@Transactional注释不起作用.数据库行未创建

以下是我的所有代码.未创建数据库行.没有异常抛出.

package com.rishi.app.models;

import java.util.Collection;

import javax.management.Query;
import javax.persistence.Entity;
import javax.persistence.EntityManager;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.PersistenceContext;
import javax.persistence.PersistenceUnit;
import javax.persistence.TypedQuery;

@Entity
public class Customer {

    @Id
    @GeneratedValue(strategy=GenerationType.AUTO)
    private int id;
    private String firstName;
    private String lastName;

    protected Customer() {}

    public Customer(String firstName, String lastName) {
        this.firstName = firstName;
        this.lastName = lastName;
    }

    @Override
    public String toString() {
        return String.format(
                "Customer[id=%d, firstName='%s', lastName='%s']",
                id, firstName, lastName);
    }

}


package com.rishi.app.repositories;

import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import javax.transaction.Transactional;

import org.springframework.stereotype.Repository;

import com.rishi.app.models.Customer;

@Repository
public class CustomerRepository {
    @PersistenceContext
    private EntityManager em;

    @Transactional
    public void save(Customer c) {
        em.persist(c);
    }
}

package com.rishi.app.controllers;

import java.text.DateFormat;
import java.util.Date;
import java.util.Locale;

import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.PersistenceContext;
import javax.transaction.Transactional;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

import com.rishi.app.models.Customer;
import com.rishi.app.repositories.CustomerRepository;

/**
 * Handles requests for the application home page.
 */
@Controller
public class HomeController {
    @PersistenceContext
    EntityManager entityManager;


    @Autowired
    EntityManagerFactory entityManagerFactory;

    @Autowired
    CustomerRepository customerRepository;

    private static final Logger logger = LoggerFactory.getLogger(HomeController.class);

    /**
     * Simply selects the home view to render by returning its name.
     * @throws Exception 
     */
    @Transactional
    @RequestMapping(value = "/", method = RequestMethod.GET)
    public String home(Locale locale, Model model) {
        logger.info("Welcome home controller! The client locale is {}.", locale);

        Customer c = new Customer("Rishi", "Paranjape");
        customerRepository.save(c);

            //Following 4 lines work just fine. Database row is actually created.
        //EntityManager em = entityManagerFactory.createEntityManager();
        //em.getTransaction().begin();
        //em.persist(c);
        //em.getTransaction().commit();

        Date date = new Date();
        DateFormat dateFormat = DateFormat.getDateTimeInstance(DateFormat.LONG, DateFormat.LONG, locale);

        String formattedDate = dateFormat.format(date);

        model.addAttribute("serverTime", formattedDate );
        //throw new Exception("bad stuff");
        return "home";
    }

}

我的servlet上下文xml:

    

    
    

    
    

    
    
        
        
    

    


    
      
      
      
         
      
      
         
            validate
            org.hibernate.dialect.MySQL5Dialect
         
      
   

   
      
      
      
      
   

    
      
   
   

我有根上下文和servlet上下文.我的所有bean都在servlet上下文中(我的根上下文几乎为空).我的主要问题是em.persist()被调用但什么也没做.如果我调试应用程序,我可以看到来自CustomerRepository的save方法被调用.没有任何异常抛出或错误显示.但是,没有创建数据库行.