java - Spring JPA 没有正在进行的事务

标签 java spring hibernate spring-mvc jpa

我是 Spring 和 JPA 的新手，浪费了 5 天时间，搜索互联网没有结果。我想将对象保存到 SQL SERVER，连接正确，但是当我编写 .flush() 时出现异常

nested exception is javax.persistence.TransactionRequiredException: no transaction is in progress

这是我的 jpaContext.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: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-3.1.xsd
    http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.1.xsd">

<context:annotation-config />
<context:component-scan base-package="com.misha.service"/>
<context:component-scan base-package="com.misha.repository"/>
<context:component-scan base-package="com.misha.model"/>

<bean
    class="org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor" />

<bean id="myEntityManager"
    class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
    <property name="dataSource" ref="dataSource" />
    <property name="packagesToScan" value="com.misha.model"/>
    <property name="persistenceUnitName" value="test" /> 
    <property name="jpaVendorAdapter">
        <bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter" />
    </property>
    <property name="jpaProperties">
        <props>
            <prop key="hibernate.format_sql">true</prop>
            <prop key="hibernate.hbm2ddl.auto">create</prop>
            <prop key="hibernate.dialect">org.hibernate.dialect.SQLServerDialect</prop>
        </props>
    </property>
</bean>
<bean id="dataSource"
    class="org.springframework.jdbc.datasource.DriverManagerDataSource">
    <property name="driverClassName" value="net.sourceforge.jtds.jdbc.Driver" />
    <property name="url"
        value="jdbc:jtds:sqlserver://127.0.0.1;instance=SQLEXPRESS;DatabaseName=misha" />
    <property name="username" value="sa" />
    <property name="password" value="root" />
</bean>

<bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
    <property name="entityManagerFactory" ref="myEntityManager" />
</bean>

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

</beans>

这是我的 persistence.xml 文件:

<?xml version="1.0" encoding="UTF-8"?>
<persistence version="2.1" xmlns="http://xmlns.jcp.org/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/persistence http://xmlns.jcp.org/xml/ns/persistence/persistence_2_1.xsd">
    <persistence-unit name="test" >
        <class>com.misha.model.Table1</class>
    </persistence-unit> 
</persistence>

这是我的服务实现:

@Service("manService")
public class SaveManImpl implements SaveMan {
//  
    @Autowired
    private ManRepositoryImpl manRepo;


    @Transactional
    public Table1 save(Table1 table) {
        manRepo.save(table);
        return null;
    }

}

最后是我的存储库实现:

@Repository("manRepository")
public class ManRepositoryImpl implements ManRepository {

    @PersistenceContext
    private EntityManager em;   

    public Table1 save(Table1 table){
        em.persist(table);
        em.flush();
        return table;
    }
}

从异常中，Spring 看不到 @Transactional 注释，对吗？我试着把注解放在repository save方法上面，没有结果，在上面这个Service save方法之后，这里也一样。提前致谢

enter image description here

我在 Controller 中调用 save 方法

    package com.misha.controllers;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.web.bind.annotation.RequestMapping;

import com.misha.model.Table1;
import com.misha.service.SaveMan;

@Controller
public class ManController {
    @Autowired 
    SaveMan saveMan; // this is service interface


    @RequestMapping(value="/test1")
    public String saveMan(){
        Table1 tab = new Table1();
        tab.setName("name");
        saveMan.save(tab);          
        return "saveMan";
    }   
}

错误堆栈:

