最近項目中需要進行分表就使用了ShardingJDBC做數據庫中間層操作
之前sql中有寫批量插入，而ShardingJDBC不支持insert xxx values(...),(...),(...)語句
故需要手動開啟事務，循環插入並提交事務（與之前批量插入語句性能未做比較）

@Component
public class UserManager implements ApplicationContextAware {

    private static ApplicationContext applicationContext;
    @Autowired
    private UserDao UserDao;

    public
 
 void createUseres(List<User> UserList) {
        DefaultTransactionDefinition definition = new DefaultTransactionDefinition();
        definition.setPropagationBehavior(TransactionDefinition.PROPAGATION_REQUIRES_NEW);
        definition.setIsolationLevel(TransactionDefinition.ISOLATION_READ_COMMITTED
 
);

        DataSourceTransactionManager transactionManager = (DataSourceTransactionManager)
                applicationContext.getBean("transactionManager");
        TransactionStatus transactionStatus = transactionManager.getTransaction(definition);

        for (User User : UserList) {
            //UserDao有create方法，單條插入
 

            applicationContext.getBean(UserDao.class).create(User);
        }

        transactionManager.commit(transactionStatus);
    }

    @Override
    public void setApplicationContext(ApplicationContext ac) throws BeansException {
        applicationContext = ac;
    }
}

ShardingJDBC不支持批量插入的一種解決辦法