SpringBoot与MybatisPlus整合之公用字段填充(十一)

在实际开发中，适合用于记录创建人修改人

• pom.xml

  <dependencies>
          <dependency>
              <groupId>org.springframework.boot</groupId>
              <artifactId>spring-boot-starter</artifactId>
          </dependency>
          <dependency>
              <groupId>com.baomidou</groupId>
              <artifactId>mybatis-plus-boot-starter</artifactId>
              <version>3.2.0</version>
          </dependency>
          <dependency>
              <groupId>org.projectlombok</groupId>
              <artifactId>lombok</artifactId>
          </dependency>
          <!-- https://mvnrepository.com/artifact/p6spy/p6spy -->
          <dependency>
              <groupId>p6spy</groupId>
              <artifactId>p6spy</artifactId>
              <version>3.8.0</version>
          </dependency>
          <dependency>
              <groupId>com.h2database</groupId>
              <artifactId>h2</artifactId>
              <scope>runtime</scope>
          </dependency>
  ​
          <dependency>
              <groupId>com.alibaba</groupId>
              <artifactId>fastjson</artifactId>
              <version>1.2.49</version>
              <scope>test</scope>
          </dependency>
          <!-- for testing -->
          <dependency>
              <groupId>org.springframework.boot</groupId>
              <artifactId>spring-boot-starter-test</artifactId>
              <scope>test</scope>
          </dependency>
      </dependencies>

• application.yml

  spring:
    datasource:
      driver-class-name: com.p6spy.engine.spy.P6SpyDriver
      url: jdbc:p6spy:h2:tcp://192.168.180.115:19200/~/mem/test
      username: root
      password: test

• 实体类

  @Data
  @TableName(value = "user")
  @NoArgsConstructor
  @AllArgsConstructor
  public class User {
      
      private Long id;
      
      private String name;
      
      private Integer age;
      
      private String email;
      
      @TableField(fill = FieldFill.INSERT_UPDATE)
      private String operator;
  }
  ​
  @Mapper
  public interface UserMapper extends BaseMapper<User> {
  ​
  }

• 填充器

  @Component
  public class MyMetaObjectHandler implements MetaObjectHandler {
  ​
      private static final Logger LOGGER = LoggerFactory.getLogger(MyMetaObjectHandler.class);
  ​
      @Override
      public void insertFill(MetaObject metaObject) {
          LOGGER.info("start insert fill ....");
          //避免使用metaObject.setValue()
          this.setFieldValByName("operator", "Jerry", metaObject);
      }
  ​
      @Override
      public void updateFill(MetaObject metaObject) {
          LOGGER.info("start update fill ....");
          this.setFieldValByName("operator", "Tom", metaObject);
      }
  }

• 测试类

  @SpringBootTest
  class MetainfoApplicationTests {
  ​
      private static final Logger LOGGER = LoggerFactory.getLogger(MetainfoApplicationTests.class);
  ​
      @Autowired(required = false)
      private UserMapper userMapper;
  ​
      @Test
      public void test(){
          User user = new User(null,"Tom",1,"tom@qq.com",null);
          userMapper.insert(user);
          LOGGER.info("query user:{}",userMapper.selectById(user.getId()));
          User beforeUser = userMapper.selectById(1L);
          LOGGER.info("before user:{}",beforeUser);
          beforeUser.setAge(12);
          userMapper.updateById(beforeUser);
          LOGGER.info("query user:{}",userMapper.selectById(1L));
      }
  ​
  }

• 测试结果

2019-10-31 13:22:13.328  INFO 14172 --- [           main] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Start completed.
 Consume Time：0 ms 2019-10-31 13:22:13
 Execute SQL：INSERT INTO user ( id, name, operator, email, age ) VALUES ( 1189774553572806657, 'Tom', 'Jerry', 'tom@qq.com', 1 )
​
 Consume Time：6 ms 2019-10-31 13:22:13
 Execute SQL：SELECT id,name,operator,email,age FROM user WHERE id=1189774553572806657 
​
2019-10-31 13:22:13.394  INFO 14172 --- [           main] c.mp.metainfo.MetainfoApplicationTests   : query user:User(id=1189774553572806657, name=Tom, age=1, email=tom@qq.com, operator=Jerry)
2019-10-31 13:22:13.397  INFO 14172 --- [           main] c.mp.metainfo.MetainfoApplicationTests   : before user:User(id=1, name=Jone, age=18, email=test1@baomidou.com, operator=test)
 Consume Time：0 ms 2019-10-31 13:22:13
 Execute SQL：SELECT id,name,operator,email,age FROM user WHERE id=1 
​
2019-10-31 13:22:13.404  INFO 14172 --- [           main] c.m.m.handler.MyMetaObjectHandler        : start update fill ....
 Consume Time：0 ms 2019-10-31 13:22:13
 Execute SQL：UPDATE user SET name='Jone', operator='Tom', email='test1@baomidou.com', age=12 WHERE id=1
​
2019-10-31 13:22:13.417  INFO 14172 --- [           main] c.mp.metainfo.MetainfoApplicationTests   : query user:User(id=1, name=Jone, age=12, email=test1@baomidou.com, operator=Tom)
 Consume Time：1 ms 2019-10-31 13:22:13
 Execute SQL：SELECT id,name,operator,email,age FROM user WHERE id=1 
​

原文地址：https://www.cnblogs.com/dalianpai/p/11770689.html