Question

当我尝试在Tomcat服务器上运行项目时，出现以下错误：

java.lang.ClassNotFoundException: org.hibernate.dialect.PostgreSQLDialect

完整错误堆栈：

SEVERE: Context initialization failed
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'contactController': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private family.service.ContactService family.controller.ContactController.contactService; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'contactServiceImpl': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private family.dao.ContactDAO family.service.ContactServiceImpl.contactDAO; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'contactDAOImpl': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private org.hibernate.SessionFactory family.dao.ContactDAOImpl.sessionFactory; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sessionFactory' defined in ServletContext resource [/WEB-INF/spring-servlet.xml]: Invocation of init method failed; nested exception is org.hibernate.HibernateException: Dialect class not found: org.hibernate.dialect.PostgreSQLDialect 
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:292)
...
Caused by: org.springframework.beans.factory.BeanCreationException: Could not autowire field: private family.service.ContactService family.controller.ContactController.contactService; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'contactServiceImpl': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private family.dao.ContactDAO family.service.ContactServiceImpl.contactDAO; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'contactDAOImpl': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private org.hibernate.SessionFactory family.dao.ContactDAOImpl.sessionFactory; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sessionFactory' defined in ServletContext resource [/WEB-INF/spring-servlet.xml]: Invocation of init method failed; nested exception is org.hibernate.HibernateException: Dialect class not found: org.hibernate.dialect.PostgreSQLDialect 
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:508)
    at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:87)
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:289)
    ... 29 more
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'contactServiceImpl': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private family.dao.ContactDAO family.service.ContactServiceImpl.contactDAO; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'contactDAOImpl': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private org.hibernate.SessionFactory family.dao.ContactDAOImpl.sessionFactory; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sessionFactory' defined in ServletContext resource [/WEB-INF/spring-servlet.xml]: Invocation of init method failed; nested exception is org.hibernate.HibernateException: Dialect class not found: org.hibernate.dialect.PostgreSQLDialect 
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:292)
...
Caused by: org.springframework.beans.factory.BeanCreationException: Could not autowire field: private family.dao.ContactDAO family.service.ContactServiceImpl.contactDAO; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'contactDAOImpl': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private org.hibernate.SessionFactory family.dao.ContactDAOImpl.sessionFactory; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sessionFactory' defined in ServletContext resource [/WEB-INF/spring-servlet.xml]: Invocation of init method failed; nested exception is org.hibernate.HibernateException: Dialect class not found: org.hibernate.dialect.PostgreSQLDialect 
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:508)
    at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:87)
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:289)
    ... 42 more
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'contactDAOImpl': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private org.hibernate.SessionFactory family.dao.ContactDAOImpl.sessionFactory; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sessionFactory' defined in ServletContext resource [/WEB-INF/spring-servlet.xml]: Invocation of init method failed; nested exception is org.hibernate.HibernateException: Dialect class not found: org.hibernate.dialect.PostgreSQLDialect 
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:292)
Caused by: org.springframework.beans.factory.BeanCreationException: Could not autowire field: private org.hibernate.SessionFactory family.dao.ContactDAOImpl.sessionFactory; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sessionFactory' defined in ServletContext resource [/WEB-INF/spring-servlet.xml]: Invocation of init method failed; nested exception is org.hibernate.HibernateException: Dialect class not found: org.hibernate.dialect.PostgreSQLDialect 
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:508)
    at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:87)
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:289)
    ... 55 more
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sessionFactory' defined in ServletContext resource [/WEB-INF/spring-servlet.xml]: Invocation of init method failed; nested exception is org.hibernate.HibernateException: Dialect class not found: org.hibernate.dialect.PostgreSQLDialect 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1548)
...
Caused by: org.hibernate.HibernateException: Dialect class not found: org.hibernate.dialect.PostgreSQLDialect 
    at org.hibernate.dialect.resolver.DialectFactory.constructDialect(DialectFactory.java:159)
    at org.hibernate.dialect.resolver.DialectFactory.buildDialect(DialectFactory.java:99)
...
Caused by: java.lang.ClassNotFoundException: org.hibernate.dialect.PostgreSQLDialect 
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1702)
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1547)
...

