Simple Example of EJB integration with JSF

Simple Example of EJB integration with JSF

Program directory:

Running effect:

1. First import the jar package,

Import necessary JSF jar packages and hibernate3.6jar packages
(Jsf jar will be available for download later)

2. Configure the Data source: Create the/MATA-INF/persistence. xml file under src

  
     
         
    
     java:jboss/datasources/localTrans/FirstTest
          
             
              
              
       
        
       
      
     
       
   
  

Configure the data source in jboss. Specific configuration -- (please follow the blog below) 3. Add the jsf controller to web. xml

The. jsf request is intercepted here (you can write it as needed)

  
    
   
    JSF
         
         
    
     javax.faces.CONFIG_FILES
          
    
     /WEB-INF/faces-config.xml
          
         
             
    
     Faces Servlet
              
    
                   javax.faces.webapp.FacesServlet          
              
    
     1
          
         
             
    
     Faces Servlet
              
    
     *.jsf
         
       
       
    
     index.jsp
      
     
  

4. The page is as follows:

Index. jsp

  
    
   
    JSF
         
         
    
     javax.faces.CONFIG_FILES
          
    
     /WEB-INF/faces-config.xml
          
         
             
    
     Faces Servlet
              
    
                   javax.faces.webapp.FacesServlet          
              
    
     1
          
         
             
    
     Faces Servlet
              
    
     *.jsf
         
       
       
    
     index.jsp
      
     
  

Success. jsp

<%@ page language=java import=java.util.* pageEncoding=UTF-8%><%@ taglib uri=http://java.sun.com/jsf/core prefix=f %><%@ taglib uri=http://java.sun.com/jsf/html prefix=h %>

Jboss-based JSF + EJB + JPA integration successful All messages 5. configuring jsf: creating a WEB-INF under a faces-config.xml

      
     
       
    
     addNews
        
    
     com.etoak.controller.AddNewsBean
        
    
     session
    
   
       
    
     viewAll
        
    
     com.etoak.controller.ViewAllNews
        
    
     session
    
   
       
    
     /index.jsp
        
            
     
      success
             
     
      /success.jsp
         
    
   
       
    
     /success.jsp
        
            
     
      /success.jsp
         
    
   
  

6. Compile the ejb Entity bean:

package com.etoak.entity;import javax.persistence.Column;import javax.persistence.Entity;import javax.persistence.GeneratedValue;import javax.persistence.GenerationType;import javax.persistence.Id;import javax.persistence.Table;@Entity@Table(name=news_table)public class News {    @Id    @GeneratedValue(strategy = GenerationType.IDENTITY)    private int id;    @Column(name=news_title,nullable=true)    private String title;    @Column(name=news_content,nullable=true)    private String content;    public int getId() {        return id;    }    public void setId(int id) {        this.id = id;    }    public String getTitle() {        return title;    }    public void setTitle(String title) {        this.title = title;    }    public String getContent() {        return content;    }    public void setContent(String content) {        this.content = content;    }   }

7. Write the eao layer (dao layer). Here we add the service Middle Layer

NewsEao. java

package com.etoak.eao;import java.util.List;import javax.ejb.Local;import com.etoak.entity.News;@Localpublic interface NewsEao {    public News get(Integer id);    public void save(News news);    public void update(News news);    public void delete(Integer id);    public void delete(News news);    public List
  
    findAll();}
  

NewsEaoImpl. java

Package com. etoak. eao; import java. util. list; import javax. ejb. stateless; import javax. persistence. entityManager; import javax. persistence. persistenceContext; import com. etoak. entity. news; @ Stateless (name = newsEao) public class NewsEaoBean implements NewsEao {// dependency injection EntityManager component @ PersistenceContext (unitName = newsUnit) private EntityManager em; @ Override public News get (Integer id) {return em. find (News. class, id) ;}@ Override public void save (News news) {em. persist (news) ;}@ Override public void update (News news) {em. merge (news) ;}@ Override public void delete (Integer id) {em. remove (get (id) ;}@ Override public void delete (News news) {em. remove (news) ;}@ Override public List
  
   
FindAll () {return (List
   
    
) Em. createQuery (select news from News as news). getResultList ();}}
   
  

NewsService. java

package com.etoak.service;import java.util.List;import javax.ejb.Local;import com.etoak.entity.News;@Localpublic interface NewsService {    public int addNews(String title,String content);    List
  
    getAllNews();}
  

NewsServiceImpl. java

package com.etoak.service;import java.util.List;import javax.ejb.EJB;import javax.ejb.Stateless;import javax.ejb.TransactionAttribute;import javax.ejb.TransactionAttributeType;import javax.ejb.TransactionManagement;import javax.ejb.TransactionManagementType;import com.etoak.eao.NewsEao;import com.etoak.entity.News;@Stateless(name=newsService)@TransactionManagement(TransactionManagementType.CONTAINER)public class NewsServiceImpl implements NewsService {    @EJB(beanName=newsEao)    private NewsEao newsEao;    @Override@TransactionAttribute(TransactionAttributeType.REQUIRED)    public int addNews(String title, String content) {        News news = new News();        news.setTitle(title);        news.setContent(content);        newsEao.save(news);        return news.getId();    }    @Override@TransactionAttribute(TransactionAttributeType.REQUIRED)    public List
  
    getAllNews() {        return newsEao.findAll();    }}
  

8. controller layer. The managed bean of jsf is used here.

AddNewsBean. java

package com.etoak.controller;import javax.ejb.EJB;import com.etoak.service.NewsService;public class AddNewsBean {    @EJB(beanName=newsService)    private NewsService newsService;    private String title;    private String content;    public String getTitle() {        return title;    }    public void setTitle(String title) {        this.title = title;    }    public String getContent() {        return content;    }    public void setContent(String content) {        this.content = content;    }    public String addNews(){        newsService.addNews(title, content);        return success;    }}

ViewAllNews. java

package com.etoak.controller;import java.util.List;import javax.ejb.EJB;import com.etoak.entity.News;import com.etoak.service.NewsService;public class ViewAllNews {    @EJB(beanName=newsService)    private NewsService newsService;    private List
  
    newsList;    public void setNewsList(List
   
     newsList){        this.newsList = newsList;    }    public List
    
      getNewsList(){        return newsService.getAllNews();    }}