Java BeanCreationException

Question

我正在修改Heroku中的Java Spring Hibernate模板并尝试连接本地postgresql数据库。但是，我收到此错误，我不确定如何解决它。

`org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping#0': Initialization of bean failed; nested exception is org.springframework.beans.factory.CannotLoadBeanClassException: Cannot find class [com.java.model.FirstModelImple] for bean with name 'name of the object' defined in class path resource [applicationContext.xml]; nested exception is java.lang.ClassNotFoundException: com.java.model.FirstModelImple 
Related cause: org.springframework.beans.factory.CannotLoadBeanClassException: Cannot find class [com.java.model.FirstModelImple] for bean with name 'name of the object' defined in class path resource [applicationContext.xml]; nested exception is java.lang.ClassNotFoundException: com.java.model.FirstModelImple 
Related cause: org.springframework.beans.factory.CannotLoadBeanClassException: Cannot find class [com.java.model.FirstModelImple] for bean with name 'name of the object' defined in class path resource [applicationContext.xml]; nested exception is java.lang.ClassNotFoundException: com.java.model.FirstModelImple 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:527) 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456) 
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:294) 
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:225) 
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:291) 
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193) 
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:585) 
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:913) 
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:464) 
    at org.springframework.web.servlet.FrameworkServlet.configureAndRefreshWebApplicationContext(FrameworkServlet.java:631) 
    at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:588) 
    at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:645) 
    at org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:508) 
    at org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:449) 
    at org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:133) 
    at javax.servlet.GenericServlet.init(GenericServlet.java:158) 
    at org.apache.catalina.core.StandardWrapper.initServlet(StandardWrapper.java:1284) 
    at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1197) 
    at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:1087) 
    at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:5210) 
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5493) 
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) 
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1559) 
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1549) 
    at java.util.concurrent.FutureTask.run(FutureTask.java:262) 
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) 
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) 
    at java.lang.Thread.run(Thread.java:744)` 

这里是我的applicationContext.xml文件，我宣布DB：

<beans profile="default"> 
    <bean class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close" id="dataSource"> 
     <property name="driverClassName" value="org.postgresql.Driver"/> 
     <property name="url" value="jdbc:postgresql://ericsMac@localhost/mydb"/> 
     <property name="username" value="ericsMac"/> 
     <property name="password" value=" "/> 
    </bean> 

    <bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean"> 
     <property name="dataSource" ref="dataSource"/> 
     <property name="jpaVendorAdapter"> 
      <bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter"/> 
     </property> 
     <property name="jpaProperties"> 
      <props> 
       <prop key="hibernate.dialect">org.hibernate.dialect.PostgreSQLDialect</prop> 
       <prop key="hibernate.show_sql">true</prop> 
       <!-- change this to 'verify' before running as a production app --> 
       <prop key="hibernate.hbm2ddl.auto">update</prop> 
      </props> 
     </property> 
    </bean> 
</beans>` 

Answer 1

一般来说，当我看到春天的错误，我觉得这是最有用的滚动所有的方式（方法，方式，方法）到最右侧在你的代码块中的消息行结束...

在那里，我看到：

java.lang.ClassNotFoundException: com.java.model.FirstModelImple 

我猜测这个类不在你的类路径中，而是被bean配置中的某些东西引用。我也建议这行看起来很腥，可能意味着你还没有编辑一些东西，但它可能是heroku特有的（例如你正在跟随的一个教程示例？），所以我不能帮忙：

for bean with name 'name of the object' 

由于我没有在您提供的应用程序上下文中看到'对象的名称'，所以似乎很可能有其他应用程序上下文文件是正在加载的内容。