Search methods of HQL and QBC

Detailed concept on PPT:

1.HQL

(1) Query interface

• Object Uniqueresult (), which returns a unique instance of the match condition, or null if none.

2.QBC (Criteria interface, criterion interface, expression class < So the set conditions are within this method >)

(1) Create in session

• Criteria Createcriteria (class Class) Persistence class name

(2) Criteria interface

• Object Uniqueresult ()
• List List ()
• Criterion Add (Criterion Criterion) adds some restrictions to query results

(3) Criterion interface, by restictions (Implementation Class), internal is static method

(4) Criteria

• AddOrder (order order) sort

(5) Static Order ASC (String name)

Static Order Desc (String PropertyName)

Search methods of HQL and QBC