hibernate for beginners

Hibernate dynamic multi-database, hibernate DatabaseRecently, the teacher gave me a task. The requirement is as follows:Server A has A table containing several server information. The table fields include: private int id; private String serverName; private String host; private String userName; private String passWord;We need to read the server information on database A to obtain data from th

Java interview-Hibernate summary, java interview-hibernate 1. Hibernate Retrieval Method Ø navigation object graph retrieval (navigation to other objects based on the loaded objects .) OID retrieval (the object is retrieved Based on the OID of the object .) Ø HQL search (using an object-oriented HQL Query Language .) Ø QBC retrieval (using QBC (Qurey By Criteria

Tutorial vulgar violence, with their own understanding of the elaboration of hibernate, suitable for small white, great God bypass. Also, it would be easier to understand if you have javaweb servlet programming experience. Not much nonsense, straight into the Hibernate framework Overview first, the concept of Popular Science framework: The framework is to encapsulate a large number of functions to call us,

In fact, Hibernate itself is an independent framework, which does not require any web server or application server support. However, most of the Hibernate beginners have added many non-Hibernate things, such as Tomcat, Eclipse, Log4J, Struts, XDoclet, and even JBoss. This can easily lead to a complicated and difficult

. The purpose of this article is to demonstrate the hibernate installation process as well as the most basic functions, so as to give beginners a low can not be lower entry threshold.Download FilesYou need the Java SDK, hibernate package, ant package, and JDBC Driver.1, Hibernate package download Address:Http://prdownl

Hibernate primary key generation policy and hibernate primary key policy Hibernate Primary Key Generation Policy 1. Automatic growth of identity Applicable to MySQL, DB2, and ms SQL Server. It uses the primary key generated by the database to generate unique identifiers for long, short, and int types.Use auto-increment fields of SQL Server and MySQL. This method

First, to recognize hibernateDisadvantages of 1.JDBC:1). Write code too cumbersome, try and catch more than 2). No data cache 3). Not object-oriented Programming 4). SQL statement fixed, portability poor Advantages of JDBC : efficiency is relatively high2.Hibernate Advantages1). Fully object-oriented programming 2). Hibernate cache is very cow, level cache, level two cache, query cache 3). Strong cross-pl

, array, operator, etc.), swing,awt, event mechanism, file input and output stream processing, etc.Difficulties: The understanding of object-oriented ideas (interfaces, classes, etc.), threading, socket network programming, etc.Video Tutorial recommended: Xinxin Sun Java Basic Video tutorial, Zhang Xiaoxiang Java Basic Video tutorial, speak very thin, and the two teachers have a good experience in teaching.J2ee:After learning the J2SE, you can try to slowly transition to the Java EE, of course,

Hibernate cache mechanism and hibernate Cache Mechanism I. why (why use Hibernate cache ?) Hibernate is a persistent layer framework that frequently accesses physical databases. To reduce the frequency of applications accessing physical data sources and improve the running performance of applications. Data in the cache