@Autowiring
无法处理字段并且正在获取:
错误:
SEVERE: StandardWrapper.Throwable org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'contactController': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private net.viralpatel.contact.service.ContactService net.viralpatel.contact.controller.ContactController.contactService; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'contactServiceImpl': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private net.viralpatel.contact.dao.ContactDAO net.viralpatel.contact.service.ContactServiceImpl.contactDao; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'contactDAOImpl': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private org.hibernate.SessionFactory net.viralpatel.contact.dao.ContactDAOImpl.sessionFactory; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sessionFactory' defined in ServletContext resource [/WEB-INF/spring-servlet.xml]: Initialization of bean failed; nested exception is java.lang.NoClassDefFoundError: org/apache/commons/pool/impl/GenericObjectPool at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:285) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1074) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:517) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456) at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:291) at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:288) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:190) at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:580) at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:895) at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:425) at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:442) at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:458) at org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:339) at org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:306) at org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:127) at javax.servlet.GenericServlet.init(GenericServlet.java:160) at org.apache.catalina.core.StandardWrapper.initServlet(StandardWrapper.java:1201) at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1114) at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:1021) at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:4957) at org.apache.catalina.core.StandardContext$3.call(StandardContext.java:5284) at org.apache.catalina.core.StandardContext$3.call(StandardContext.java:5279) at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303) at java.util.concurrent.FutureTask.run(FutureTask.java:138) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) at java.lang.Thread.run(Thread.java:662)
我的web.xml是
<?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" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
<display-name>Spring3-Hibernate</display-name>
<welcome-file-list>
<welcome-file>list.html</welcome-file>
</welcome-file-list>
<servlet>
<servlet-name>spring</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>spring</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>
我的spring-servlet.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" xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:jee="http://www.springframework.org/schema/jee" xmlns:lang="http://www.springframework.org/schema/lang"
xmlns:p="http://www.springframework.org/schema/p" xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:util="http://www.springframework.org/schema/util"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee.xsd
http://www.springframework.org/schema/lang http://www.springframework.org/schema/lang/spring-lang.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd
http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util.xsd">
<context:annotation-config />
<context:component-scan base-package="net.viralpatel.contact" />
<bean id="jspViewResolver"
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="viewClass"
value="org.springframework.web.servlet.view.JstlView" />
<property name="prefix" value="/WEB-INF/jsp/" />
<property name="suffix" value=".jsp" />
</bean>
<bean id="messageSource"
class="org.springframework.context.support.ReloadableResourceBundleMessageSource">
<property name="basename" value="classpath:messages" />
<property name="defaultEncoding" value="UTF-8" />
</bean>
<bean id="propertyConfigurer"
class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"
p:location="/WEB-INF/jdbc.properties" />
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
destroy-method="close" p:driverClassName="${jdbc.driverClassName}"
p:url="${jdbc.databaseurl}" p:username="${jdbc.username}" p:password="${jdbc.password}" />
<bean id="sessionFactory"
class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="configLocation">
<value>classpath:hibernate.cfg.xml</value>
</property>
<property name="configurationClass">
<value>org.hibernate.cfg.AnnotationConfiguration</value>
</property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">${jdbc.dialect}</prop>
<prop key="hibernate.show_sql">true</prop>
</props>
</property>
</bean>
<tx:annotation-driven />
<bean id="transactionManager"
class="org.springframework.orm.hibernate3.HibernateTransactionManager">
<property name="sessionFactory" ref="sessionFactory" />
</bean>
</beans>
我的控制器是
package net.viralpatel.contact.controller;
import java.util.Map;
import net.viralpatel.contact.form.Contact;
import net.viralpatel.contact.service.ContactService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
@Controller
public class ContactController {
@Autowired
private ContactService contactService;
@RequestMapping("/index")
public String listContacts(Map<String, Object> map) {
map.put("contact", new Contact());
map.put("contactList", contactService.listContact());
return "contact";
}
@RequestMapping(value = "/add", method = RequestMethod.POST)
public String addContact(@ModelAttribute("contact")
Contact contact, BindingResult result) {
contactService.addContact(contact);
return "redirect:/index";
}
@RequestMapping("/delete/{contactId}")
public String deleteContact(@PathVariable("contactId")
Integer contactId) {
contactService.removeContact(contactId);
return "redirect:/index";
}
}
我的服务类是
package net.viralpatel.contact.service;
import java.util.List;
import net.viralpatel.contact.form.Contact;
public interface ContactService {
public void addContact(Contact contact);
public List<Contact> listContact();
public void removeContact(Integer id);
}
服务类impl是
package net.viralpatel.contact.service;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import net.viralpatel.contact.dao.ContactDAO;
import net.viralpatel.contact.form.Contact;
@Service
public class ContactServiceImpl implements ContactService {
@Autowired
private ContactDAO contactDao;
@Transactional
public void addContact(Contact contact) {
contactDao.addContact(contact);
}
@Transactional
public List<Contact> listContact() {
return contactDao.listContact();
}
@Transactional
public void removeContact(Integer id) {
contactDao.removeContact(id);
}
}
我正在努力让@Autowiring工作,但它无法正常工作,有什么建议或线索可以解决它的工作方式吗?
答案 0 :(得分:8)
您的例外情况很明确:
java.lang.NoClassDefFoundError:org / apache / commons / pool / impl / GenericObjectPool
这意味着您的类路径中没有commons-pool.jar
。添加它。 (在WEB-INF/lib
)
答案 1 :(得分:1)
问题不是自动装配,而是NoClassDefFound:
注入自动连接的依赖项失败;嵌套异常是......
在ServletContext资源[/WEB-INF/spring-servlet.xml]中定义名称为'sessionFactory'的bean创建错误:bean的初始化失败; 嵌套异常是java.lang.NoClassDefFoundError:org / apache / commons / pool / impl / GenericObjectPool
确保commons-pool的JAR在类路径上。
答案 2 :(得分:1)
使用网络应用程序,在类路径中使用jar是不够的。它也必须在正确的位置。确保jar位于WEB-INF/lib
目录中,并且弹簧罐也是如此。如果您将其中一个置于容器的lib
目录中,则可能会遇到类加载器问题。
通常,容器安装和webapp中的每个lib
目录都有一个单独的类加载器,它们按层次结构组织。如果父类加载器中的类引用了子类中的类,您将看到此问题。
我的规则是只将事物放在WEB-INF/lib
中。只有一次我看到了一个很好的理由来改变,既不添加也不删除也不升级任何容器lib
目录的内容。
答案 3 :(得分:0)
我认为这是来自here的示例我可以毫无问题地运行此示例。 此示例使用maven。确保你的pom.xml中有这个
<dependency>
<groupId>commons-pool</groupId>
<artifactId>commons-pool</artifactId>
<version>20030825.183949</version>
</dependency>
可能是因为它的旧版本没有实现类?另外,当你解压缩你的commons-pool.jar时(你提到了common-pool.jar,猜猜拼写错误?)你看到里面有GenericObjectPool.class吗?
答案 4 :(得分:0)
这是由于注入自动连接的依赖项失败,即pom.xml中的hibernate-entitymanager bean
在pom.xml中添加以下依赖项:
hibernate-entitymanager / 3.2.0.ga jar file
再次mvn clean install然后通过以下命令运行:
mvn org.mortbay.jetty:maven-jetty-plugin:run
通过命令提示符避免丢失与java路径相关的异常