mongodb java 经常使用操做

1、查询

//1.不等于
DBObject notQuery = new BasicDBObject().append(QueryOperators.NE, "词赋曲令");
DBObject query = new BasicDBObject().append("type",notQuery);

//2.或者
BasicDBObject queryCondition = new BasicDBObject();  
BasicDBList values = new BasicDBList();  
values.add(new BasicDBObject("status", "1"));  
values.add(new BasicDBObject("status", "2"));  
queryCondition.put("md5", MD5Util.encode(countryUrl));
queryCondition.put("$or", values); 
if(countryMd5Collection.count(queryCondition)>0){
	continue;
}