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类作为被审计的对象

@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=create
spring.jpa.properties.org.hibernate.envers.audit_strategy=org.hibernate.envers.strategy.internal.ValidityAuditStrategy
spring.jpa.properties.org.hibernate.envers.audit_strategy_validity_store_revend_timestamp=true
spring.h2.console.enabled=true
spring.h2.console.path=/h2
spring.datasource.url=jdbc:h2:mem:envers
spring.datasource.username=sa
spring.datasource.password=sa
spring.datasource.driverClassName=org.h2.Driver

创建相应的UserRepository

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

添加用于增删改的Controller

@Controller
public 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;
    }
}

添加启动类

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

运行程序后,访问http://localhost:8080/h2,输入密码sa,即可登陆数据库并查询数据

由于配置了spring.jpa.hibernate.ddl-auto=create,可以看到系统已经为我们生成了相关的数据表

 

 其中USER是实体类的表,USER_AUD是对应的审计表

依次访问以下链接,增加两条数据,分别对两条数据进行更新,再删除第一条数据

  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页面查询USER表

 

可以看到,USER表只有第二条数据更新后的记录了

而查询USER_AUD表

 可以看到表中存在5条记录,分别对应着上面的五次操作

 其中ID是USER表的主键,REV是USER_AUD的主键,REVTYPE是操作类型,0新增,1更新,2删除,name则是对应USER的name属性

hibernate提供了两种审计策略,分别是

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

 如果使用DefaultAuditStrategy,USER_AUD表中不会有REVEND,REVEND_TSTMP两个字段,只会单纯的记录变更与版本

而使用ValidityAuditStrategy,在新增一条变更记录时,会更新上一条变更记录的REVEND,REVEND_TSTMP为当前的版本号以及变更时间

因为ValidityAuditStrategy除了插入新纪录还要更新旧的记录,所以插入速度会慢一点,但是因为提供了额外的信息,对于数据查询,速度则较DefaultAuditStrategy更快一些

posted on 2020-06-18 10:56  yytxdy  阅读(1026)  评论(0编辑  收藏  举报