严重: Exception sending context initialized event to listener instance of class or

Question

启动 tomcat6.0 就报这个错。甚是纠结，删除了asm-2.2.3.jar 文件，导入了 commons-pool-1.3.jar Struts1  Spring2.5  hibernate3.2现附上 错误信息  web.xml   ,applicationContext.xml。错误信息：严重: Exception sending context initialized event to listener instance of class org.springframework.web.context.ContextLoaderListener
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userService' defined in ServletContext resource [/WEB-INF/applicationContext.xml]: Initialization of bean failed; nested exception is org.springframework.beans.TypeMismatchException: Failed to convert property value of type [com.ssh.dao.impl.UserDAO] to required type [com.ssh.dao.IuserDAO] for property 'userDAO'; nested exception is java.lang.IllegalArgumentException: Cannot convert value of type [com.ssh.dao.impl.UserDAO] to required type [com.ssh.dao.IuserDAO] for property 'userDAO': no matching editors or conversion strategy found
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:478)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory$1.run(AbstractAutowireCapableBeanFactory.java:409)
at java.security.AccessController.doPrivileged(Native Method)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:380)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:264)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:220)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:261)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:185)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:164)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:429)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:729)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:381)
at org.springframework.web.context.ContextLoader.createWebApplicationContext(ContextLoader.java:255)
at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:199)
at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:45)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:3827)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4334)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:791)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:771)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:525)
at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:920)
at org.apache.catalina.startup.HostConfig.deployDirectories(HostConfig.java:883)
at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:492)
at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1138)
at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:311)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:117)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1053)
at org.apache.catalina.core.StandardHost.start(StandardHost.java:719)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443)
at org.apache.catalina.core.StandardService.start(StandardService.java:516)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:710)
at org.apache.catalina.startup.Catalina.start(Catalina.java:566)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:288)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:413)
Caused by: org.springframework.beans.TypeMismatchException: Failed to convert property value of type [com.ssh.dao.impl.UserDAO] to required type [com.ssh.dao.IuserDAO] for property 'userDAO'; nested exception is java.lang.IllegalArgumentException: Cannot convert value of type [com.ssh.dao.impl.UserDAO] to required type [com.ssh.dao.IuserDAO] for property 'userDAO': no matching editors or conversion strategy found
at org.springframework.beans.BeanWrapperImpl.convertForProperty(BeanWrapperImpl.java:391)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.convertForProperty(AbstractAutowireCapableBeanFactory.java:1287)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1248)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1008)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:470)
... 38 more
Caused by: java.lang.IllegalArgumentException: Cannot convert value of type [com.ssh.dao.impl.UserDAO] to required type [com.ssh.dao.IuserDAO] for property 'userDAO': no matching editors or conversion strategy found
at org.springframework.beans.TypeConverterDelegate.convertIfNecessary(TypeConverterDelegate.java:219)
at org.springframework.beans.TypeConverterDelegate.convertIfNecessary(TypeConverterDelegate.java:138)
at org.springframework.beans.BeanWrapperImpl.convertForProperty(BeanWrapperImpl.java:386)
... 42 moreweb.xml <context-param>
 <param-name>contextConfigLocation</param-name>
 <param-value>/WEB-INF/applicationContext.xml</param-value>
  </context-param>   <listener>
    <listener-class>
          org.springframework.web.context.ContextLoaderListener
    </listener-class>
  </listener>

applicationContext.xml<?xml version="1.0" encoding="UTF-8"?>
<beans
xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd"> <bean id="datasource"
class="org.apache.commons.dbcp.BasicDataSource">
<property name="driverClassName"
value="com.mysql.jdbc.Driver">
</property>
<property name="url" value="jdbc:mysql://localhost:3306/ssh"></property>
<property name="username" value="root"></property>
<property name="password" value="123456"></property>
</bean>
<bean id="sessionFactory"
class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
<property name="dataSource">
<ref bean="datasource" />
</property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">
org.hibernate.dialect.MySQLDialect
</prop>
</props>
</property>
<property name="mappingResources">
<list>
<value>com/ssh/user/User.hbm.xml</value></list>
</property></bean>

