使用Hibernate更新表

Question

I am working under a project that is update the data's in MySQL table using Hibernate. Whenever I run the project, the exception is shown as below.

[Batch update returned unexpected row count from update [0]; actual row count: 0; expected: 1]

Controller

@RequestMapping(value = "/disableEmployeeMaster", method = RequestMethod.POST)
public @ResponseBody void disableEmployee(HttpServletRequest request)
{
    EmployeeMaster employeeMaster = new EmployeeMaster();
    try
    {
        String employeeId = request.getParameter("employeeId");
        employeeMaster.setIsDel("Y");
        mainService.disableEmployee(employeeId , employeeMaster);
    }
    catch(Exception e)
    {
        logger.error(e.getMessage());
    }
}

Service Implementation

@Override
public void disableEmployee(String Id, EmployeeMaster employeeMaster) {
    Session session = null;
    Transaction transaction = null;
    try
    {
        session = sessionFactory.openSession();
        transaction = session.beginTransaction();
        session.update(Id, employeeMaster);
        transaction.commit();
    }
    catch(Exception e)
    {
        System.out.println(e.getMessage());
    }
    finally
    {
        session.close();
    }
}

Answer 1

You have't set employeeId to EmployeeMaster class object. to update any entity needs it's primary key. You can refer following code :

employeeMaster.setEmployeeId(employeeId);

Controller

 @RequestMapping(value = "/disableEmployeeMaster", method = RequestMethod.POST) public @ResponseBody void disableEmployee(HttpServletRequest request) { EmployeeMaster employeeMaster = new EmployeeMaster(); try { String employeeId = request.getParameter("employeeId"); employeeMaster.setEmployeeId(employeeId); employeeMaster.setIsDel("Y"); mainService.disableEmployee(employeeId , employeeMaster); } catch(Exception e) { logger.error(e.getMessage()); } }