java - 如何根据id查找该对象字段的值 而不是查找对象全部信息？

Question

mysql可以指定select 后面的字段

mongo 通过java 怎么实现该功能 比如我要根据c_oid得到c_title java代码怎么写？

Answer 1

It’s just a normal query, please refer to the official documentation.

Answer 2

It’s very detailed here
http://mongodb.github.io/mong...

For example, fields include below contains the fields you want to return

collection.find(eq("c_oid", "****"))
                .projection(fields(include("c_title"), excludeId()));