java的spring-mongo设定返回字段

     BasicDBObject fieldsObject=new BasicDBObject();  
            #设定返回字段
    fieldsObject.put("name", true);    
    fieldsObject.put("sex", true);    
    fieldsObject.put("age", true);    

    #构建查询
    Query query = new BasicQuery(new BasicDBObject(), fieldsObject); 

           #设定查询的条件
    Criteria criteria = Criteria.where(TableMapData.Mongo.FIELD.CATEGORY).is(2);
    query.addCriteria(criteria);