当我尝试按照本教程学习时，我遇到了这个问题： Tutorial:Create Spring 3 MVC Hibernate 3 Example using Maven in Eclipse

我正在使用Hibernate 3.6.9-Final，Spring 4.（我可以切换到Spring 3，如果它很重要。我只是从另一个项目中获取了Spring依赖项。）

我尝试过：

从Google搜索我是否缺少Maven依赖项。类org.hibernate.dialect似乎是由Hibernate提供的，我在我的pom.xml中有hibernate-core。我试图将hibernate-entitymanager，hibernate-tools等添加到pom.xml中，希望其中一个提供必要的依赖，但它没有帮助。
我想也许我需要添加PostgreSQL驱动程序，所以我将9.1-901-1.jdbc4添加到pom.xml（见下文）。它没有效果。
我试着看看Eclipse是否可以解析类org.hibernate.dialect.PostgreSQLDialect，事实上，它可以。（我随机项目文件并创建了PostgreSQLDialect的实体字段，CTRL +点击了字段，我被带到了org.hibernate.dialect.PostgreSQLDialect类的源代码中。但是当我尝试在服务器上运行项目时，我仍然会遇到错误。
我按照指示here尝试检查Maven依赖树。我没有看到它更聪明，但它是在这篇文章的末尾提供的，也许它可以帮助别人回答。

弹簧servlet.xml中

按照教程中的说明，我创建了spring-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:aop="http://www.springframework.org/schema/aop"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:jee="http://www.springframework.org/schema/jee"
    xmlns:lang="http://www.springframework.org/schema/lang"
    xmlns:p="http://www.springframework.org/schema/p"
    xmlns:tx="http://www.springframework.org/schema/tx"
    xmlns:util="http://www.springframework.org/schema/util"
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
        http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee.xsd
        http://www.springframework.org/schema/lang http://www.springframework.org/schema/lang/spring-lang.xsd
        http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd
        http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util.xsd">

    <context:annotation-config />
    <context:component-scan base-package="family" />

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

    <bean id="messageSource"
        class="org.springframework.context.support.ReloadableResourceBundleMessageSource">
        <property name="basename" value="classpath:messages" />
        <property name="defaultEncoding" value="UTF-8" />
    </bean>
    <bean id="propertyConfigurer"
        class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"
        p:location="/WEB-INF/jdbc.properties" />

    <bean id="dataSource"
        class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close"
        p:driverClassName="${jdbc.driverClassName}"
        p:url="${jdbc.databaseurl}" p:username="${jdbc.username}"
        p:password="${jdbc.password}" />

     <bean id="sessionFactory"
        class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
        <property name="dataSource" ref="dataSource" />
        <property name="configLocation">
            <value>classpath:hibernate.cfg.xml</value>
        </property>
        <property name="configurationClass">
            <value>org.hibernate.cfg.AnnotationConfiguration</value>
        </property>
        <property name="hibernateProperties">
            <props>
                <prop key="hibernate.dialect">${jdbc.dialect}</prop>
                <prop key="hibernate.show_sql">true</prop>
            </props>
        </property>
    </bean>

    <tx:annotation-driven />
    <bean id="transactionManager"
        class="org.springframework.orm.hibernate3.HibernateTransactionManager">
        <property name="sessionFactory" ref="sessionFactory" />
    </bean>
</beans>

jdbc.properties

另外，我创建了jdbc.properties，其中包含该行（未提供的其他行，因为它们包含密码）：

jdbc.dialect=org.hibernate.dialect.PostgreSQLDialect

的pom.xml

我有以下POM文件（因为教程没有提供POM文件，我尽可能地从不同来源合并了POM文件）：

<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/maven-v4_0_0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>test</groupId>
    <artifactId>test</artifactId>
    <packaging>war</packaging>
    <version>0.0.1-SNAPSHOT</version>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>0.5.0.M6</version>
    </parent>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
    </properties>

    <dependencies>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>servlet-api</artifactId>
            <version>2.5</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>javax.persistence</groupId>
            <artifactId>persistence-api</artifactId>
            <version>1.0</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-orm</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-tx</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-core</artifactId>
            <version>3.6.9.Final</version>
        </dependency>
        <dependency>
            <groupId>postgresql</groupId>
            <artifactId>postgresql</artifactId>
            <version>9.1-901-1.jdbc4</version>
        </dependency>
        <dependency>
            <groupId>commons-logging</groupId>
            <artifactId>commons-logging</artifactId>
            <version>1.1.1</version>
        </dependency>
        <dependency>
            <groupId>commons-dbcp</groupId>
            <artifactId>commons-dbcp</artifactId>
        </dependency>
        <dependency>
            <groupId>jstl</groupId>
            <artifactId>jstl</artifactId>
            <version>1.2</version>
            <scope>compile</scope>
        </dependency>

    </dependencies>
    <build>
        <plugins>
            <plugin>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <source>1.5</source>
                    <target>1.5</target>
                </configuration>
            </plugin>
            <!-- <plugin> <artifactId>maven-war-plugin</artifactId> <version>2.0</version> 
                </plugin> -->
        </plugins>
    </build>

