Spring 休眠安全错误-未找到当前线程的会话

我正在尝试使用用户名和密码对用户进行身份验证，但键入用户详细信息后，错误页面出现错误：

  Your login attempt was not successful, try again.

  Reason: No Session found for current thread

Servlet

   <?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"
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/tx http://www.springframework.org

     /schema/tx/spring-tx.xsd
    http://www.springframework.org/schema/context     

     http://www.springframework.org/schema/context/spring-context.xsd">

<!-- 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>

<context:component-scan base-package="com.myproject.app" />

<!-- Activates various annotations to be detected in bean classes -->
<context:annotation-config />
<tx:annotation-driven transaction-manager="transactionManager" ></tx:annotation-

   driven>


  </beans:beans>

服务

   @Service("customUserDetailsService")
    public class CustomUserDetailsService implements UserDetailsService{

@Autowired
private UserEntityDAO userEntityDAO;

@Autowired
private Assembler assembler;

@Override
@Transactional(readOnly = true)
public UserDetails loadUserByUsername(String username)
        throws UsernameNotFoundException {
    // TODO Auto-generated method stub
    UserDetails userDetails = null;

    UserEntity userEntity = userEntityDAO.getUserByName(username);

    if (userEntity == null)

    throw new UsernameNotFoundException("user not found");

    return assembler.buildUserFromUser(userEntity);


  }}

---

我想知道为什么找不到会话

您的DAO实例是三倍的—创建了两个实例（在AutoSCANK和另一个显式bean声明的不同上下文中）考虑将您的服务和TX管理器移到根Web应用程序上下文，并使用该类是“代码> UserEntityDAO < /COD>不<代码> UserDaoImpl <代码>，这在问题中显示。谢谢，这就是问题所在。

  @Repository
  @Transactional
  public class UserDAOImpl implements UserDAO{

@Autowired
private SessionFactory sessionFactory;

   @Override
@Transactional
public User getUserByName(String username) {
    // TODO Auto-generated method stub
    User user = (User) sessionFactory.getCurrentSession().createQuery(

            "select u from UserEntity u where u.username = '' + 

      username + ''").uniqueResult();

            return user;
}

   @Service("customUserDetailsService")
    public class CustomUserDetailsService implements UserDetailsService{

@Autowired
private UserEntityDAO userEntityDAO;

@Autowired
private Assembler assembler;

@Override
@Transactional(readOnly = true)
public UserDetails loadUserByUsername(String username)
        throws UsernameNotFoundException {
    // TODO Auto-generated method stub
    UserDetails userDetails = null;

    UserEntity userEntity = userEntityDAO.getUserByName(username);

    if (userEntity == null)

    throw new UsernameNotFoundException("user not found");

    return assembler.buildUserFromUser(userEntity);


  }}