<bean name="userService" class="com.ssh.service.impl.UserService" >
<property name="userDAO">
<ref bean="UserDAO"/>
</property>
</bean>
<bean id="UserDAO" class="com.ssh.dao.impl.UserDAO">
<property name="sessionFactory">
<ref bean="sessionFactory" />
</property>
</bean>



</beans>
 

Answer 1

问题和 http://topic.csdn.net/u/20110816/23/5ad3ab3e-98f6-43da-8ac1-e1e29dc4ca41.html?seed=424402433&r=79395505#r_79395505  报错一样。估计都是从网上找的一短代码。为啥报错呢？

Answer 2

刚才发现 userdao 没有实现 iuserdao接口。但是我现在实现了 好像还是包一样的错。package com.ssh.dao;
import java.util.List;import com.ssh.user.User;public interface IuserDAO {
public User findById(Integer id);
public List findByUsername(Object username);
public void save(User user);
}

Answer 3

package com.ssh.dao.impl;import java.util.List;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.hibernate.LockMode;
import org.springframework.context.ApplicationContext;
import org.springframework.orm.hibernate3.support.HibernateDaoSupport;import com.ssh.dao.IuserDAO;
import com.ssh.user.User;public class UserDAO extends HibernateDaoSupport implements IuserDAO{
private static final Log log = LogFactory.getLog(UserDAO.class);
// property constants
public static final String USERNAME = "username";
public static final String PASSWORD = "password";
private IuserDAO userDAO;
protected void initDao() {
// do nothing
}
public void save(User user) {
log.debug("saving User instance");
try {
getHibernateTemplate().save(user);
log.debug("save successful");
} catch (RuntimeException re) {
log.error("save failed", re);
throw re;
}
} public void delete(User persistentInstance) {
log.debug("deleting User instance");
try {
getHibernateTemplate().delete(persistentInstance);
log.debug("delete successful");
} catch (RuntimeException re) {
log.error("delete failed", re);
throw re;
}
} public User findById(java.lang.Integer id) {
log.debug("getting User instance with id: " + id);
try {
User instance = (User) getHibernateTemplate().get(
"com.ssh.user.User", id);
return instance;
} catch (RuntimeException re) {
log.error("get failed", re);
throw re;
}
} public List findByExample(User instance) {
log.debug("finding User 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 User instance with property: " + propertyName
+ ", value: " + value);
try {
String queryString = "from User 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 findByUsername(Object username) {
return findByProperty(USERNAME, username);
} public List findByPassword(Object password) {
return findByProperty(PASSWORD, password);
} public List findAll() {
log.debug("finding all User instances");
try {
String queryString = "from User";
return getHibernateTemplate().find(queryString);
} catch (RuntimeException re) {
log.error("find all failed", re);
throw re;
}
} public User merge(User detachedInstance) {
log.debug("merging User instance");
try {
User result = (User) getHibernateTemplate().merge(detachedInstance);
log.debug("merge successful");
return result;
} catch (RuntimeException re) {
log.error("merge failed", re);
throw re;
}
} public void attachDirty(User instance) {
log.debug("attaching dirty User instance");
try {
getHibernateTemplate().saveOrUpdate(instance);
log.debug("attach successful");
} catch (RuntimeException re) {
log.error("attach failed", re);
throw re;
}
} public void attachClean(User instance) {
log.debug("attaching clean User instance");
try {
getHibernateTemplate().lock(instance, LockMode.NONE);
log.debug("attach successful");
} catch (RuntimeException re) {
log.error("attach failed", re);
throw re;
}
} public static UserDAO getFromApplicationContext(ApplicationContext ctx) {
return (UserDAO) ctx.getBean("UserDAO");
}
}

Answer 4

他大爷的，在晚上找了一段代码，简直就是坑爹。最后发现：
          <bean name="userService" class="com.ssh.service.impl.UserService" >
<property name="userDAO">
<ref bean="UserDAO"/>
</property>
 </bean>bean 不应该是name，而是 Id=“userService”