java.lang.ClassNotFoundException:org.apache.commons.dbcp.BasicDataSource
我正在用maven在spring MVC上做一个项目。我在运行项目时遇到一个错误java.lang.ClassNotFoundException:org.apache.commons.dbcp.BasicDataSource。我在代码下面包含了我认为的所有依赖项。正在等待您的答复 WEB.xmljava.lang.ClassNotFoundException:org.apache.commons.dbcp.BasicDataSource,java,spring,maven,spring-mvc,Java,Spring,Maven,Spring Mvc,我正在用maven在spring MVC上做一个项目。我在运行项目时遇到一个错误java.lang.ClassNotFoundException:org.apache.commons.dbcp.BasicDataSource。我在代码下面包含了我认为的所有依赖项。正在等待您的答复 WEB.xml <?xml version="1.0" encoding="UTF-8"?> <web-app xmlns:xsi="http://www.w3.org/2001/XMLSch
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" version="3.0">
<servlet>
<servlet-name>AccPerSpring</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/servlet-context.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>AccPerSpring</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>
阿克珀斯普林
org.springframework.web.servlet.DispatcherServlet
上下文配置位置
/WEB-INF/servlet-context.xml
1.
阿克珀斯普林
/
servlet-context.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:mvc="http://www.springframework.org/schema/mvc" xmlns:beans="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.2.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.2.xsd">
<!-- Enable @Controller annotation support -->
<mvc:annotation-driven />
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/" />
<property name="suffix" value=".jsp" />
</bean>
<context:component-scan base-package="com.gerrytan.pizzashop"/>
<bean id="myDataSource" class=" org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
<property name="driverClassName" value="com.mysql.jdbc.Driver"/>
<property name="url" value="jdbc:mysql://localhost:3306/mydatabase"/>
<property name="username" value="root"/>
<property name="password" value="kca@fnpl#12"/>
</bean>
<!-- Hibernate Session Factory -->
<bean id="mySessionFactory"class="org.springframework.orm.hibernate4.LocalSessionFactoryBean>
<property name="dataSource" ref="myDataSource"/>
<property name="packagesToScan">
<array>
<value>com.gerrytan.pizzashop</value>
</array>
</property>
<property name="hibernateProperties">
<value>
hibernate.dialect=org.hibernate.dialect.MySQLDialect
</value>
</property>
</bean>
<!-- Hibernate Transaction Manager -->
<bean id="transactionManager" class="org.springframework.orm.hibernate4.HibernateTransactionManager">
<property name="sessionFactory" ref="mySessionFactory"/>
</bean>
<mvc:resources mapping="/resources/**" location="/WEB-INF/resources/" />
<!-- Activates annotation based transaction management -->
<tx:annotation-driven transaction-manager="transactionManager"/>
</beans>
构建完成后,签入war文件->WEB-INF/lib for commons-dbcp-1.4.jar。如果它在类路径中可用,那么您的问题将得到解决。
还有一件事,打开commons-dbcp-1.4.jar并检查特定类(org.apache.commons.dbcp.BasicDataSource)是否可用?如果没有,您必须尝试commons-dbcp-1.4.jar的其他版本。有时,当您有相同类的冲突版本时,您会遇到这些奇怪的异常。这可能是因为同一JAR的不同版本已经在应用程序服务器的类路径上,或者如果它是通过不同的依赖项包含的
mvn dependency:tree
是一个可以运行的命令,用于查看进入应用程序的所有依赖项,包括从其他jar引入的依赖项。运行它来检查是否有其他可能导致冲突的“dbcp”JAR可能是值得的
还值得检查正在部署的应用程序服务器中的“lib”文件夹,以查看其中是否已经存在任何“dbcp”JAR。如果是这种情况,那么将“commons dbcp”工件的作用域更改为“provided”应该可以解决问题。导入类可能是一个常见错误
org.apache.tomcat.dbcp.dbcp.BasicDataSource
而不是
org.apache.commons.dbcp.BasicDataSource
在java代码中。即使在错误消息中,它也很容易被忽略。这个jar在您的类路径commons-dbcp.jar中吗??当然可以,但是不工作commons-dbcp-1.4.jar commons-dbcp-1.4-javadoc.jar commons-dbcp-1.4-sources.jar有这3个jar我刚刚注意到在“myDataSource”bean声明的“class”属性中有一个前导空格。如果这是一个问题,我会感到惊讶,但可能值得消除它以防万一!向我们展示您的依赖关系树(mvn dependency:tree
)。1.4 jar包含BasicDataSource类。然后如何
<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>AccPerSpring</groupId>
<artifactId>AccPerSpring</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>
<properties>
<spring.version>3.2.3.RELEASE</spring.version>
<hibernate.version>4.2.2.Final</hibernate.version>
</properties>
<dependencies>
<!-- Spring -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-orm</artifactId>
<version>${spring.version}</version>
</dependency>
<!-- Hibernate -->
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>${hibernate.version}</version>
</dependency>
<!-- Java EE -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>2.5</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>jstl</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<!-- Others -->
<dependency>
<groupId>commons-dbcp</groupId>
<artifactId>commons-dbcp</artifactId>
<version>1.4</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.25</version>
</dependency>
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.14</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.1</version>
<configuration>
<source>1.7</source>
<target>1.7</target>
</configuration>
</plugin>
</plugins>
</build>
</project>