Mysql “调试”；org.springframework.beans.factory.beanCreationException”的；弹簧误差

我正在尝试创建自己的网上商店。我对创建bean有问题

我的套餐如下：

控制器

package com.emusicstore.controller;

import java.io.IOException;
import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;

import com.emusicstore.dao.ProductDao;
import com.emusicstore.model.Product;

@Controller
public class HomeController {

    @Autowired
    private ProductDao productDao;

    @RequestMapping("/")
    public String home(){
        return "home";
    }

    @RequestMapping("/productList")
    public String getProducts(Model model) {
        List<Product> products = productDao.getAllProducts();
        model.addAttribute("products", products);

        return "productList";
    }

此外，我还有一个jdbc.properties文件，其中包含有关用户名、密码等的信息，可用于连接MySQL。 我认为上述文件是正确的

applicationContext.xml（我代码的一部分）

<beans profile="dev">
        <context:property-placeholder location="jdbc.properties" />
        <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
            destroy-method="close">
            <property name="driverClassName" value="${jdbc.driver}"></property>
            <property name="url" value="${jdbc.url}"></property>
            <property name="password" value="${jdbc.password}"></property>
            <property name="username" value="${jdbc.username}"></property>
        </bean>
        <bean id="sessionFactory"
            class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">

            <property name="dataSource" ref="dataSource"></property>
            <property name="hibernateProperties">
                <props>
                    <prop key="hibernate.dialect">org.hibernate.dialect.MySQL5Dialect</prop>
                    <prop key="hibernate.hbm2ddl.auto">update</prop>
                    <prop key="hibernate.show_sql">true</prop>
                    <prop key="hibernate.format_sql">true</prop>
                </props>
            </property>
            <property name="packagesToScan">
                <list>
                    <value>com.emusicstore.*</value>
                </list>
            </property>
        </bean>
        <bean id="transactionManager"
            class="org.springframework.orm.hibernate4.HibernateTransactionManager">
            <property name="sessionFactory" ref="sessionFactory"></property>
        </bean>
        <!-- Is <tx:annotation-driven /> is necessary in this file?? -->
</beans>

第一个错误是在创建bean“homeController”时发生的。 无法自动连线字段：private com.emusicstore.dao.ProductDao com.emusicstore.controller.HomeController.ProductDao

我的问题

1） applicationContext.xml 我必须放在哪个文件上？现有路径正确吗，或者我必须特别修改它（例如com.emusicstore.dao）？在这个列表中，我必须列出我的dao的整个路径，model

2） dispatcher-servlet.xml 对于上下文的正确路径，同样的问题是：组件扫描。在基本包上，我可以仅将包指定给我的控制器（com.emusicstore.controller）吗

我搜索了以前的帖子，但我没有解决我的问题

事先谢谢你，迈克

编辑

（我们的）变更摘要

applicationContext.xml

package com.emusicstore.impl;

import java.util.List;

import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.transaction.annotation.Transactional;

import com.emusicstore.dao.ProductDao;
import com.emusicstore.model.Product;

@Component
@Transactional
public class ProductDaoImpl implements ProductDao {

@Autowired
private SessionFactory sessionFactory;

public void addProduct(Product product) {
    Session session = sessionFactory.getCurrentSession();
    session.saveOrUpdate(product);
    session.flush();
}

public Product getProductById(String id) {
    Session session = sessionFactory.getCurrentSession();
    Product product = (Product) session.get(Product.class, id);
    session.flush();

    return product;
}

public List<Product> getAllProducts() {
    Session session = sessionFactory.getCurrentSession();
    Query query = session.createQuery("from Product");
    List<Product> products = query.list();
    session.flush();

    return products;
}

public void deleteProduct(String id) {
    Session session = sessionFactory.getCurrentSession();
    session.delete(getProductById(id));
    session.flush();
}

}

        <?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.xsd
            http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.1.xsd
            http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.1.xsd">

        <beans profile="dev">

            <context:annotation-config></context:annotation-config>
            <context:component-scan base-package="com.emusicstore.dao, com.emusicstore.impl"></context:component-scan> 


            <context:property-placeholder location="jdbc.properties" />

            <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
                destroy-method="close">

                <property name="driverClassName" value="${jdbc.driver}"></property>
                <property name="url" value="${jdbc.url}"></property>
                <property name="password" value="${jdbc.password}"></property>
                <property name="username" value="${jdbc.username}"></property>
            </bean>

            <!-- MY CHANGES -->
            <!-- LocalSessionFactoryBean for hibernate4 -->

            <bean id="sessionFactory"
                class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">

                <property name="dataSource" ref="dataSource"></property>
                <property name="hibernateProperties">
                    <props>
                        <!-- CHANGE HERE FOR MySQL -->
                        <prop key="hibernate.dialect">org.hibernate.dialect.MySQL5Dialect</prop>
                        <prop key="hibernate.hbm2ddl.auto">update</prop>
                        <prop key="hibernate.show_sql">true</prop>
                        <prop key="hibernate.format_sql">true</prop>
                    </props>
                </property>
                <!-- To know where is ProductDao -->
                <property name="packagesToScan">
                    <list>
                        <value>com.emusicstore.dao</value>
                        <value>com.emusicstore.impl</value>
                    </list>
                </property>
            </bean>

            <bean id="transactionManager"
                class="org.springframework.orm.hibernate4.HibernateTransactionManager">
                <property name="sessionFactory" ref="sessionFactory"></property>
            </bean>
            <tx:annotation-driven transaction-manager="transactionManager" />
        </beans>
    </beans>

    <?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:mvc="http://www.springframework.org/schema/mvc" 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/context http://www.springframework.org/schema/context/spring-context.xsd
        http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.1.xsd">


    <context:component-scan base-package="com.emusicstore." />

    <context:annotation-config></context:annotation-config>

    <mvc:annotation-driven />

    <bean id="viewResolver"
        class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/views/" />
        <property name="suffix" value=".jsp" />
    </bean>

    <mvc:resources mapping="/resources/**" location="/WEB-INF/resources/" />

    <tx:annotation-driven />
</beans>

然后前面的错误再次出现

编辑

web.xml（第一行）

pom.xml（所有我的文件）

4.0.0
com.mywebsite
乳胶店
0.0.1-快照
罐子
org.springframework
弹簧芯
4.1.4.1发布
org.springframework
春豆
4.1.4.1发布
org.springframework
春季aop
4.1.4.1发布
org.springframework
spring上下文
4.1.4.1发布
org.springframework
spring上下文支持
4.1.4.1发布
org.springframework
德克萨斯州春季
4.1.4.1发布
org.springframework
SpringJDBC
4.1.4.1发布
org.springframework
春季甲虫
4.1.4.1发布
org.springframework
弹簧oxm
4.1.4.1发布
org.springframework
弹簧网
4.1.4.1发布
org.springframework
SpringWebMVC
4.1.4.1发布
org.hibernate
休眠实体管理器
5.0.2.2最终版本
mysql
mysql连接器java
5.1.6
公共dbcp
公共dbcp
1.4
jstl
jstl
1.2
塔格利布
标准
1.1.2
org.apache.maven.plugins
maven编译器插件
3.5.1
1.8
1.8

传统上，Spring MVC应用程序中有两个上下文。根上下文（这里是您的

applicationContext.xml

），我们在其中定义所有不专用于web内容的bean，如DAO、security等。。。还有DispatcherServlet上下文（

DispatcherServlet.xml

），我们在其中定义与控制器等web操作相关的所有bean

因此，将DAO bean放入

applicationContext.xml

中，如下所示：

和事务管理器

对于第二个问题，您可以这样放置超级包：

编辑

下面是web.xml的外观：

<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>

<servlet>
  <servlet-name>dispatcher</servlet-name>
  <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
  <init-param> 
        <param-name>contextConfigLocation</param-name>
        <param-value>
            /WEB-INF/dispatcher-servlet.xml
        </param-value>
   </init-param>
   <load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
  <servlet-name>dispatcher</servlet-name>
  <url-pattern>/</url-pattern>
</servlet-mapping>

上下文配置位置
/WEB-INF/applicationContext.xml
org.springframework.web.context.ContextLoaderListener
调度员
org.springframework.web.servlet.DispatcherServlet
上下文配置位置
/WEB-INF/dispatcher-servlet.xml
1.
调度员
/

---

我知道您的配置混合了这两种上下文。

您能编辑一下以明确上面的第一个代码吗？它不可读。请修改它，我会回答你。@akuma8我刚刚修改过。我不知道它是否允许发布太多的代码。我添加了建议的代码，但仍然有相同的错误。我是否可以将sysout打印到我的控制台以查看问题出在哪里？或者这不是帮我解决问题吗？如果你能帮我，我还有一个问题。是否要发布我的pom.xml和web.xml，以确保我不会忘记此文件中的任何代码？很抱歉给您带来不便，但我认为在您的帮助下，我（我们）很快就能解决问题。除此之外，您不能。问题是Spring没有发现您的bean来将它们添加到它的bean容器中进行自动连接。你能在web.xml中添加上下文配置吗？请添加你的web.xml文件，看看你是如何配置上下文侦听器的。我的错误是，我没有看到你有几个DAO包（com.emusicstore.DAO和com.emusicstore.impl），因此，将它们添加到扫描中：

每个有Springbean的包都应该将其添加到扫描中。

<listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>
        /WEB-INF/dispatcher-servlet.xml
        /WEB-INF/applicationContext.xml
    </param-value>
</context-param>

<servlet>
    <servlet-name>dispatcher</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
    <servlet-name>dispatcher</servlet-name>
    <url-pattern>/</url-pattern>
</servlet-mapping>

org.springframework.beans.factory.BeanCreationException
org.springframework.beans.factory.NoSuchBeanCreationDefinitionException

