添加maven配置

<?xml version='1.0' encoding='UTF-8'?><project xmlns='http://maven.apache.org/POM/4.0.0' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xsi:schemaLocation='http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd'> <modelVersion>4.0.0</modelVersion> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.2.5.RELEASE</version> </parent> <artifactId>springboot-envers</artifactId> <name>springboot-envers</name> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-jpa</artifactId> </dependency> <dependency> <groupId>org.hibernate</groupId> <artifactId>hibernate-envers</artifactId> </dependency> <dependency> <groupId>com.h2database</groupId> <artifactId>h2</artifactId> </dependency> </dependencies></project>

使用User類(lèi)作為被審計(jì)的對(duì)象

@Entity@Table(name = 'user')@Audited@JsonIgnoreProperties(value = 'hibernateLazyInitializer')public class User { @Id @GeneratedValue private Long id; private String name; public Long getId() { return id; } public void setId(Long id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; }}

添加配置

spring.jpa.hibernate.ddl-auto=createspring.jpa.properties.org.hibernate.envers.audit_strategy=org.hibernate.envers.strategy.internal.ValidityAuditStrategyspring.jpa.properties.org.hibernate.envers.audit_strategy_validity_store_revend_timestamp=truespring.h2.console.enabled=truespring.h2.console.path=/h2spring.datasource.url=jdbc:h2:mem:enversspring.datasource.username=saspring.datasource.password=saspring.datasource.driverClassName=org.h2.Driver

創(chuàng)建相應(yīng)的UserRepository

@Repositorypublic interface UserRepository extends JpaRepository<User, Long> {}

添加用于增刪改的Controller

@Controllerpublic class UserController { @Autowired private UserRepository userRepository; private int counter; @ResponseBody @RequestMapping('/user/add') public Object add() { User user = new User(); user.setName('name' + ++counter); userRepository.save(user); return user; } @ResponseBody @RequestMapping('/user/update/{id}') public Object update(@PathVariable Long id) { User user = userRepository.getOne(id); user.setName('name' + ++counter); userRepository.save(user); return user; } @ResponseBody @RequestMapping('/user/delete/{id}') public Object delete(@PathVariable Long id) { User user = userRepository.getOne(id); userRepository.delete(user); return user; }}

添加啟動(dòng)類(lèi)

@SpringBootApplicationpublic class SpringbootEnversApplication { public static void main(String[] args) { SpringApplication.run(SpringbootEnversApplication.class, args); }}

運(yùn)行程序后，訪問(wèn)http://localhost:8080/h2，輸入密碼sa，即可登陸數(shù)據(jù)庫(kù)并查詢(xún)數(shù)據(jù)

由于配置了spring.jpa.hibernate.ddl-auto=create，可以看到系統(tǒng)已經(jīng)為我們生成了相關(guān)的數(shù)據(jù)表

其中USER是實(shí)體類(lèi)的表，USER_AUD是對(duì)應(yīng)的審計(jì)表

依次訪問(wèn)以下鏈接，增加兩條數(shù)據(jù)，分別對(duì)兩條數(shù)據(jù)進(jìn)行更新，再刪除第一條數(shù)據(jù)

http://localhost:8080/user/add

http://localhost:8080/user/add

http://localhost:8080/user/update/1

http://localhost:8080/user/update/2

http://localhost:8080/user/delete/1

在h2頁(yè)面查詢(xún)USER表

可以看到，USER表只有第二條數(shù)據(jù)更新后的記錄了

而查詢(xún)USER_AUD表

可以看到表中存在5條記錄，分別對(duì)應(yīng)著上面的五次操作

其中ID是USER表的主鍵，REV是USER_AUD的主鍵，REVTYPE是操作類(lèi)型，0新增，1更新，2刪除，name則是對(duì)應(yīng)USER的name屬性

hibernate提供了兩種審計(jì)策略，分別是

org.hibernate.envers.strategy.internal.DefaultAuditStrategy org.hibernate.envers.strategy.internal.ValidityAuditStrategy

如果使用DefaultAuditStrategy，USER_AUD表中不會(huì)有REVEND，REVEND_TSTMP兩個(gè)字段，只會(huì)單純的記錄變更與版本

而使用ValidityAuditStrategy，在新增一條變更記錄時(shí)，會(huì)更新上一條變更記錄的REVEND，REVEND_TSTMP為當(dāng)前的版本號(hào)以及變更時(shí)間

因?yàn)閂alidityAuditStrategy除了插入新紀(jì)錄還要更新舊的記錄，所以插入速度會(huì)慢一點(diǎn)，但是因?yàn)樘峁┝祟~外的信息，對(duì)于數(shù)據(jù)查詢(xún)，速度則較DefaultAuditStrategy更快一些

以上就是本文的全部?jī)?nèi)容，希望對(duì)大家的學(xué)習(xí)有所幫助，也希望大家多多支持好吧啦網(wǎng)。