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By participating, you are expected to uphold this code of conduct. Please report unacceptable behavior to spring-code-of-conduct@pivotal.io.\n\n== Getting Started\n\nHere is a quick teaser of an application using Spring Data Repositories in Java:\n\n[source,java]\n----\npublic interface PersonRepository extends CrudRepository\u003cPerson, Long\u003e {\n\n  List\u003cPerson\u003e findByLastname(String lastname);\n\n  List\u003cPerson\u003e findByFirstnameLike(String firstname);\n}\n\n@Service\npublic class MyService {\n\n  private final PersonRepository repository;\n\n  public MyService(PersonRepository repository) {\n    this.repository = repository;\n  }\n\n  public void doWork() {\n\n    repository.deleteAll();\n\n    Person person = new Person();\n    person.setFirstname(\"Oliver\");\n    person.setLastname(\"Gierke\");\n    repository.save(person);\n\n    List\u003cPerson\u003e lastNameResults = repository.findByLastname(\"Gierke\");\n    List\u003cPerson\u003e firstNameResults = repository.findByFirstnameLike(\"Oli%\");\n }\n}\n\n@Configuration\n@EnableJpaRepositories(\"com.acme.repositories\")\nclass AppConfig {\n\n  @Bean\n  public DataSource dataSource() {\n    return new EmbeddedDatabaseBuilder().setType(EmbeddedDatabaseType.H2).build();\n  }\n\n  @Bean\n  public JpaTransactionManager transactionManager(EntityManagerFactory emf) {\n    return new JpaTransactionManager(emf);\n  }\n\n  @Bean\n  public JpaVendorAdapter jpaVendorAdapter() {\n    HibernateJpaVendorAdapter jpaVendorAdapter = new HibernateJpaVendorAdapter();\n    jpaVendorAdapter.setDatabase(Database.H2);\n    jpaVendorAdapter.setGenerateDdl(true);\n    return jpaVendorAdapter;\n  }\n\n  @Bean\n  public LocalContainerEntityManagerFactoryBean entityManagerFactory() {\n    LocalContainerEntityManagerFactoryBean lemfb = new LocalContainerEntityManagerFactoryBean();\n    lemfb.setDataSource(dataSource());\n    lemfb.setJpaVendorAdapter(jpaVendorAdapter());\n    lemfb.setPackagesToScan(\"com.acme\");\n    return lemfb;\n  }\n}\n----\n\n=== Maven configuration\n\nAdd the Maven dependency:\n\n[source,xml]\n----\n\u003cdependency\u003e\n  \u003cgroupId\u003eorg.springframework.data\u003c/groupId\u003e\n  \u003cartifactId\u003espring-data-jpa\u003c/artifactId\u003e\n  \u003cversion\u003e${version}\u003c/version\u003e\n\u003c/dependency\u003e\n----\n\nIf you'd rather like the latest snapshots of the upcoming major version, use our Maven snapshot repository and declare the appropriate dependency version.\n\n[source,xml]\n----\n\u003cdependency\u003e\n  \u003cgroupId\u003eorg.springframework.data\u003c/groupId\u003e\n  \u003cartifactId\u003espring-data-jpa\u003c/artifactId\u003e\n  \u003cversion\u003e${version}-SNAPSHOT\u003c/version\u003e\n\u003c/dependency\u003e\n\n\u003crepository\u003e\n  \u003cid\u003espring-snapshot\u003c/id\u003e\n  \u003cname\u003eSpring Snapshot Repository\u003c/name\u003e\n  \u003curl\u003ehttps://repo.spring.io/snapshot\u003c/url\u003e\n\u003c/repository\u003e\n----\n\n== Getting Help\n\nHaving trouble with Spring Data? We’d love to help!\n\n* Check the\nhttps://docs.spring.io/spring-data/jpa/reference/[reference documentation], and https://docs.spring.io/spring-data/jpa/docs/current/api/[Javadocs].\n* Learn the Spring basics – Spring Data builds on Spring Framework, check the https://spring.io[spring.io] web-site for a wealth of reference documentation.\nIf you are just starting out with Spring, try one of the https://spring.io/guides[guides].\n* If you are upgrading, check out the https://github.com/spring-projects/spring-data-jpa/releases[Spring Data JPA release notes] and scroll down to the one you're considering. See the details there. (Also check out the https://github.com/spring-projects/spring-data-jpa/releases/latest[latest stable release])\n* Ask a question - we monitor https://stackoverflow.com[stackoverflow.com] for questions tagged with https://stackoverflow.com/tags/spring-data[`spring-data-jpa`].\n* Report bugs with Spring Data JPA in the https://github.com/spring-projects/spring-data-jpa/issues[GitHub issue tracker].\n\n== Reporting Issues\n\nSpring Data uses GitHub as issue tracking system to record bugs and feature requests. If you want to raise an issue, please follow the recommendations below:\n\n* Before you log a bug, please search the\nhttps://github.com/spring-projects/spring-data-jpa/issues[issue tracker] to see if someone has already reported the problem.\n* If the issue doesn’t exist already, https://github.com/spring-projects/spring-data-jpa/issues[create a new issue].\n* Please provide as much information as possible with the issue report, we like to know the version of Spring Data that you are using and JVM version, complete stack traces and any relevant configuration information.\n* If you need to paste code, or include a stack trace format it as code using triple backtick.\n* If possible try to create a test-case or project that replicates the issue. Attach a link to your code or a compressed file containing your code. Use an in-memory datatabase if possible or set the database up using https://github.com/testcontainers[Testcontainers].\n\n== Building from Source\n\nYou don’t need to build from source to use Spring Data (binaries in https://repo.spring.io[repo.spring.io]), but if you want to try out the latest and greatest, Spring Data can be easily built with the https://github.com/takari/maven-wrapper[maven wrapper].\nYou also need JDK 17 or above.\n\n[source,bash]\n----\n $ ./mvnw clean install\n----\n\nIf you want to build with the regular `mvn` command, you will need https://maven.apache.org/run-maven/index.html[Maven v3.8.0 or above].\n\n_Also see link:CONTRIBUTING.adoc[CONTRIBUTING.adoc] if you wish to submit pull requests, and in particular please sign the https://cla.pivotal.io/sign/spring[Contributor’s Agreement] before your first non-trivial change._\n\n=== Building reference documentation\n\nBuilding the documentation builds also the project without running tests.\n\n[source,bash]\n----\n $ ./mvnw clean install -Pantora\n----\n\nThe generated documentation is available from `target/antora/site/index.html`.\n\n== Guides\n\nThe https://spring.io/[spring.io] site contains several guides that show how to use Spring Data step-by-step:\n\n* https://spring.io/guides/gs/accessing-data-jpa/[Accessing Data with JPA]: Learn how to work with JPA data persistence using Spring Data JPA.\n* https://spring.io/guides/gs/accessing-data-rest/[Accessing JPA Data with REST] is a guide to creating a REST web service exposing data stored with JPA through repositories.\n\n== Examples\n\n* https://github.com/spring-projects/spring-data-examples/[Spring Data Examples] contains example projects that explain specific features in more detail.\n\n== License\n\nSpring Data JPA is Open Source software released under the https://www.apache.org/licenses/LICENSE-2.0.html[Apache 2.0 license].\n","funding_links":[],"categories":["Java","数据库开发","II. 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