rest webservice - DAO层和webservice集成，sessionfactory null异常

我们用mvc开发一个项目用Java。我们想为我们的项目添加一个休息Web服务，但是当我们想访问DAO层时，我们得到的sessionFactory是空的异常。我们如何在Web服务上注入DAO？rest webservice - DAO层和webservice集成，sessionfactory null异常

你可以看到下面

Web.java代码 - Web服务代码

package tr.com.server.webservice; 

import java.util.ArrayList; 

import javax.ws.rs.GET; 
import javax.ws.rs.Path; 
import javax.ws.rs.Produces; 
import javax.ws.rs.core.MediaType; 

import org.springframework.beans.factory.annotation.Autowired; 
import org.springframework.transaction.annotation.Transactional; 

import tr.com.server.model.Admin; 
import tr.com.server.persistance.admin.AdminDAO; 

@Path("/rota") 
public class Web{ 
    @Autowired 
    @GET 
    @Produces(MediaType.TEXT_PLAIN) 
    @Path("/add") 
    @Transactional 
    public String adminadd() throws Exception{ 

     Admin m = new Admin(); 
     m.setAdminname("John"); 
     m.setAdminpass("123456"); 
     AdminDAO a = new AdminDAO(); 
     a.add(m); 

     return "added"; 
    } 
}

AdminDAO.java - DAO类

package tr.com.server.persistance.admin; 

import java.util.List; 

import org.hibernate.Criteria; 
import org.hibernate.SessionFactory; 
import org.hibernate.criterion.Order; 

import org.springframework.beans.factory.annotation.Autowired; 
import org.springframework.stereotype.Repository; 
import org.springframework.transaction.annotation.Transactional; 

import tr.com.server.model.Admin; 


@Repository 
public class AdminDAO implements IAdminDAO { 

    @Autowired 
    private SessionFactory sessionFactory; 

    public SessionFactory getSessionFactory() { 
     return sessionFactory; 
    } 

    @Autowired 
    public void setSessionFactory(SessionFactory sessionFactory) { 
     this.sessionFactory = sessionFactory; 
    } 

    @Autowired 
    @Transactional 
    @Override 
    public Admin add(Admin entity) throws Exception { 
     try { 

      getSessionFactory().getCurrentSession().save(entity); 
      getSessionFactory().getCurrentSession().flush(); 
      getSessionFactory().getCurrentSession().refresh(entity); 
      return entity; 
     } catch (RuntimeException e) { 

      throw new Exception(e); 
     } 
    } 
}

iAdminDAO.java - AdminDAO接口

package tr.com.server.persistance.admin; 

import java.util.List; 

import org.springframework.transaction.annotation.Transactional; 

import tr.com.server.model.Admin; 

@Transactional 
public interface IAdminDAO { 

    Admin add(Admin entity) throws Exception; 

}

/WEB-INF/xml/admin.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" xmlns:aop="http://www.springframework.org/schema/aop" 
    xsi:schemaLocation="http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd 
     http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd 
     http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd 
     http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd"> 


    <bean id="iAdminBusinessManager" class="tr.com.server.business.admin.AdminBusinessManager"> 
    <property name="iAdminDAO" ref="iAdminDAO"></property> 
    </bean> 

    <bean id="iAdminDAO" class="tr.com.server.persistance.admin.AdminDAO"> 
    <property name="sessionFactory" ref="sessionFactory"></property> 
    </bean>  

</beans>

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" 
    id="WebApp_ID" version="2.5"> 
    <display-name>Index</display-name> 
    <welcome-file-list> 
     <welcome-file>index.html</welcome-file> 
    </welcome-file-list> 
    <context-param> 
     <param-name>contextConfigLocation</param-name> 
     <param-value>WEB-INF/application-config.xml</param-value> 
    </context-param> 

    <listener> 
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> 
    </listener> 

    <listener> 
    <listener-class>org.springframework.security.web.session.HttpSessionEventPublisher</listener-class> 
    </listener> 

