spring jpa tutorial

Check the Persistence.xml.unit name="***" transaction-type="RESOURCE_LOCAL">Note that we did not find the persistence unit we declared.The line:vider>org.hibernate.ejb.HibernatePersistenceDoes not exist in the system and needs to go to hibernate websiteHttp://hibernate.org/30.htmlDownload Hibernate entitymanager Import into the projectNote:Hibernate 3.2 and later releases support JPA, with three sub-projects involving

First, the environment1. This essay is based on the spring data JPA project2. Database for MySQL version 5.7.9Second, the content1. Create a new stored procedure Pro_query_objectBEGIN#Routine body goes here...a_theme_code varchar (), out Num intSelect o.obj_code,o.obj_name,o.obj_id from Qt_object o where O.theme_code=a_theme_code;Select COUNT (*) into num from Qt_object o where O.theme_code=a_theme_code GRO

In standard JPA, the persistence unit is defined by default in the Meta-inf/persistence.xml file and is obtained through the @entity annotation search. However, in most cases, the persistence unit will not only have one, and the data source will not be one, for this reason, Spring provides an optional solution, This is managed through Localentitymanagerfactorybean and Localcontainerentitymanagerfactorybean.

The domestic article looked again, actually did not find the fundamental problem solution, the following will enumerate this series of problem solving method: 1. Add the following configuration in the configuration file: spring.jpa.hibernate.naming.physical- strategy=org.hibernate.boot.model.naming.PhysicalNamingStrategyStandardImpl 2. Add the following annotations on the entities and attributes, respectively: // Table Name @Table("\"User\"") // field @Column("\"Name\"") Solve f

Spring Data JPA supports annotated read-write locks (pessimistic locks), which are actually hard-coded, but SQL based on JPA naming can only add support for read-write locks with annotations.No, you can read and write the lock here.MySQL read-write lock and transactionand recommendPessimistic_read,Pessimistic_write,Instead ofREAD,WRITE,But the official documents

It's been a long time to have a problem today, record it here.After all, it is just beginning to use the JPA technology, always encountering various configuration problems.Using the spring Data JPA is very handy, and some simple operations do not have to write a specific implementation.Just write an interface to inherit jparepository , and note that you need to h

Tags: EPO query class ace Autowire integer ROM useMore convenient to use than using JDBCTEMPLATE,SPRING-DATA-JPA.1. First UserService inherit Jparepository Public Interface extends Jparepository { User findbyname (String name); User findbynameandage (String name, Integer age); @Query ("from user U where U.name=:name") User finduser (@Param ("name") String name);2. Direct use of @autowired automa

See-----> 791,312,811 in the original. Method 11. Controller layer:The method parameter is as follows, must add "%" +name+ "% "/**@description : Cheng Zhixiang com 2018/1/22 pm 5:15V1.0 */@RestControllerpublic Class Usercontroller { @Autowired private teamrepository teamrepository; @GetMapping ("/findbynamelike") public list2. DAO Layer:Be sure to use the JPA-defined form findby+ parameter name +like (parameter)/** data layer

: Network Disk Download1. Spring Data repositories Spring data repository is used to free you from a large number of repetitive, complex database-level operations. 1.1 Core Concepts The core interface of Spring Data repository is repository (it seems to be nothing to be surprised). This interface requires the domain class with the ID type of the domain class as t

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=: CompanyID) "+ " and(: RoleName is

Example code:/** * If the barcode field value is NULL then do not process * If the barcode field value is not null before the original value of the Mosaic del:@param dealer @return * /@Modifying @Transactional @Query ("update Dealer D set "+ " D.deleteflag = 1, "+ " D.barcode = case when D.barcode was NULL then D.barcode ELSE CONCAT (' d El: ', D.barcode) end, "+ " D.outerid = case when D.outerid was NULL then D.outerid ELSE CONCAT ('

1. The integrated configuration file is as followsSpring Integrated Redis - BeanID= "Poolconfig"class= "Redis.clients.jedis.JedisPoolConfig"> Propertyname= "Maxtotal"value= "+"/> Bean> Configuring Jedisconnectionfactorybean Objects - BeanID= "Jedisconnectionfactory"class= "Org.springframework.data.redis.connection.jedis.JedisConnectionFactory"> Propertyname= "HostName"value= "localhost"/> Propertyname= "Port"value= "6379"/> Propertyname= "Poolconfig"re

There are scenarios where you need to combine queries based on the Check_code field of Table A and the store_code of table B, Check_result field, and the association between table A and B is one-to-many. to simplify the query parameters, we encapsulate the query parameters and draw out the public querycondition: public class Querycondition On the basis of public querycondition, we encapsulate personalized aquerycondition: public class Aquerycondition extends querycondition Since we used A

The Spring Data JPA is developed based on Hibernate, so building entity and mapping relationships requires a good understanding:------Entity Manager Entity Manager Entitymanager is the entity's Bridge to the database (and the transaction works together), Equivalent to the sqlsession in the Session,mybatis in Hibenrtae. Entity Total 4 states: (Persist for insertion, merge for modification or insertion, remo

Tags: obj null his entry ASN RAM data equals. classPackage com.wanda.cms.dao.repository;Import Org.springframework.stereotype.Repository;Import Javax.persistence.EntityManager;Import Javax.persistence.PersistenceContext;Import Javax.persistence.Query;Import Java.math.BigInteger;Import java.util.*;/*** Build Complex queries* @author LCHB*/@Repositorypublic class nativequeryrepository{@PersistenceContextPrivate Entitymanager Entitymanager;/*** Based on SQL query* @param sql* @param resultclass* @p

https://www.zhihu.com/question/21142149http://how2j.cn/k/hibernate/hibernate-tutorial/31.html?tid=63https://www.zhihu.com/question/29444491/answer/1464577571. Java-struts Framework TutorialStruts is an open source project sponsored by the Apache Software Foundation (ASF). By adopting JAVASERVLET/JSP technology, the application framework of MVC design pattern based on Java eeweb application is realized, and it is the classic MVC design pattern.2. Java-

[Spring tutorial] create a simple spring example, spring Tutorial example 1. First, the main idea of spring is dependency injection. Simply put, there is no need to manually create new objects, and these objects are managed by the

Spring MVC tutorial (I) Spring MVC overview, Spring MVC tutorial Overview Spring MVCThe Framework is an open-source Java platform that provides comprehensive infrastructure support for developing powerful Java-based Web applicatio

[Spring tutorial 8] automatic spring assembly and spring tutorial assembly 1. In spring assembly between us, if a bean uses another bean file, the format should be as follows: That is, when beanA needs to use the accessor to inj

Spring tutorial (I) Overview, spring tutorial Overview Spring tutorial Spring framework is an open-source Java platform that provides comprehensive infrastructure for easy and fast deve