現象1：
org.springframework.beans.factory.BeanCreationException: Error creating bean with name ''org.springframework.aop.support.DefaultPointcutAdvisor'' defined in null: Can''t resolve reference to bean ''txAdvice'' while setting property ''advice''; nested exception is
原因：缺少Spring開頭的各種包，到Spring2.0 src中編譯新的dist目錄出來，拷貝全部的springxxx.jar到jpetstore/WEB-INF/lib下。OK。
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現象2：
org.springframework.beans.factory.BeanCreationException: Error creating bean with name ''sessionFactory'' defined in resource [/WEB-INF/dataAccessContext-hibernate.xml] of ServletContext: Instantiation of bean failed; nested exception is java.lang.NoClassDefFoundError: javax/transaction/TransactionManager
java.lang.NoClassDefFoundError: javax/transaction/TransactionManager
原因：缺少jta.jar，OK
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現象3：
java.lang.NoClassDefFoundError: org/dom4j/Attribute缺dom4j.jar
java.lang.NoClassDefFoundError: net/sf/ehcache/CacheException
缺ehcache.jar
java.lang.NoClassDefFoundError: net/sf/cglib/core/KeyFactory
缺cglib-full.jar
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現象4：
org.springframework.beans.factory.BeanCreationException: Error creating bean with name ''sessionFactory'' defined in resource [/WEB-INF/dataAccessContext-hibernate.xml] of ServletContext: Initialization of bean failed; nested exception is net.sf.hibernate.MappingException: could not instantiate id generator
net.sf.hibernate.MappingException: could not instantiate id generator
原因：
hbm中id字段的定義為沒有定義的sequesce,修改為inc
name="id"
type="string"
column="userid"
>
// 原來是sequence.
這樣就可以了。
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現象6：
org.springframework.beans.factory.BeanCreationException: Error creating bean with name ''/shop/addItemToCart.do'' defined in ServletContext resource [/WEB-INF/petstore-servlet.xml]: Can''t resolve reference to bean ''petStore'' while setting property ''petStore''; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named ''petStore'' is defined
org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named ''petStore'' is defined原因：
我使用Struts作為action,當然就不需要使用Spring WEB framework,因此也不需要與之配套的配置文件例如,petstore-servlet.xml,
還有remote-servlet.xml ,但是Spring仍舊加載此兩個文件，沒辦法，只好將此兩個文件挪動到別的地方，但是又出現找不到這兩個
文件的IO異常，沒辦法，只好又拷貝回來，然后把文件內容晴空。
終于好用了。
原因就是，只要你在web.xml中定義了這個servlet，他就要去找此servlet名字對應的配置文件（servletname-servlet.xml）,找不到就出錯。ok，現在注釋掉web.xml中名字為petstore的servlet定義和影色，刪除petstore-servlet.xml文件，哈哈，這下不報告錯誤了。
同理，注釋名字為remote的servlet，刪除remote-servlet.xml后，重新啟動tomcat，這下不報告任何錯誤了。呵呵。原來如此啊。
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現象：
java.lang.NullPointerException
srx.test.testhibernate.UserDAO.getAll(UserDAO.java:9)
srx.test.struts.action.UserAction.execute(UserAction.java:20)原因：
Action原來
UserDAO // 這個類OK
public class UserDAO extends HibernateDaoSupport {
public List getAll() {
return this.getHibernateTemplate().find("select aa from Account aa");
}
}
//這個類需要修改
public class UserAction extends ActionSupport {
UserDAO dao = new UserDAO();
List accounts = dao.getAll();
。。。
}
修改：
//UserDAO dao = new UserDAO(); WebApplicationContext wac = this.getWebApplicationContext();
UserDAO dao = (UserDAO) wac.getBean("userDAO");


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