    <repositories>
        <repository>
            <id>spring-snapshots</id>
            <url>http://repo.spring.io/libs-snapshot</url>
            <snapshots>
                <enabled>true</enabled>
            </snapshots>
        </repository>
    </repositories>
    <pluginRepositories>
        <pluginRepository>
            <id>spring-snapshots</id>
            <url>http://repo.spring.io/libs-snapshot</url>
            <snapshots>
                <enabled>true</enabled>
            </snapshots>
        </pluginRepository>
    </pluginRepositories>
</project>

maven依赖树

mvn dependency:tree -Dverbose

[INFO] test:test:war:0.0.1-SNAPSHOT
[INFO] +- javax.servlet:servlet-api:jar:2.5:provided
[INFO] +- junit:junit:jar:4.11:test
[INFO] |  \- org.hamcrest:hamcrest-core:jar:1.3:test
[INFO] +- javax.persistence:persistence-api:jar:1.0:compile
[INFO] +- org.springframework:spring-context:jar:4.0.0.RC1:compile
[INFO] |  +- org.springframework:spring-aop:jar:4.0.0.RC1:compile
[INFO] |  |  +- (aopalliance:aopalliance:jar:1.0:compile - omitted for duplicate
)
[INFO] |  |  +- (org.springframework:spring-beans:jar:4.0.0.RC1:compile - omitte
d for duplicate)
[INFO] |  |  \- (org.springframework:spring-core:jar:4.0.0.RC1:compile - omitted
 for duplicate)
[INFO] |  +- org.springframework:spring-beans:jar:4.0.0.RC1:compile
[INFO] |  |  \- (org.springframework:spring-core:jar:4.0.0.RC1:compile - omitted
 for duplicate)
[INFO] |  +- org.springframework:spring-core:jar:4.0.0.RC1:compile
[INFO] |  \- org.springframework:spring-expression:jar:4.0.0.RC1:compile
[INFO] |     \- (org.springframework:spring-core:jar:4.0.0.RC1:compile - omitted
 for duplicate)
[INFO] +- org.springframework:spring-orm:jar:4.0.0.RC1:compile
[INFO] |  +- aopalliance:aopalliance:jar:1.0:compile
[INFO] |  +- (org.springframework:spring-beans:jar:4.0.0.RC1:compile - omitted f
or duplicate)
[INFO] |  +- (org.springframework:spring-core:jar:4.0.0.RC1:compile - omitted fo
r duplicate)
[INFO] |  +- org.springframework:spring-jdbc:jar:4.0.0.RC1:compile
[INFO] |  |  +- (org.springframework:spring-beans:jar:4.0.0.RC1:compile - omitte
d for duplicate)
[INFO] |  |  +- (org.springframework:spring-core:jar:4.0.0.RC1:compile - omitted
 for duplicate)
[INFO] |  |  \- (org.springframework:spring-tx:jar:4.0.0.RC1:compile - omitted f
or duplicate)
[INFO] |  \- (org.springframework:spring-tx:jar:4.0.0.RC1:compile - omitted for
duplicate)
[INFO] +- org.springframework:spring-webmvc:jar:4.0.0.RC1:compile
[INFO] |  +- (org.springframework:spring-beans:jar:4.0.0.RC1:compile - omitted f
or duplicate)
[INFO] |  +- (org.springframework:spring-context:jar:4.0.0.RC1:compile - omitted
 for duplicate)
[INFO] |  +- (org.springframework:spring-core:jar:4.0.0.RC1:compile - omitted fo
r duplicate)
[INFO] |  +- (org.springframework:spring-expression:jar:4.0.0.RC1:compile - omit
ted for duplicate)
[INFO] |  \- (org.springframework:spring-web:jar:4.0.0.RC1:compile - omitted for
 duplicate)
[INFO] +- org.springframework:spring-tx:jar:4.0.0.RC1:compile
[INFO] |  +- (aopalliance:aopalliance:jar:1.0:compile - omitted for duplicate)
[INFO] |  +- (org.springframework:spring-beans:jar:4.0.0.RC1:compile - omitted f
or duplicate)
[INFO] |  \- (org.springframework:spring-core:jar:4.0.0.RC1:compile - omitted fo
r duplicate)
[INFO] +- org.springframework:spring-web:jar:4.0.0.RC1:compile
[INFO] |  +- (aopalliance:aopalliance:jar:1.0:compile - omitted for duplicate)
[INFO] |  +- (org.springframework:spring-aop:jar:4.0.0.RC1:compile - omitted for
 duplicate)
[INFO] |  +- (org.springframework:spring-beans:jar:4.0.0.RC1:compile - omitted f
or duplicate)
[INFO] |  +- (org.springframework:spring-context:jar:4.0.0.RC1:compile - omitted
 for duplicate)
[INFO] |  \- (org.springframework:spring-core:jar:4.0.0.RC1:compile - omitted fo
r duplicate)
[INFO] +- org.hibernate:hibernate-core:jar:3.6.9.Final:compile
[INFO] |  +- antlr:antlr:jar:2.7.6:compile
[INFO] |  +- commons-collections:commons-collections:jar:3.1:compile
[INFO] |  +- dom4j:dom4j:jar:1.6.1:compile
[INFO] |  +- org.hibernate:hibernate-commons-annotations:jar:3.2.0.Final:compile

