Hibernate 是一个开源免费的、基于 ORM 技术的 Java 持久化框架。简单的说，Hibernate 是一个用来连接和操作数据库的 Java 框架，在企业中是经常使用的，那hibernate+struts2增删查改如何操作?接下来我们就来给大家讲解一下这方面的内容。
配置如下：
hibernate.hbm.xml配置：
<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD 3.0//EN" "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd"> <hibernate-configuration> <session-factory> <property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property> <property name="hibernate.connection.url">jdbc:mysql://localhost:3306/zhenzai?characterEncoding=GBK</property> <property name="hibernate.connection.username">root</property> <property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property> <property name="show_sql">true</property> <mapping resource="com/model/News.hbm.xml"/> </session-factory> </hibernate-configuration>
com.model.News.java配置：
package com.model;
// Generated 2017-3-14 10:57:00 by Hibernate Tools 5.2.0.CR1
import java.util.Date;
/**
* News generated by hbm2java
*/
public class News implements java.io.Serializable
{
private Integer ids;
private String title;
private Date time;
private String content;
public News()
{}
public News(String title, Date time, String content)
{
this.title = title;
this.time = time;
this.content = content;
}
public Integer getIds()
{
return this.ids;
}
public void setIds(Integer ids)
{
this.ids = ids;
}
public String getTitle()
{
return this.title;
}
public void setTitle(String title)
{
this.title = title;
}
public Date getTime()
{
return this.time;
}
public void setTime(Date time)
{
this.time = time;
}
public String getContent()
{
return this.content;
}
public void setContent(String content)
{
this.content = content;
}
}com.model.News..hbm.xml配置：
<?xml version="1.0"?> <!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd"> <!-- Generated 2017-3-14 10:57:01 by Hibernate Tools 5.2.0.CR1 --> <hibernate-mapping> <class name="com.model.News" table="news" catalog="zhenzai" optimistic-lock="version"> <id name="ids" type="java.lang.Integer"> <column name="ids" /> <generator class="identity" /> </id> <property name="title" type="string"> <column name="title" /> </property> <property name="time" type="timestamp"> <column name="time" length="19" /> </property> <property name="content" type="string"> <column name="content" /> </property> </class> </hibernate-mapping>
com.dao.HibernateUtil.java配置：
package com.dao;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;
import javafx.util.BuilderFactory;
public class HibernateUtil
{
private static final SessionFactory factory = BuilderFactory();
private static final ThreadLocal < Session > lock = new ThreadLocal < Session > ();
private static SessionFactory BuilderFactory()
{
Configuration config = new Configuration()
.configure();
return config.buildSessionFactory();
}
public static Session getsession()
{
Session session = lock.get();
if (session == null)
{
session = factory.openSession();
lock.set(session);
}
return session;
}
public static void closeSession()
{
Session session = lock.get();
if (session != null)
{
session.close();
lock.set(null);
}
}
}com.dao.NewsDao.java配置：
package com.dao;
import java.util.ArrayList;
import java.util.List;
import org.hibernate.Session;
import com.model.News;
public class NewsDao
{
private Session session = null;
public NewsDao()
{
session = HibernateUtil.getsession();
}
public List < News > select()
{
List < News > list = new ArrayList < News > ();
try
{
list = session.createQuery("from News")
.getResultList();
}
catch (Exception e)
{
e.printStackTrace();
}
finally
{
HibernateUtil.closeSession();
}
return list;
}
public News select(int ids)
{
News list = new News();
try
{
list = (News) session.createQuery("from News where ids=?")
