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This article mainly explains the "MyBatis how to introduce array collection classes and use foreach traversal", the article explains the content is simple and clear, easy to learn and understand, the following please follow the editor's ideas slowly in depth, together to study and learn "how MyBatis into array collection classes and use foreach traversal" bar!

Pass in an array or collection class in mapper and use the foreach tag to traverse the values in it and concatenate the SQL statement

JAVA dao layer interface

Public interface UserDao {public List getUsersByCollection (Collection collection);}

Mapper file

Select * from users where id in # {id}

test

@ Testpublic void getUsersByCollection () {Collection collection = new ArrayList (); collection.add (1); collection.add (3); collection.add (5); List users = userDao.getUsersByCollection (collection); System.out.println (users);}

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