Write operations are not allowed in read-only mode (FlushMode.MANUAL): Turn your Session into FlushM


Write operations are not allowed in read-only mode (FlushMode.MANUAL): Turn your Session into FlushMode.COMMIT/AUTO or remove 'readOnly' marker from transaction definition.

在使用hibernate模板对数据库进行读写操作时，有时会遇到删除、写入操作受限，对于这种异常，可以多种办法解决，

首先你测试先一下是添加受限，还是删除受限，如果添加和删除有一个可以成功，那么错误可能是：

第一）种错误，没有给对应方法配置权限，

<props>
<prop key="save*">PROPAGATION_REQUIRED</prop>
<prop key="update*">PROPAGATION_REQUIRED</prop>
<prop key="delete*">PROPAGATION_REQUIRED</prop>
<prop key="do*">PROPAGATION_REQUIRED</prop>
<prop key="recv*">PROPAGATION_REQUIRED</prop>
<prop key="find*">PROPAGATION_REQUIRED,readOnly</prop>
<prop key="get*">PROPAGATION_REQUIRED,readOnly</prop>
</props>

第二）种错误，在Dao层中添加，删除方法错误，请测试查看异常

如果添加和删除都不成功，那么很有可能就是权限问题了，请继续看，以下办法可以解决

1）第一种在Dao层更改 session.setFlushMode(FlushMode.AUTO)；

操作如下：

//注入  hibernateTemplate
private HibernateTemplate hibernateTemplate;
//生成get（）,set（）方法
public HibernateTemplate getHibernateTemplate()
{
return hibernateTemplate;
}
public void setHibernateTemplate(HibernateTemplate hibernateTemplate)
{
this.hibernateTemplate = hibernateTemplate;
}
/**
* 根据id删除记录
* @param id
*/
@Transactional("txManager")
public int removeUser(Integer id)
{
// 1.参数检测
if (index != null && hibernateTemplate != null&& hibernateTemplate.getSessionFactory() != null)
{
// 2.取得sission
Session session = hibernateTemplate.getSessionFactory()
.getCurrentSession();
if (session != null)
{
//2.1 设置session属性
session.setFlushMode(FlushMode.AUTO);
// 2.2删除该id的对象
Query query = session.createQuery("from User  where id ="
+ id);
Comment comment = null;
//3 非空检查
if (query != null)
{
if (query.list().size() > 0)
{
user = (Comment) (query.list().get(0));
// 4.1删除该对象
hibernateTemplate.delete(user);
// 4.2清理缓存
session.flush();
//返回一个表示，成功返回1，失败返回0
return 1;
}
}
}
}
return 0;
}

2 ) 第二种在配置文件web.xml和applicationContext.xml中更改

web.xml文件

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaeehttp://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
id="WebApp_ID" version="3.0">
<display-name>Doshare</display-name>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
<filter>
<filter-name>OpenSessionInViewFilter</filter-name>
<filter-class>
org.springframework.orm.hibernate3.support.OpenSessionInViewFilter
</filter-class>
<init-param>
<param-name>sessionFactoryBeanName</param-name>
<param-value>sessionFactory</param-value>
</init-param>
<init-param>
<param-name>singleSession</param-name>
<param-value>true</param-value>
</init-param>
<init-param>
<param-name>flushMode</param-name>
<param-value>AUTO </param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>OpenSessionInViewFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<jsp-config>
<jsp-property-group>
<display-name>JSPConfiguration</display-name>
<url-pattern>*.htm</url-pattern>
<el-ignored>true</el-ignored>
<page-encoding>UTF-8</page-encoding>
<scripting-invalid>false</scripting-invalid>
</jsp-property-group>
<jsp-property-group>
<display-name>JSPConfiguration</display-name>
<url-pattern>*.jsp</url-pattern>
<el-ignored>false</el-ignored>
<page-encoding>UTF-8</page-encoding>
<scripting-invalid>false</scripting-invalid>
</jsp-property-group>
</jsp-config>
<!-- Struts2 核心过滤器 -->
<filter>
<filter-name>struts2</filter-name>
<filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>struts2</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<!-- Spring 監聽器 -->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
</web-app>