SEVERE: Servlet.service() for servlet [fitTrackerServlet] in context with path [/test] threw exception [Request processing failed; nested exception is javax.persistence.TransactionRequiredException: no transaction is in progress] with root cause
javax.persistence.TransactionRequiredException: no transaction is in progress
    at org.hibernate.jpa.spi.AbstractEntityManagerImpl.checkTransactionNeeded(AbstractEntityManagerImpl.java:1171)
    at org.hibernate.jpa.spi.AbstractEntityManagerImpl.flush(AbstractEntityManagerImpl.java:1332)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at org.springframework.orm.jpa.ExtendedEntityManagerCreator$ExtendedEntityManagerInvocationHandler.invoke(ExtendedEntityManagerCreator.java:365)
    at com.sun.proxy.$Proxy20.flush(Unknown Source)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at org.springframework.orm.jpa.SharedEntityManagerCreator$SharedEntityManagerInvocationHandler.invoke(SharedEntityManagerCreator.java:240)
    at com.sun.proxy.$Proxy20.flush(Unknown Source)
    at com.misha.repository.ManRepositoryImpl.save(ManRepositoryImpl.java:21)
    at com.misha.service.SaveManImpl.save(SaveManImpl.java:19)
    at com.misha.controllers.ManController.saveMan(ManController.java:21)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at org.springframework.web.bind.annotation.support.HandlerMethodInvoker.invokeHandlerMethod(HandlerMethodInvoker.java:175)
    at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.invokeHandlerMethod(AnnotationMethodHandlerAdapter.java:421)
    at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.handle(AnnotationMethodHandlerAdapter.java:409)
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:774)
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:719)
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:644)
    at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:549)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:618)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:725)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:291)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:219)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:501)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:142)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
    at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:610)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:537)
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1085)
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:658)
    at org.apache.coyote.http11.Http11NioProtocol$Http11ConnectionHandler.process(Http11NioProtocol.java:222)
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1556)
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1513)
    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)

Spring 配置文件

<?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:mvc="http://www.springframework.org/schema/mvc"
    xmlns:context="http://www.springframework.org/schema/context"
    xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.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-3.1.xsd">

    <mvc:annotation-driven />
    <!--<mvc:resources location="pdfs" mapping="/pdfs/**" />
    <mvc:resources location="/resources" mapping="/resources/**"/> -->
    <context:component-scan base-package="com.misha.controllers"></context:component-scan>
    <context:component-scan base-package="com.misha.repository" />
    <context:component-scan base-package="com.misha.service" />

    <context:annotation-config/>

    <bean
        class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/jsp/"></property>
        <property name="suffix" value=".jsp"></property>
        <property name="order" value="0"></property>
    </bean>


<bean id="contentNegotiatingViewResolver"
class="org.springframework.web.servlet.view.ContentNegotiatingViewResolver">
  <property name="order" value="1" />
  <property name="mediaTypes">
    <map>
      <entry key="json" value="application/json" />
      <entry key="xml" value="application/xml" />
      <entry key="request" value="text/html" />
    </map>
  </property>
  <property name="favorPathExtension" value="false" />
  <property name="favorParameter" value="true" />
  <property name="defaultViews">
    <list>

    </list>
  </property>
</bean>

<bean class="org.springframework.context.support.ResourceBundleMessageSource"  >
    <property name="basename" value="WEB-INF/messages"></property>

</bean>


</beans>

最佳答案

你有两个 Spring 上下文:

  1. 主要的，由 jpaContext.xml 配置，其中来自服务和存储库包的 bean 被扫描，并由事务拦截器代理。

  2. mvc 一个，由另一个 xml 文件(您没有命名它)配置，其作用是描述应用程序的 MVC 部分，即定义和配置例如 Controller bean、 View 解析器、等等。这个上下文是主上下文的子上下文。

问题在于您还扫描了此子上下文中的服务和存储库包。因此，您最终会得到每个服务和存储库的两个实例:

  • 主要上下文中的一个，它是事务性的
  • 子上下文中的一个，而不是(因为子上下文不关心事务管理)

因此， Controller 被注入(inject)了来自与 Controller 相同上下文的服务:非事务性的。

要确认这一点，您可以在 bean 的构造函数中添加跟踪，看看它们被实例化了多少次。

为了避免这个问题，有两种解决方案:

  • 避免在 mvc 上下文中扫描存储库和服务包:此上下文应该只关心与 mvc 相关的 bean。当 Spring 在 Controller 中注入(inject)服务时，它不会在 mvc 上下文中找到该服务，因此会查找它，并在主上下文中找到它。事务服务将因此被注入(inject)。
  • 使用单一上下文:servlet 的上下文，其中定义了应用程序中的所有 bean。

关于java - Spring JPA 没有正在进行的事务，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/28950134/

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