Question

我是Spring-MVC和Hibernate的新手。尝试使用 Spring-MVC（4.0.3）， Hibernate（4.3.5）创建测试Web应用程序，并使用 MySQL 作为后端

连接到数据库没有问题，因为我尝试使用简单的JDBC连接语句从示例testJavaClass中的同一个数据库中获取数据，并且我能够获取记录。

错误日志：

org.springframework.web.util.NestedServletException: Request processing failed; nested exception is  org.springframework.transaction.CannotCreateTransactionException: Could not open Hibernate Session for transaction; nested exception is   org.hibernate.exception.JDBCConnectionException: Could not open connection
 org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:973)
org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:852)
javax.servlet.http.HttpServlet.service(HttpServlet.java:620)
org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:837)
javax.servlet.http.HttpServlet.service(HttpServlet.java:727)

root cause

 org.springframework.transaction.CannotCreateTransactionException: Could not open Hibernate Session for transaction; nested exception is org.hibernate.exception.JDBCConnectionException: Could not open connection
org.springframework.orm.hibernate4.HibernateTransactionManager.doBegin(HibernateTransactionManager.java:515)
org.springframework.transaction.support.AbstractPlatformTransactionManager.getTransaction(AbstractPlatformTransactionManager.java:373)
org.springframework.transaction.interceptor.TransactionAspectSupport.createTransactionIfNecessary(TransactionAspectSupport.java:420)
org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:257)
org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:95)
org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:207)
com.sun.proxy.$Proxy130.listPersons(Unknown Source)
com.journeldev.spring.PersonController.listPersons(PersonController.java:29)
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
java.lang.reflect.Method.invoke(Method.java:606)
org.springframework.web.method.support.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:215)
org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:132)
org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:104)
org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:749)
org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:689)
org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:83)
org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:938)
org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:870)
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:961)
org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:852)
javax.servlet.http.HttpServlet.service(HttpServlet.java:620)
org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:837)
javax.servlet.http.HttpServlet.service(HttpServlet.java:727)

这是我的pom.xml：

   <project xmlns="http://maven.apache.org/POM/4.0.0"   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>org.raju.spring</groupId>
    <artifactId>spring-mvc-hibernate</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>war</packaging>

  <properties>
    <java-version>1.7</java-version>
    <org.springframework-version>4.0.3.RELEASE</org.springframework-version>
    <org.aspectj-version>1.7.4</org.aspectj-version>
    <org.slf4j-version>1.7.5</org.slf4j-version>
    <hibernate.version>4.3.5.Final</hibernate.version>
</properties>

<dependencies>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-context</artifactId>
        <version>${org.springframework-version}</version>
        <exclusions>
            <!-- Exclude Commons Logging in favor of SLF4j -->
            <exclusion>
                <groupId>commons-logging</groupId>
                <artifactId>commons-logging</artifactId>
             </exclusion>
        </exclusions>
    </dependency>

    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-webmvc</artifactId>
        <version>${org.springframework-version}</version>
    </dependency>

    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-tx</artifactId>
        <version>${org.springframework-version}</version>
    </dependency>

    <dependency>
        <groupId>org.hibernate</groupId>
        <artifactId>hibernate-core</artifactId>
        <version>${hibernate.version}</version>
    </dependency>

    <dependency>
        <groupId>org.hibernate</groupId>
        <artifactId>hibernate-entitymanager</artifactId>
        <version>${hibernate.version}</version>
    </dependency>

    <!-- Apache Commons DBCP -->
    <dependency>
        <groupId>commons-dbcp</groupId>
        <artifactId>commons-dbcp</artifactId>
        <version>1.4</version>
    </dependency>

    <!-- Spring ORM -->
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-orm</artifactId>
        <version>${org.springframework-version}</version>
    </dependency>

    <!-- AspectJ -->
    <dependency>
        <groupId>org.aspectj</groupId>
        <artifactId>aspectjrt</artifactId>
        <version>${org.aspectj-version}</version>
    </dependency>

