我正在使用 Spring 3.1.4
控制器类
package com.demo.scheduler.controller;
import java.util.Map;
import com.demo.scheduler.service.SchedulerService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
@Controller
public class SchedulerController {
private SchedulerService service;
@Autowired
public SchedulerController(SchedulerService service) {
this.service = service;
}
@RequestMapping(value = "/tasklist",method = RequestMethod.GET)
public String listTask(Map<String, Object> model) {
model.put("task", service.getTask());
return "tasklist";
}
}
服务实施
package com.demo.scheduler.service;
import com.demo.scheduler.TaskConfig;
@Service
@Transactional(propagation = Propagation.SUPPORTS, readOnly = true)
public class SchedulerServiceImpl implements SchedulerService {
@Autowired
public SchedulerDAO schedulerDAO;
@Override
@Transactional(propagation = Propagation.REQUIRED, readOnly = false)
public List<TaskConfig> getTask() {
return schedulerDAO.getTask();
}
}
DAO 实施
package com.demo.scheduler.dao;
import com.demo.scheduler.TaskConfig;
import java.util.List;
import org.hibernate.SessionFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Repository;
@Repository
public class HibernateDAO implements SchedulerDAO {
@Autowired
private SessionFactory sessionFactory;
public HibernateDAO(SessionFactory sessionFactory) {
this.sessionFactory = sessionFactory;
}
@SuppressWarnings("unchecked")
@Override
public List<TaskConfig> getTask() {
return sessionFactory.getCurrentSession().createCriteria(
TaskConfig.class).list();
}
}
web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app id="WebApp_ID" version="2.4"
xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
<display-name>demoscheduler</display-name>
<welcome-file-list>
<welcome-file>index.html</welcome-file>
<welcome-file>index.htm</welcome-file>
<welcome-file>index.jsp</welcome-file>
<welcome-file>default.html</welcome-file>
<welcome-file>default.htm</welcome-file>
<welcome-file>default.jsp</welcome-file>
</welcome-file-list>
<servlet>
<servlet-name>demo</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet
</servlet-class></servlet>
<servlet-mapping>
<servlet-name>demo</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping><session-config>
<session-timeout>60</session-timeout>
</session-config>
</web-app>
演示-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:context="http://www.springframework.org/schema/context"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-3.0.xsd">
<context:component-scan base-package="com.demo.scheduler" />
<context:annotation-config />
<tx:annotation-driven />
<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="propertyConfigurer"
class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="location">
<value>/WEB-INF/resources/hibernate.properties
</value>
</property>
</bean>
<bean class="org.springframework.orm.hibernate3.LocalSessionFactoryBean"
id="sessionFactory">
<property name="dataSource" ref="dataSource">
</property>
<property name="configLocations">
<list>
<value>/WEB-INF/resources/schedulerTask.hbm.xml
</value>
</list>
</property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">${hibernate.dialect}</prop>
<prop key="hibernate.show_sql">${hibernate.show_sql}</prop>
<prop key="hibernate.format_sql">${hibernate.format_sql}</prop>
<prop key="hibernate.connection.provider_class">${hibernate.connection.provider_class}
</prop>
<prop key="hibernate.c3p0.acquire_increment">${hibernate.c3p0.acquire_increment}
</prop>
<prop key="hibernate.c3p0.idle_test_period">${hibernate.c3p0.idle_test_period}
</prop>
<prop key="hibernate.c3p0.max_size">${hibernate.c3p0.max_size}
</prop>
<prop key="hibernate.c3p0.max_statements">${hibernate.c3p0.max_statements}
</prop>
<prop key="hibernate.c3p0.min_size">${hibernate.c3p0.min_size}
</prop>
<prop key="hibernate.c3p0.timeout">${hibernate.c3p0.timeout}
</prop>
</props>
</property>
</bean>
<bean class="org.springframework.jdbc.datasource.DriverManagerDataSource"
id="dataSource">
<property name="driverClassName" value="${hibernate.connection.driver_class}" />
<property name="url" value="${hibernate.connection.url}" />
<property name="username" value="${hibernate.connection.username}" />
<property name="password" value="${hibernate.connection.password}" />
</bean>
<bean id="transactionManager"
class="org.springframework.orm.hibernate3.HibernateTransactionManager">
<property name="sessionFactory" ref="sessionFactory" />
</bean>
</beans>
更新代码后,我收到以下错误:
9544 [http-4186-2] 错误 org.springframework.web.servlet.DispatcherServlet - 上下文初始化失败 org.springframework.beans.factory.BeanCreationException:创建名为“schedulerController”的 bean 时出错:注入自动装配的依赖项失败;嵌套异常是 org.springframework.beans.factory.BeanCreationException:无法自动装配字段:私有 com.demo.scheduler.service.SchedulerService com.demo.scheduler.controller.SchedulerController.service;嵌套异常是 org.springframework.beans.factory.BeanCreationException:创建名为“schedulerServiceImpl”的 bean 时出错:注入自动装配的依赖项失败;嵌套异常是 org.springframework.beans.factory.BeanCreationException:无法自动装配字段:public com.demo.scheduler.dao.SchedulerDAO com.demo.scheduler。service.SchedulerServiceImpl.schedulerDAO;嵌套异常是 org.springframework.beans.factory.BeanCreationException:创建名为“hibernateDAO”的 bean 时出错:注入自动装配的依赖项失败;嵌套异常是 org.springframework.beans.factory.BeanCreationException:无法自动装配字段:私有 org.hibernate.SessionFactory com.demo.scheduler.dao.HibernateDAO.sessionFactory;嵌套异常是 org.springframework.beans.factory.BeanCreationException:在 ServletContext 资源 [/WEB-INF/applicationContext.xml] 中创建名称为“sessionFactory”的 bean 时出错:调用 init 方法失败;嵌套异常是 org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor 处的 java.lang.NullPointerException。ErrorReportValve.invoke(ErrorReportValve.java:102) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:263) at org .apache.coyote.http11.Http11Processor.process(Http11Processor.java:844) 在 org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:584) 在 org.apache.tomcat.util.net.JIoEndpoint $Worker.run(JIoEndpoint.java:447) at java.lang.Thread.run(Thread.java:662) 原因:org.springframework.beans.factory.BeanCreationException:无法自动装配字段:私有 com.demo.scheduler .service.SchedulerService com.demo.scheduler.controller.SchedulerController.service;嵌套异常是 org.springframework.beans.factory.BeanCreationException:创建名为“schedulerServiceImpl”的 bean 时出错:注入自动装配的依赖项失败;嵌套异常是 org.springframework.beans.factory.BeanCreationException:无法自动装配字段:public com.demo.scheduler.dao.SchedulerDAO com.demo.scheduler.service.SchedulerServiceImpl.schedulerDAO;嵌套异常是 org.springframework.beans.factory.BeanCreationException:创建名为“hibernateDAO”的 bean 时出错:注入自动装配的依赖项失败;嵌套异常是 org.springframework.beans.factory.BeanCreationException:无法自动装配字段:私有 org.hibernate.SessionFactory com.demo.scheduler.dao.HibernateDAO.sessionFactory;嵌套异常是 org.springframework.beans.factory.BeanCreationException:创建名称为“sessionFactory”的 bean 时出错 在 ServletContext 资源 [/WEB-INF/applicationContext.xml] 中定义:调用 init 方法失败;嵌套异常是 org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java: org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java: 92) 在 org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:284) ... 29 更多原因:org.springframework.beans.factory.BeanCreationException:创建名为“schedulerServiceImpl”的 bean 时出错:注入自动装配的依赖项失败;嵌套异常是 org.springframework.beans.factory。BeanCreationException:无法自动装配字段:public com.demo.scheduler.dao.SchedulerDAO com.demo.scheduler.service.SchedulerServiceImpl.schedulerDAO;嵌套异常是 org.springframework.beans.factory.BeanCreationException:创建名为“hibernateDAO”的 bean 时出错:注入自动装配的依赖项失败;嵌套异常是 org.springframework.beans.factory.BeanCreationException:无法自动装配字段:私有 org.hibernate.SessionFactory com.demo.scheduler.dao.HibernateDAO.sessionFactory;嵌套异常是 org.springframework.beans.factory.BeanCreationException:在 ServletContext 资源 [/WEB-INF/applicationContext.xml] 中创建名称为“sessionFactory”的 bean 时出错:调用 init 方法失败;嵌套异常是 org.springframework 中的 java.lang.NullPointerException。AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:485) ... 31 更多原因:org.springframework.beans.factory.BeanCreationException:无法自动装配字段:public com.demo.scheduler.dao.SchedulerDAO com.demo.scheduler .service.SchedulerServiceImpl.schedulerDAO;嵌套异常是 org.springframework.beans.factory.BeanCreationException:创建名为“hibernateDAO”的 bean 时出错:注入自动装配的依赖项失败;嵌套异常是 org.springframework.beans.factory.BeanCreationException:无法自动装配字段:私有 org.hibernate.SessionFactory com.demo.scheduler.dao.HibernateDAO.sessionFactory;嵌套异常是 org.springframework.beans.factory.BeanCreationException:创建名称为“sessionFactory”的 bean 时出错 在 ServletContext 资源 [/WEB-INF/applicationContext.xml] 中定义:调用 init 方法失败;嵌套异常是 org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java: org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java: 92) 在 org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:284) ... 44 更多原因:org.springframework.beans.factory.BeanCreationException:创建名为“hibernateDAO”的 bean 时出错:注入自动装配的依赖项失败;嵌套异常是 org.springframework.beans.factory。BeanCreationException:无法自动装配字段:私有 org.hibernate.SessionFactory com.demo.scheduler.dao.HibernateDAO.sessionFactory; 嵌套异常是 org.springframework.beans.factory.BeanCreationException:在 ServletContext 资源 [/WEB-INF/applicationContext.xml] 中创建名称为“sessionFactory”的 bean 时出错:调用 init 方法失败;嵌套异常是 org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1106) 的 org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:287) 的 java.lang.NullPointerException在 org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory。DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:813) at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:730) at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor. java:485) ... 46 更多原因:org.springframework.beans.factory.BeanCreationException:无法自动装配字段:私有 org.hibernate.SessionFactory com.demo.scheduler.dao.HibernateDAO.sessionFactory; 嵌套异常是 org.springframework.beans.factory.BeanCreationException:在 ServletContext 资源 [/WEB-INF/applicationContext.xml] 中创建名称为“sessionFactory”的 bean 时出错:调用 init 方法失败;嵌套异常是java。org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:92) 中 org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:513) 的 lang.NullPointerException。 springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:284) ... 57 更多原因:org.springframework.beans.factory.BeanCreationException:在 ServletContext 资源中定义名称为“sessionFactory”的 bean 创建错误 [/ WEB-INF/applicationContext.xml]: init 方法调用失败;嵌套异常是 org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory 中的 java.lang.NullPointerException。