我目前正在开发一个Maven + Spring + Hibernate项目。实际上，这只是一个测试项目，只是为了熟悉Spring如何使用Hibernate（+ Maven）。我已经设置并准备了必要的依赖项。例如，Spring的appcontext.xml，Hibernate的persistence.xml，JPA / Persistence / Hibernate的实体和DAO对象。
在调试期间，persist方法抛出Transactionrequiredexception，没有正在进行的事务。我不知道造成这种情况的原因
的web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" version="2.5">
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>
/WEB-INF/applicationContext-datasource.xml
/WEB-INF/applicationContext.xml
</param-value>
</context-param>
<servlet>
<servlet-name>appServlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/applicationContext-servlet.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>appServlet</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>
应用servlet.xml中
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
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">
<!-- DispatcherServlet Context: defines this servlet's request-processing infrastructure -->
<!-- Enables the Spring MVC @Controller programming model -->
<mvc:annotation-driven />
<context:component-scan base-package="com.names.home" />
<!-- Default locale set -->
<bean id="localeResolver" class="org.springframework.web.servlet.i18n.CookieLocaleResolver">
<property name="defaultLocale" value="en"/>
</bean>
<!-- Tell Spring to not try to map things in these directories to controllers -->
<!-- Order must be set to supercede the handler configured by the mvc:annotation-driven annotation -->
<mvc:resources order="-10" location="/img/" mapping="/img/**" />
<mvc:resources order="-10" location="/css/" mapping="/css/**" />
<mvc:resources order="-10" location="/js/" mapping="/js/**" />
<mvc:resources order="-10" location="/fonts/" mapping="/fonts/**" />
<mvc:resources order="-10" location="favicon.ico" mapping="favicon.ico" />
<mvc:resources order="-10" location="robots.txt" mapping="robots.txt" />
</beans>
的applicationContext-datasource.xml
<?xml version="1.0" encoding="UTF-8"?>
<!-- The "webDS" data source is the main data source for names. It is referenced and
should be configured via JNDI in your particular environment. -->
<jee:jndi-lookup id="datasource" jndi-name="jdbc/web"/>
<bean class="org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor" />
<tx:annotation-driven transaction-manager="transactionManager" />
<context:annotation-config/>
<bean class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean" id="entityManagerFactory" >
<property name="persistenceUnitName" value="wzpu"/>
<property name="dataSource" ref="datasource" />
<property name="jpaDialect">
<bean class="org.springframework.orm.jpa.vendor.HibernateJpaDialect" />
</property>
</bean>
<bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
<property name="entityManagerFactory" ref="entityManagerFactory"/>
</bean>
<bean class="org.springframework.dao.annotation.PersistenceExceptionTranslationPostProcessor"/>
</beans>
admincontroller.java
package com.names.home;
import javax.annotation.Resource;
import javax.transaction.Transactional;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
@Controller
public class AdminController {
@Resource(name="profiledao")
protected ProfileDao profiledao;
@RequestMapping(value="/admin/insert")
@Transactional
public String insert(){
Profile pr = new Profile();
pr.setId(1);
profiledao.save(pr);
return "home";
}
}
ProfileDao.java
package com.names.home;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import org.springframework.stereotype.Repository;
@Repository
public class ProfileDao {
@PersistenceContext(unitName = "wzpu")
protected EntityManager em;
public Profile find(){
return this.em.find(Profile.class, 2);
}
public void save(Profile profile){
this.em.persist(profile);
em.flush();
}
}
Profile.java
package com.names.home;
import java.io.Serializable;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.Table;
@Entity
@Table(name = "profile")
public class Profile implements Serializable{
private static final long serialVersionUID = 1L;
@Id
@Column(name = "PROFILE_ID",nullable=false,unique=true)
protected int id;
public Profile() {
super();
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + id;
return result;
}
@Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (obj == null)
return false;
if (getClass() != obj.getClass())
return false;
Profile other = (Profile) obj;
if (id != other.id)
return false;
return true;
}
}
请帮我解决这个问题
答案 0 :(得分：1)
您的问题的根源是您使用@Transactional注释注释的bean未被包含tx:annotation-driven后处理器的上下文选中。你有几个选择。将@Transactional移动到由包含tx:annotation-driven后处理器的上下文加载的bean，或将tx:annotation-driven后处理器移动到与@Transactional bean相同的上下文中加载。
答案here是类似的情况。