    <servlet> 
     <servlet-name>springapp</servlet-name> 
     <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> 
     <load-on-startup>1</load-on-startup> 
    </servlet> 
    <servlet-mapping> 
     <servlet-name>springapp</servlet-name> 
     <url-pattern>*.htm</url-pattern> 
    </servlet-mapping> 
    <filter> 
     <filter-name>hibernateFilter</filter-name> 
     <filter-class>org.springframework.orm.hibernate3.support.OpenSessionInViewFilter</filter-class> 
     <init-param> 
      <param-name>singleSession</param-name> 
      <param-value>false</param-value> 
     </init-param> 
     <init-param> 
      <param-name>sessionFactoryBeanName</param-name> 
      <param-value>sessionFactory</param-value> 
     </init-param> 
    </filter> 
    <filter-mapping> 
     <filter-name>hibernateFilter</filter-name> 
     <url-pattern>/*</url-pattern> 
    </filter-mapping> 

    <session-config> 
     <session-timeout>45</session-timeout> 
    </session-config> 

    <servlet> 
     <servlet-name>Jersey REST Service</servlet-name> 
     <servlet-class>com.sun.jersey.spi.container.servlet.ServletContainer</servlet-class> 
     <init-param> 
      <param-name>com.sun.jersey.config.property.packages</param-name> 
      <param-value>tr.com.server.webservice</param-value> 
     </init-param> 
     <init-param> 
      <param-name>com.sun.jersey.api.json.POJOMappingFeature</param-name> 
      <param-value>true</param-value> 
     </init-param> 
     <load-on-startup>1</load-on-startup> 
    </servlet> 
    <servlet-mapping> 
     <servlet-name>Jersey REST Service</servlet-name> 
     <url-pattern>/rest/*</url-pattern> 
    </servlet-mapping> 
</web-app>

休眠-config.xml中

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

    <!-- HIBERNATE CONFIGURATION START POINT --> 

    <bean id="sessionFactory" 
     class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean" > 
     <property name="packagesToScan" value="tr.com.server.model" /> 
     <property name="hibernateProperties"> 
      <props> 
       <prop key="hibernate.connection.pool_size">10</prop> 
       <prop key="hibernate.show_sql">true</prop> 
       <prop key="hibernate.connection.release_mode">auto</prop> 
       <prop key="hibernate.connection.characterEncoding">utf-8</prop> 

       <!--HSQL --> 
       <prop key="hibernate.connection.datasource">db2pool</prop> 
       <prop key="hibernate.transaction.factory_class">org.hibernate.transaction.JTATransactionFactory 
       </prop> 
       <prop key="hibernate.dialect">org.hibernate.dialect.DB2Dialect</prop> 
      </props> 
     </property> 
    </bean> 

    <!-- HIBERNATE CONFIGURATION END POINT --> 

</beans>

springapp-servlet.xml中

<?xml version="1.0" encoding="UTF-8"?> 

<beans xmlns="http://www.springframework.org/schema/beans" 
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
     xsi:schemaLocation="http://www.springframework.org/schema/beans 
     http://www.springframework.org/schema/beans/spring-beans-2.5.xsd"> 

</beans>

application-config.xml

两

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

    <import resource="hibernate-config.xml" /> 

    <context:annotation-config /> 
    <tx:annotation-driven transaction-manager="transactionManager" /> 
    <aop:aspectj-autoproxy proxy-target-class="true" /> 
    <context:component-scan base-package="tr.com.server.webservice" /> 

    <import resource="xml/admin.xml" /> 

    <bean id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager"> 
     <property name="sessionFactory" ref="sessionFactory" /> 
    </bean> 

</beans>

来源

2013-04-21 gumust

两件事情我张贴的代码注意到：

AdminDAO一个=新AdminDAO（）;不是通过春季工厂实例化的。所以依赖的spring bean（包括会话工厂）将不会被连线。从Spring上下文查找或自动布线获取AdminDAO bean。
@交易注释不会通过接口实现或子类传播。也用@Transactional注释每个DAO类。

来源

2013-04-21 21:52:50 maggu

我试过你的解决方案，但没有奏效。我认为我们的问题是关于我们的XML定义。你有没有注意到xml配置中缺少的东西？谢谢。 – gumust 2013-04-22 17:23:36

rest webservice - DAO层和webservice集成，sessionfactory null异常

回答

相关问题