid(String url, Map>> data) { String token = this.getToken(); url = this.host + url; Map resultMap = checkLineValid(url,token, data); return resultMap; } public Map checkLineValid(String url,String access_token,Map>> map){ MediaType mediaType = MediaType.parse("application/json; charset=utf-8"); OkHttpClient okHttpClient = new OkHttpClient(); RequestBody body = RequestBody.create(mediaType, JSON.toJSONString(map)); Request request = new Request.Builder().url(url).post(body).addHeader("x-auth-token",access_token).build(); Response response = null; try { response = okHttpClient.newCall(request).execute(); } catch (IOException e1) { // TODO Auto-generated catch block e1.printStackTrace(); } ResponseBody responseBody = response.body(); try { String message = responseBody.string();// 响应体 Map map0 = (Map) JSON.parse(message); return map0; } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); return new HashMap(); } } public String getWorkspaceId(){ String token = this.getToken(); return this.workspaceId; } public Object addWaylinesPlanning(String url, Map data) { String token = this.getToken(); url = this.host + url; Map resultMap = addWaylinesPlanning(url,token, data); return resultMap; } public Map addWaylinesPlanning(String url,String access_token,Map map){ MediaType mediaType = MediaType.parse("application/json; charset=utf-8"); OkHttpClient okHttpClient = new OkHttpClient(); RequestBody body = RequestBody.create(mediaType, JSON.toJSONString(map)); Request request = new Request.Builder().url(url).post(body).addHeader("x-auth-token",access_token).build(); Response response = null; try { response = okHttpClient.newCall(request).execute(); } catch (IOException e1) { // TODO Auto-generated catch block e1.printStackTrace(); } ResponseBody responseBody = response.body(); try { String message = responseBody.string();// 响应体 Map map0 = (Map) JSON.parse(message); return map0; } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); return new HashMap(); } } public Object deleteWaylinesPlanning(String url, Map data) { String token = this.getToken(); String waylineId = data.get("waylineId"); url = this.host + url + waylineId; Map resultMap = deleteWaylinesPlanning(url,token); return resultMap; } public static Map deleteWaylinesPlanning(String url,String access_token){ OkHttpClient okHttpClient = new OkHttpClient(); Request request = new Request.Builder().url(url).delete().addHeader("x-auth-token",access_token).build(); Response response = null; try { response = okHttpClient.newCall(request).execute(); } catch (IOException e1) { // TODO Auto-generated catch block e1.printStackTrace(); } ResponseBody responseBody = response.body(); try { String message = responseBody.string();// 响应体 Map map0 = (Map) JSON.parse(message); return map0; } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); return new HashMap(); } } public Object updateWaylinesPlanning(String url, Map data) { String token = this.getToken(); url = this.host + url; Map resultMap = updateWaylinesPlanning(url,token, data); return resultMap; } public Map updateWaylinesPlanning(String url,String access_token,Map map){ MediaType mediaType = MediaType.parse("application/json; charset=utf-8"); OkHttpClient okHttpClient = new OkHttpClient(); RequestBody body = RequestBody.create(mediaType, JSON.toJSONString(map)); Request request = new Request.Builder().url(url).post(body).addHeader("x-auth-token",access_token).build(); Response response = null; try { response = okHttpClient.newCall(request).execute(); } catch (IOException e1) { // TODO Auto-generated catch block e1.printStackTrace(); } ResponseBody responseBody = response.body(); try { String message = responseBody.string();// 响应体 Map map0 = (Map) JSON.parse(message); return map0; } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); return new HashMap(); } } public Object addAlarm(String url, Map data) { String token = this.getToken(); url = this.host + url; data.put("userName",this.username); Map resultMap = addAlarm(url,token, data); return resultMap; } public Map addAlarm(String url,String access_token,Map map){ MediaType mediaType = MediaType.parse("application/json; charset=utf-8"); OkHttpClient okHttpClient = new OkHttpClient(); RequestBody body = RequestBody.create(mediaType, JSON.toJSONString(map)); Request request = new Request.Builder().url(url).post(body).addHeader("x-auth-token",access_token).build(); Response response = null; try { response = okHttpClient.newCall(request).execute(); } catch (IOException e1) { // TODO Auto-generated catch block e1.printStackTrace(); } ResponseBody responseBody = response.body(); try { String message = responseBody.string();// 响应体 Map map0 = (Map) JSON.parse(message); return map0; } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); return new HashMap(); } } }