准备工作
1.创建数据库表 dept_log 日志表：
create table dept_log(
id int auto_increment comment '主键ID' primary key,
create_time datetime null comment '操作时间',
description varchar(300) null comment '操作描述'
)comment '部门操作日志表';
2.引入实体类：DeptLog
@Data
@NoArgsConstructor
@AllArgsConstructor
public class DeptLog {
private Integer id;
private LocalDateTime createTime;
private String description;
}
3.引入Mapper接口：DeptLogMapper
@Mapper
public interface DeptLogMapper {
@Insert("insert into dept_log(create_time,description) values(#{createTime},#{description})")
void insert(DeptLog log);
}
4.引入业务接口：DeptLogService
public interface DeptLogService {
void insert(DeptLog deptLog);
}
5.引入业务实现类：DeptLogServiceImpl
@Service
public class DeptLogServiceImpl implements DeptLogService {
@Autowired
private DeptLogMapper deptLogMapper;
@Transactional(propagation =Propagation.REQUIRES_NEW)
@Override
public void insert(DeptLog deptLog) {
deptLogMapper.insert(deptLog);
}
}
代码实现:
业务实现类：DeptServiceImpl
@Slf4j
@Service
//@Transactional //当前业务实现类中的所有的方法，都添加了spring事务管理机制
public class DeptServiceImpl implements DeptService {
@Autowired
private DeptMapper deptMapper;
@Autowired
private EmpMapper empMapper;
@Autowired
private DeptLogService deptLogService;
//根据部门id，删除部门信息及部门下的所有员工
@Override
@Log
@Transactional(rollbackFor = Exception.class)
public void delete(Integer id) throws Exception {
try {
//根据部门id删除部门信息
deptMapper.deleteById(id);
//模拟：异常
if(true){
throw new Exception("出现异常了~~~");
}
//删除部门下的所有员工信息
empMapper.deleteByDeptId(id);
}finally {
//不论是否有异常，最终都要执行的代码：记录日志
DeptLog deptLog = new DeptLog();
deptLog.setCreateTime(LocalDateTime.now());
deptLog.setDescription("执行了解散部门的操作，此时解散的是"+id+"号部门");
//调用其他业务类中的方法
deptLogService.insert(deptLog);
}
}
}
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