mybatis-plus银行转账

使用Mybatis-Plus实现银行转账可以按照以下步骤进行：

第一步，创建一个实体类，表示银行账户：

public class Account {
    private Long id;
    private String accountNumber;
    private BigDecimal balance;
    // 其他属性和方法
}

第二步，创建一个Mapper接口，用于定义数据库操作方法：

public interface AccountMapper extends BaseMapper<Account> {
    // 其他方法，如转账操作等
}

第三步，创建一个Service类，用于编写转账的业务逻辑：

@Service
public class AccountService {
    @Autowired
    private AccountMapper accountMapper;

    public void transfer(Long fromAccountId, Long toAccountId, BigDecimal amount) {
        // 查询转出账户和转入账户
        Account fromAccount = accountMapper.selectById(fromAccountId);
        Account toAccount = accountMapper.selectById(toAccountId);

        // 判断转出账户余额是否足够
        if (fromAccount.getBalance().compareTo(amount) < 0) {
            throw new RuntimeException("转出账户余额不足");
        }

        // 更新转出账户余额
        fromAccount.setBalance(fromAccount.getBalance().subtract(amount));
        accountMapper.updateById(fromAccount);

        // 更新转入账户余额
        toAccount.setBalance(toAccount.getBalance().add(amount));
        accountMapper.updateById(toAccount);
    }
}

第四步，配置Mybatis-Plus分页插件。在Mybatis-Plus的配置类中添加分页插件的Bean定义：

@Configuration
@EnableTransactionManagement
public class MybatisPlusConfig {
    @Bean
    public PaginationInterceptor paginationInterceptor() {
        PaginationInterceptor paginationInterceptor = new PaginationInterceptor();
        paginationInterceptor.setCountSqlParser(new JsqlParserCountOptimize(true));
        return paginationInterceptor;
    }
}

以上是使用Mybatis-Plus实现银行转账的基本步骤。可以根据实际业务需求进行修改和扩展。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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