EJB整合JSF簡單的小例子

EJB整合JSF簡單的小例子

程式目錄：

運行效果：

一、首先匯入jar包，

匯入JSF必要 jar包以及hibernate3.6jar包
（jsf jar稍後提供下載）

二、配置資料來源：在src下建立/MATA-INF/persistence.xml 檔案

         java:jboss/datasources/localTrans/FirstTest                                                   

jboss中配置資料來源。具體配置——（請關注下篇部落格）三、web.xml中添加 jsf 控制器

這裡攔截的是.jsf請求（可以隨便寫）

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

四、頁面如下

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 %>

基於jboss的JSF+EJB+JPA整合成功 所有訊息 五、配置 jsf : 在WEB-INF下建立 faces-config.xml

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

六、編寫ejb實體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;    }   }

七、編寫會eao層（dao層），這裡我們加入service中介層

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{    //依賴注入EntityManager組件    @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();    }}

八、controller層。這裡使用jsf的託管bean.

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();    }}