数据没有插入到数据库 [英] Data not inserted to db

问题描述

我试图使用Spring，Hibernate，JPA插入数据到我的数据库。但是当我尝试插入数据时，它不会给出任何错误。但数据还没有插入。任何想法？

I am trying to insert data to my db using Spring,Hibernate,JPA .But when I try to insert data it does not give any errors. But data has not been inserted as well. Any ideas ?

我的persistence.xml

MY persistence.xml

<?xml version="1.0" encoding="UTF-8"?>
<persistence version="2.0" xmlns="http://java.sun.com/xml/ns/persistence"
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 xsi:schemaLocation="http://java.sun.com/xml/ns/persistence 
 http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd">

  <persistence-unit name="GuestbookPU" transaction-type="RESOURCE_LOCAL">
  <provider>org.hibernate.ejb.HibernatePersistence</provider>
  <class>com.sanja.test.myDao.entity.User</class>


    <properties>
             <property name="hibernate.connection.driver_class" value="com.mysql.jdbc.Driver"/>
            <property name="hibernate.connection.password" value="welcome"/>
            <property name="hibernate.connection.url" value="jdbc:mysql://localhost:3306/sanjaya"/>
            <property name="hibernate.connection.username" value="root"/>
    </properties>
  </persistence-unit>

</persistence>

服务项目中的bean声明（spring_service.xml）

bean declaration in service project(spring_service.xml)

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:tx="http://www.springframework.org/schema/tx" xmlns:p="http://www.springframework.org/schema/p"
    xsi:schemaLocation="
        http://www.springframework.org/schema/beans     
        http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
        http://www.springframework.org/schema/context 
        http://www.springframework.org/schema/context/spring-context-3.2.xsd
        http://www.springframework.org/schema/tx
        http://www.springframework.org/schema/tx/spring-tx-3.0.xsd

">

    <import  resource="classpath:spring_dao.xml"/>
    <bean id="app" class="com.sanja.test.myService.App"/>
        <bean id="entityManagerFactory"
        class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean"
         p:persistenceUnitName="GuestbookPU"/>

</beans>

dao项目中的bean声明（spring_dao.xml）

bean declaration in dao project(spring_dao.xml)

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:oxm="http://www.springframework.org/schema/oxm" xmlns:p="http://www.springframework.org/schema/p"
    xsi:schemaLocation="
        http://www.springframework.org/schema/beans     
        http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
        http://www.springframework.org/schema/context 
        http://www.springframework.org/schema/context/spring-context-3.2.xsd

">
    <context:component-scan base-package="com.sanja.test.myDao" />
    <context:annotation-config />


</beans>

我的实体

@Entity
public class User {

@Id
@GeneratedValue(strategy=GenerationType.AUTO)
Long id;
String name;


public Long getId() {
    return id;
}
public void setId(Long id) {
    this.id = id;
}
public String getName() {
    return name;
}
public void setName(String name) {
    this.name = name;
}

}

My Test class

My Test class

public class App 
{
    @Autowired
    UserDao userDao;

    public static void main( String[] args )
    {
        ApplicationContext context = new ClassPathXmlApplicationContext("spring_service.xml");
        App app=(App)context.getBean("app");
        app.addUser();
    }

    @Transactional(propagation = Propagation.SUPPORTS)
    public void addUser(){

         User user=new User();
         user.setName("Sanja ela");
         userDao.save(user);
             System.out.println("elane");

    }
}

我的Dao逻辑

@Repository("userDao")
public class UserDaoImpl implements UserDao {

    @PersistenceContext
    EntityManager entityManager;

     public User save(User user){

        entityManager.persist(user);
        return user;

    }


}

我发布了每一个代码。

I posted each and every code.

推荐答案

您正在使用 Propagation.SUPPORTS 。如果事务不存在，操作将不是事务性的（参见 javadoc for Propagation.SUPPORTS ）。
$ b

You are using Propagation.SUPPORTS. If the transaction do not exists, the operation will be non transactional (see javadoc for Propagation.SUPPORTS).

支持当前事务，执行非 -

Support a current transaction, execute non-transactionally if none exists.

请尝试使用 Propagation.REQUIRED （ javadoc for Propagation。要求）;

Give it a try using Propagation.REQUIRED(javadoc for Propagation.REQUIRED);

支持当前交易，如果不存在，请创建一个新交易。

Support a current transaction, create a new one if none exists.

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