hibernate+struts2+spring问题，请各位大侠帮帮忙？？

Question

我用hibernate+struts2+spring这三大框架做了个小例子，但是写完之后，启动服务器，没有问题，但是运行页面，页面上报空值中异常，说action中定义的userService是空值，我猜是spring没有自动创建对象，还是根本没有读取到application文件？？各位大侠，帮帮，看看是什么问题？？
application配置文件代码如下：
<!-- session -->
<bean id="sessionFactory"
class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
<property name="configLocation"
value="classpath:hibernate.cfg.xml">
</property>
</bean>

<!-- dao -->
<bean id="UsersDAO" class="com.dao.UsersDAO">
<property name="sessionFactory">
<ref bean="sessionFactory" />
</property>
</bean>
<bean id="DeptDAO" class="com.dao.DeptDAO">
<property name="sessionFactory">
<ref bean="sessionFactory" />
</property>
</bean>

<!-- service -->
<bean id="UserService" class="com.service.UserService">
<property name="userdao" ref="UsersDAO"></property>
</bean>

<!-- action -->
<bean id="UserAction" class="com.action.UserAction">
<property name="userService" ref="UserService"></property>
</bean>

<!-- 事务 -->
<!-- 事务管理器 -->
<bean id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager">
<property name="sessionFactory" ref="sessionFactory">
</property>
</bean>
<!-- 事务属性 -->
<tx:advice id="mytx">
<tx:attributes>
<tx:method name="*"/>
</tx:attributes>
</tx:advice>
<!-- 织入 -->
<aop:config>
<aop:advisor advice-ref="mytx" pointcut="execution(* com.service.*.*(..))"/>
</aop:config>web.xml文件配置：
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee"
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee   http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
 <context-param>
  <param-name>contextConfigLocation</param-name>
  <param-value>/WEB-INF/classes/app*.xml</param-value>
 </context-param>
 <filter>
  <filter-name>session</filter-name>
  <filter-class>org.springframework.orm.hibernate3.support.OpenSessionInViewFilter</filter-class>
 </filter>
 <filter>
  <filter-name>struts2</filter-name>
  <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
 </filter>
 <filter-mapping>
  <filter-name>session</filter-name>
  <url-pattern>/*</url-pattern>
 </filter-mapping>
 <filter-mapping>
  <filter-name>struts2</filter-name>
  <url-pattern>/*</url-pattern>
 </filter-mapping>
 <listener>
  <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
 </listener>
 <welcome-file-list>
  <welcome-file>index.jsp</welcome-file>
 </welcome-file-list>
 <login-config>
  <auth-method>BASIC</auth-method>
 </login-config>
</web-app>

Answer 1

spring里面的事务要放sessionFactory,你放的位置不对

Answer 2

后台没有错误，只是在页面上出现的错误，是在action中定义的userService对象为空.
java.lang.NullPointerException
com.action.UserAction.getAll(UserAction.java:34)
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
java.lang.reflect.Method.invoke(Method.java:597)
com.opensymphony.xwork2.DefaultActionInvocation.invokeAction(DefaultActionInvocation.java:441)
com.opensymphony.xwork2.DefaultActionInvocation.invokeActionOnly(DefaultActionInvocation.java:280)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:243)
com.opensymphony.xwork2.interceptor.DefaultWorkflowInterceptor.doIntercept(DefaultWorkflowInterceptor.java:165)
com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
com.opensymphony.xwork2.validator.ValidationInterceptor.doIntercept(ValidationInterceptor.java:252)
org.apache.struts2.interceptor.validation.AnnotationValidationInterceptor.doIntercept(AnnotationValidationInterceptor.java:68)
com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
com.opensymphony.xwork2.interceptor.ConversionErrorInterceptor.intercept(ConversionErrorInterceptor.java:122)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:195)
com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:195)
com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
com.opensymphony.xwork2.interceptor.StaticParametersInterceptor.intercept(StaticParametersInterceptor.java:179)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
org.apache.struts2.interceptor.MultiselectInterceptor.intercept(MultiselectInterceptor.java:75)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
org.apache.struts2.interceptor.CheckboxInterceptor.intercept(CheckboxInterceptor.java:94)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
org.apache.struts2.interceptor.FileUploadInterceptor.intercept(FileUploadInterceptor.java:235)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
com.opensymphony.xwork2.interceptor.ModelDrivenInterceptor.intercept(ModelDrivenInterceptor.java:89)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
com.opensymphony.xwork2.interceptor.ScopedModelDrivenInterceptor.intercept(ScopedModelDrivenInterceptor.java:130)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
org.apache.struts2.interceptor.debugging.DebuggingInterceptor.intercept(DebuggingInterceptor.java:267)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
com.opensymphony.xwork2.interceptor.ChainingInterceptor.intercept(ChainingInterceptor.java:126)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
com.opensymphony.xwork2.interceptor.PrepareInterceptor.doIntercept(PrepareInterceptor.java:138)
com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
com.opensymphony.xwork2.interceptor.I18nInterceptor.intercept(I18nInterceptor.java:165)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
org.apache.struts2.interceptor.ServletConfigInterceptor.intercept(ServletConfigInterceptor.java:164)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
com.opensymphony.xwork2.interceptor.AliasInterceptor.intercept(AliasInterceptor.java:179)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
com.opensymphony.xwork2.interceptor.ExceptionMappingInterceptor.intercept(ExceptionMappingInterceptor.java:176)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
org.apache.struts2.impl.StrutsActionProxy.execute(StrutsActionProxy.java:52)
org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:488)
org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction(ExecuteOperations.java:77)
org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:91)
org.springframework.orm.hibernate3.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:198)
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:75)

