我有以下有效的代码:
if (aDBCursor.hasNext()) {
DBObject aDbObject = aDBCursor.next();
aDbObject.put("title", "Test Title");
ArrayList<DBObject> department = new ArrayList<DBObject>();
DBObject nested1 = new BasicDBObject();
nested1.put("name", "Department A");
nested1.put("id", 1);
department.add(nested1);
DBObject nested2 = new BasicDBObject();
nested2.put("name", "Department B");
nested2.put("id", 2);
department.add(nested2);
aDbObject.put("department", department);
collection.save(aDbObject);
}
但是我在地图中拥有 A 部门和 B 部门的数据,如下所示:
Map<Object,Object> map = new HashMap<Object,Object>();
map.put("1", "Department A");
map.put("2", "Department B");
保存这些数据的最佳/最简单方法是什么?有没有办法将地图直接放入 mongo DB 中?或者我必须循环遍历地图吗?
已经进入地图的数据是从数据库中获取的,如下所示:
String[] values = req.getParameterValues("departments");
Map<Object,Object> map = new HashMap<Object,Object>();
DBCollection collection = database.getCollection("Departments");
BasicDBObject query = new BasicDBObject();
query.put("id", new BasicDBObject("$in", values));
DBCursor cursor = collection.find(query);
更好的是我可以将 DBCursor 对象放回到数据库中。
有任何想法吗?
感谢您的任何帮助或建议!