    <!-- Logging -->
    <dependency>
        <groupId>org.slf4j</groupId>
        <artifactId>slf4j-api</artifactId>
        <version>${org.slf4j-version}</version>
    </dependency>

    <dependency>
        <groupId>org.slf4j</groupId>
        <artifactId>jcl-over-slf4j</artifactId>
        <version>${org.slf4j-version}</version>
        <scope>runtime</scope>
    </dependency>

    <dependency>
        <groupId>org.slf4j</groupId>
        <artifactId>slf4j-log4j12</artifactId>
        <version>${org.slf4j-version}</version>
        <scope>runtime</scope>
    </dependency>

    <dependency>
        <groupId>log4j</groupId>
        <artifactId>log4j</artifactId>
        <version>1.2.15</version>
        <exclusions>
            <exclusion>
                <groupId>javax.mail</groupId>
                <artifactId>mail</artifactId>
            </exclusion>
            <exclusion>
                <groupId>javax.jms</groupId>
                <artifactId>jms</artifactId>
            </exclusion>
            <exclusion>
                <groupId>com.sun.jdmk</groupId>
                <artifactId>jmxtools</artifactId>
            </exclusion>
            <exclusion>
                <groupId>com.sun.jmx</groupId>
                <artifactId>jmxri</artifactId>
            </exclusion>
        </exclusions>
        <scope>runtime</scope>
    </dependency>

    <!-- @Inject -->
    <dependency>
        <groupId>javax.inject</groupId>
        <artifactId>javax.inject</artifactId>
        <version>1</version>
    </dependency>

    <!-- Servlet -->
    <dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>servlet-api</artifactId>
        <version>2.5</version>
        <scope>provided</scope>
    </dependency>

    <dependency>
        <groupId>javax.servlet.jsp</groupId>
        <artifactId>jsp-api</artifactId>
        <version>2.1</version>
        <scope>provided</scope>
    </dependency>

    <dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>jstl</artifactId>
        <version>1.2</version>
    </dependency>

    <!-- Test -->
    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>4.7</version>
        <scope>test</scope>
    </dependency>

    <!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>5.1.6</version>
    </dependency>

</dependencies>

<build>
    <plugins>
        <plugin>
            <artifactId>maven-eclipse-plugin</artifactId>
                <version>2.9</version>
                <configuration>
                    <additionalProjectnatures>
                         <projectnature>org.springframework.ide.eclipse.core.springnature</projectnature>
                    </additionalProjectnatures>
                    <additionalBuildcommands>
                        <buildcommand>org.springframework.ide.eclipse.core.springbuilder</buildcommand>
                    </additionalBuildcommands>
                    <downloadSources>true</downloadSources>
                    <downloadJavadocs>true</downloadJavadocs>
                </configuration>
        </plugin>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
            <version>2.5.1</version>
            <configuration>
                <source>1.6</source>
                <target>1.6</target>
                <compilerArgument>-Xlint:all</compilerArgument>
                <showWarnings>true</showWarnings>
                <showDeprecation>true</showDeprecation>
            </configuration>
        </plugin>
        <plugin>
            <groupId>org.codehaus.mojo</groupId>
            <artifactId>exec-maven-plugin</artifactId>
            <version>1.2.1</version>
            <configuration>
                <mainClass>org.test.int1.Main</mainClass>
            </configuration>
        </plugin>
    </plugins>
    <finalName>${project.artifactId}</finalName>
   </build>
  </project>

Eclipse中的项目结构：

servlet-context.xml :(根据@Maciej Kowalski的回答更新，我仍然看到同样的问题）

 <?xml version="1.0" encoding="UTF-8"?>
 <beans:beans xmlns="http://www.springframework.org/schema/mvc"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:beans="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:aop="http://www.springframework.org/schema/aop"
xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd
    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/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd http://www.springframework.org/schema/aop
    http://www.springframework.org/schema/aop/spring-aop-3.0.xsd">

