spring的JdbcTemplate事務使用

     參考  http://my.oschina.net/lhplj/blog/341555    

public boolean transferMoney(Serializable fromId, Serializable toId,
			int tradeMoney) {
		// 標識
		boolean flag = false;
		//
		String sql[] = new String[2];
		sql[0] = "update BankAccount ba set ba.balance = ba.balance - "
				+ tradeMoney + " where ba.id='" + fromId + "'";
		sql[1] = "update BankAccount ba set ba.balance = ba.balance + "
				+ tradeMoney + " where ba.id='" + toId + "'";
		// 事務
		DefaultTransactionDefinition def = new DefaultTransactionDefinition();
		DataSourceTransactionManager transactionManager = new DataSourceTransactionManager(
				jt.getDataSource());
		TransactionStatus status = transactionManager.getTransaction(def);
		// 執行結果
		int result[] = new int[sql.length];
		// 批量執行
		result = this.jt.batchUpdate(sql);
		// 是否提交事務
		boolean commit = true;
		for (int j = 0; j < result.length; j++) {
			if (result[j] == 0) { // 錯誤執行
				commit = false;
				transactionManager.rollback(status);
				break;
			}
		}
		// 成功才提交事務
		if (commit) {
			transactionManager.commit(status);
			flag = true;
		}
		// 返回
		return flag;
	}