[INFO] |  |  \- (org.slf4j:slf4j-api:jar:1.7.5:compile - version managed from 1.
6.1; omitted for duplicate)
[INFO] |  +- org.hibernate.javax.persistence:hibernate-jpa-2.0-api:jar:1.0.1.Fin
al:compile
[INFO] |  +- javax.transaction:jta:jar:1.1:compile
[INFO] |  \- org.slf4j:slf4j-api:jar:1.7.5:compile
[INFO] +- postgresql:postgresql:jar:9.1-901-1.jdbc4:compile
[INFO] +- commons-logging:commons-logging:jar:1.1.1:compile
[INFO] +- commons-dbcp:commons-dbcp:jar:1.4:compile
[INFO] |  \- commons-pool:commons-pool:jar:1.5.4:compile
[INFO] +- jstl:jstl:jar:1.2:compile
[INFO] +- org.mockito:mockito-core:jar:1.9.5:test
[INFO] |  +- (org.hamcrest:hamcrest-core:jar:1.1:test - omitted for conflict wit
h 1.3)
[INFO] |  \- org.objenesis:objenesis:jar:1.0:test
[INFO] \- org.hamcrest:hamcrest-library:jar:1.3:test
[INFO]    \- (org.hamcrest:hamcrest-core:jar:1.3:test - omitted for duplicate)

更新

Al Sweetman提出问题在于JAR-s没有获得WAR的包装。我们和一位同事核实过：

我在项目上运行“mvn package”（来自命令行）
我将创建的WAR（test-1.0.0-BUILD-SNAPSHOT.war）放入Tomcat（C：\ apache-tomcat-7.0.50 \ webapps）
我从命令行运行startup.bat

在Tomcat日志中，我看到同样的错误：找不到PostgreSQLDialect。

Tomcat已解压缩WAR文件。如果我查看目录： C：\ Apache的Tomcat的7.0.50 \ web应用\测试-1.0.0-BUILD-SNAPSHOT \ WEB-INF \ lib中

我看到文件postgresql-9.1-901-1.jdbc4.jar很好地捆绑了。我不知道为什么项目在读取spring-servlet.xml时没有找到JAR文件...

UPDATE2： 所有必要的JAR似乎都存在：

enter image description here

UPDATE3： 我将PostgreSQL数据库更改为H2数据库，现在它开始工作而没有错误。

我还从运行配置中移除了JAR - ＆gt; Classpath，因为现在它们似乎没有效果。

但是，如果我从部署程序集中删除Maven依赖项，那么我会收到错误： java.lang.ClassNotFoundException：org.springframework.web.context.ContextLoaderListener。所以这也是解决方案的一部分。无论如何，现在一切正常（除非我想再次使用PostgreSQL :)）

Answer 1

enter image description here 假设您正在从Eclipse / STS中运行服务器：值得检查服务器启动配置以确保将postgres jar作为依赖项附加。我经常发现“编辑器”类路径和“服务器运行时”类路径之间存在差异。

点击“运行”
点击“运行配置”
单击“Apache Tomcat”并选择您的配置/服务器
单击“类路径”选项卡。然后，您可以在选择“用户条目”后通过“添加JAR”按钮手动添加postgres jar

另一个想法

还有另一种配置可以使用 - 我想我可能得到了错误的Eclipse窗口（通常是IntelliJ用户）。

尝试以下

右键单击Eclipse项目
选择“属性”
选择“部署程序集”
检查JAR列表中的hibernate和postgres。
如果没有，请点击“添加”
选择“通过路径变量归档”
选择“M2_REPO”，然后从下拉列表中找到你的仓库中的jar用于postgres和hibernate。

然后点击完成。

我认为发生的事情是战争创建时没有将jar文件捆绑到战争中。

Answer 2

Al Sweetman的建议有所帮助，但我收到了新的错误和错误（ClassNotFoundExceptions）。

因此，除了Al Sweetman的建议外，我还在Maven Dependencies中添加了Java Build Path。 ~~之后我没有收到任何错误！~~其实我错了。我看着服务器开始工作，但它仍然犯了同样的错误。将Maven依赖项添加到Java Build Path没有任何影响。

<强>更新我将PostgreSQL数据库更改为H2数据库，现在一切正常。但是我仍然需要将Maven Dependencies添加到Deployment Assembly中，所以这是解决方案的一部分。

Screenshot

尝试在Tomcat服务器上部署Spring应用程序时ClassNotFoundException（未找到类PostgreSQLDialect）

弹簧servlet.xml中

jdbc.properties

的pom.xml

maven依赖树

2 个答案: