我是春天和新手的新手，一直在研究和探索这些技术为企业发展带来的动力。但是我遇到了一个试图运行的程序，它不断抛出以下错误。我在这里发现了类似的问题并完成了所有建议，但仍然得到相同的错误。
**WARNING: Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'productController': Unsatisfied dependency expressed through field 'itemMasterDao': Cannot find class [org.apache.commons.dbcp2.BasicDataSource] for bean with name 'dataSource' defined in ServletContext resource [/WEB-INF/inventory-servlet.xml]; nested exception is java.lang.ClassNotFoundException: org.apache.commons.dbcp2.BasicDataSource; nested exception is org.springframework.beans.factory.CannotLoadBeanClassException: Cannot find class [org.apache.commons.dbcp2.BasicDataSource] for bean with name 'dataSource' defined in ServletContext resource [/WEB-INF/inventory-servlet.xml]; nested exception is java.lang.ClassNotFoundException:** org.apache.commons.dbcp2.BasicDataSource
Aug 30, 2016 12:14:29 AM org.springframework.web.servlet.DispatcherServlet initServletBean
SEVERE: Context initialization failed
org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'productController': Unsatisfied dependency expressed through field 'itemMasterDao': Cannot find class [org.apache.commons.dbcp2.BasicDataSource] for bean with name 'dataSource' defined in ServletContext resource [/WEB-INF/inventory-servlet.xml]; nested exception is java.lang.ClassNotFoundException: org.apache.commons.dbcp2.BasicDataSource; nested exception is org.springframework.beans.factory.CannotLoadBeanClassException: Cannot find class [org.apache.commons.dbcp2.BasicDataSource] for bean with name 'dataSource' defined in ServletContext resource [/WEB-INF/inventory-servlet.xml]; nested exception is java.lang.ClassNotFoundException: org.apache.commons.dbcp2.BasicDataSource
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:573)
at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:88)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:350)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1214)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:543)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:775)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:861)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:541)
at org.springframework.web.servlet.FrameworkServlet.configureAndRefreshWebApplicationContext(FrameworkServlet.java:668)
at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:634)
at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:682)
at org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:553)
at org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:494)
at org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:136)
at javax.servlet.GenericServlet.init(GenericServlet.java:158)
at org.apache.catalina.core.StandardWrapper.initServlet(StandardWrapper.java:1238)
at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1151)
at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:1038)
at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:5027)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5337)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:147)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1407)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1397)
at java.util.concurrent.FutureTask.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: org.springframework.beans.factory.CannotLoadBeanClassException: Cannot find class [org.apache.commons.dbcp2.BasicDataSource] for bean with name 'dataSource' defined in ServletContext resource [/WEB-INF/inventory-servlet.xml]; nested exception is java.lang.ClassNotFoundException: org.apache.commons.dbcp2.BasicDataSource
at org.springframework.beans.factory.support.AbstractBeanFactory.resolveBeanClass(AbstractBeanFactory.java:1357)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.determineTargetType(AbstractAutowireCapableBeanFactory.java:628)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.predictBeanType(AbstractAutowireCapableBeanFactory.java:597)
at org.springframework.beans.factory.support.AbstractBeanFactory.isFactoryBean(AbstractBeanFactory.java:1450)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doGetBeanNamesForType(DefaultListableBeanFactory.java:446)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeanNamesForType(DefaultListableBeanFactory.java:424)
