spring data jpa example

EJB is the Sun's Java EE server-side component model, and the design goal and core application is to deploy distributed applications. With the advantages of Java cross-platform, distributed systems deployed with EJB technology can be limited to specific platforms. EJB (Enterprise JavaBean) is part of the Java EE, which defines a standard for developing component-based enterprise multi-application applications. Features include network service support and core development tools (SDKs). In Java EE

Using the underlying API: RedisConnection operation of Redis requires manual conversion of data ( String ), which requires most repetitive work and is inefficient; org.springframework.data.redis.core.RedisTemplate classes provide a high level of abstraction for interacting with Redis, which is responsible for serialization and connection management, encapsulating most of the repetitive work. And RedisTemplate is a thread-safe class.In addition, the t

Hibernate 3.2 supports JPA annotations, and spring integration JPA is optional. The following is an example of the spring integration JPA. Entity class MyUser, using JPA annotations t

, and its own modification: optimistic, the meaning of the representative is that most of the scenarios are consistent version. But from the business point of view and ensure strict consistency of data, avoid dirty reading and other issues, the use of the scene needs to be considered. Remember the previous blog simple introduction of the concept of row-level lock, in fact, and optimistic lock is to want to the database level plus lock control concurre

Although JPA development is mostly done with the hibernate specification, there is a significant difference between the one and spring integration, and first look at the important configuration of spring's consolidated JPASee here to believe that I do not need to explain more people should be able to understand, if you use this way to pay attention to SRC must exist under the Meta-inf folder and the followi

Using the underlying API: RedisConnectionFactory and RedisConnection You can manipulate Redis directly, here's a simple example:# # Maven DependencyConfigure Redis.propertiesredis.host=127.0.0.1redis.port=6379Configure Spring-data-redis.xmlOperating Redispublic static void main( String[] args ){ ApplicationContext context = new ClassPathXmlApplicationContext("

Example Description In the example, we'll learn how to page through the user's comments. Join Spring Data Introducing Jar Packs Join spring data to introduce in POM configuration in the root context @Configuration @EnableAsy

Mapping of entity Although in front, we gave the table. But the book recommended that we first design the code, and then according to the code to design the database, user requirements-"code design-" Database design. But I think big projects might not be like that. mapping of classes and data Indicates that this is @javax. Persistence.entity, the name of the default Entity is the class name, which, if necessary, can be done by using the name paramet

Usage scenario: Using @query ("HQL statement") under Spring data JPAAnd then you get an error when the project starts.HQL statement error: ANTLR. Noviablealtexception:unexpected Token:rolenameTake a closer look at the code: @Query(Value= " fromRole asR Left JoinR.department asD Left JoinD.company asCwhere"+"(:d epartmentid is NULL orD.id=:d Epartmentid) "+ " and(: CompanyID is NULL orC.id=: C

JPA Single Data Source configuration:Http://doc.okbase.net/liuyitian/archive/109276.htmlJPA Multi-Data source configuration:Http://www.blogjava.net/weir/archive/2015/01/08/422132.htmlJPA does not configure the 2 solution for each entity class in the Persistence.xml fileHttp://www.cnblogs.com/taven/archive/2013/10/04/3351841.htmlSPRING+

. data. repository. crudrepository; import COM. kfit. test. bean. demo;/** the crud method is commonly used in crudrepository. * Such a basic Dao is finished. */public interface demorepository extends crudrepository The method for saving data here is complete. The crudrepository class defines and implements some common methods. Now you can introduce the call in other classes. In addition, repository is th

Repository { Optional FindByID (ID ID); extends T> S Save (S entity);} Interface extends Mybaserepository { User findbyemailaddress (EmailAddress emailaddress);}View CodeIn the first step, a common basic interface is defined for all the domain repositories, and the FindByID (...) is exposed. ) and save (...). ）。 These methods will be routed to the underlying repository implementation of the store that spring