java 找不到类 org.springframework.web.context.ContextLoaderListener
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class org.springframework.web.context.ContextLoaderListener not found
提问by Arun
When I am creating a new Spring MVC project using eclipse and maven, it throws the following error when I do a run as maven build(goal is tomcat:run). I did the build after clean and install.
当我使用 eclipse 和 maven 创建一个新的 Spring MVC 项目时，当我作为 maven build 运行时它会抛出以下错误（目标是 tomcat:run）。我在清理和安装后进行了构建。
SEVERE: Error configuring application listener of class org.springframework.web.context.ContextLoaderListener
严重：配置 org.springframework.web.context.ContextLoaderListener 类的应用程序侦听器时出错
java.lang.ClassNotFoundException: org.springframework.web.context.ContextLoaderListener
java.lang.ClassNotFoundException: org.springframework.web.context.ContextLoaderListener
- The other solutions for this problem are to add the maven dependencies in deployment assembly from the project properties.
- But, the deployment assembly option is not present when I right click the properties.
- I also tried adding spring.jar manually.
- The class org.springframework.web.context.ContextLoaderListener is present in the maven dependency and still the error is thrown.
- 此问题的其他解决方案是从项目属性中在部署程序集中添加 maven 依赖项。
- 但是，当我右键单击属性时，部署程序集选项不存在。
- 我也尝试手动添加 spring.jar。
- 类 org.springframework.web.context.ContextLoaderListener 存在于 maven 依赖项中，但仍然抛出错误。
pom.xml
pom.xml
My pom.xml is as follows:
我的 pom.xml 如下：
<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.org</groupId>
<artifactId>Remindem</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>
<name>Remindem</name>
<url>http://maven.apache.org</url>
<dependencies>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.0.1</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>jsp-api</artifactId>
<version>2.1</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.apache.maven</groupId>
<artifactId>maven-plugin-api</artifactId>
<version>2.0</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>3.6.8.Final</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-validator</artifactId>
<version>4.0.0.Beta2</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.6</version>
</dependency>
<dependency>
<groupId>javassist</groupId>
<artifactId>javassist</artifactId>
<version>3.12.1.GA</version>
</dependency>
<dependency>
<groupId>javax.mail</groupId>
<artifactId>mail</artifactId>
<version>1.4</version>
</dependency>
<!-- Spring framework -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring</artifactId>
<version>2.5.6</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>3.0.5.RELEASE</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>3.2.3.RELEASE</version>
<scope>provided</scope>
</dependency>
<!-- Spring MVC framework -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>2.5.6</version>
<scope>provided</scope>
</dependency>
<!-- JSTL -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<version>1.1.2</version>
</dependency>
<dependency>
<groupId>taglibs</groupId>
<artifactId>standard</artifactId>
<version>1.1.2</version>
</dependency>
<!-- for compile only, your container should have this -->
<!-- <dependency> <groupId>javax.servlet</groupId> <artifactId>servlet-api</artifactId>
<version>2.5</version> <scope>provided</scope> </dependency> -->
<dependency>
<groupId>org.apache.tomcat</groupId>
<artifactId>tomcat-api</artifactId>
<version>7.0.19</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.tomcat.maven</groupId>
<artifactId>tomcat7-maven-plugin</artifactId>
<version>2.0</version>
<configuration>
<url>http://localhost:8080/Remindem</url>
</configuration>
</plugin>
</plugins>
</build>
</project>
web.xml
网页.xml
My web.xml is as follow:
我的 web.xml 如下：
<?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">
<display-name>Remindem</display-name>
<session-config>
<session-timeout>
30
</session-timeout>
</session-config>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
<servlet>
<servlet-name>svn</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>
/WEB-INF/SpringAppServlet.xml
</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>
/WEB-INF/SpringAppServlet.xml
</param-value>
</context-param>
<servlet-mapping>
<servlet-name>svn</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
</web-app>
回答by gerrytan
This is because you mark your Spring dependencies with <scope>provided</scope>on your maven pom.xml and you did not include the actual jars on the classpath when running the program. There are two possible solutions:
这是因为您<scope>provided</scope>在 maven pom.xml 上标记了 Spring 依赖项，并且在运行程序时没有在类路径中包含实际的 jar。有两种可能的解决方案：
- Change the dependency scope into compile
- Include the spring jars with matching version to your classpath when running the application
- 将依赖范围改为compile
- 运行应用程序时，将具有匹配版本的 spring jar 包含到您的类路径中