at org.springframework.beans.factory.BeanFactoryUtils.beanNamesForTypeIncludingAncestors(BeanFactoryUtils.java:220)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.findAutowireCandidates(DefaultListableBeanFactory.java:1193)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1048)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1018)
inventory-servlet.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">
<context:component-scan base-package="com.chills.hspring.product.controller, com.chills.hspring.product.dao" />
<bean id="itemMasterDao" class="com.chills.hspring.product.dao.ItemMasterDAOImpl">
<constructor-arg>
<ref bean="sessionFactory" />
</constructor-arg>
</bean>
<bean id="dataSource" class="org.apache.commons.dbcp2.BasicDataSource">
<property name="driverClassName" value="com.mysql.jdbc.Driver" />
<property name="url" value="jdbc:mysql://localhost:3306/test" />
<property name="username" value="root" />
<property name="password" value="j123456" />
</bean>
<bean id="sessionFactory" Class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="configLocation" value="classpath:hibernate.cfg.xml" />
</bean>
<tx:annotation-driven />
<bean id="transactionManager" class="org.springframework.orm.hibernate5.HibernateTransactionManager">
<property name="sessionFactory" ref="sessionFactory" />
</bean>
<bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/Pages/"></property>
<property name="suffix" value=".jsp"></property>
</bean>
</beans>
web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app 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" >
<servlet>
<servlet-name>inventory</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>inventory</servlet-name>
<url-pattern>*.do</url-pattern>
</servlet-mapping>
</web-app>
hibernate.cfg.xml
<?xml version='1.0' encoding='utf-8'?>
<!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD 3.0//EN" "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<property name="connection.driver_class">
com.mysql.jdbc.Driver
</property>
<property name="connection.url">
jdbc:mysql://localhost:3306/test
</property>
<property name="connection.pool_size">1</property>
<!-- SQL dialect -->
<property name="dialect">
org.hibernate.dialect.MySQLDialect
</property>
<!-- Enable Hibernate's automatic session context management -->
<property name="current_session_context_class">thread</property>
<!-- Disable the second-level cache -->
<property name="cache.provider_class">
org.hibernate.cache.NoCacheProvider
</property>
<!-- Display all generated SQL to stdout -->
<property name="show_sql">true</property>
<mapping class="com.chills.hspring.dto.ItemMaster" />
</session-factory>
</hibernate-configuration>
ItemMasterDAOImpl.java
package com.chills.hspring.product.dao;
import java.util.List;
import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.springframework.transaction.annotation.Transactional;
import com.chills.hspring.dto.ItemMaster;
@Transactional
public class ItemMasterDAOImpl implements ItemMasterDAO {
private SessionFactory sessionFactory;
public ItemMasterDAOImpl(SessionFactory sessionFactory) {
this.sessionFactory = sessionFactory;
}
@Override
public void add(ItemMaster item) {
Session session = sessionFactory.getCurrentSession();
try {
session.beginTransaction();
session.save(item);
}catch(HibernateException e) {
e.printStackTrace();
session.getTransaction().rollback();
}
session.getTransaction().commit();
}
@Override
public void update(ItemMaster item) {
Session session = sessionFactory.getCurrentSession();
try {
System.out.println("IN UPDATE");
session.beginTransaction();
session.saveOrUpdate(item);
}catch(Exception e) {
e.printStackTrace();
session.getTransaction().rollback();
}
session.getTransaction().commit();
}
@Override
public ItemMaster getItem(Long id) {
Session session = sessionFactory.getCurrentSession();
ItemMaster item = null;
try {
System.out.println("IN GETITEM");
session.beginTransaction();
item = (ItemMaster) session.get(ItemMaster.class, id);
}catch(HibernateException e) {
e.printStackTrace();
session.getTransaction().rollback();
}
session.getTransaction().commit();
return item;
}
@Override
public void delete(Long id) {
Session session = sessionFactory.getCurrentSession();
session.beginTransaction();
ItemMaster item = (ItemMaster)session.get(ItemMaster.class, id);
if(null != item) {
session.delete(item);
}
session.getTransaction().commit();
}
@SuppressWarnings({ "deprecation", "unchecked" })
@Override
public List<ItemMaster> list() {
Session session = sessionFactory.getCurrentSession();
session.beginTransaction();