.setParameter(0, ids)
.getSingleResult();
}
catch (Exception e)
{
e.printStackTrace();
}
finally
{
HibernateUtil.closeSession();
}
return list;
}
public void insert(News news)
{
try
{
session.beginTransaction();
session.save(news);
session.getTransaction()
.commit();
}
catch (Exception e)
{
e.printStackTrace();
session.getTransaction()
.rollback();
}
finally
{
HibernateUtil.closeSession();
}
}
public void update(News news)
{
try
{
session.beginTransaction();
News n = session.get(News.class, news.getIds());
n.setTitle(news.getTitle());
n.setTime(news.getTime());
n.setContent(news.getContent());
session.update(n);
session.getTransaction()
.commit();
}
catch (Exception e)
{
e.printStackTrace();
session.getTransaction()
.rollback();
}
finally
{
HibernateUtil.closeSession();
}
}
public void delete(int ids)
{
try
{
session.beginTransaction();
News n = session.get(News.class, ids);
session.delete(n);
session.getTransaction()
.commit();
}
catch (Exception e)
{
e.printStackTrace();
session.getTransaction()
.rollback();
}
finally
{
HibernateUtil.closeSession();
}
}
}接下来就是配置struts的内容：
web.xml配置：
<?xml version="1.0" encoding="UTF-8"?> <web-app id="WebApp_9" version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"> <display-name>Struts Blank</display-name> <filter> <filter-name>struts2</filter-name> <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class> </filter> <filter-mapping> <filter-name>struts2</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <welcome-file-list> <welcome-file>index.html</welcome-file> </welcome-file-list> </web-app> index.htmlstruts.xml配置：
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
"http://struts.apache.org/dtds/struts-2.3.dtd">
<struts>
<constant name="struts.enable.DynamicMethodInvocation" value="false" />
<constant name="struts.devMode" value="true" />
<package name="default" namespace="/" extends="struts-default">
<action name="*_*" class="com.controller.{1}Action" method="{2}">
<result>
{1}_{2}.jsp
</result>
</action>
</package>
</struts>com.controller.NewsAction.java配置：
package com.controller;
import java.util.List;
import javax.servlet.http.HttpServletRequest;
import org.apache.struts2.ServletActionContext;
import com.dao.NewsDao;
import com.model.News;
import com.opensymphony.xwork2.ActionSupport;
public class NewsAction extends ActionSupport
{
private int ids; //创建一个ids字段，供前后端调用时使用
private News news; //创建一个news对象，供前端调用时直接使用news.xxxx
public int getIds()
{
return ids;
}
public void setIds(int ids)
{
this.ids = ids;
}
public News getNews()
{
return news;
}
public void setNews(News news)
{
this.news = news;
}
public String get()
{ //对应News_get.jsp界面
news = new NewsDao()
.select(ids);
return SUCCESS;
}
public String getAll()
{ //对应News_getAll.jsp界面
List < News > list = new NewsDao()
.select();
HttpServletRequest req = ServletActionContext.getRequest(); //后端直接使用request搭建前后端连接
req.setAttribute("list", list);
return SUCCESS;
}
public String add()
{ //对应News_add.jsp界面
return SUCCESS;
}
public String insert()
{ //对应News_insert.jsp界面
new NewsDao()
.insert(news);
return SUCCESS;
}
public String edit()
{ //对应News_edit.jsp界面
news = new NewsDao()
.select(ids);
return SUCCESS;
}
public String update()
{ //对应News_update.jsp界面
new NewsDao()
.update(news);
return SUCCESS;
}
public String delete()
{ //对应News_delete.jsp界面
new NewsDao()
.delete(ids);
return SUCCESS;
}
}News_getAll.jsp配置:
<%@ page language="java" contentType="text/html; charset=utf-8"
pageEncoding="utf-8"%>
<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<!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>
<h1>新闻显示</h1>
<div>
<c:forEach var="l" items="${list }">//获取getAll方法中request提供的list
<div>
<a href="News_get?ids=${l.ids }">${l.ids } ${l.title }</a> <a href="News_edit?ids=${l.ids }">修改</a><a href="News_delete?ids=${l.ids }">删除</a>
</div>
</c:forEach>
</div>
<div>
<a href="News_add">添加</a>
</div>
</body>
</html>
News_get.jsp配置：
<%@ page language="java" contentType="text/html; charset=utf-8"
pageEncoding="utf-8"%>
${news.title }//使用的是NewsAction方法中的private News news;
${news.time }
${news.content }News_add.jsp配置：
<%@ page language="java" contentType="text/html; charset=utf-8" pageEncoding="utf-8"%> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <title>Insert title here</title> </head> <body> <h1>新闻添加</h1> <form action="News_insert" method="post"> 标题：<input type="text" name="news.title"><br>//使用的是NewsAction方法中的private News news; 时间：<input type="text" name="news.time"><br> 内容：<textarea rows="10" cols="12" name="news.content"></textarea> <input type="submit" value="添加"> </form> </body> </html
News_insert.jsp配置：
<%@ page language="java" contentType="text/html; charset=utf-8" pageEncoding="utf-8"%> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <title>Insert title here</title> </head> <body> 添加成功 </body> </html>
News_edit.jsp配置：
<%@ page language="java" contentType="text/html; charset=utf-8"
pageEncoding="utf-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Insert title here</title>
</head>
<body>
<form method="post" action="News_update">
<input type="hidden" name="news.ids" value="${news.ids }"><br>//使用的是NewsAction方法中的private News news;
标题：<input type="text" name="news.title" value="${news.title }"><br>
时间：<input type="text" name="news.time" value="${news.time }"><br>
内容：<textarea rows="10" cols="10" name="news.content" >${news.content }</textarea>
<input type="submit" value="修改">
</form>
</body>
</html>News_update.jsp配置：
<%@ 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> 修改成功 </body> </html>
News_delete.jsp配置：
<%@ 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> 删除成功 </body> </html>
这样我们就实现了hibernate+struts2增删查改的相关流程，整个流程看起来很长，但是只要我们掌握好技巧，理清逻辑思维，还是很简单的，大家可以试试!最后大家如果想要了解更多java架构师知识，敬请关注奇Q工具网。
推荐阅读：