将max_allow_packet参数提取到配置文件中，不用每次从数据库中读取

src/main/java/com/nis/util/excel/thread/SaveAsnIpThread.java

@@ -175,10 +175,10 @@ public class SaveAsnIpThread implements Callable<Throwable>{
 		long start=System.currentTimeMillis();
 		int len=0;
 		List<AsnIpCfg> tempList=Lists.newArrayList();
-		Varibles maxPacket=asnIpCfgDao.getVaribles("max_allowed_packet");
+//		Varibles maxPacket=asnIpCfgDao.getVaribles("max_allowed_packet");
 		for(AsnIpCfg asnIpCfg:entitys) {
 			int tempLen=asnIpCfg.toString().getBytes(Charset.forName("UTF-8")).length;
-			if((len+tempLen)<maxPacket.getValue().longValue()) {
+			if((len+tempLen)<Constants.MAX_ALLOWED_PACKET) {
 				tempList.add(asnIpCfg);
 				len+=tempLen;
 			}else {