SSH框架简化（struts2+spring+hibernate）

package news.dao;

import java.util.ArrayList;
import java.util.List;

import javax.annotation.Resource;

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.query.Query;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.context.annotation.Scope;
import org.springframework.stereotype.Repository;

import news.entity.News;

//@Repository("myNewsDao")
@Repository
@Scope("prototype")
public class NewsDaoImpl implements NewsDao {
	
	@Autowired
	//@Qualifier("mySessionFactory")
	//@Resource(name="mySessionFactory")
	private SessionFactory sf;

	@Override
	public List showAllNews() {
		Session session = sf.openSession();
		session.getTransaction().begin();
		
		Query query = session.createQuery("from News");

		List<News> allNewList  = query.getResultList();
		
		session.getTransaction().commit();
		session.close();
	
		return allNewList;
	}

	@Override
	public String findNews() {
		return null;
	}

	@Override
	public String deleteSingleNews(Integer id) {
		Session session = sf.openSession();
		//Session session = sf.getCurrentSession();//它会与事务关联，并且在事务后自动关闭
		Query query = session.createQuery("from News where id=:myid");
		
		query.setParameter("myid", id);
		List<News> deleteList  = query.getResultList();
		//如果搜索出来是1条，就删除，如果是0条就不管了
		if ( deleteList.size()==1 ) {
			News news = deleteList.get(0);
			System.out.println("删除对象："+news.getTitle()+ " Id:"+news.getId());
			session.getTransaction().begin();
			session.delete(news);
			session.getTransaction().commit();
			session.close();
			//sessionFactory关闭策略
			//1.坚持使用数据库连接池（例如C3P0）
			//2.sessionFactory就不关闭，而使用hibernate事务自动关闭功能
			// 说明：sf.openSession();  必须关闭
			//    sf.openSession(); 改为：sf.getCurrentSession();
			//getCurrentSession创建的线程会在事务提交或者事务回滚后自动关闭
			//sf.close();
		}
		
		
		return "deleteOK";
	}

}

package news.service;

import java.util.List;

public interface NewsService {
	public List showAllNews();
	public String findNews();
	public String deleteSingleNews(Integer id);
}

package news.service;

import java.util.List;

import javax.annotation.Resource;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.context.annotation.Scope;
import org.springframework.stereotype.Service;

import news.dao.NewsDao;
import news.entity.News;

//@Service("myNewsService")
@Service
@Scope("prototype")
public class NewsServiceImpl implements NewsService {

	//Autowired和Qualifier 属于spring的注解，
	
	
	//jdk自带注解resource可以替代Autowired
	/*
	 * 用resource的好处：
	 * 1. 代码与spring 解耦，不依赖于spring
	 * 2. 代码中没有spring的存在，可以随时切换任意一套类似spring的框架
	 */
	@Autowired
	//@Qualifier("myNewsDao")
	//@Resource(name="myNewsDao") 
	private NewsDao nd;
	

	@Override
	public List showAllNews() {
		//可以增加一个业务逻辑，比如：把文章的内容进行截取为20字符
		//通过DAO获取数据
		List<News> allNewList = nd.showAllNews();
		//在return 之间，可以进行各种业务逻辑操作
		
		return allNewList;
	}

	@Override
	public String findNews() {
		// TODO Auto-generated method stub
		return null;
	}

	@Override
	public String deleteSingleNews(Integer id) {
		//需要做以下判断，例如有没有权限删除，又或者判断下面是否有级联子子记录
		
		//当可以删除时，调用DAO给直接删除
		String returnValue = "deleteFailed";
		returnValue = nd.deleteSingleNews(id);
		// TODO Auto-generated method stub
		return returnValue;
	}

}

package news.action;

import java.util.List;

import javax.annotation.Resource;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.context.annotation.Scope;
import org.springframework.stereotype.Controller;

import com.opensymphony.xwork2.ActionSupport;

import news.entity.News;
import news.service.NewsService;

//@Controller("myNewsAction")
@Controller               //默认就是类的首字母小写newsAction
@Scope("prototype")
public class NewsAction extends ActionSupport {
	
	private String message;
	
	public String getMessage() {
		return message;
	}

	public void setMessage(String message) {
		this.message = message;
	}

	//获取从客户端传递过来的值
	private Integer id;
	public Integer getId(){
		return this.id;
	}
	
	//strtus自动的赋值
	public void setId(Integer id) {
		this.id = id;
	}
	
	
	@Autowired
	//@Qualifier("myNewsService")
	//@Resource(name="myNewsService")
	private NewsService ns;
	
	//定义1个list用于前端jsp显示
	private List<News> allNewList;

	public List<News> getAllNewList() {
		return allNewList;
	}

	//显示首页所有数据
	public String showAllNews(){
		//调用service 中的showAllNews，获取所有的数据，
		//然后保存到
		allNewList = ns.showAllNews();
		return "success";
	}
	
	//显示首页所有数据（查询使用的。PS:本例没用到）
	public String findNews(){
		return "";
	}
	
	public String deleteSingleNews(){
		System.out.println("从客户端传递过来的ID:"+id);
		String returnValue = ns.deleteSingleNews(id);
		return returnValue;
	}
	
}

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%><%
    
    response.sendRedirect("NewsAction_showAllNews.action");
%>

<?xml version="1.0" encoding="UTF-8"?>
<hibernate-mapping xmlns="http://www.hibernate.org/xsd/hibernate-mapping">
  
     <class name="news.entity.News" table="news">
        <id name="id" column="id">
        	<generator class="native"></generator>
        </id>
        <property name="title" type="string" length="50" column="title" not-null="true"></property>
        <property name="content" type="text" length="50000" column="content" not-null="true"></property>
        <property name="begintime" type="date" column="begintime" not-null="true"></property>
        <property name="username" type="string" length="20" column="username" not-null="true"></property>
    </class>
</hibernate-mapping>

<!-- mysql数据库 -->
jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/news
jdbc.user=root
jdbc.password=123456

<-- oracle数据库 -->
#oracle
jdbc_oracle.driver=oracle.jdbc.driver.OracleDriver
jdbc_oracle.url=jdbc:oracle:thin@127.0.0.1:1521:orcl
jdbc_oracle.user=news
jdbc_oracle.password=123456

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@ taglib uri="/struts-tags" prefix="s" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>

提示信息：<s:property value="message"/>
删除id：<s:property value="id"/> 
<br><br><br><br>

<s:iterator value="allNewList">
	<s:property value="id"/>
	<s:property value="title"/>
	<s:a value="NewsAction_deleteSingleNews?id=%{id}">删除</s:a>
	<br>
</s:iterator>
</body>
</html>

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
ok
</body>
</html>