<!-- DispatcherServlet Context: defines this servlet's request-processing 
    infrastructure -->

<!-- Enables the Spring MVC @Controller programming model -->
<annotation-driven />

<!-- Handles HTTP GET requests for /resources/** by efficiently serving 
    up static resources in the ${webappRoot}/resources directory -->
<resources mapping="/resources/**" location="/resources/" />

<!-- Resolves views selected for rendering by @Controllers to .jsp resources 
    in the /WEB-INF/views directory -->
<beans:bean
    class="org.springframework.web.servlet.view.InternalResourceViewResolver">
    <beans:property name="prefix" value="/WEB-INF/views/" />
    <beans:property name="suffix" value=".jsp" />
</beans:bean>

<beans:bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
    destroy-method="close">
    <beans:property name="driverClassName" value="com.mysql.jdbc.Driver" />
    <beans:property name="url"
        value="jdbc:mysql://localhost:3307/rajuDB" />
    <beans:property name="username" value="raju" />
    <beans:property name="password" value="raju" />
</beans:bean>

<!-- Hibernate 4 SessionFactory Bean definition -->
<beans:bean id="hibernate4AnnotatedSessionFactory"
    class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
    <beans:property name="dataSource" ref="dataSource" />
    <beans:property name="annotatedClasses">
        <beans:list>
            <beans:value>com.journeldev.spring.model.Person</beans:value>
        </beans:list>
    </beans:property>
    <beans:property name="hibernateProperties">
        <beans:props>
            <beans:prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect
            </beans:prop>
            <beans:prop key="hibernate.show_sql">true</beans:prop>
        </beans:props>
    </beans:property>
</beans:bean>

<beans:bean id="personDAO" class="com.journeldev.spring.dao.PersonDAOImpl">
    <beans:property name="sessionFactory" ref="hibernate4AnnotatedSessionFactory" />
</beans:bean>
<beans:bean id="personService" class="com.journeldev.spring.service.PersonServiceImpl">
    <beans:property name="personDAO" ref="personDAO"></beans:property>
</beans:bean>

<!-- the transactional advice (what 'happens'; see the <aop:advisor/> bean below) -->

<context:component-scan base-package="com.journeldev.spring" />

<tx:annotation-driven transaction-manager="transactionManager"/>

<beans:bean id="transactionManager" class="org.springframework.orm.hibernate4.HibernateTransactionManager">
    <beans:property name="sessionFactory" ref="hibernate4AnnotatedSessionFactory" />
 </beans:bean>

 <tx:advice id="txAdvice" transaction-manager="transactionManager">
    <!-- the transactional semantics... -->
    <tx:attributes>
        <!-- all methods starting with 'get' are read-only -->
        <tx:method name="get*" read-only="true"/>
        <!-- other methods use the default transaction settings (see below) -->
        <tx:method name="*"/>
    </tx:attributes>
 </tx:advice>

 <!-- ensure that the above transactional advice runs for any execution
    of an operation defined by the FooService interface -->
 <aop:config>
    <aop:pointcut id="personServiceOperation" expression="execution(* com.journeldev.spring.service.PersonServiceImpl.*(..))"/>
    <aop:advisor advice-ref="txAdvice" pointcut-ref="personServiceOperation"/>
 </aop:config>
 </beans:beans>

我已经检查了互联网上的很多其他线程，并尝试更改我的servlet-context.xml文件，但没有解决我的问题。

例如：尝试根据此StackOverflow Thread添加额外参数，如下所示

    <beans:property name="initialSize" value="7"/>
    <beans:property name="maxActive" value="7"/>
    <beans:property name="maxWait" value="10000"/>
    <beans:property name="validationQuery" value="SELECT 1" />
    <beans:property name="validationQueryTimeout" value="34000" />
    <beans:property name="testOnBorrow" value="true" />

