任何机构知道如何使用数据存储游标与JPA？
Answer 1:
你可以试试这个（改编自JDO样本 ）：
List<Employee> results = (List<Employee>) query.execute();
// Use the first 20 results...
Cursor cursor = JPACursorHelper.getCursor(results);
String cursorString = cursor.toWebSafeString();
// Store the cursorString...
// ...
// Query query = the same query that produced the cursor
// String cursorString = the string from storage
Cursor cursor = Cursor.fromWebSafeString(cursorString);
query.setHint(JPACursorHelper.CURSOR_HINT, cursor);
query.setFirstResult(0);
query.setMaxResults(20);
List<Employee> results = (List<Employee>) query.execute();
// Use the next 20 results...
文章来源: How to use datastore cursors with jpa on GAE
