Spring 注解注入 SessionFactory 空指针异常

Question

Spring 注解注入 SessionFactory 空指针异常

条件一
applicationContext.xml文件已经配置了SessionFactory

 <bean id="sessionFactory"  class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
        <!-- 引用上面的dataSource配置数据库 -->
        <property name="dataSource">
            <ref bean="dataSource" />
        </property>
        <!-- Hibernate的一些属性配置 -->
        <property name="hibernateProperties">
            <props>
                <prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop><!-- Hibernate的配置方言 -->
                <prop key="hibernate.show_sql">true</prop><!-- Hibernate生成的sql语句是否显示 -->
            </props>
        </property>

        <property name="mappingResources">
            <list>
                <value>com/bigfire/entity/Sale.hbm.xml</value>
            </list>
        </property>

条件二 SessionFactory 已经成功注入到Spring容器中，

ApplicationContext act=new ClassPathXmlApplicationContext("applicationContext.xml");
String[] str=act.getBeanDefinitionNames();
for (String string : str) {
System.out.println("..."+string);
}

这个问题我百度了两天了，有些方法也都试过了，哪位同学解决了麻烦给分享下解决的办法，谢谢了

Answer 1

谢谢各位，已经解决了，自己Sevlet和Biz层有new出来的类，没有让Spring 管理，所以导致SessionFactory没法注入。

Answer 2

代码日志发出来看看，怎么个空指针

Answer 3

applicationContext.xml发全点

Answer 4

Tomcat成功启动，

 八月 27, 2018 5:28:32 下午 org.apache.catalina.startup.VersionLoggerListener log
信息: Server version:        Apache Tomcat/9.0.10
八月 27, 2018 5:28:32 下午 org.apache.catalina.startup.VersionLoggerListener log
信息: Server built:          Jun 20 2018 17:32:21 UTC
八月 27, 2018 5:28:32 下午 org.apache.catalina.startup.VersionLoggerListener log
信息: Server number:         9.0.10.0
八月 27, 2018 5:28:32 下午 org.apache.catalina.startup.VersionLoggerListener log
信息: OS Name:               Windows 7
八月 27, 2018 5:28:32 下午 org.apache.catalina.startup.VersionLoggerListener log
信息: OS Version:            6.1
八月 27, 2018 5:28:32 下午 org.apache.catalina.startup.VersionLoggerListener log
信息: Architecture:          amd64
八月 27, 2018 5:28:32 下午 org.apache.catalina.startup.VersionLoggerListener log
信息: Java Home:             E:\zheng\java\jre1.8
八月 27, 2018 5:28:32 下午 org.apache.catalina.startup.VersionLoggerListener log
信息: JVM Version:           1.8.0_181-b13
八月 27, 2018 5:28:32 下午 org.apache.catalina.startup.VersionLoggerListener log
信息: JVM Vendor:            Oracle Corporation
八月 27, 2018 5:28:32 下午 org.apache.catalina.startup.VersionLoggerListener log
信息: CATALINA_BASE:         E:\zheng\software\eclipse\workspace\.metadata\.plugins\org.eclipse.wst.server.core\tmp0
八月 27, 2018 5:28:32 下午 org.apache.catalina.startup.VersionLoggerListener log
信息: CATALINA_HOME:         E:\zheng\software\Tomcat\apache-tomcat-9.0.10
八月 27, 2018 5:28:32 下午 org.apache.catalina.startup.VersionLoggerListener log
信息: Command line argument: -Dcatalina.base=E:\zheng\software\eclipse\workspace\.metadata\.plugins\org.eclipse.wst.server.core\tmp0
八月 27, 2018 5:28:32 下午 org.apache.catalina.startup.VersionLoggerListener log
信息: Command line argument: -Dcatalina.home=E:\zheng\software\Tomcat\apache-tomcat-9.0.10
八月 27, 2018 5:28:32 下午 org.apache.catalina.startup.VersionLoggerListener log
信息: Command line argument: -Dwtp.deploy=E:\zheng\software\eclipse\workspace\.metadata\.plugins\org.eclipse.wst.server.core\tmp0\wtpwebapps
八月 27, 2018 5:28:32 下午 org.apache.catalina.startup.VersionLoggerListener log
信息: Command line argument: -Djava.endorsed.dirs=E:\zheng\software\Tomcat\apache-tomcat-9.0.10\endorsed
八月 27, 2018 5:28:32 下午 org.apache.catalina.startup.VersionLoggerListener log
信息: Command line argument: -Dfile.encoding=UTF-8
八月 27, 2018 5:28:32 下午 org.apache.catalina.core.AprLifecycleListener lifecycleEvent
