How to use Easy Java Persistence 3.5
This article mainly introduces "how to use Easy Java Persistence 3.5". In daily operation, I believe many people have doubts about how to use Easy Java Persistence 3.5. the editor consulted all kinds of materials and sorted out simple and easy-to-use methods of operation. I hope it will be helpful for you to answer the doubts about "how to use Easy Java Persistence 3.5". Next, please follow the editor to study!
EJP is a powerful and easy-to-use relational database persistence Java API. The main features of EJP include:
1. Object / Relational (object/relational) automatic Mapping (A-O/RM)
2. Automatically handle all associations
3. Automatic persistence tracking
EJP does not require mapping annotations or XML configuration, and does not need to inherit any classes or implement any interfaces. EJP uses only the Plain Old Java Objects (POJOs) object. EJP is by far the simplest persistence API in Java open source.
Sample code:
Public static void main (String [] args) {DatabaseManager dbm = DatabaseManager.getDatabaseManager (...); dbm.saveObject (new Customer ("Smith", "John")); Customer customer; if ((customer = dbm.loadObject (new Customer ("Smith"))! = null) {customer.getSupport () .add (new Support (...)) Dbm.saveObject (customer);} Collection list = new ArrayList (); list = dbm.loadObjects (list, Customer.class);...}
The main contents of this update are:
◆ This release fixes all known issues.
◆ All functionality/features have been thoroughly tested on every major database platform (Oracle, DB2, PostgreSql, Mysql, SQL Server, HSQL, H2, and Derby).
◆ supports Blog and Transaction
◆ supports stored procedures
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