@Transactional

启动类添加 @EnableTransactionManagement

service层添加 Transactional

注意，Transactional 默认只对 uncheck异常进行回滚，比如runtimeException
踩坑

@Transactional
@Service
public class CompanyServiceService implements CompanyService {
    @Autowired
    private CompanyMapper companyMapper;
    @Autowired
    private CompanyBackInfoMapper companyBackInfo;
    @Override
    public int CompanyInsert(Company company, CompanyBackInfo[] companyBackInfos) throws Exception {
        company.setDelete(0);
        int i = companyMapper.insertSelective(company);
        for (CompanyBackInfo e: companyBackInfos){
            e.setDelete(0);
            e.setCompanyId(String.valueOf(i));
        }
        int i1 = companyBackInfo.bulkInsert(companyBackInfos);
        throw new BusinessException(112,"shibai"); // 能回滚
        throw new Exception("shibai");  // 不能回滚，上面的插入依然执行
    }

BusinessException

public class BusinessException extends RuntimeException {
    /**
     * 提示编码
     */
    private final  int code;
    /**
     * 后端提示语
     */
    private final String msg;
    public BusinessException(int code, String msg) {
        super(msg);
        this.code = code;
        this.msg = msg;
    }
    public BusinessException(ResponseCodeInterface responseCodeInterface) {
        this(responseCodeInterface.getCode(),responseCodeInterface.getMsg());
    }
    public int getCode() {
        return code;
    }
    public String getMsg() {
        return msg;
    }
}