信息: The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: [E:\zheng\java\jre1.8\bin;C:\Windows\Sun\Java\bin;C:\Windows\system32;C:\Windows;E:/zheng/java/jre1.8/bin/server;E:/zheng/java/jre1.8/bin;E:/zheng/java/jre1.8/lib/amd64;C:\Program Files (x86)\Common Files\Oracle\Java\javapath;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Program Files (x86)\Windows Kits\8.1\Windows Performance Toolkit\;C:\Program Files (x86)\Microsoft SDKs\TypeScript\1.0\;C:\Program Files (x86)\Microsoft SQL Server\100\Tools\Binn\;C:\Program Files\Microsoft SQL Server\100\Tools\Binn\;C:\Program Files\Microsoft SQL Server\100\DTS\Binn\;C:\Program Files (x86)\Microsoft SQL Server\100\Tools\Binn\VSShell\Common7\IDE\;C:\Program Files (x86)\Microsoft Visual Studio 9.0\Common7\IDE\PrivateAssemblies\;C:\Program Files (x86)\Microsoft SQL Server\100\DTS\Binn\;.;E:\zheng\java\jdk1.8.0_181\bin;E:\zheng\java\jre1.8\bin;C:\Program Files\dotnet\;C:\Program Files\MySQL\MySQL Server 5.7\bin;E:\zheng\js\node\nodejs\;E:\zheng\software\vscode\Microsoft VS Code\bin;E:\zheng\github\git\Git\cmd;C:\Users\win7\AppData\Roaming\npm;E:\zheng\software\eclipse\eclipse;;.]
八月 27, 2018 5:28:33 下午 org.apache.coyote.AbstractProtocol init
信息: Initializing ProtocolHandler ["http-nio-8080"]
八月 27, 2018 5:28:33 下午 org.apache.tomcat.util.net.NioSelectorPool getSharedSelector
信息: Using a shared selector for servlet write/read
八月 27, 2018 5:28:33 下午 org.apache.coyote.AbstractProtocol init
信息: Initializing ProtocolHandler ["ajp-nio-8009"]
八月 27, 2018 5:28:33 下午 org.apache.tomcat.util.net.NioSelectorPool getSharedSelector
信息: Using a shared selector for servlet write/read
八月 27, 2018 5:28:33 下午 org.apache.catalina.startup.Catalina load
信息: Initialization processed in 749 ms
八月 27, 2018 5:28:33 下午 org.apache.catalina.core.StandardService startInternal
信息: Starting service [Catalina]
八月 27, 2018 5:28:33 下午 org.apache.catalina.core.StandardEngine startInternal
信息: Starting Servlet Engine: Apache Tomcat/9.0.10
八月 27, 2018 5:28:36 下午 org.apache.jasper.servlet.TldScanner scanJars
信息: At least one JAR was scanned for TLDs yet contained no TLDs. Enable debug logging for this logger for a complete list of JARs that were scanned but no TLDs were found in them. Skipping unneeded JARs during scanning can improve startup time and JSP compilation time.
八月 27, 2018 5:28:36 下午 org.apache.catalina.startup.HostConfig deployDescriptor
信息: Deploying deployment descriptor [E:\zheng\software\eclipse\workspace\.metadata\.plugins\org.eclipse.wst.server.core\tmp0\conf\Catalina\localhost\WaterWarm3.0.xml]
八月 27, 2018 5:28:36 下午 org.apache.catalina.startup.HostConfig deployDescriptor
警告: The path attribute with value [/WaterWarm3.0] in deployment descriptor [E:\zheng\software\eclipse\workspace\.metadata\.plugins\org.eclipse.wst.server.core\tmp0\conf\Catalina\localhost\WaterWarm3.0.xml] has been ignored
八月 27, 2018 5:28:36 下午 org.apache.catalina.startup.SetContextPropertiesRule begin
警告: [SetContextPropertiesRule]{Context} Setting property 'source' to 'org.eclipse.jst.jee.server:WaterWarm3.0' did not find a matching property.
八月 27, 2018 5:28:42 下午 org.apache.jasper.servlet.TldScanner scanJars
信息: At least one JAR was scanned for TLDs yet contained no TLDs. Enable debug logging for this logger for a complete list of JARs that were scanned but no TLDs were found in them. Skipping unneeded JARs during scanning can improve startup time and JSP compilation time.
八月 27, 2018 5:28:42 下午 org.apache.catalina.core.ApplicationContext log
信息: Initializing Spring root WebApplicationContext
八月 27, 2018 5:28:46 下午 org.apache.catalina.startup.HostConfig deployDescriptor
信息: Deployment of deployment descriptor [E:\zheng\software\eclipse\workspace\.metadata\.plugins\org.eclipse.wst.server.core\tmp0\conf\Catalina\localhost\WaterWarm3.0.xml] has finished in [10,474] ms
八月 27, 2018 5:28:46 下午 org.apache.coyote.AbstractProtocol start
信息: Starting ProtocolHandler ["http-nio-8080"]
八月 27, 2018 5:28:46 下午 org.apache.coyote.AbstractProtocol start
信息: Starting ProtocolHandler ["ajp-nio-8009"]
八月 27, 2018 5:28:46 下午 org.apache.catalina.startup.Catalina start
信息: Server startup in 13841 ms