        <?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.xsd
            http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.1.xsd
            http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.1.xsd">

        <beans profile="dev">

            <context:annotation-config></context:annotation-config>
            <context:component-scan base-package="com.emusicstore.dao, com.emusicstore.impl"></context:component-scan> 


            <context:property-placeholder location="jdbc.properties" />

            <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
                destroy-method="close">

                <property name="driverClassName" value="${jdbc.driver}"></property>
                <property name="url" value="${jdbc.url}"></property>
                <property name="password" value="${jdbc.password}"></property>
                <property name="username" value="${jdbc.username}"></property>
            </bean>

            <!-- MY CHANGES -->
            <!-- LocalSessionFactoryBean for hibernate4 -->

            <bean id="sessionFactory"
                class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">

                <property name="dataSource" ref="dataSource"></property>
                <property name="hibernateProperties">
                    <props>
                        <!-- CHANGE HERE FOR MySQL -->
                        <prop key="hibernate.dialect">org.hibernate.dialect.MySQL5Dialect</prop>
                        <prop key="hibernate.hbm2ddl.auto">update</prop>
                        <prop key="hibernate.show_sql">true</prop>
                        <prop key="hibernate.format_sql">true</prop>
                    </props>
                </property>
                <!-- To know where is ProductDao -->
                <property name="packagesToScan">
                    <list>
                        <value>com.emusicstore.dao</value>
                        <value>com.emusicstore.impl</value>
                    </list>
                </property>
            </bean>

            <bean id="transactionManager"
                class="org.springframework.orm.hibernate4.HibernateTransactionManager">
                <property name="sessionFactory" ref="sessionFactory"></property>
            </bean>
            <tx:annotation-driven transaction-manager="transactionManager" />
        </beans>
    </beans>

    <?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:mvc="http://www.springframework.org/schema/mvc" 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/context http://www.springframework.org/schema/context/spring-context.xsd
        http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.1.xsd">


    <context:component-scan base-package="com.emusicstore." />

    <context:annotation-config></context:annotation-config>

    <mvc:annotation-driven />

    <bean id="viewResolver"
        class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/views/" />
        <property name="suffix" value=".jsp" />
    </bean>

    <mvc:resources mapping="/resources/**" location="/WEB-INF/resources/" />

    <tx:annotation-driven />
</beans>

HTTP Status 500 - Servlet.init() for servlet dispatcher threw exception

type Exception report

message Servlet.init() for servlet dispatcher threw exception

description The server encountered an internal error that prevented it from fulfilling this request.

exception
javax.servlet.ServletException: Servlet.init() for servlet dispatcher threw exception
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:474)
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:624)
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:349)
org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:495)
org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:767)
org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1347)
org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
java.lang.Thread.run(Unknown Source)

    <?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns="http://xmlns.jcp.org/xml/ns/javaee"
    xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
    version="3.1">

        <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">

    <modelVersion>4.0.0</modelVersion>
    <groupId>com.mywebsite</groupId>
    <artifactId>eMusicStore</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>

    <dependencies>
            <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-core</artifactId>
            <version>4.1.4.RELEASE</version>
        </dependency>

            <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-beans</artifactId>
            <version>4.1.4.RELEASE</version>
        </dependency>

                <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aop</artifactId>
            <version>4.1.4.RELEASE</version>
        </dependency>


        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>4.1.4.RELEASE</version>
        </dependency>
                <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context-support</artifactId>
            <version>4.1.4.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-tx</artifactId>
            <version>4.1.4.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>4.1.4.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-orm</artifactId>
            <version>4.1.4.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-oxm</artifactId>
            <version>4.1.4.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-web</artifactId>
            <version>4.1.4.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>4.1.4.RELEASE</version>
        </dependency>


        <!-- To work with Hibernate -->
        <!-- All Hibernate in single dependency -->
        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-entitymanager</artifactId>
            <version>5.0.2.Final</version>
        </dependency>
        <!-- MySql -->
        <!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.6</version>
        </dependency>
        <!-- To connect with the jdbc.properties file -->
        <dependency>
            <groupId>commons-dbcp</groupId>
            <artifactId>commons-dbcp</artifactId>
            <version>1.4</version>
        </dependency>
        <dependency>
            <groupId>jstl</groupId>
            <artifactId>jstl</artifactId>
            <version>1.2</version>
        </dependency>

        <dependency>
            <groupId>taglibs</groupId>
            <artifactId>standard</artifactId>
            <version>1.1.2</version>
        </dependency>

    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.5.1</version>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                </configuration>
            </plugin>
        </plugins>
    </build>


</project>

<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>

<servlet>
  <servlet-name>dispatcher</servlet-name>
  <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
  <init-param> 
        <param-name>contextConfigLocation</param-name>
        <param-value>
            /WEB-INF/dispatcher-servlet.xml
        </param-value>
   </init-param>
   <load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
  <servlet-name>dispatcher</servlet-name>
  <url-pattern>/</url-pattern>
</servlet-mapping>