就像在主题中一样，但是如果我只使用unitName在META-INF中执行persistence.xml文件，并按此执行，那么一切都很好，我的sql查询正在运行，并且连接已打开。 以下是我对项目的看法：
这是我调用方法的代码，我的HomeController.java：
@Controller
@RequestMapping("/")
@SessionAttributes("/")
public class HomeController {
@Autowired
private UserDao userDao;
@Autowired
private EmployeeDAO employeeDao;
@RequestMapping(value = {"/dam"}, method = RequestMethod.GET)
public String setupForm(Model model)
{
userDao.getUserByUserId("2");
//employeeDao.getAllEmployees();
return "listEmployeeView";
}
}
这是UserDao.java：
@Repository
@Transactional
public class UserDao {
@PersistenceContext
private EntityManager entityManager;
public UserModel getUserByUserId(String userId) {
UserModel user = null;
//EntityManagerFactory emf = Persistence.createEntityManagerFactory("movie-unit");
//entityManager = emf.createEntityManager();
CriteriaBuilder cb = entityManager.getCriteriaBuilder();
CriteriaQuery<UserModel> cq = cb.createQuery(UserModel.class);
Root<User> userRoot = cq.from(User.class);
cq.multiselect(
userRoot.get("firstName"),
userRoot.get("middleName"),
userRoot.get("lastName"),
userRoot.get("email"),
userRoot.get("userId"),
userRoot.get("password")
);
cq.where(cb.equal(userRoot.get("userId"), userId));
TypedQuery<UserModel> q = entityManager.createQuery(cq);
user = q.getSingleResult();
System.out.print(user.getUserId()+"&"+user.getPassword());
return user;
}
}
这是web.xml：
<web-app id="WebApp_ID" version="2.4"
xmlns="http://java.sun.com/xml/ns/j2ee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee
http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
<display-name>Spring Hibernate JPA Hello World Application</display-name>
<!-- Configuration file for the root application context -->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>
/WEB-INF/spring-servlet.xml
</param-value>
</context-param>
<!-- Configuration for the DispatcherServlet -->
<servlet>
<servlet-name>spring</servlet-name>
<servlet-class>
org.springframework.web.servlet.DispatcherServlet
</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>spring</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
这是spring-servlet.xml：
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.2.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd">
<!-- It register the beans in context and scan the annotations inside beans and activate them -->
<context:component-scan base-package="com.howtodoinjava.demo" />
<!-- This allow for dispatching requests to Controllers by registering
two beans - DefaultAnnotationHandlerMapping and AnnotationMethodHandlerAdapter -->
<mvc:annotation-driven />
<!-- This helps in mapping the logical view names to directly view files under a certain pre-configured directory -->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/views/" />
<property name="suffix" value=".jsp" />
</bean>
<!-- This resolves messages from resource bundles for different locales -->
<bean id="messageSource" class="org.springframework.context.support.ResourceBundleMessageSource">
<property name="basename" value="messages" />
</bean>
<!-- To validate the posted add employee form -->
<bean id="employeeValidator" class="com.howtodoinjava.demo.validator.EmployeeValidator" />
<!-- This produces a container-managed EntityManagerFactory;
rather than application-managed EntityManagerFactory as in case of LocalEntityManagerFactoryBean-->
<bean id="entityManagerFactoryBean" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
<property name="dataSource" ref="dataSource" />
<!-- This makes /META-INF/persistence.xml is no longer necessary -->
<property name="packagesToScan" value="com.howtodoinjava.demo.model" />
<!-- JpaVendorAdapter implementation for Hibernate EntityManager.
Exposes Hibernate's persistence provider and EntityManager extension interface -->
<property name="jpaVendorAdapter">
<bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter" />
</property>
<property name="jpaProperties">
<props>
<prop key="hibernate.hbm2ddl.auto">validate</prop>
<prop key="hibernate.dialect">org.hibernate.dialect.MySQL5Dialect</prop>
</props>
</property>
</bean>
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="com.mysql.jdbc.Driver" />
<property name="url" value="jdbc:mysql://localhost:3306/baza" />
<property name="username" value="root" />
<property name="password" value="root" />
</bean>
<!-- This transaction manager is appropriate for applications that use a single JPA EntityManagerFactory for transactional data access.
JTA (usually through JtaTransactionManager) is necessary for accessing multiple transactional resources within the same transaction. -->
<bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
<property name="entityManagerFactory" ref="entityManagerFactoryBean" />
</bean>
<!-- responsible for registering the necessary Spring components that power annotation-driven transaction management;
such as when @Transactional methods are invoked -->
<tx:annotation-driven />
</beans>
就像我说的那样，如果我在java代码中执行entitymanager和entitymanagerfactory，在UserDao.java中使用persistence.xml这样评论：
<?xml version="1.0" encoding="UTF-8"?>
<persistence 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"
version="2.0">
<persistence-unit name="movie-unit">
<provider>org.hibernate.ejb.HibernatePersistence</provider>
<properties>
<property name="hibernate.connection.url" value="jdbc:mysql://localhost/baza" />
<property name="hibernate.connection.driver_class" value="com.mysql.jdbc.Driver" />
<property name="hibernate.connection.username" value="root" />
<property name="hibernate.archive.autodetection" value="class" />
<property name="hibernate.show_sql" value="true" />
<property name="hibernate.format_sql" value="true" />
<property name="hbm2ddl.auto" value="update" />
</properties>
</persistence-unit>
一切都很好。
在mysql服务器中我有这样的权限：
任何％ - USAGE
任何本地主机没有密码USAGE
root 127.0.0.1无密码ALL PRIVILEGES
root :: 1无密码ALL PRIVILEGES
root localhost，密码为ALL PRIVILEGES
哪里有问题？