spring jpa hibernate ddl auto

Spring 4 + jpa (hibernate 3/4) + spring mvc multi-data source configuration (2) + Druid connection pool, mvcdruid Pick up a blog post (http://www.loveweir.com/html/18.html), no database connection pool, purely using the official link of jpa. Therefore, we need to add the con

Next to a blog post, there is no database connection pool, purely with the official JPA link. So this time we're going to add a connection pool. This article uses Druid Connection pool to implement multi-data source configuration. Persistence.xml This file can be omitted, all configured in Applicationcontext.xml: other places do not need to be changed by the last configuration. That's good. reprinted from: Http://www.loveweir.com/html/19.htmlSpring

It is convenient to save query data using JPA, in addition to adding data to your code, you can import using SQL. At the moment I only have a way to centralize the data in a single SQL file.and data in the import often has a succession of relations, need to be imported in a serial way.First step: Configure the configuration that requires the spring boot to have create for the data to load the SQL file autom

(Exception e) {//TODO auto-generated Catch blockE.printstacktrace (); Em.gettransaction (). rollback (); //Transaction Rollback}finally{em.close ();//Close em}} @Test Public voidTestdelete () {Entitymanager em=Factory.createentitymanager (); User User= Em.find (User.class, 1);//Query to entityem.gettransaction (). Begin ();//Transaction Open Try{em.remove (user); //Delete EntityEm.gettransaction (). commit ();//Transaction Commit}Catch(Exceptio

Hibernate search I will not say more, it is based on Lucene full-text Search tool, remember when the university contacted the Compass full-text Search tool, and then did not use, and then later this guy does not update, So hibernate has launched its own lucene-based full-text Search tool which is the guy hibernate search. Needless to say that the natural advantag

record ID is the action that the request parameters passed to flow, The action calls the service layer and then calls the DAO layer to load the specific information of this record), error:Org.hibernate.LazyInitializationException:could not InitialiThe DAO layer is the Jparepository class that inherits spring, calls the GetOne method when loading, and views the GetOne Javadoc,see Also:EntityManager.getReference (class, Object)The object is lazy-loaded

Org.hibernate.boot.model.naming.PhysicalNamingStrategyStandardImplforPhysicalnamingstrategystandardimplhave aDefaultnamingstrategythe effect, forSpringphysicalnamingstrategyhave aImprovednamingstrategythe effect. After looking at these two classes of source code, found that the above thinking is still possible the following is my CodeImport Org.hibernate.boot.model.naming.identifier;importOrg.hibernate.boot.model.naming.physicalnamingstrategystandardimpl;import Org.hibernate.engine.jdbc.env.spi

Recently, we are interested in the JPA implementations of Hibernate, which are documented in the configuration method.First, MAVEN relies on package configuration, where spring3.1.2 and hibernate3.6.0 are used.The is then the spring configuration Applicationcontext.xml, it is important to note that the data source here is Jndi, which is recommended in a producti

Spring and hibernate integrate automatic scanning trapsThe spring 2.5.6 automatic package scanning (Packagestoscan) feature is used when configuring Hibernate+spring.This feature automatically scans the entity classes in the package to avoid the hassle of writing annotatedclasses. But when I use this feature, I've been