applicationContext.xml文件

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"
xmlns:tx="http://www.springframework.org/schema/tx" xmlns:aop="http://www.springframework.org/schema/aop"
xsi:schemaLocation="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/contexthttp://www.springframework.org/schema/context/spring-context-4.0.xsd"> <!-- 指定C3P0连接池 -->
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"
destroy-method="close">
<property name="driverClass" value="org.mariadb.jdbc.Driver"></property>
<property name="jdbcUrl"
value="jdbc:mysql://localhost:3308/test?userUnicode=true&characterEncoding=UTF-8"></property>
<!--数据库用户名和密码-->
<property name="user" value="root"></property>
<property name="password" value="123456"></property>
<!--最大连接数-->
<property name="maxPoolSize" value="500"></property>
<!--最小连接数-->
<property name="minPoolSize" value="5"></property>
<!-- 保持MySQL连接 -->
<property name="preferredTestQuery" value="SELECT 1"></property>
</bean>
<!-- 使用Spring管理Hibernate -->
<bean id="sessionFactory"
class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
<property name="dataSource" ref="dataSource"></property>
<!-- Hibernate的属性 -->
<property name="hibernateProperties">
<props>
<!-- 连接池自动重连 -->
<prop key="hibernate.connection.autoReconnectForPools">true</prop>
<!-- 连接编码 -->
<prop key="hibernate.connection.characterEncoding">UTF-8</prop>
<!-- 方言 -->
<prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
<!-- showsq -->
<prop key="hibernate.show_sql">true</prop>
<!-- 避免JDBC出错，仅限于MySQL -->
<prop key="hibernate.temp.use_jdbc_metadata_defaults">false</prop>
<!-- 自动创建表 -->
<prop key="hibernate.hbm2ddl.auto">update</prop>
<prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
<prop key="hibernate.current_session_context_class">org.springframework.orm.hibernate4.SpringSessionContext
</prop>
</props>
</property>
<property name="mappingResources">
<list>
<value>com/doshr/xmen/app/server/bean/Comment.hbm.xml</value>
<value>com/doshr/xmen/app/server/bean/WeChatFriend.hbm.xml</value>
<value>com/doshr/xmen/app/server/bean/Address.hbm.xml</value>
<value>com/doshr/xmen/app/server/bean/Propertyes.hbm.xml</value>
</list>
</property>
</bean>
<!-- 配置Spring的Hibernate模板 -->
<bean id="hibernateTemplate" class="org.springframework.orm.hibernate4.HibernateTemplate">
<property name="sessionFactory" ref="sessionFactory"></property>
</bean>
<!-- 配置Spring事务管理器 -->
<bean id="txManager"
class="org.springframework.orm.hibernate4.HibernateTransactionManager">
<property name="sessionFactory" ref="sessionFactory"></property>
</bean>
<!-- 配置事務攔截器 -->
<bean id="txInterceptor"
class="org.springframework.transaction.interceptor.TransactionInterceptor">
<property name="transactionManager">
<ref bean="txManager" />
</property>
<property name="transactionAttributes">
<props>
<prop key="save*">PROPAGATION_REQUIRED</prop>
<prop key="update*">PROPAGATION_REQUIRED</prop>
<prop key="delete*">PROPAGATION_REQUIRED</prop>
<prop key="do*">PROPAGATION_REQUIRED</prop>
<prop key="recv*">PROPAGATION_REQUIRED</prop>
<prop key="find*">PROPAGATION_REQUIRED,readOnly</prop>
<prop key="get*">PROPAGATION_REQUIRED,readOnly</prop>
<prop key="*">PROPAGATION_REQUIRED</prop>
</props>
</property>
</bean>
<!-- 事务代理 -->
<bean
class="org.springframework.aop.framework.autoproxy.BeanNameAutoProxyCreator">
<property name="interceptorNames">
<list>
<value>txInterceptor</value>
</list>
</property>
<property name="beanNames">
<list>
<value>*Dao</value>
<value>*Service</value>
</list>
</property>
</bean>
</beans>

3)第三种写一个过滤器，让类（继承）extends

org.springframework.orm.hibernate4.support.OpenSessionInViewFilter 重写方法

<!--结束-->

有问题的或者异常的，请说明信息，一起讨论