Question

我尝试在hibernate / spring中使用ehcache。我的尝试是投掷NPE。

我很难坚持下去。并且，谷歌搜索没有帮助。

Caused by: java.lang.NullPointerException
 at net.sf.ehcache.hibernate.HibernateUtil.loadAndCorrectConfiguration(HibernateUtil.java:48)
 at net.sf.ehcache.hibernate.EhCacheRegionFactory.start(EhCacheRegionFactory.java:79)
 at org.hibernate.impl.SessionFactoryImpl.<init>(SessionFactoryImpl.java:236)
 at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1842)
 at org.springframework.orm.hibernate3.LocalSessionFactoryBean.newSessionFactory(LocalSessionFactoryBean.java:855)
 at org.springframework.orm.hibernate3.LocalSessionFactoryBean.buildSessionFactory(LocalSessionFactoryBean.java:774)
 at org.springframework.orm.hibernate3.AbstractSessionFactoryBean.afterPropertiesSet(AbstractSessionFactoryBean.java:211)
 at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1469)
 at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1409)
 ... 99 more

这是我的弹簧配置：

<bean id="sessionFactory" class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">
    <property name="dataSource" ref="myDataSource"/>
    <property name="annotatedClasses">
        <list>
            <value>com.agriserver.domain.AaFriend</value>
        </list>
    </property>
<property name="hibernateProperties">
    <props>
        <prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
        <prop key="hibernate.show_sql">true</prop>

        <!-- Enable EHCache -->
        <prop key="hibernate.cache.use_second_level_cache">true</prop>
        <prop key="hibernate.cache.use_query_cache">false</prop>
        <prop key="hibernate.cache.region.factory_class">net.sf.ehcache.hibernate.EhCacheRegionFactory</prop>
        <prop key="net.sf.ehcache.configurationResourceName">/ehcache.xml</prop>
    </props>
</property>

这是ehcache.xml：

<?xml version="1.0" encoding="UTF-8"?>

<ehcache>
    <diskStore path="java.io.tmpdir"/>

    <cache
            name="com.agriserver.domain.AaFriend"
            maxElementsInMemory="10"
            maxElementsOnDisk="1000"
            eternal="false"
            timeToIdleSeconds="300"
            timeToLiveSeconds="600"
            overflowToDisk="true"
            />

    <cache
            name="org.hibernate.cache.StandardQueryCache"
            maxElementsInMemory="1"
            eternal="false"
            timeToLiveSeconds="120"
            overflowToDisk="false"/>
</ehcache>

摘自pom.xml以显示jar文件的版本：

<properties>
    <cxf.version>2.2.7</cxf.version>
    <spring.version>3.0.4.RELEASE</spring.version>
    <hibernate.version>3.6.0.Final</hibernate.version>
    <hibernate.annotations.version>3.3.0.ga</hibernate.annotations.version>
    <facebook.version>3.0.2</facebook.version>
</properties>

<dependencies>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-core</artifactId>
        <version>${spring.version}</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-beans</artifactId>
        <version>${spring.version}</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-context</artifactId>
        <version>${spring.version}</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-context-support</artifactId>
        <version>${spring.version}</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-aop</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>${spring.version}</version>
    </dependency>
    <dependency>
        <groupId>org.springframework.security</groupId>
        <artifactId>spring-security-web</artifactId>
        <version>${spring.version}</version>
    </dependency>
    <dependency>
        <groupId>org.springframework.security</groupId>
        <artifactId>spring-security-config</artifactId>
        <version>${spring.version}</version>
    </dependency>
    <dependency>
        <groupId>org.springframework.security</groupId>
        <artifactId>spring-security-taglibs</artifactId>
        <version>${spring.version}</version>
    </dependency>
    <dependency>
        <groupId>org.springmodules</groupId>
        <artifactId>spring-modules-validation</artifactId>
        <version>0.8</version>
        <exclusions>
            <exclusion>
                <groupId>org.springframework</groupId>
                <artifactId>spring</artifactId>
                <!--<version>2.03</version>-->
            </exclusion>
        </exclusions>
    </dependency>


    <dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>servlet-api</artifactId>
        <version>2.4</version>
        <scope>provided</scope>
    </dependency>
    <dependency>
        <groupId>javax.servlet.jsp</groupId>
        <artifactId>jsp-api</artifactId>
        <version>2.0</version>
        <scope>provided</scope>
    </dependency>

    <dependency>
        <groupId>org.hibernate</groupId>
        <artifactId>hibernate-core</artifactId>
        <version>${hibernate.version}</version>
        <exclusions>
            <exclusion>
                <groupId>javax.transaction</groupId>
                <artifactId>jta</artifactId>
            </exclusion>
            <exclusion>
                <groupId>net.sf.ehcache</groupId>
                <artifactId>ehcache</artifactId>
            </exclusion>
        </exclusions>
    </dependency>
    <dependency>
        <groupId>net.sf.ehcache</groupId>
        <artifactId>ehcache-core</artifactId>
        <version>2.2.0</version>
        <!--<type>pom</type>-->
    </dependency>
    <dependency>
        <groupId>org.slf4j</groupId>
        <artifactId>slf4j-log4j12</artifactId>
        <version>1.6.1</version>
    </dependency>
    <dependency>
        <groupId>javassist</groupId>
        <artifactId>javassist</artifactId>
        <version>3.8.0.GA</version>
    </dependency>
    <dependency>
        <groupId>cglib</groupId>
        <artifactId>cglib</artifactId>
        <version>2.2</version>
    </dependency>

任何提示？

Answer 1

通过将以下内容添加到ehcache.xml看起来问题就消失了。很奇怪，因为我从ehcache网站的入门部分复制并粘贴了我的ehcache.xml。并且，它没有那个部分：

<defaultCache
        maxElementsInMemory="10000"
        eternal="false"
        timeToIdleSeconds="120"
        timeToLiveSeconds="120"
        overflowToDisk="true"
        maxElementsOnDisk="10000000"
        diskPersistent="false"
        diskExpiryThreadIntervalSeconds="120"
        memoryStoreEvictionPolicy="LRU"
        />

EHCache loadAndCorrectConfiguration NPE

1 个答案: