使用

DeepSeek V3 中英对照 Usage

你现在可以使用 RevisionRepository 中的方法来查询实体的修订版本，如下面的测试用例所示：

@ExtendWith(SpringExtension.class)
@Import(EnversDemoConfiguration.class) 1
class EnversIntegrationTests {

	final PersonRepository repository;
	final TransactionTemplate tx;

	EnversIntegrationTests(@Autowired PersonRepository repository, @Autowired PlatformTransactionManager tm) {
		this.repository = repository;
		this.tx = new TransactionTemplate(tm);
	}

	@Test
	void testRepository() {

		Person updated = preparePersonHistory();

		Revisions<Long, Person> revisions = repository.findRevisions(updated.id);

		Iterator<Revision<Long, Person>> revisionIterator = revisions.iterator();

		checkNextRevision(revisionIterator, "John", RevisionType.INSERT);
		checkNextRevision(revisionIterator, "Jonny", RevisionType.UPDATE);
		checkNextRevision(revisionIterator, null, RevisionType.DELETE);
		assertThat(revisionIterator.hasNext()).isFalse();

	}

	/**
    * Checks that the next element in the iterator is a Revision entry referencing a Person
    * with the given name after whatever change brought that Revision into existence.
    * <p>
    * As a side effect the Iterator gets advanced by one element.
    *
    * @param revisionIterator the iterator to be tested.
    * @param name the expected name of the Person referenced by the Revision.
    * @param revisionType the type of the revision denoting if it represents an insert, update or delete.
    */
	private void checkNextRevision(Iterator<Revision<Long, Person>> revisionIterator, String name,
			RevisionType revisionType) {

		assertThat(revisionIterator.hasNext()).isTrue();
		Revision<Long, Person> revision = revisionIterator.next();
		assertThat(revision.getEntity().name).isEqualTo(name);
		assertThat(revision.getMetadata().getRevisionType()).isEqualTo(revisionType);
	}

	/**
    * Creates a Person with a couple of changes so it has a non-trivial revision history.
    * @return the created Person.
    */
	private Person preparePersonHistory() {

		Person john = new Person();
		john.setName("John");

		// create
		Person saved = tx.execute(__ -> repository.save(john));
		assertThat(saved).isNotNull();

		saved.setName("Jonny");

		// update
		Person updated = tx.execute(__ -> repository.save(saved));
		assertThat(updated).isNotNull();

		// delete
		tx.executeWithoutResult(__ -> repository.delete(updated));
		return updated;
	}
}

java

• 这里引用了之前介绍的应用程序上下文配置（在 配置 部分）。

更多资源

你可以在 Spring Data Examples 仓库 中下载 Spring Data Envers 示例，并通过实际操作来感受该库的工作方式。

你还应该查看 RevisionRepository 的 Javadoc 以及相关类。

你可以在 Stackoverflow 上使用 spring-data-envers 标签提问。

Spring Data Envers 的源代码和问题跟踪器托管在 GitHub 上（作为 Spring Data JPA 的一个模块）。