如何解析AuthenticationPrincipalArgumentResolver的ClassNotFoundException

Question

我正在练习Spring框架。以下是我的 dispatcher-servlet.xml ：

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

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

    <mvc:annotation-driven>
        <mvc:argument-resolvers>
            <bean class="org.springframework.security.web.bind.support.AuthenticationPrincipalArgumentResolver" />
        </mvc:argument-resolvers>
    </mvc:annotation-driven>

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

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

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

以下是我的 pom.xml ：

<?xml version="1.0" encoding="UTF-8"?>
<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.yusmle</groupId>
    <artifactId>emusicstore</artifactId>
    <version>1.0-SNAPSHOT</version>

    <dependencies>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>4.0.6.RELEASE</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-core</artifactId>
            <version>4.0.6.RELEASE</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-orm</artifactId>
            <version>4.0.6.RELEASE</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-tx</artifactId>
            <version>4.1.0.RELEASE</version>
        </dependency>

        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-core</artifactId>
            <version>4.0.1.Final</version>
        </dependency>

        <dependency>
            <groupId>org.hibernate.javax.persistence</groupId>
            <artifactId>hibernate-jpa-2.0-api</artifactId>
            <version>1.0.1.Final</version>
        </dependency>

        <dependency>
            <groupId>com.h2database</groupId>
            <artifactId>h2</artifactId>
            <version>1.4.190</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>

        <dependency>
            <groupId>commons-fileupload</groupId>
            <artifactId>commons-fileupload</artifactId>
            <version>1.2.2</version>
        </dependency>

        <dependency>
            <groupId>commons-io</groupId>
            <artifactId>commons-io</artifactId>
            <version>2.4</version>
        </dependency>

        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>servlet-api</artifactId>
            <version>2.5</version>
            <scope>provided</scope>
        </dependency>

        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-validator</artifactId>
            <version>4.2.0.Final</version>
        </dependency>

        <dependency>
            <groupId>javax.validation</groupId>
            <artifactId>validation-api</artifactId>
            <version>1.0.0.GA</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>4.0.6.RELEASE</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.security</groupId>
            <artifactId>spring-security-core</artifactId>
            <version>4.2.2.RELEASE</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.security</groupId>
            <artifactId>spring-security-web</artifactId>
            <version>4.2.2.RELEASE</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.security</groupId>
            <artifactId>spring-security-config</artifactId>
            <version>4.2.2.RELEASE</version>
        </dependency>

        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-core</artifactId>
            <version>2.5.1</version>
        </dependency>

        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-annotations</artifactId>
            <version>2.5.1</version>
        </dependency>

        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
            <version>2.5.1</version>
        </dependency>
    </dependencies>
</project>

我根据Udemy的视频课程这样做，但是当我尝试在Tomcat服务器上运行时出现此错误：

...
Caused by: java.lang.IllegalArgumentException: Cannot find class [org.springframework.security.web.bind.support.AuthenticationPrincipalArgumentResolver]
    at org.springframework.util.ClassUtils.resolveClassName(ClassUtils.java:283)
    at org.springframework.web.servlet.config.AnnotationDrivenBeanDefinitionParser.wrapWebArgumentResolverBeanDefs(AnnotationDrivenBeanDefinitionParser.java:522)
    at org.springframework.web.servlet.config.AnnotationDrivenBeanDefinitionParser.getArgumentResolvers(AnnotationDrivenBeanDefinitionParser.java:443)
    at org.springframework.web.servlet.config.AnnotationDrivenBeanDefinitionParser.parse(AnnotationDrivenBeanDefinitionParser.java:190)
    at org.springframework.beans.factory.xml.NamespaceHandlerSupport.parse(NamespaceHandlerSupport.java:74)
    at org.springframework.beans.factory.xml.BeanDefinitionParserDelegate.parseCustomElement(BeanDefinitionParserDelegate.java:1424)
    at org.springframework.beans.factory.xml.BeanDefinitionParserDelegate.parseCustomElement(BeanDefinitionParserDelegate.java:1414)
    at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.parseBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:187)
    at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.doRegisterBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:141)
    at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.registerBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:110)
    at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.registerBeanDefinitions(XmlBeanDefinitionReader.java:508)
    at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.doLoadBeanDefinitions(XmlBeanDefinitionReader.java:391)
    ... 56 more
Caused by: java.lang.ClassNotFoundException: org.springframework.security.web.bind.support.AuthenticationPrincipalArgumentResolver
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1284)
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1132)
    at org.springframework.util.ClassUtils.forName(ClassUtils.java:247)
    at org.springframework.util.ClassUtils.resolveClassName(ClassUtils.java:280)
    ... 67 more
...

任何人都可以帮助我吗？

Answer 1

你的spring core是 4.0.6.RELEASE ，而spring spring 4.2.2.RELEASE

这意味着spring-security看到spring core，请求spring-core.jar为class，但是这个类还没有（或者已经存在），因为版本不同。这会导致ClassNotFoundException

spring security core需要spring-core的版本至少 4.3.5.RELEASE

解决方案是统一版本并针对那些缺失的版本逐一修复它们。

找到你需要的版本，搜索（google it）maven％artifact_id％，例如'maven spring-security-core'，找到你需要的工件并向下滚动到所需的依赖项。检查您所包含的版本是否为版本要求或更高版本（通常较高版本与以前版本或多或少兼容，但较低版本与较高版本兼容。

链接到maven存储库中的spring-security-core：https://mvnrepository.com/artifact/org.springframework.security/spring-security-web/4.2.2.RELEASE

Answer 2

当您使用maven时，您不必手动将库放到WEB-INF/lib。

您实际需要做的是将项目包装类型定义为war：

<packaging>war</packaging>

当您运行mvn package时，它会收集您pom.xml的所有依赖关系，并将其放在target文件夹中的所需位置。

在您的情况下，您将在target/emusicstore-1.0-SNAPSHOT文件夹中找到可打包的可部署文件，您可以在tomcat应用程序描述符中进行符号链接或引用。