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org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'jpaMappingContext': Invocation of init method failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined
搭建的環境折騰了很久，以后遇到這種類似問題，原來是這個原因，已經哭暈
報錯現象：
javax.servlet.ServletException: Servlet.init() for servlet mvc-dispatcher threw exception org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:501) org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79) org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:610) org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:537) org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1085) org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:658) org.apache.coyote.http11.Http11NioProtocol$Http11ConnectionHandler.process(Http11NioProtocol.java:222) org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1556) org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1513) java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) java.lang.Thread.run(Thread.java:745)
root cause
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'jpaMappingContext': Invocation of init method failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in ServletContext resource [/WEB-INF/mvc-dispatcher-servlet.xml]: Error setting property values; nested exception is org.springframework.beans.NotWritablePropertyException: Invalid property 'packagesToScan' of bean class [org.springframework.orm.jpa.LocalEntityManagerFactoryBean]: Bean property 'packagesToScan' is not writable or has an invalid setter method. Does the parameter type of the setter match the return type of the getter? org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1578) org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:545) org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482) org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306) org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197) org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:753) org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:839) org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:538) org.springframework.web.servlet.FrameworkServlet.configureAndRefreshWebApplicationContext(FrameworkServlet.java:666) org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:632) org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:680) org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:551) org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:492) org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:136) javax.servlet.GenericServlet.init(GenericServlet.java:158) org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:501) org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79) org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:610) org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:537) org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1085) org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:658) org.apache.coyote.http11.Http11NioProtocol$Http11ConnectionHandler.process(Http11NioProtocol.java:222) org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1556) org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1513) java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) java.lang.Thread.run(Thread.java:745)
root cause
結果對比：
環境搭建的參考文章：http://my.oschina.net/gaussik/blog/513444,總是報錯，解決這個問題，搜了無數的帖子，通過對比原來是這個原因。
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貼上正確后的配置文件：
dispatcher-servlet-mvc.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:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:jpa="http://www.springframework.org/schema/data/jpa"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd
http://www.springframework.org/schema/data/jpa http://www.springframework.org/schema/data/jpa/spring-jpa.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd">
<!--指明 controller 所在包，并掃描其中的注解-->
<context:component-scan base-package="com.fastdfs.controller"/>
<!-- 靜態資源(js、p_w_picpath等)的訪問 -->
<mvc:default-servlet-handler/>
<!-- 開啟注解 -->
<mvc:annotation-driven/>
<!--ViewResolver 視圖解析器-->
<!--用于支持Servlet、JSP視圖解析-->
<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/pages/"/>
<property name="suffix" value=".jsp"/>
</bean>
<!--使用Spring的CommonsMultipartResolver上傳文件-->
<bean
id="multipartResolver"
class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
<property name="defaultEncoding" value="UTF-8"/>
<!-- one of the properties available; the maximum file size in bytes -->
<property name="maxUploadSize" value="100000000"/>
</bean>
<!-- 表示JPA Repository所在的包 -->
<jpa:repositories base-package="com.fastdfs.repository"/>
<bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
<property name="persistenceUnitName" value="FastDFSPersistenceUnit"/>
<property name="packagesToScan" value="com.fastdfs.model" />
<property name="jpaVendorAdapter">
<bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter"/>
</property>
<property name="jpaProperties">
<props>
<prop key="hibernate.connection.driver_class">com.mysql.jdbc.Driver</prop>
<prop key="hibernate.connection.url">jdbc:mysql://192.168.200.33:3306/fastdfs?useSSL=false</prop>
<prop key="hibernate.connection.username">adminuser</prop>
<prop key="hibernate.connection.password">localadmin2015!</prop>
<prop key="hibernate.show_sql">false</prop>
<prop key="hibernate.connection.useUnicode">true</prop>
<prop key="hibernate.connection.characterEncoding">UTF-8</prop>
<prop key="hibernate.format_sql">true</prop>
<prop key="hibernate.use_sql_comments">true</prop>
<prop key="hibernate.hbm2ddl.auto">update</prop>
<prop key="hibernate.connection.autoReconnect">true</prop>
<prop key="hibernate.dialect">org.hibernate.dialect.MySQL5Dialect</prop>
<prop key="connection.autoReconnectForPools">true</prop>
<prop key="connection.is-connection-validation-required">true</prop>
<prop key="hibernate.c3p0.validate">true</prop>
<prop key="hibernate.connection.provider_class">org.hibernate.service.jdbc.connections.internal.C3P0ConnectionProvider</prop>
<prop key="hibernate.c3p0.min_size">5</prop>
<prop key="hibernate.c3p0.max_size">600</prop>
<prop key="hibernate.c3p0.timeout">1800</prop>
<prop key="hibernate.c3p0.max_statements">50</prop>
<prop key="hibernate.c3p0.preferredTestQuery">SELECT 1;</prop>
<prop key="hibernate.c3p0.testConnectionOnCheckout">true</prop>
<prop key="hibernate.c3p0.idle_test_period">3000</prop>
</props>
</property>
</bean>
<!-- 事務管理 -->
<bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
<property name="entityManagerFactory" ref="entityManagerFactory"/>
</bean>
<!-- 開啟事務管理注解 -->
<tx:annotation-driven transaction-manager="transactionManager"/>
</beans>
########################################################################################
2.persistences.xml
<?xml version="1.0" encoding="UTF-8"?>
<persistence version="2.0" xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd">
<persistence-unit name="FastDFSPersistenceUnit" transaction-type="RESOURCE_LOCAL">
<provider>org.hibernate.ejb.HibernatePersistence</provider>
<properties>
<!-- 使用MySQL方言 -->
<property name="hibernate.dialect" value="org.hibernate.dialect.MySQL5Dialect"/>
<!-- 數據庫連接的URL地址 -->
<property name="hibernate.connection.url"
value="jdbc:mysql://192.168.200.33:3306/fastdfs"/>
<!-- 數據庫連接的驅動 -->
<property name="hibernate.connection.driver_class" value="com.mysql.jdbc.Driver"/>
<!-- 數據庫連接的用戶名 -->
<property name="hibernate.connection.username" value="****" />
<!-- 數據庫連接的密碼 -->
<property name="hibernate.connection.password" value="******"/>
<!-- 顯示SQL語句 -->
<property name="hibernate.show_sql" value="true"/>
<property name="hibernate.connection.useUnicode" value="true"/>
<property name="hibernate.connection.characterEncoding" value="UTF-8"/>
<!-- 在顯示SQL語句時格式化語句 -->
<property name="hibernate.format_sql" value="true"/>
<property name="hibernate.use_sql_comments" value="false"/>
<!-- 自動輸出schema創建DDL語句 -->
<property name="hibernate.hbm2ddl.auto" value="update"/>
<!-- 數據庫連接超時后自動重連 -->
<property name="hibernate.connection.autoReconnect" value="true"/>
<property name="connection.autoReconnectForPools" value="true"/>
<property name="connection.is-connection-validation-required" value="true"/>
</properties>
</persistence-unit>
</persistence>
########################################################################################
項目已經跑通，fastdfs+springmvc+ spring data jpa +hibernate +fastdfs java api
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