Не удалось сохранить объект в JPA + Spring, No error

Question

Я пытаюсь сохранить объект в JAP + Spring, но он не вставляет данные в DB, ​​ошибка не отображается. когда я развертываю свой проект на сервере, моя таблица создается автоматически в БД и когда я вручную вставляю данные в БД и пытаюсь ее извлечь, он успешно извлекает данные из БД, но при вставке данных он не дает никаких и не вставлять его в БД. ниже мой код, пожалуйста, помогите. web.xml

<display-name>Spring MVC Application</display-name> 
    <servlet> 
     <servlet-name>HelloWeb</servlet-name> 
     <servlet-class> 
     org.springframework.web.servlet.DispatcherServlet 
     </servlet-class> 
     <init-param> 
     <param-name>contextConfigLocation</param-name> 
     <param-value>/WEB-INF/HelloWeb-servlet.xml,/WEB-INF/servlet-context.xml</param-value> 
     </init-param> 
     <load-on-startup>1</load-on-startup> 
    </servlet> 

    <servlet-mapping> 
     <servlet-name>HelloWeb</servlet-name> 
     <url-pattern>/</url-pattern> 
    </servlet-mapping> 

сервлет-context.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:mvc="http://www.springframework.org/schema/mvc" 
    xsi:schemaLocation="http://www.springframework.org/schema/beans 
     http://www.springframework.org/schema/beans/spring-beans.xsd 
     http://www.springframework.org/schema/context 
     http://www.springframework.org/schema/context/spring-context.xsd 
     http://www.springframework.org/schema/mvc 
     http://www.springframework.org/schema/mvc/spring-mvc.xsd"> 

    <context:component-scan base-package="com.demo" /> 
    <mvc:annotation-driven /> 

    <bean 
     class="org.springframework.web.servlet.view.InternalResourceViewResolver"> 
     <property name="prefix" value="/WEB-INF/jsp/" /> 
     <property name="suffix" value=".jsp" /> 
    </bean> 
</beans> 

HelloWeb-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" 
    xsi:schemaLocation="http://www.springframework.org/schema/beans 
     http://www.springframework.org/schema/beans/spring-beans.xsd 
     http://www.springframework.org/schema/context 
     http://www.springframework.org/schema/context/spring-context.xsd 
     http://www.springframework.org/schema/tx 
     http://www.springframework.org/schema/tx/spring-tx.xsd"> 

    <context:annotation-config /> 
    <bean id="dataSource" 
     class="org.springframework.jdbc.datasource.DriverManagerDataSource"> 
     <property name="driverClassName" value="com.mysql.jdbc.Driver"></property> 
     <property name="url" value="jdbc:mysql://localhost:3306/demodb"></property> 
     <property name="username" value="root"></property> 
     <property name="password" value="rahul"></property> 
    </bean> 

    <bean id="entityManagerFactory" 
     class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean"> 
     <property name="dataSource" ref="dataSource" /> 
     <property name="persistenceUnitName" value="JPA_Demo" /> 
     <property name="jpaVendorAdapter"> 
      <bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter"> 
       <property name="showSql" value="true" /> 
       <property name="generateDdl" value="true" /> 
       <property name="databasePlatform" value="org.hibernate.dialect.MySQL5Dialect" /> 
      </bean> 
     </property> 
    </bean> 

    <bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager"> 
     <property name="entityManagerFactory" ref="entityManagerFactory"></property> 
    </bean> 
    <tx:annotation-driven transaction-manager="transactionManager" />  
</beans> 

persistence.xml

<?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="JPA_Demo" transaction-type="RESOURCE_LOCAL"> 
     <class>com.data.entity.Employee</class> 

     <properties> 
     <property name="javax.persistence.jdbc.url" value="jdbc:mysql://localhost:3306/demodb"/> 
     <property name="javax.persistence.jdbc.user" value="root"/> 
     <property name="javax.persistence.jdbc.password" value="rahul"/> 
     <property name="javax.persistence.jdbc.driver" value="com.mysql.jdbc.Driver"/> 
     <property name="eclipselink.logging.level" value="FINE"/> 
     <property name="eclipselink.ddl-generation" value="create-tables"/> 
     </properties> 

    </persistence-unit> 
</persistence> 

EmployeeRESTController.java

@Controller 
public class EmployeeRESTController { 

    @Autowired 
    private CreateEmployeeDao createEmployeeDao;  

    @RequestMapping(value = "/employee/create") 
    public @ResponseBody String getCreateEmployees() { 
     this.createEmployeeDao.createEmployee(); 
     return "Success"; 
    } 

    @RequestMapping(value = "/employee/get") 
    public @ResponseBody Employee getGetEmployees() { 
     return this.createEmployeeDao.findEmployeeBySalary(40000); 
    } 
} 

CreateEmployeeDao.java

@Repository 
@Transactional(value = "transactionManager", propagation = Propagation.REQUIRED) 
public class CreateEmployeeDao { 

    @PersistenceContext(name = "entityManagerFactory", unitName = "JPA_Demo") 
    private EntityManager em; 

    public void createEmployee() {    
     Employee employee = new Employee(); 
     // employee.setEid(1290); 
     employee.setEname("Gopal"); 
     employee.setSalary(40000); 
     employee.setDeg("Technical Manager");    
     em.persist(employee);  
     // em.flush(); 
    } 

    public Employee findEmployeeBySalary(double salary) { 
     Query q = em.createNamedQuery("find employee by salary");   
     q.setParameter("salary", salary);   
     return (Employee) q.getSingleResult(); 
    } 
} 

Employee.java

@Entity 
@Table 
@NamedQueries({ 
     @NamedQuery(query = "Select e from Employee e where e.eid = :id", name = "find employee by id"), 
     @NamedQuery(query = "Select e from Employee e where e.salary = :salary", name = "find employee by salary") }) 
public class Employee { 

    @Id 
    @GeneratedValue(strategy = GenerationType.AUTO) 
    private int eid; 
    private String ename; 
    private double salary; 
    private String deg; 

    public Employee(int eid, String ename, double salary, String deg) { 
     super(); 
     this.eid = eid; 
     this.ename = ename; 
     this.salary = salary; 
     this.deg = deg; 
    } 

    public Employee() { 
     super(); 
    } 

    public int getEid() { 
     return eid; 
    } 

    public void setEid(int eid) { 
     this.eid = eid; 
    } 

    public String getEname() { 
     return ename; 
    } 

    public void setEname(String ename) { 
     this.ename = ename; 
    } 

    public double getSalary() { 
     return salary; 
    } 

    public void setSalary(double salary) { 
     this.salary = salary; 
    } 

    public String getDeg() { 
     return deg; 
    } 

    public void setDeg(String deg) { 
     this.deg = deg; 
    } 
} 

ниже мой журнал сервер, когда я ударил запрос для вставки данных

11:31:57,315 DEBUG [org.springframework.web.servlet.DispatcherServlet] (http-/0.0.0.0:8080-1) DispatcherServlet with name 'HelloWeb' processing GET request for [/springrestexample/employee/create] 
11:31:57,398 DEBUG [org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping] (http-/0.0.0.0:8080-1) Looking up handler method for path /employee/create 
11:31:57,473 DEBUG [org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping] (http-/0.0.0.0:8080-1) Returning handler method [public java.lang.String com.demo.controller.EmployeeRESTController.getCreateEmployees()] 
11:31:57,562 DEBUG [org.springframework.beans.factory.support.DefaultListableBeanFactory] (http-/0.0.0.0:8080-1) Returning cached instance of singleton bean 'employeeRESTController' 
11:31:57,566 DEBUG [org.springframework.web.servlet.DispatcherServlet] (http-/0.0.0.0:8080-1) Last-Modified value for [/springrestexample/employee/create] is: -1 
11:31:57,952 DEBUG [org.springframework.orm.jpa.SharedEntityManagerCreator$SharedEntityManagerInvocationHandler] (http-/0.0.0.0:8080-1) Creating new EntityManager for shared EntityManager invocation 
11:31:58,063 DEBUG [org.hibernate.impl.SessionImpl] (http-/0.0.0.0:8080-1) opened session at timestamp: 14495545180 
11:31:58,180 DEBUG [org.hibernate.event.def.AbstractSaveEventListener] (http-/0.0.0.0:8080-1) delaying identity-insert due to no transaction in progress 
11:31:58,205 DEBUG [org.springframework.orm.jpa.EntityManagerFactoryUtils] (http-/0.0.0.0:8080-1) Closing JPA EntityManager 
11:32:01,225 DEBUG [org.springframework.web.servlet.mvc.method.annotation.RequestResponseBodyMethodProcessor] (http-/0.0.0.0:8080-1) Written [Success] as "text/html" using [org.springframework.http.converter.StringHttpMessageConverter@1d971ca] 
11:32:01,235 DEBUG [org.springframework.web.servlet.DispatcherServlet] (http-/0.0.0.0:8080-1) Null ModelAndView returned to DispatcherServlet with name 'HelloWeb': assuming HandlerAdapter completed request handling 
11:32:01,239 DEBUG [org.springframework.web.servlet.DispatcherServlet] (http-/0.0.0.0:8080-1) Successfully completed request 

задерживающих идентификационной-вставку из-за отсутствие сделки в ходе это сервер печать строки при вставке данных в БД. Пожалуйста, помогите мне определить решение этой проблемы.

Answer 1

как об использовании транзакций

em.getTransaction().begin(); 
.. 
em..getTransaction().commit(); 

или

аннотировать createEmployee() метод с @Transactional который позволяет пружинные транзакции.

Answer 2

1) Вы можете удалить аннотацию @Autowired на приватной CreateEmployeeDao createEmployeeDao и вручную ввести ее.