spring boot jpa mysql example

recommended to combine SPRING-JDBC to operate, write dynamic native SQL is easier to develop.Life cycle of JPA objects:New: Instantaneous object, no ID yet, and object associated with persistence context.Managed: Persisted managed object, with ID value, has already established an associated object with persistence context.Datached: A free-form offline object with an ID value, but no associated object with

The structure of this article:-What is Springdata JPA-Springboot Integrated Spring data JPA 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 the parameter. This interface is primarily f

The configuration of the data source can be followed by the example of Spring boot Learning (vii) Web applications using the Datasourceconfig implementation of JdbcTemplate multiple data source configuration. Add the JPA configuration for the first data source, note the two notes where you specify the Entity entity and

=jdbc:mysql://localhost:3306/test?useunicode=truecharacterencoding=utf-8 usessl=false Spring.datasource.username=Rootspring.datasource.password=123456Spring.datasource.driver-class-name=Com.mysql.jdbc.Driverspring.jpa.properties.hibernate.hbm2ddl.auto=ValidateIv. Creating a database access classImport Org.springframework.data.jpa.repository.JpaRepository;Import Org.springframework.data.jpa.repository.Query;Import Org.springframework.data.repository.query.Param;Import Com.zh.SpringBootDemo.domain

: policies \ Database MySQL Oracle PostgreSQL Kingbase TABLE Support Support Support Support SEQUENCE Not supported Support Support Support IDENTITY Support Not supported Support Support AUTO Support Support Support Support Hibernate extended ID policy Of course, there are a few strategies that ar

various types of simple additions and deletions, spring data provides a direct query based on the proxy method, nothing needs to do, the only need to write interfaces, naming methods, this part is too convenient, and simple query to solve almost 80% of the problem. This part is relatively simple, do not repeat, refer to the use of the Daquan section. Because of the implementation of the template DAO, so that the DAO layer of these concrete entities h

(Entitymanagerfactorybuilder builder) {Return Builder.datasource (Primarydatasource). Properties (Getvendorproperties (Primarydatasource)). Packages (" COM.ZH.SPRINGBOOTDEMO.DOMAIN.P ")//Set the entity class where. Persistenceunit ("Primarypersistenceunit"). Build ();}@AutowiredPrivate Jpaproperties jpaproperties;Private mapReturn jpaproperties.gethibernateproperties (DataSource);}@Primary@Bean (name = "Transactionmanagerprimary")Public Platformtransactionmanager transactionmanagerprimary (Enti

1. Introduction of two dependenciesDependency> groupId>Org.springframework.bootgroupId> Artifactid>Spring-boot-starter-data-jpaArtifactid>Dependency>Dependency> groupId>MysqlgroupId> Artifactid>Mysql-connector-javaArtifactid>Dependency>2. Modify the data source configurationSpring: Profiles: active:dev JPA

=requestmethod.get) Public@ResponseBody listGetAll () {iterableGradeservice.getall (); IteratorAll.iterator (); ListNewArraylist(); while(Iterator.hasnext ()) {Grade Grade=Iterator.next (); Grades.add (grade); } returngrades; }}5. Spring Boot entry Package com.example; Import org.springframework.boot.SpringApplication; Import org.springframework.boot.autoconfigure.SpringBootApplication; @Spr

Jpaproperties.gethibernateproperties (DataSource); } @Bean (name = " Transactionmanagersecondary ") Platformtransactionmanager transactionmanagersecondary ( Entitymanagerfactorybuilder builder) { return new Jpatransactionmanager (Entitymanagerfactorysecondary (builder). GetObject ()); } /span> 4 UseDAO (repo) from different databases can be injected into any other bean at this time.@ControllerPublicclass testcontroller { @ Autowired SYSROLEREPO1 sysrolerepo1; @Autowired Sys

Just refer to this.http://blog.csdn.net/wazz753/article/details/72472411PS: The integration process of POM files, I joined the content as follows, two are required, entity class remember annotated and primary key ID generation method1.5. 6. release//mvnrepository.com/artifact/ Javax.persistence/persistence-api- 1.0. 2Spring-boot Integrated SPRING-DAATA-JPA