Я пытаюсь создать веб-приложение на основе структуры MVC и Hibernate JPA.
Я хочу сохранить форму данных в базе данных.для этой работы я получаю данные в servlet и вызываю метод в personManager классе в business logic "bl" пакете.
этот метод больше всего получает данные и сохраняет их, но представляет эту ошибку:
10-Dec-2018 11:15:07.463 SEVERE [http-nio-8080-exec-5] org.apache.catalina.core.StandardWrapperValve.invoke Servlet.service() for servlet [manager] in context with path [] threw exception [Servlet execution threw an exception] with root cause
java.lang.ClassNotFoundException: javax.persistence.Persistence
at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1309)
at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1137)
at util.JPAProvider.<clinit>(JPAProvider.java:13)
at model.bl.PersonManager.<init>(PersonManager.java:24)
at controller.Manager.service(Manager.java:81)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:742)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:493)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:650)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342)
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:800)
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:806)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1498)
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Unknown Source)
класс сервлета:
public void service (HttpServletRequest request , HttpServletResponse response)throws IOException, ServletException
{
String username= request.getParameter("choose-username");
String password= request.getParameter("choose-password");
String repeatPass= request.getParameter("repeat-password");
String email = request.getParameter("email");
HttpSession session = request.getSession();
try {
PersonManager personManager = new PersonManager();
personManager.addUser(username , password , email , "female");
response.sendRedirect("/views/welcome.jsp");
} catch (Exception e)
{
request.getRequestDispatcher("/views/register.jsp").forward(request, response);
}
}
Класс JPAProvider:
public class JPAProvider {
private static final EntityManagerFactory entityManagerFactory;//instate of session for connect to database
static{
entityManagerFactory = Persistence.createEntityManagerFactory("MyConnection");
}
public static EntityManagerFactory getEntityManagerFactory() {
return entityManagerFactory;
}
}
открытый класс PersonManager {
EntityManager entityManager=null;
EntityTransaction entityTransaction=null;
public PersonManager() {
entityManager = JPAProvider.getEntityManagerFactory().createEntityManager();//session factory
entityTransaction = entityManager.getTransaction();
}
public Boolean addUser(String username , String password , String email , String sex)
{
try{
entityTransaction.begin();
Person person = new Person();
person.setUsername(username);
person.setPassword(password);
person.setEmail(email);
person.setSex(sex);
entityManager.persist(person);
entityTransaction.commit();
entityManager.close();
}catch (Exception e){
System.out.println(e.getStackTrace());
System.out.println("addUser failed");
}
return true;
}
}
Класс:
package model.entity;
import model.bl.PersonManager;
import javax.persistence.*;
import java.io.Serializable;
import java.util.List;
//mapping class to table
@Entity (name = "person")
@Table(name = "USERS")
@EntityListeners(value = PersonManager.class)
public class Person implements Serializable
{
@Id // create id and fill auto by sequence in database
@Column(name="UID" ,columnDefinition = "NUMBER" )
@SequenceGenerator(name = "mySeq" , sequenceName = "DB_MYSEQ")
@GeneratedValue(strategy=GenerationType.AUTO ,generator="mySeq")
private long uId;
@OneToMany(cascade = CascadeType.ALL, fetch = FetchType.EAGER)
@JoinColumn(name = "FK_PERSON",referencedColumnName = "UID")
private List<Pictures> picturesList;
@Basic
@Column (name = "USERNAME" , columnDefinition = "NVARCHAR2(30)" , nullable = false , unique = true)
private String username ;
@Basic
@Column (name = "USER_PASSWORD" , columnDefinition = "NVARCHAR2(32)" , nullable = false , unique = true)
private String password ;
@Basic
@Column (name = "EMAIL" , columnDefinition = "NVARCHAR2(40)" , nullable = false)
private String email;
@Basic
@Column (name = "SEX" , columnDefinition = "NVARCHAR2(20)")
private String sex ;
//--------------------------------------------------------
public Person() { }
public Person(String username, String password, String email, String sex, String userPic) {
this.username = username;
this.password = password;
this.email = email;
this.sex = sex;
this.userPic = userPic;
}
public Person(String username, String password, String email ,String sex, String userPic,List<Pictures> picturesList ) {
this.picturesList = picturesList;
this.sex = sex;
this.userPic = userPic;
this.email = email;
this.password = password;
this.username = username;
}
//--------------------------------------------------------
public void setUsername(String username) {
this.username = username;
}
public void setPassword(String password) {
this.password = password;
}
public void setEmail(String email) {
this.email = email;
}
public void setUserPic(String userPic) {
this.userPic = userPic;
}
public void setSex(String sex) {
this.sex = sex;
}
public void setuId(long uId) {this.uId = uId;}
//--------------------------------------------------------
public String getUsername() {
return username;
}
public String getPassword() {
return password;
}
public String getUserPic() {
return userPic;
}
public String getEmail() {
return email;
}
public String getSex() {
return sex;
}
public long getuId() {return uId;}
}
}
persistence.xml:
<persistence-unit name="MyConnection" transaction-type="RESOURCE_LOCAL">
<provider>org.hibernate.ejb.HibernatePersistence</provider>
<properties>
<!--<property name="hibernate.transaction.flush_before_completion" value="true"/>-->
<!--<property name="hibernate.format_sql" value="true"/>-->
<property name="hibernate.dialect" value="org.hibernate.dialect.Oracle10gDialect"/>
<property name="hibernate.connection.driver_class" value="oracle.jdbc.driver.OracleDriver"/>
<property name="hibernate.connection.username" value="midas"/>
<property name="hibernate.connection.password" value="midas123"/>
<property name="hibernate.connection.url" value="jdbc:oracle:thin:@localhost:1521:orcl"/>
<!--<property name="hibernate.hbm2ddl.auto" value="create-drop"/>-->
<property name="show_sql" value="true"></property>
<!-- <property name="hibernate.globally_quoted_identifiers" value="true"/>-->
</properties>
</persistence-unit>
В некоторых случаях говорили, что проблема была в потере javax.persistence.jar,Я добавляю новые javax.persistence.jar в мои библиотеки, но проблема не была решена.
Я использую:
tomcat 8 JDK 1.8.0-172 oracle 11g IntellyJ Idea
Iиспользуются следующие библиотеки:
1) hibernate-enverc-4.2.0.final
2) hibernate-jpa-2.0-api-1.0.1-final.jar
3) библиотека tomcat
Структура проекта:
src -> controller -> Manager.java
src -> модель -> bl -> personManager.java
src -> entity -> person.java
src -> util -> JPAProvider.java
src -> META-INF --> persistence.xml
web -> views -> ...
web -> WEB-INF -> lib
web -> WEB-INF -> web.xml
Как я могу исправить эту ошибку?