HTTP 状态 500 - servlet appServlet 的 Servlet.init() 在 Spring MVC 中抛出异常

Question

stackoverflow 中有很多这样的错误，但我无法解决我的问题。以下是我的简单配置：

context.xml 来自我的 TOMCAT 服务器，我在其中配置了用于访问我的 oracle 11g 服务器的数据源

<?xml version="1.0" encoding="UTF-8"?>
<Context>

    <WatchedResource>WEB-INF/web.xml</WatchedResource>
    <WatchedResource>${catalina.base}/conf/web.xml</WatchedResource>

    <!--Oracle DataSource-->
        <Resource
             name="jdbc/MonDataSource"
             auth="Container"
             type="javax.sql.DataSource"
             driverClassName="oracle.jdbc.OracleDriver"
             url="jdbc:oracle:thin:@localhost:1521:orcl"
             username="system"
             password="Azerty123"
             connectionProperties="SetBigStringTryClob=true"
             accessToUnderlyingConnectionAllowed="true"
             maxTotal="60"
             maxIdle="20"
             maxWaitMillis="10000"
         />

</Context>

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">

    <!-- The definition of the Root Spring Container shared by all Servlets and Filters -->
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>/WEB-INF/spring/root-context.xml</param-value>
    </context-param>

    <!-- Creates the Spring Container shared by all Servlets and Filters -->
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>

    <!-- Processes application requests -->
    <servlet>
        <servlet-name>appServlet</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>/WEB-INF/spring/appServlet/servlet-context.xml</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>

    <servlet-mapping>
        <servlet-name>appServlet</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>

</web-app>

servlet-context.xml 显示我的 bean 配置

    <beans:bean id="dataSource" class="org.springframework.jndi.JndiObjectFactoryBean">
        <beans:property name="jndiName" value="java:comp/env/jdbc/MonDataSource"/>
    </beans:bean>

    <beans:bean id="ArticleDAO" class="com.projet.testjdbc.ArticleDAOImpl">
        <beans:constructor-arg>
            <beans:ref bean="dataSource" />
        </beans:constructor-arg>
    </beans:bean>

</beans:beans>

我不知道它是否有用，但您在我的 controller 操作下进行了操作

@Controller
public class HomeController {

    @Autowired
    private ArticleDAO aricleDAO;

    @RequestMapping(value="/liste")
    public ModelAndView home() throws IOException{
        List<Article> listArticles = aricleDAO.list();
        ModelAndView model = new ModelAndView("home");
        model.addObject("articleListe", listArticles);
        return model;
    }

}

异常消息摘录

异常 javax.servlet.ServletException: Servlet appServlet 的 Servlet.init() 抛出异常 org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502) org.apache.catalina.valves.ErrorReportValve.invoke（ErrorReportValve.java:79 ...

根本原因 org.springframework.beans.factory.UnsatisfiedDependencyException：创建名为“homeController”的bean时出错：通过字段“aricleDAO”表示不满足的依赖关系；嵌套异常是 org.springframework.beans.factory.BeanCreationException：创建名为“ArticleDAO”的 bean 时出错：无法自省 bean 类 [com.projet.testjdbc.ArticleDAOImpl] 的查找方法元数据：找不到它所依赖的类；嵌套异常是 java.lang.NoClassDefFoundError: org/springframework/jdbc/core/RowMapper org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:588) org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:88) org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:366) org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1264) org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:553) org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:483) ...

根本原因 org.springframework.beans.factory.BeanCreationException：创建名为“ArticleDAO”的bean时出错：无法自省查找方法元数据的bean类[com.projet.testjdbc.ArticleDAOImpl]：找不到它所依赖的类；嵌套异常是 java.lang.NoClassDefFoundError: org/springframework/jdbc/core/RowMapper org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.determineCandidateConstructors(AutowiredAnnotationBeanPostProcessor.java:269) org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.determineConstructorsFromBeanPostProcessors(AbstractAutowireCapableBeanFactory.java:1118) org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1091) org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:513) org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:483) org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306) ...

根本原因 java.lang.NoClassDefFoundError: org/springframework/jdbc/core/RowMapper java.lang.Class.getDeclaredMethods0（本机方法） java.lang.Class.privateGetDeclaredMethods（未知来源） java.lang.Class.getDeclaredMethods（未知来源） org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:613) org.springframework.util.ReflectionUtils.doWithMethods(ReflectionUtils.java:524) org.springframework.util.ReflectionUtils.doWithMethods(ReflectionUtils.java:510) org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.determineCandidateConstructors(AutowiredAnnotationBeanPostProcessor.java:247) ...

根本原因 java.lang.ClassNotFoundException: org.springframework.jdbc.core.RowMapper

org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1333) org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1167) java.lang.Class.getDeclaredMethods0（本机方法） java.lang.Class.privateGetDeclaredMethods（未知来源） java.lang.Class.getDeclaredMethods（未知来源） org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:613) org.springframework.util.ReflectionUtils.doWithMethods(ReflectionUtils.java:524) ...

Answer 1

root cause java.lang.ClassNotFoundException: org.springframework.jdbc.core.RowMapper

看起来你错过了一个依赖。将此添加到 maven（如果您使用它）

<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-jdbc</artifactId>
    <version>2.0.6</version>
</dependency>

如果不添加 .jar 到类路径