JSF 기술로 createBook.xhtml
이고 관리 Beans를 사용하는 웹 응용 프로그램을 만들었습니다. 이 페이지에서 사용자는 입력 필드에 필수 정보를 입력하고 제출 버튼을 누르십시오. 그런 다음이 정보는 doCreateBook()
메서드를 사용하여 데이터베이스에 유지되어야합니다. 이 웹 응용 프로그램에 Tomcat 7.0 서버를 사용합니다.javax.naming.NameNotFoundException : 이름 [attribute name]이이 컨텍스트에 바인드되어 있지 않습니다. [클래스 이름]을 (를) 찾을 수 없습니다.
의이 내가 얻을 오류 메시지가 먼저 시작하자 :
package com.mysite.bookecommerce.beans;
import java.io.Serializable;
import javax.ejb.EJB;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.RequestScoped;
import com.mysite.bookecommerce.entities.Book;
@ManagedBean(name = "BookController")
@RequestScoped
public class BookController implements Serializable {
private static final long serialVersionUID = 1L;
@EJB
private BookEJB bookEJB;
private Book book = new Book();
public String doCreateBook() throws Exception{
book = bookEJB.createBook(book);
return "bookCreationSuccessful.xhtml";
}
public void doDeleteBook() throws Exception{
bookEJB.deleteBook(book);
}
public void doUpdateBook() throws Exception {
book = bookEJB.updateBook(book);
}
public BookController() {
super();
}
}
BookEJB 클래스는 다음과 같습니다 :
javax.naming.NameNotFoundException: Name [com.mysite.bookecommerce.beans.BookController/bookEJB] is not bound in this Context. Unable to find [com.mysite.bookecommerce.beans.BookController].
BookController는 것은 코드는 EJB입니다
package com.mysite.bookecommerce.beans; import java.util.List; import javax.ejb.Stateful; import javax.persistence.EntityManager; import javax.persistence.PersistenceContext; import javax.persistence.PersistenceContextType; import javax.persistence.Query; import com.mysite.bookecommerce.entities.Book; @Stateful public class BookEJB { @PersistenceContext(unitName = "BookECommercePU", type = PersistenceContextType.EXTENDED) private EntityManager em; public Book createBook(Book book) throws Exception { em.persist(book); return book; } public void deleteBook(Book book) throws Exception { em.remove(book); } public Book updateBook(Book book) throws Exception { em.merge(book); return book; } @SuppressWarnings("unchecked") public List<Book> getBooks() throws Exception { Query query = em.createQuery("SELECT b from Book AS b"); return query.getResultList(); } }
@Entity
@Table(name = "BOOKS")
public class Book {
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private Long ID;
@Column(nullable = false)
private String name;
@Column(nullable = false, length = 2000)
private String description;
@Length(max = 10)
@Column(nullable = false)
private int isbn10;
@Length(max = 14)
private String isbn13;
@Column(nullable = false)
private String author;
private String publisher;
private int publishYear;
@Column(nullable = false)
private int numberOfPages;
@Column(nullable = false)
private double price;
private boolean illustrations;
private String dimension;
private double weight;
private int quantity;
//getters and setters
또한 faces-config.xml 파일 :
<?xml version="1.0" encoding="UTF-8"?>
<faces-config
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-facesconfig_2_0.xsd"
version="2.0">
<managed-bean>
<managed-bean-name>BookController</managed-bean-name>
<managed-bean-class>com.mysite.bookecommerce.beans.BookController</managed-bean-class>
<managed-bean-scope>request</managed-bean-scope>
</managed-bean>
그리고 마지막의 web.xml 코드 :
예약 코드는 엔티티 클래스입니다
<?xml version="1.0" encoding="UTF-8"?> <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0"> <display-name>BookECommerce</display-name> <welcome-file-list> <welcome-file>index.html</welcome-file> <welcome-file>index.htm</welcome-file> </welcome-file-list> <servlet> <servlet-name>Faces Servlet</servlet-name> <servlet-class>javax.faces.webapp.FacesServlet</servlet-class> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>Faces Servlet</servlet-name> <url-pattern>/faces/*</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>Faces Servlet</servlet-name> <url-pattern>*.jsf</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>Faces Servlet</servlet-name> <url-pattern>*.faces</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>Faces Servlet</servlet-name> <url-pattern>*.xhtml</url-pattern> </servlet-mapping> <context-param> <param-name>javax.faces.PROJECT_STAGE</param-name> <param-value>Development</param-value> </context-param> <context-param> <param-name>javax.servlet.jsp.jstl.fmt.localizationContext</param-name> <param-value>resources.application</param-value> </context-param> <context-param> <description>State saving method: 'client' or 'server' (=default). See JSF Specification 2.5.2</description> <param-name>javax.faces.STATE_SAVING_METHOD</param-name> <param-value>client</param-value> </context-param> <context-param> <param-name>org.apache.myfaces.ALLOW_JAVASCRIPT</param-name> <param-value>true</param-value> </context-param> <context-param> <param-name>org.apache.myfaces.PRETTY_HTML</param-name> <param-value>true</param-value> </context-param> <context-param> <param-name>org.apache.myfaces.DETECT_JAVASCRIPT</param-name> <param-value>false</param-value> </context-param> <context-param> <param-name>org.apache.myfaces.AUTO_SCROLL</param-name> <param-value>true</param-value> </context-param> <listener> <listener-class>org.apache.myfaces.webapp.StartupServletContextListener</listener-class> </listener>
문제는 내 웹 응용 프로그램이 해당 BookController EJB를 찾지 못하는 것 같습니다. 어떻게 해결할 수 있을까요? 나는 당신이 faces-config.xml 파일에 그것을 추가해야한다는 것을 읽었지만 나는 그것을 추가했고 여전히 나는이 에러를 얻는다.
북 엔티티 클래스의 모든 가져 오기 행은 코드 스 니펫을 길게 만들었 기 때문에 가져 왔음을 유의하십시오.
TomEE를 설치하면 웹 응용 프로그램이 작동합니다. 고마워요 :) –