使用ControllerClassNameHandlerMapping实现SpringMVC

�~�来如此 — Sat, 17 Jul 2010 10:29:00 GMT

做�ؓspring的新手，很愿意尝试这��L��优秀框架�Q�但最�q�做��目�Ӟ��L��到��g�h的问�?br />��Z��做到雉��|�用��C��ControllerClassNameHandlerMapping�Q�访问预先设定好的url�Q��M��出现No mapping for [/springT/registration.hr] in DispatcherServlet with name 'Dispatcher'

1
2
3    <bean class="org.springframework.web.servlet.mvc.support.ControllerClassNameHandlerMapping"/>
4
5    <bean id="registrationController" class="com.RegistrationController"/>
6     <bean id="userController" class="com.UserController" scope="request"/>

看似Controller都已�l�注入到Spring中：

2010-07-17 15:48:23 Registering Controller 'registrationController' as handler for URL path [/registration]
2010-07-17 15:48:23 Creating shared instance of singleton bean 'registrationController'
2010-07-17 15:48:23 Creating instance of bean 'registrationController'
2010-07-17 15:48:23 Eagerly caching bean 'registrationController' to allow for resolving potential circular references
2010-07-17 15:48:23 Finished creating instance of bean 'registrationController'
2010-07-17 15:48:23 Mapped URL path [/registration] onto handler [com.RegistrationController@1a2af25]
2010-07-17 15:48:23 Registering Controller 'userController' as handler for URL path [/user]

讉K��debug错误信息如下�Q?/p>

12010-07-17 15:49:50 Looking up handler for [/registration.hr]
22010-07-17 15:49:50 No mapping for [/springT/registration.hr] in DispatcherServlet with name 'Dispatcher'

通过多方努力�Q�同事的帮助下，发现是缺包spring-web.jar、spring-webmvc.jar�Q�也真搞�W�，�~�Z��个包居然没有错误�Q�特此记�?/p>

12010-07-17 16:55:00 Rejected bean name 'org.springframework.web.servlet.mvc.support.ControllerClassNameHandlerMapping#0': no URL paths identified
22010-07-17 16:55:00 Creating shared instance of singleton bean 'registrationController'
32010-07-17 16:55:00 Creating instance of bean 'registrationController'
42010-07-17 16:55:00 Eagerly caching bean 'registrationController' to allow for resolving potential circular references
52010-07-17 16:55:00 Finished creating instance of bean 'registrationController'
62010-07-17 16:55:00 Mapped URL path [/registration*] onto handler [com.RegistrationController@4dc957]
72010-07-17 16:55:00 Mapped URL path [/user*] onto handler [userController]

中间最大的差异��是
正确�Q?br /> Mapped URL path [/registration*] onto handler [com.RegistrationController@4dc957]
错误�Q?br /> Mapped URL path [/registration] onto handler [com.RegistrationController@1a2af25

�~�来如此 2010-07-17 18:29 发表评论

使用OpenSessionInView模式时的一个异帔R��题解��x��?

�~�来如此 — Fri, 02 Nov 2007 09:12:00 GMT

�׃��OpenSessionInViewFilter把session�l�在当前�U�程上，��D��session的生命周期比事务要长�Q�这期间所有事务性操作都在复用这同一个session�Q�由此��生了一些“怪问题”：
1.出现如下错误�Q?
org.springframework.dao.InvalidDataAccessApiUsageException: Write operations are not allowed in read-only mode (FlushMode.NEVER) - turn your Session into FlushMode.AUTO or remove 'readOnly' marker from transaction definition
分析原因�Q�OpenSessionInViewFilter在把session�l�在当前�U�程上的时�?会把session的flush mode 设�ؓFlushMode.NEVER�Q�因此，如果某个�Ҏ��没有事务或者有只读事务�Q�则不能对session做insert,update,delete操作�Q�除非事先把session的flush mode手动设�ؓauto

�Ҏ��Q?/strong>
1、将singleSession设�ؓfalse�Q�这样只要改web.xml�Q�缺�Ҏ��Hibernate Session的Instance可能会大增，使用的JDBC Connection量也会大增，如果Connection Pool的maxPoolSize讑־�太小�Q�很�Ҏ��出问题�?lt;!-- singleSession默认为true,若设为false则等于没�?span class="me1">OpenSessionInView -->
2、在控制器中自行��理Session的FlushMode�Q�麻烦的是每个有Modify的Method都要多几行程�?/div>
session.setFlushMode(FlushMode.AUTO);
session.update(user);
session.flush();
3、Extend OpenSessionInViewFilter�Q�Override protected Session getSession(SessionFactory sessionFactory)�Q�将FlushMode直接改�ؓAuto�?br /> 4、让�Ҏ��受Spring的事务控�Ӟ��service和配�|�文件对应）

�~�来如此 2007-11-02 17:12 发表评论

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使用ControllerClassNameHandlerMapping实现SpringMVC

使用OpenSessionInView模式时的一个异帔R��题解��x���?

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使用OpenSessionInView模式时的一个异帔R��题解��x��?