Tomcat启动完成，请求自己的接口

请求接口时，报空指针异常， 空指针异常对象是SessionFactory
说明这个对象没有注入进去，

 null
八月 27, 2018 5:31:08 下午 org.apache.catalina.core.StandardWrapperValve invoke
严重: Servlet.service() for servlet [SaleLogin] in context with path [/WaterWarm3.0] threw exception
java.lang.NullPointerException
    at com.bigfire.daoimpl.SaleDaoImpl.findByNameAndPwd(SaleDaoImpl.java:61)
    at com.bigfire.bizimpl.SaleBizImpl.login(SaleBizImpl.java:21)
    at com.bigfire.sevlet.SaleLogin.doGet(SaleLogin.java:22)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:634)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
    at com.bigfire.filter.CORSFilter.doFilter(CORSFilter.java:21)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:491)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
    at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:668)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
    at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408)
    at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
    at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:764)
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1388)
    at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.lang.Thread.run(Unknown Source)

Answer 5

你虽然将SessionFactory对象注入进去了。但是你是用SessionFactory对象的这个类有没有注入进去？
即你在A类中使用B对象，你将B对象注入到了Spring容器，但是没有将A注入进去。Spring自然不会将B注入到A对象中，只是将B放在了容器中。

Answer 6

SaleDaoImpl类61行，什么代码

Answer 7

applicationContext.xml 文件

 <?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:p="http://www.springframework.org/schema/p"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:aop="http://www.springframework.org/schema/aop"
    xmlns:tx="http://www.springframework.org/schema/tx"
    xmlns:task="http://www.springframework.org/schema/task"
    xsi:schemaLocation="
    http://www.springframework.org/schema/beans
     http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
    http://www.springframework.org/schema/aop
     http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
    http://www.springframework.org/schema/context
     http://www.springframework.org/schema/context/spring-context-3.0.xsd
    http://www.springframework.org/schema/tx
     http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
     http://www.springframework.org/schema/task
     http://www.springframework.org/schema/task/spring-task-3.0.xsd 
     ">
    <!--spring扫描com.bigfire包下带有component注解的类 -->

    <context:component-scan base-package="com.bigfire"></context:component-scan>
    <context:annotation-config/>

    <!--spring开启事务注解 功能 
    <tx:annotation-driven transaction-manager="transactionManager"/>
    -->
    <tx:annotation-driven /> 
    <!--spring开启切面编程 功能 -->
    <aop:aspectj-autoproxy></aop:aspectj-autoproxy>
    <!--spring 数据库连接池 功能 -->
    <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
        <property name="driverClassName" value="com.mysql.jdbc.Driver"></property><!--数据库设备名称 -->
        <property name="url" value="jdbc:mysql:///bbase"></property>
        <property name="username" value="root"></property>
        <property name="password" value="123456"></property>

    </bean>
    <!-- Hibernate的SessionFactory 对象的创建交给 Spring 进行管理 -->
    <bean id="sessionFactory"  class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
        <!-- 引用上面的dataSource配置数据库 -->
        <property name="dataSource">
            <ref bean="dataSource" />
        </property>
        <!-- Hibernate的一些属性配置 -->
        <property name="hibernateProperties">
            <props>
                <prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop><!-- Hibernate的配置方言 -->
                <prop key="hibernate.show_sql">true</prop><!-- Hibernate生成的sql语句是否显示 -->
            </props>
        </property>

        <property name="mappingResources">
            <list>
                <!-- 
                <value>com/bigfire/entity/Address.hbm.xml</value>
                <value>com/bigfire/entity/Goods.hbm.xml</value>
                <value>com/bigfire/entity/Goodsclass.hbm.xml</value>
                <value>com/bigfire/entity/Goodsgroup.hbm.xml</value>
                <value>com/bigfire/entity/Mapping.hbm.xml</value>
                <value>com/bigfire/entity/Order.hbm.xml</value>
                <value>com/bigfire/entity/Orderdetails.hbm.xml</value>
                 -->
                <value>com/bigfire/entity/Sale.hbm.xml</value>
            </list>
        </property>

    </bean>
    <!--
    <bean id="SaleDaoImpl" class="com.bigfire.daoimpl.SaleDaoImpl">
        <property name="sessionFactory"> <ref bean="sessionFactory" /> </property>
    </bean>
    -->
    <!--hibernateTemplate的配置 -->
    <bean id="hibernateTemplate"
        class="org.springframework.orm.hibernate3.HibernateTemplate">
        <property name="sessionFactory" ref="sessionFactory"></property>
    </bean>
    <!--事务的配置 -->
    <bean id="transactionManager"
        class="org.springframework.orm.hibernate3.HibernateTransactionManager">
        <property name="sessionFactory" ref="sessionFactory"></property>
    </bean>
</beans>

Answer 8

hibernateTemplate已经注入了sessionfactory，不需要再次注入sessionfactory

Answer 9

既然结贴了，就别挂着了，
答题的人没必要再点进来，
需要解决该问题的人看到没结贴也不会进来，结贴了有助于需要帮助的人来借鉴问题的处理经验。