休眠和春季MVC更新不起作用

Question

我无法在编辑后更新表，因为当我调试并呈现DAO文件中的所有值时它工作正常，但在dao实施后，它未在用户列表中显示相同值的更新值。 我特此附上我的代码：

JSP文件：

<form:form id="editForm" modelAttribute="user" action="update">
<div style="width: 400px; padding: 10px; border: 5px solid gray; margin: 0px;">
<table width="400px" height="150px">

<tr><td><font face="Arial">First Name:</font></td>
<td><input name="licenseNumber" value="${model.user.firstName}"></td></tr>
<tr><td><font face="Arial">Last Name:</font></td>
<td><input name="licenseNumber" value="${model.user.lastName}"></td></tr>

<tr><td><font face="Arial">Gender:</font></td>
<td><input name="licenseNumber" value="${model.user.gender}"></td></tr>
<tr><td><font face="Arial">City Name:</font></td>
<td><input name="licenseNumber" value="${model.user.city}"></td></tr>

<tr><td></td><td>
<input type="submit" value="Edit" />
<br>
<a href="userList.html" >Cancel</a>
</td></tr>
</table>
</div>
</form:form>

道方法：

@Override
public void updateUser (User user)
{
    /*Transaction tx = session.beginTransaction();*/

    sessionfactory.getCurrentSession().merge(user);
}

服务等级

@Service
@Transactional(propagation = Propagation.SUPPORTS, readOnly = true)
public class UserServiceImpl implements UserService {

    @Autowired
    UserDao userDao;

    @Override
    public void addUser(User user) 
    {
        userDao.saveUser(user);
    }

    @Override
    public List<User> getUser() 
    {
        return userDao.getUser();
    }

    @Override
    public User getUser(int id) 
    {
        return userDao.getUser(id);
    }

    @Override
    public void updateUser(User user)
    {
        userDao.updateUser(user);
    }
}

控制器类

@RequestMapping(value = "/edit", method = RequestMethod.GET)  
public ModelAndView editUserData(@ModelAttribute("user") User user,  
   BindingResult result) {  
  Map<String, Object> model = new HashMap<String, Object>();  
  model.put("user", userService.getUser(user.getId()));  
  return new ModelAndView("Edit","model",model);
 } 

@RequestMapping(value = "/update", method = RequestMethod.POST)  
public ModelAndView updateUserData(@ModelAttribute("user") User user,  
   BindingResult result,SessionStatus status) {  
   userService.updateUser(user);
   status.setComplete();
   return new ModelAndView("redirect:/userList.html");
 } 

Answer 1

尝试

1. 更改通过更新 合并

   sessionFactory.getCurrentSession（）。update（user）;

2. 如果1不起作用，请尝试：

   sessionfactory.getCurrentSession（）。merge（user）; sessionFactory.getCurrentSession（）。update（user）;

Answer 2

您将所有@Transactional方法设置为readOnly =“ true”。 您应该覆盖所有在数据库中进行更改的方法。

@Service
@Transactional(propagation = Propagation.SUPPORTS, readOnly = true)
public class UserServiceImpl implements UserService {

    @Autowired
    UserDao userDao;

    @Override
    @Transactional(propagation = Propagation.SUPPORTS, readOnly = false)
    public void addUser(User user) 
    {
        userDao.saveUser(user);
    }

    @Override
    public List<User> getUser() 
    {
        return userDao.getUser();
    }

    @Override
    public User getUser(int id) 
    {
        return userDao.getUser(id);
    }

    @Override
    @Transactional(propagation = Propagation.SUPPORTS, readOnly = false)
    public void updateUser(User user)
    {
        userDao.updateUser(user);
    }
}