osgi persistence.xml读取database.properties文件属性

database.properties

　　user=sa

　　password=root

　　...

persistence.xml

　　

<?xml version="1.0" encoding="UTF-8"?>

<persistence

xmlns="http://java.sun.com/xml/ns/persistence" version="1.0">

　　<persistence-unit name="test" transaction-type="RESOURCE_LOCAL">

　　　　<properties>

　　　　</properties>

　　</persistence-unit>

</persistence>

 

代码:

 

public class Connection{

....

Bundle thisBundle = FrameworkUtil.getBundle(Connection.class);

BundleContext context = thisBundle.getBundleContext();

ServiceReference<PersistenceProvider> serviceReference = (ServiceReference<PersistenceProvider>) context.getServiceReference(PersistenceProvider.class.getName());

 

Properties properties = new Properties();

File file = new File("cfg/database.properties");

InputStream in = new FileInputStream(file);

properties.load(in);

String user = properties.getProperty("user");

Map<String,String> map = new HashMap<String,String>();

map.put("hibernate.connection.username", user);

.....

//通过map设置属性值

 

context.getService(serviceReference).createEntityManagerFactory("test", map);

}

...