决解Connection is read-only. Queries leading to data modification are not allowed

错误的原因

连接只允许用来读取数据

不能用来修改数据

举个例子 ，假如有下面这么个方法

boolean returnBook(Book book)

需要配置下对应的事务

<tx:method name="return*" propagation="REQUIRED" />

不然 就会报 这个 错误

Connection is read-only. Queries leading to data modification are not allowed

事务一般的配置如下

<tx:advice id="txAdvice" transaction-manager="transactionManager">
        <tx:attributes>
        <tx:method name="save*" propagation="REQUIRED" />
        <tx:method name="del*" propagation="REQUIRED" />
        <tx:method name="update*" propagation="REQUIRED" />
        <tx:method name="*" read-only="true" />
        </tx:attributes>
</tx:advice>