Answer 3

spring事务里面放sessionFactory，位置不对，那应该放在哪里啊？？

Answer 4

你的USEDAO有没有继承HIBERNATESUPORT这个类啊

Answer 5

dao类是通过myEclipse工具导spring的时候自动生成的
public class UsersDAO extends HibernateDaoSupport {
private static final Log log = LogFactory.getLog(UsersDAO.class);
// property constants
public static final String TNAME = "tname";
public static final String TSEX = "tsex";
public static final String TAGE = "tage";
public static final String TPLACE = "tplace";
public static final String TEMAIL = "temail";
public static final String TPHONE = "tphone";
public static final String TPICTURE = "tpicture"; protected void initDao() {
// do nothing
} public void save(Users transientInstance) {
log.debug("saving Users instance");
try {
getHibernateTemplate().save(transientInstance);
log.debug("save successful");
} catch (RuntimeException re) {
log.error("save failed", re);
throw re;
}
} public void delete(Users persistentInstance) {
log.debug("deleting Users instance");
try {
getHibernateTemplate().delete(persistentInstance);
log.debug("delete successful");
} catch (RuntimeException re) {
log.error("delete failed", re);
throw re;
}
} public Users findById(java.lang.Integer id) {
log.debug("getting Users instance with id: " + id);
try {
Users instance = (Users) getHibernateTemplate().get(
"com.pojo.Users", id);
return instance;
} catch (RuntimeException re) {
log.error("get failed", re);
throw re;
}
} public List findByExample(Users instance) {
log.debug("finding Users instance by example");
try {
List results = getHibernateTemplate().findByExample(instance);
log.debug("find by example successful, result size: "
+ results.size());
return results;
} catch (RuntimeException re) {
log.error("find by example failed", re);
throw re;
}
} public List findByProperty(String propertyName, Object value) {
log.debug("finding Users instance with property: " + propertyName
+ ", value: " + value);
try {
String queryString = "from Users as model where model."
+ propertyName + "= ?";
return getHibernateTemplate().find(queryString, value);
} catch (RuntimeException re) {
log.error("find by property name failed", re);
throw re;
}
} public List findByTname(Object tname) {
return findByProperty(TNAME, tname);
} public List findByTsex(Object tsex) {
return findByProperty(TSEX, tsex);
} public List findByTage(Object tage) {
return findByProperty(TAGE, tage);
} public List findByTplace(Object tplace) {
return findByProperty(TPLACE, tplace);
} public List findByTemail(Object temail) {
return findByProperty(TEMAIL, temail);
} public List findByTphone(Object tphone) {
return findByProperty(TPHONE, tphone);
} public List findByTpicture(Object tpicture) {
return findByProperty(TPICTURE, tpicture);
} public List findAll() {
log.debug("finding all Users instances");
try {
String queryString = "from Users";
return getHibernateTemplate().find(queryString);
} catch (RuntimeException re) {
log.error("find all failed", re);
throw re;
}
} public Users merge(Users detachedInstance) {
log.debug("merging Users instance");
try {
Users result = (Users) getHibernateTemplate().merge(
detachedInstance);
log.debug("merge successful");
return result;
} catch (RuntimeException re) {
log.error("merge failed", re);
throw re;
}
} public void attachDirty(Users instance) {
log.debug("attaching dirty Users instance");
try {
getHibernateTemplate().saveOrUpdate(instance);
log.debug("attach successful");
} catch (RuntimeException re) {
log.error("attach failed", re);
throw re;
}
} public void attachClean(Users instance) {
log.debug("attaching clean Users instance");
try {
getHibernateTemplate().lock(instance, LockMode.NONE);
log.debug("attach successful");
} catch (RuntimeException re) {
log.error("attach failed", re);
throw re;
}
} public static UsersDAO getFromApplicationContext(ApplicationContext ctx) {
return (UsersDAO) ctx.getBean("UsersDAO");
}
}

Answer 6

放个action类的代码，你在action类里有userService的注入（读取）吗？

Answer 7

public class UserAction extends ActionSupport { private UsersService userService;
private List<Users> list; public List<Users> getList() {
return list;
} public void setList(List<Users> list) {
this.list = list;
} public UsersService getUserService() {
return userService;
} public void setUserService(UsersService userService) {
this.userService = userService;
} public String getAll() throws Exception {
// TODO Auto-generated method stub
this.list = userService.getAll();
System.out.println("集合长度:"+this.list.size());
for (int i = 0; i < this.list.size(); i++) {
System.out.println("姓名："+this.list.get(i).getTname());
}
return "main";
} public String update() throws Exception { return "main";
}
}

Answer 8

lz
context-param>
  <param-name>contextConfigLocation</param-name>
  <param-value>/WEB-INF/classes/app*.xml</param-value>
 </context-param>加载spring文件好像有点问题吧
如果是放在src下  可以是这样   <param-value>classpath:application.xml</param-value>
如果是放在WEB-INF下 那是这样 <param-value>/WEB-INF/application.xml</param-value>
lz在去检查下启动时在控制台
Initializing Spring root WebApplicationContext
是否有这个。

Answer 9

现在解决了
是导入hibernate的时候有个地方没有选上，所以有些配置文件也没有读取，
现在可以了，谢谢各位的帮忙！