List<ItemMaster> items = null;
try {
System.out.println("IN LIST");
items = (List<ItemMaster>)session.createQuery("from ItemMaster").list();
}catch(HibernateException e) {
e.printStackTrace();
session.getTransaction().rollback();
}
session.getTransaction().commit();
return items;
}
}
ItemMasterDAO.java
package com.chills.hspring.product.dao;
import java.util.List;
import com.chills.hspring.dto.*;
public interface ItemMasterDAO {
public List<ItemMaster> list();
public void add(ItemMaster item);
public void update(ItemMaster item);
public ItemMaster getItem(Long id);
public void delete(Long id);
}
ItemMaster.java
package com.chills.hspring.dto;
import java.io.Serializable;
import java.util.Date;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.Table;
import javax.persistence.Temporal;
import javax.persistence.TemporalType;
@Entity
@Table(name="ItemMaster")
public class ItemMaster implements Serializable {
private static final long serialVersionUID = 45369355259515150L;
private Long item_code;
private String item_name;
private double price;
private int qty;
@Temporal(TemporalType.DATE)
@Column (name="createdOn")
private Date createdOn;
public Date getCreatedOn()
{
return createdOn;
}
public void setCreatedOn(Date createdOn)
{
this.createdOn = createdOn;
}
@Id
@GeneratedValue
@Column(name="item_code")
public Long getItem_code()
{
return item_code;
}
public void setItem_code(Long item_code)
{
this.item_code = item_code;
}
@Column(name="item_name")
public String getItem_name()
{
return item_name;
}
public void setItem_name(String item_name)
{
this.item_name = item_name;
}
@Column(name="price")
public double getPrice()
{
return price;
}
public void setPrice(double price)
{
this.price = price;
}
@Column (name="qty")
public int getQty()
{
return qty;
}
public void setQty(int qty)
{
this.qty = qty;
}
}
ProductController.java
package com.chills.hspring.product.controller;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.portlet.ModelAndView;
import com.chills.hspring.product.dao.*;
import com.chills.hspring.dto.ItemMaster;
@Controller
public class ProductController {
@Autowired
private ItemMasterDAO itemMasterDao;
@RequestMapping(value="/list")
public ModelAndView list() {
List<ItemMaster> itemList = itemMasterDao.list();
ModelAndView model = new ModelAndView("itemMasterList");
model.addObject("itemList",itemList);
return model;
}
@RequestMapping(value="/loadAddForm")
public ModelAndView add() {
ModelAndView model = new ModelAndView("ItemMasterAdd");
ItemMaster item = new ItemMaster();
model.addObject("item", item);
List<ItemMaster> itemList = itemMasterDao.list();
model.addObject("itemList",itemList);
return model;
}
@RequestMapping(value="/edit")
public ModelAndView edit(@RequestParam(value="id", required = true)Long id) {
System.out.println("Id = "+ id);
ModelAndView model = new ModelAndView("ItemMasterAdd");
ItemMaster item = itemMasterDao.getItem(id);
model.addObject("item", item);
List<ItemMaster>itemList = itemMasterDao.list();
model.addObject("itemList",itemList);
return model;
}
@RequestMapping(name="/delete")
public ModelAndView delete(@RequestParam(value="id", required = true)Long id) {
ModelAndView model = new ModelAndView("ItemMasterAdd");
itemMasterDao.delete(id);
List<ItemMaster> itemList = itemMasterDao.list();
model.addObject("itemList", itemList);
return model;
}
@RequestMapping(name="/save", method = RequestMethod.POST)
public ModelAndView save(@ModelAttribute("item")ItemMaster item) {
System.out.println(item.getItem_name());
if(null != item)
itemMasterDao.add(item);
ModelAndView model = new ModelAndView("ItemMasterAdd");
item = new ItemMaster();
model.addObject("item",item);
List<ItemMaster> itemList = itemMasterDao.list();
model.addObject("itemList", itemList);
return model;
}
@RequestMapping(value = "/update", method = RequestMethod.POST)
public ModelAndView update(@ModelAttribute("item")ItemMaster item) {
System.out.println(item.getItem_name());
if(null != item)
itemMasterDao.update(item);
ModelAndView model = new ModelAndView("ItemMasterAdd");
item = new ItemMaster();
model.addObject("item",item);
List<ItemMaster> itemList = itemMasterDao.list();
model.addObject("itemList", itemList);
return model;
}
}
答案 0 :(得分：0)
org.apache.commons.dbcp2.BasicDataSource缺少JAR
将此添加到pom.xml依赖项或download jar并将其放在类路径中
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-dbcp2</artifactId>
<version>2.1.1</version>
</dependency>