结果：问题仍然存在：

例2：尝试根据此StackOverflow Thread更改数据源，如下所示

<beans:bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
    <beans:property name="driverClassName" value="com.mysql.jdbc.Driver" />
    <beans:property name="url"
        value="jdbc:mysql://localhost:3307/rajuDB" />
    <beans:property name="username" value="raju" />
    <beans:property name="password" value="raju" />
</beans:bean>

结果：问题仍然相同

根据@James Jithin的评论更新：2017年2月19日

try{
        Class.forName("com.mysql.jdbc.Driver");
        Connection  conn=DriverManager.getConnection("jdbc:mysql://localhost:3307/rajuDB", "raju", "raju");
        Statement state=conn.createStatement();
        ResultSet rs=state.executeQuery("select * from Person");

        if(rs!=null && rs.next())
        {
            System.out.println("conn connected");
        }
        else
        {
            System.out.println("not connected");
        }
    }
    catch(Exception e){

    }

Answer 1

您应该信任错误消息：

org.hibernate.exception.JDBCConnectionException：无法打开连接

仅仅因为您可以使用mySql客户端应用程序连接到数据库，并不意味着您可以通过TCP访问数据库。 MySQL可以通过TCP端口连接，也可以使用管道连接。您的mySql客户端可能使用命名管道连接到数据库。

https://dev.mysql.com/doc/refman/5.7/en/connecting.html

Answer 2

您已在xml文件中定义了personService，但您尝试通过注释向其添加事务行为。不是100％肯定，但我会一直坚持xml定义并在那里添加事务配置：

<!-- the transactional advice (what 'happens'; see the <aop:advisor/> bean below) -->
    <tx:advice id="txAdvice" transaction-manager="txManager">
        <!-- the transactional semantics... -->
        <tx:attributes>
            <!-- all methods starting with 'get' are read-only -->
            <tx:method name="get*" read-only="true"/>
            <!-- other methods use the default transaction settings (see below) -->
            <tx:method name="*"/>
        </tx:attributes>
    </tx:advice>

    <!-- ensure that the above transactional advice runs for any execution
        of an operation defined by the FooService interface -->
    <aop:config>
        <aop:pointcut id="personServiceOperation" expression="execution(* com.journeldev.spring.service.PersonServiceImpl.*(..))"/>
        <aop:advisor advice-ref="txAdvice" pointcut-ref="personServiceOperation"/>
    </aop:config>

同样从服务中删除@Transactional注释以防万一。

示例基于：Spring Transaction Management Article。它包含有关如何使用xml配置使整个服务层进行事务处理的信息。

Answer 3

那是我犯过的一个错误。我道歉。代码和xml配置文件没有问题。

初始计划：我在虚拟机中设置MySql并在端口3306下运行.planet是从我的主机上运行的tomcat实例运行应用程序。因此，我已经启动了从主机到VM的端口转发，端口3307-> 3306和远程用户＆＃39; raju＆＃39;在MYSql中创建，以便能够从我的主机（在主机中运行的tomcat）进行连接。

错误:(由于一些不可解释的原因）。我决定   在运行的单独tomcat实例中运行该应用程序   我的虚拟机。在这种情况下，tomcat和MySQL都将运行   在同一台机器上。

1：所以我没有必要直接使用PORT FORWARDING   港口3306。

2：我已授予当前远程用户（＆＃39; raju＆＃39;）的许可   能够以本地连接

grant all privileges on rajuDB.* to 'raju'@'localhost' identified by 'XXXX';

最终结果：现在我可以从数据库中获取详细信息。每件事都按预期工作。

Answer 4

如果发现连接代码的每一位都是正确的，则应检查与Spring兼容的Mysql版本。某些旧版本不适用于Spring最新版本。

无法打开Hibernate Session进行事务处理;嵌套异常是org.hibernate.exception.JDBCConnectionException：无法打开连接

4 个答案: