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本文主要使用MyEclipse来开发整合了Struts和Hibernate的应用，重点在于对二者MyEclipse提供支持的工具的使用，如果对于Struts和Hibernate还没有了解的朋友，建议先了解一些Struts和Hibernate的相关概念。
/**
* 得到所有的记录
*
* @return 记录的列表
*/
public List getVipdataList()
{
Session session = null;
try
{
session = SessionFactory.currentSession();
//创建一条HQL查询
Query query =
session.createQuery(
"select Vipdata from com.xiebing.hibernate.Vipdata Vipdata order by Vipdata.vipname");
return query.list();
}
catch (HibernateException e)
{
System.err.println("Hibernate Exception" + e.getMessage());
throw new RuntimeException(e);
}
finally
{
if (session != null)
{
try
{
session.close();
}
catch (HibernateException e)
{
System.err.println("Hibernate Exception" + e.getMessage());
throw new RuntimeException(e);
}
}
}
}
/**
* 添加一条新的记录
* @param data
*/
public void addVipdata(Vipdata data)
{
Session session = null;
try
{
session = SessionFactory.currentSession();
session.save(data);
session.flush();
}
catch (HibernateException e)
{
System.err.println("Hibernate Exception" + e.getMessage());
throw new RuntimeException(e);
}
finally
{
if (session != null)
{
try
{
session.close();
}
catch (HibernateException e)
{
System.err.println("Hibernate Exception" + e.getMessage());
throw new RuntimeException(e);
}
}
}
}
}
8、顺便简单说一下工具自动生成的SessionFactory的代码，SessionFactory.java
package com.xiebing.hibernate;
import net.sf.hibernate.HibernateException;
import net.sf.hibernate.Session;
import net.sf.hibernate.cfg.Configuration;
public class SessionFactory {
private static String CONFIG_FILE_LOCATION = "/hibernate.cfg.xml";
/** 保持session对象为单态
* 初始化一个ThreadLocal对象
* */
private static final ThreadLocal threadLocal = new ThreadLocal();
private static final Configuration cfg = new Configuration();
private static net.sf.hibernate.SessionFactory sessionFactory;
/**
* Returns the ThreadLocal Session instance.
*
* @return Session
* @throws HibernateException
*/
public static Session currentSession() throws HibernateException {
//多线程情况下共享数据库链接是不安全的。ThreadLocal保证了每个线程都有自己的s（数据库连接）
Session session = (Session) threadLocal.get();
if (session == null) {
if (sessionFactory == null) {
try {
cfg.configure(CONFIG_FILE_LOCATION);
sessionFactory = cfg.buildSessionFactory();
}
catch (Exception e) {
System.err.println("%%%% Error Creating SessionFactory %%%%");
e.printStackTrace();
}
}
//创建一个数据库连接实例
session = sessionFactory.openSession();
//保存该数据库连接s到ThreadLocal中
threadLocal.set(session);
}
return session;
}
/**
* Close the single hibernate session instance.
*
* @throws HibernateException
*/
public static void closeSession() throws HibernateException {
Session session = (Session) threadLocal.get();
threadLocal.set(null);
if (session != null) {
session.close();
}
}
/**
* Default constructor.
*/
private SessionFactory() {
}
}
9、切换到struts-config.xml文件的编辑界面，通过大纲视图选择action-mappings，点击右键－New Form,Action and JSP：
![]()
首先是创建FormBean的配置信息，具体配置如图，同时添加vipname和viptitle两个String类型的属性：
![]()
点击下一步进入Action的配置，如图所示：
![]()
切换Optional Details的标签到Forwards，加入success的跳转到AddVipData.jsp页面：
![]()
具体设置如图：
![]()
设置好了以后单击 完成，这样就完成了Struts中的FormBean 和Action的创建。
在struts-config.xml的编辑界面中，出现如下图所示图片：
![]()
可以清楚的看到jsp 、form 、action之间的关系。
10、修改struts的资源文件com.xiebing.struts.ApplicationResources的内容为：
errors.footer=
errors.header=Validation ErrorYou must correct the following error(s) before proceeding:
error.vipname.required=Need a vipname
error.viptitle.required=Need a viptitle
11、接下来修改action类：AddVipdata，和Formbean类：VipdataForm修改后的代码如下：
com.xiebing.action.AddVipdata类
package com.xiebing.action;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import com.xiebing.formbean.VipdataForm;
import com.xiebing.hibernate.Vipdata;
import com.xiebing.hibernate.VipService;
public class AddVipdata extends Action {
/**
* Method execute
* @param mapping
* @param form
* @param request
* @param response
* @return ActionForward
*/
public ActionForward execute(
ActionMapping mapping,
ActionForm form,
HttpServletRequest request,
HttpServletResponse response) {
VipdataForm AddVipdataForm = (VipdataForm) form;
if (AddVipdataForm.getVipname() != null)
{
Vipdata vipdata = new Vipdata();
vipdata.setViptitle(AddVipdataForm.getViptitle());
vipdata.setVipname(AddVipdataForm.getVipname());
VipService.getInstance().addVipdata(vipdata);
AddVipdataForm.clear();
}
return mapping.findForward("success");
}
}
com.xiebing.formbean.VipdataForm
package com.xiebing.formbean;
import javax.servlet.http.HttpServletRequest;
import org.apache.struts.action.ActionError;
import org.apache.struts.action.ActionErrors;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionMapping;
public class VipdataForm extends ActionForm {
/** vipname property */
private String vipname;
/** viptitle property */
private String viptitle;
// --------------------------------------------------------- Methods
/**
* Method validate
* @param mapping
* @param request
* @return ActionErrors
*/
public ActionErrors validate(
ActionMapping mapping,
HttpServletRequest request) {
ActionErrors errors = new ActionErrors();
if (vipname == null || vipname.length()
{
errors.add("vipName", new ActionError("error.vipname.required"));
}
if (viptitle == null || viptitle.length()
{
errors.add("vipTitle", new ActionError("error.viptitle.required"));
}
return errors;
}
public void reset(ActionMapping mapping, HttpServletRequest request) {
clear();
}
public String getVipname() {
return vipname;
}
public void setVipname(String vipname) {
this.vipname = vipname;
}
public String getViptitle() {
return viptitle;
}
public void setViptitle(String viptitle) {
this.viptitle = viptitle;
}
public void clear()
{
viptitle = null;
vipname = null;
}
}
至此,所以的编码工作已经全部完成,接下来要用MyEclipse来发布web应用
12、点击发布J2EE应用的工具栏图标:
![]()
弹出如下界面,点击Add按钮:
![]()
在接下来的窗口中,Server选择配置好的服务器,我这里选择:Tomcat5,然后点击完成.这样我们就完成了程序的发布,很简单,也很方便.
![]()
然后启动Tomcat5来运行我们的程序:
![]()
之后就可以通过浏览器来访问我们的程序了.还不赶快点呀!
本文来自ChinaUnix博客，如果查看原文请点：http://blog.chinaunix.net/u/2016/showart_39526.html |
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发表于 2005-08-07 14:40