子系统联通状态bug修复

ibms-data-sdk/src/main/java/com/persagy/ibms/data/sdk/service/rest/RestUtil.java

@@ -292,9 +292,9 @@ public class RestUtil {
 			{
 				subsystem_connect_status_array.add(itemObject.toJSON(2));
 				Object connectName = itemObject.get("名称").value_prim.value;
-				String connectStatus = itemObject.get("连接状态").value_prim.value.toString();
+				Object connectStatus = itemObject.get("连接状态").value_prim.value;
 				sb.append("[" + connectName + "]");
-				if(connectStatus.equals("1"))
+				if(connectStatus!=null&&connectStatus.toString().equals("1"))
 				{
 					sb.append("[连接成功]");
 				}else
@@ -326,7 +326,7 @@ public class RestUtil {
 		} catch (Exception e) {
 			log.error(e.getMessage(), e);
 		}
-		return JSONArray.toJSONString(subsystem_connect_status_array);
+		return JSONArray.toJSONString(subsystem_connect_status_array,SerializerFeature.WriteMapNullValue);
 	}
 
 	//获取子系统配置