我一直在做一个webapp(一个db的CRUD接口),我使用jpetstore作为指导,但例外:
当我尝试使用mapper时遇到NullPointerException。我检查了几次,但仍然没有找到解决方案。我不知道哪个是问题。我尽我所能......但不知道。我认为它与配置有关。我已经检查了bug跟踪器中的各种错误,这些错误似乎是相关的,但没有。
我将在这里粘贴一些我认为有趣的部分:
<?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:tx="http://www.springframework.org/schema/tx"
xmlns:jdbc="http://www.springframework.org/schema/jdbc"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd
http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc-3.1.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.1.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.1.xsd">
<!-- transaction manager, use JtaTransactionManager for global tx -->
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
<property name="driverClassName" value="com.mysql.jdbc.Driver"/>
<property name="url" value="jdbc:mysql://192.168.56.2/txomon_lmb97"/>
<property name="username" value="username"/>
<property name="password" value="password"/>
</bean>
<!-- In theory, this has to be for making a transaction manager (don't know what it is for) -->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource" />
</bean>
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="typeAliasesPackage" value="org.lmb97.data" />
</bean>
<!-- enable component scanning (beware that this does not enable mapper scanning!) -->
<context:component-scan base-package="org.lmb97" />
<!-- enable autowire -->
<context:annotation-config />
<!-- enable transaction demarcation with annotations -->
<tx:annotation-driven />
<!-- scan for mappers and let them be autowired -->
<bean id="mybatisMapperScanner" class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="org.lmb97.data.*Mapper" />
</bean>
</beans>
<web-app 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"
version="2.4">
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/applicationContext.xml</param-value>
</context-param>
<context-param>
<param-name>javax.servlet.jsp.jstl.fmt.localizationContext</param-name>
<param-value>StripesResources</param-value>
</context-param>
<!-- Aqui empiezo a definir Stripes -->
<filter>
<display-name>Stripes Filter</display-name>
<filter-name>StripesFilter</filter-name>
<filter-class>net.sourceforge.stripes.controller.StripesFilter</filter-class>
<init-param>
<param-name>ActionResolver.Packages</param-name>
<param-value>org.lmb97.web.action</param-value>
</init-param>
<init-param>
<param-name>Interceptor.Classes</param-name>
<param-value>net.sourceforge.stripes.integration.spring.SpringInterceptor</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>StripesFilter</filter-name>
<servlet-name>StripesDispatcher</servlet-name>
<dispatcher>REQUEST</dispatcher>
</filter-mapping>
<servlet>
<servlet-name>StripesDispatcher</servlet-name>
<servlet-class>net.sourceforge.stripes.controller.DispatcherServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>StripesDispatcher</servlet-name>
<url-pattern>*.action</url-pattern>
</servlet-mapping>
<!--Aqui empiezo a definir Spring -->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
</web-app>
正如我所说,我不想拥有一个Services层,我直接在ActionBean上完成所有操作,在EventsActionBean https://github.com/txomon/Universidad/blob/eb7753e32a2eccbf4e5e81e815d68b929bcb2e61/3/LabTD/practica2/src/java/org/lmb97/web/action/EventsActionBean.java#L74
的第76行抛出异常。我第一次打电话给映射器。
我有apache tomcat的日志和普通日志,其中log4j在所有here中配置,它在.7z中,因为它们是很棒的日志。回购邮件是here,我正在提交确切的提交,这样如果我使用回购,你可以看到实际的状态。
配置netbeans项目,以便在克隆repo时,包含所有库,没有外部依赖项。
欢迎任何帮助/想法,你可以让我测试,
欢呼并提前感谢你!
答案 0 :(得分:2)
当我们谈论使用的罐子时,我们需要将特定注释与其相关域进行协调:
答案 1 :(得分:0)
扫描仪不支持通配符,因此请更改:
<property name="basePackage" value="org.lmb97.data.*Mapper" />
对此:
<property name="basePackage" value="org.lmb97.data" />