1
以下是我的所有代碼。數據庫行未被創建。拋出異常。@交易註釋不起作用。數據庫行未創建
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上下文的xml：
<?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-3.1.xsd
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.1.xsd">
<!-- DispatcherServlet Context: defines this servlet's request-processing infrastructure -->
<!-- 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.rishi.app" />
<beans:bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
<beans:property name="dataSource" ref="dataSource" />
<beans:property name="packagesToScan" value="com.rishi.app.models" />
<beans:property name="jpaVendorAdapter">
<beans:bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter" />
</beans:property>
<beans:property name="jpaProperties">
<beans:props>
<beans:prop key="hibernate.hbm2ddl.auto">validate</beans:prop>
<beans:prop key="hibernate.dialect">org.hibernate.dialect.MySQL5Dialect</beans:prop>
</beans:props>
</beans:property>
</beans:bean>
<beans:bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<beans:property name="driverClassName" value="com.mysql.jdbc.Driver" />
<beans:property name="url" value="jdbc:mysql://localhost:3306/spring" />
<beans:property name="username" value="rishi" />
<beans:property name="password" value="password" />
</beans:bean>
<beans:bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
<beans:property name="entityManagerFactory" ref="entityManagerFactory" />
</beans:bean>
<tx:annotation-driven mode="aspectj" transaction-manager="transactionManager" />
</beans:beans>
我有根上下文和servlet上下文。我所有的bean都在servlet上下文中（我的根上下文幾乎是空的）。我的主要問題是em.persist（）被調用，但什麼都不做。如果我調試應用程序，我可以看到被稱爲CustomerRepository的保存方法。沒有任何異常拋出或顯示任何錯誤。但是，沒有創建數據庫行。
你可以發佈你的web.xml嗎？ –
好的類，但我想你也陷入了重複組件掃描的陷阱，這會導致你的'CustomerRepository'的代理和非代理實例都基本上呈現所有的AOP（包括事務）無用。 –
用你的根和servlet上下文配置文件，我們都猜測。請張貼他們。 – MarkOfHall