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EJB整合JSF简单的小例子

时间：2015-09-28 11:50:08      阅读：325      评论：0      收藏：0      [点我收藏+]

标签：ejb   jsf   

程序目录：
技术分享
运行效果：
技术分享
技术分享
一、首先导入jar包，导入JSF必要 jar包以及hibernate3.6jar包
（jsf jar稍后提供下载）
二、配置数据源：

  • 在src下建立/MATA-INF/persistence.xml 文件
<?xml version="1.0" encoding="UTF-8"?>
<persistence version="2.0"
   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">
   <persistence-unit name="newsUnit">
      <jta-data-source>java:jboss/datasources/localTrans/FirstTest</jta-data-source>
      <properties>
         <!-- Properties for Hibernate -->
         <property name="hibernate.hbm2ddl.auto" value="update" />
         <property name="hibernate.show_sql" value="false" />
         <property name="hibernate.dialect" value="org.hibernate.dialect.MySQLDialect" />
      </properties>
   </persistence-unit>
</persistence>

  • jboss中配置数据源。具体配置——（请关注下篇博客）

    三、web.xml中添加 jsf 控制器，这里拦截的是.jsf请求（可以随便写） 

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.0" 
    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-app_3_0.xsd">
  <display-name>JSF</display-name>  
    <context-param>  
    <param-name>javax.faces.CONFIG_FILES</param-name>  
    <param-value>/WEB-INF/faces-config.xml</param-value>  
    </context-param>  
    <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>*.jsf</url-pattern>  
   </servlet-mapping>  
  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>  
</web-app>

四、页面如下
index.jsp

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.0" 
    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-app_3_0.xsd">
  <display-name>JSF</display-name>  
    <context-param>  
    <param-name>javax.faces.CONFIG_FILES</param-name>  
    <param-value>/WEB-INF/faces-config.xml</param-value>  
    </context-param>  
    <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>*.jsf</url-pattern>  
   </servlet-mapping>  
  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>  
</web-app>

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" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <title>添加成功</title>
  </head>
  <body>
  <h1>基于jboss的JSF+EJB+JPA整合成功</h1>
  <h2>所有消息</h2>
  <f:view>
  <h:dataTable width="600px" border="1" value="#{viewAll.newsList }" var="news" rowClasses="odd,even">
    <f:facet name="caption" >
        <h:outputText value="消息列表" />
    </f:facet>
    <h:column>
        <f:facet name="header">
            <h:outputText value="消息ID"></h:outputText>
        </f:facet>
        <h:outputText value="#{news.id }"></h:outputText>
    </h:column>

    <h:column>
        <f:facet name="header">
            <h:outputText value="消息标题"></h:outputText>
        </f:facet>
        <h:outputText value="#{news.title }"></h:outputText>
    </h:column>
    <h:column>
        <f:facet name="header">
            <h:outputText value="消息内容"></h:outputText>
        </f:facet>
        <h:outputText value="#{news.content }"></h:outputText>
    </h:column>
  </h:dataTable>
  </f:view>
  </body>
</html>

五、配置 jsf : 在WEB-INF下建立 faces-config.xml

<?xml version="1.0"?>  
 <!DOCTYPE faces-config PUBLIC  
 "-//Sun Microsystems, Inc.//DTD JavaServer Faces Config 1.0//EN"  
 "http://java.sun.com/dtd/web-facesconfig_1_0.dtd">
 <faces-config>  
 <managed-bean>
    <managed-bean-name>addNews</managed-bean-name>
    <managed-bean-class>com.etoak.controller.AddNewsBean</managed-bean-class>
    <managed-bean-scope>session</managed-bean-scope>
</managed-bean>
<managed-bean>
    <managed-bean-name>viewAll</managed-bean-name>
    <managed-bean-class>com.etoak.controller.ViewAllNews</managed-bean-class>
    <managed-bean-scope>session</managed-bean-scope>
</managed-bean>
<navigation-rule>
    <from-view-id>/index.jsp</from-view-id>
    <navigation-case>
        <from-outcome>success</from-outcome>
        <to-view-id>/success.jsp</to-view-id>
    </navigation-case>
</navigation-rule>
<navigation-rule>
    <from-view-id>/success.jsp</from-view-id>
    <navigation-case>
        <to-view-id>/success.jsp</to-view-id>
    </navigation-case>
</navigation-rule>
</faces-config>

六、编写ejb实体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、编写会eao层（dao层），这里我们加入service中间层
NewsEao.java

package com.etoak.eao;
import java.util.List;
import javax.ejb.Local;
import com.etoak.entity.News;
@Local
public 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<News> 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{
    //依赖注入EntityManager组件
    @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<News> findAll() {
        return (List<News>)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;
@Local
public interface NewsService {
    public int addNews(String title,String content);
    List<News> 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<News> getAllNews() {
        return newsEao.findAll();
    }
}

八、controller层。这里使用jsf的托管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<News> newsList;
    public void setNewsList(List<News> newsList){
        this.newsList = newsList;
    }
    public List<News> getNewsList(){
        return newsService.getAllNews();
    }
}

版权声明：本文为博主原创文章，未经博主允许不得转载。

EJB整合JSF简单的小例子

标签：ejb   jsf   

原文地址：http://blog.csdn.net/frightingforambition/article/details/48781983
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