Spring MVC+Hibernate JPA搭建的博客系统项目中所遇到的坑

 

标签： springmvc hibernate

2016年12月21日 21:48:035133人阅读 评论(0) 收藏 举报

 分类：

Spring/Spring MVC（6）   Hibernate（1） 

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目录(?)[+]

 

项目代码地址：https://github.com/zhisheng17/springmvc

如果觉得不错的话，欢迎给个 star ， 如果你想完善这个项目的话，你也可以 fork 后修改然后推送给我。

最近在学习 Spring MVC ，其中在做一个简单的博客系统demo，是使用 SpringMVC 集成

Spring Data JPA（由 Hibernate JPA 提供），来进行强大的数据库访问。结果其中遇到的坑不

是一点点啊，我差点崩溃了，其中最大的原因就是由于 Hibernate JPA 中的bug了，反正一开始

还不知道是这个问题，导致折腾了快一天的时间。想想都可怕啊。

mvc-dispatch-servlet.xml代码

<?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，并扫描其中的注解--> <context:component-scan base-package="cn.zhisheng.controller"/> <!-- 静态资源(js、image等)的访问 --> <mvc:default-servlet-handler/> <!-- 开启注解 --> <mvc:annotation-driven/> <!--ViewResolver 视图解析器--> <!--用于支持Servlet、JSP视图解析--> <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> <!-- 表示JPA Repository所在的包 --> <jpa:repositories base-package="cn.zhisheng.repository"/> <bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean"> <property name="persistenceUnitName" value="defaultPersistenceUnit"/> <property name="packagesToScan" value="cn.zhisheng.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://localhost:3306/springdemo?useSSL=false</prop> <prop key="hibernate.connection.username">root</prop> <prop key="hibernate.connection.password">root</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> <prop key="javax.persistence.validation.mode">none</prop> </props> </