Common Code block templates, get and load differences, session. Get (,) parameter explanations, session method summary

 Steps for setting the template code: WINDOW> JAVA> templates> New
Template code 
 session =  hibernateutils. opensession ();   try  { hibernateutils. starttransaction ();  /**   * Specific Business Code   */  hibernateutils. committransaction () ;}  catch   (exception e) {hibernateutils. rollbacktransaction ();   throw   New   runtimeexception (e) ;}< br> =================================================== =============< br> 

Difference between hibernate get and Load

 
The fundamental difference between get and load. In a word, Hibernate considers the load method to exist in the database,
You can safely use a proxy to delay loading. If a problem is found during use, you can only throw an exception. For the get method,
Hibernate must obtain real data; otherwise, null is returned.
 

 
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Session. Get (,) parameter explanation
 

 
Session. Get (user.Class, 2)// Search for data with ID = 2 in the user object
 

 

 
First parameter: object type to be searched
Second parameter: Corresponding id Primary Key
 

 
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Session method summary
 

 1   Session. Save (Object object); added  2  Session. Update (Object object); Modify  3   Session. saveorupdate (Object object); Modify if the primary key field has a value, and add if no value exists.  4   Session. Update (Object object );  5   Session. Delete (Object object); Delete  6   Session. createquery (string hql); query by hql statement  7   Session. createcriteria (class entityclass); Queries QBC by entity  8   Session. Load (class entityclass, serialize ID); query by ID to delay loading. 9 Session. Get (class entityclass, serialize ID); query by ID and load immediately.