昨天搭了这个框架实现用户登录，很高兴！同时也遇到了一些问题。不过总算完成了。

搭建环境：MyEclipse+Mysql

实现用户登录，以下为步骤：

1.在mysql中建立一个名为person的表。
表中数据：id varchar(32) no null primary key;
              name varchar(20) no null;
              password varchar(20) no null;
              
2.打开MyEclipse,从菜单中选择窗口，选择首选项，选择数据库浏览器。

3.配置数据库驱动（mysql-connector-java-5.1.6-bin.jar）。

4.选菜单的窗口，选择显示视图，选择其它，选MyEclipse中的DB Browser。点确定。从新窗口中选择New，连接数据库MySQL。

5.新建一个webproject,命名为SHLogin，加入Add Hibernate Capabilities...,选择Hibernate3.1,Next---Next----选择Mysql----Next----不创建工厂----Finish

6.src下新建接口cn.mldn.lxh.login6.dao,命名PersonDAO，写入代码如下：

package cn.mldn.lxh.login6.dao;

import cn.mldn.lxh.login6.vo.Person;

public interface PersonDAO {

 public boolean isLogin(Person person) throws Exception ; } 7.在src下新建一个类，包名cn.mldn.lxh.login6.vo,类名为Person，写入代码： package cn.mldn.lxh.login6.vo;

public class Person {

private String id; private String name; private String password; public String getId() {  return id; } public void setId(String id) {  this.id = id; } public String getName() {  return name; } public void setName(String name) {  this.name = name; } public String getPassword() {  return password; } public void setPassword(String password) {  this.password = password; }

}

8.在src下新建包名cn.mldn.lxh.login6.impl,类名LoginDAOImpl，覆写全部抽象方法。写入代码：

package cn.mldn.lxh.login6.impl;

import java.util.Iterator;

import java.util.List;

import org.hibernate.Query;

import org.hibernate.Session;

import cn.mldn.lxh.login6.dao.PersonDAO;

import cn.mldn.lxh.login6.factory.DefaultSessionFactory; import cn.mldn.lxh.login6.vo.Person;

public class PersonDAOImpl implements PersonDAO {

    private Session session;     public PersonDAOImpl()     {      this.session=DefaultSessionFactory.getSession();     }  public boolean isLogin(Person person) throws Exception {   boolean flag=false;   String hql="FROM Person AS p WHERE p.id=? AND p.password=?";   Query q= this.session.createQuery(hql);   //设置查询参数   q.setString(0, person.getId());   q.setString(1,person.getPassword());      Iterator iter=q.list().iterator();   if(iter.hasNext())   {    //修改成功标记    flag=true;    //从查找出的对象取出名字    person.setName(((Person) iter.next()).getName());   }   //关闭session连接   this.session.close();   return flag;     }

}

9.在src下新建工厂类cn.mldn.lxh.login6.factory,类名DAOFactory

package cn.mldn.lxh.login6.factory;

import cn.mldn.lxh.login6.dao.PersonDAO;

import cn.mldn.lxh.login6.impl.PersonDAOImpl;

public class DAOFactory {

public static PersonDAO getPersonDAOInstance() {    return new PersonDAOImpl();   } } 10.建立映射文件：点表person右键，选择Create Hibernate Mapping,创建在包cn.mldn.lxh.login6.vo下，下面第一个方块打钩，Next----主键生成方式：assigned，完成。 11.修改映射文件Person.hbm.xml,写入代码，如下： <?xml version="1.0" encoding="utf-8"?> <!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd"> <!--      Mapping file autogenerated by MyEclipse Persistence Tools --> <hibernate-mapping>     <class name="cn.mldn.lxh.login6.vo.Person" table="person" catalog="people">         <id name="id" type="java.lang.String">             <column name="id" length="32" />             <generator class="assigned" />         </id>         <property name="name" type="java.lang.String">             <column name="name" length="20" not-null="true" />         </property>         <property name="password" type="java.lang.String">             <column name="password" length="20" not-null="true" />         </property>     </class> </hibernate-mapping> 12.工厂包内新建一个类，命名DefaultSessionFactory,写入代码： package cn.mldn.lxh.login6.factory;

import org.hibernate.Session;

import org.hibernate.cfg.Configuration;

public class DefaultSessionFactory {

public static Session getSession() {  Session session=null;  session =new Configuration().configure().buildSessionFactory().openSession();     return session; } }

13.映射文件中选择show_sql---true

14.包cn.mldn.lxh.login6.vo下新建测试类（测试是否能连接数据库），类名TestDAO，主方法输出，写入代码： package cn.mldn.lxh.login6.vo;

import java.util.Iterator;

import java.util.List;

import org.hibernate.Query;

import org.hibernate.Session;

import cn.mldn.lxh.login6.factory.DAOFactory;

import cn.mldn.lxh.login6.factory.DefaultSessionFactory;

public class TestDAO {

 /**

  * @param args   * @throws Exception    */  public static void main(String[] args) throws Exception {      Session session = DefaultSessionFactory.getSession();   Person p=new Person();   p.setId("123456");   p.setPassword("123456");   String hql="FROM Person AS p WHERE p.id=? AND p.password=?";   Query q= session.createQuery(hql);   //设置查询参数   q.setString(0, p.getId());   q.setString(1,p.getPassword());   List list = q.list();   System.out.println(list.size());   Iterator iter=q.list().iterator();   System.out.println(DAOFactory.getPersonDAOInstance().isLogin(p));  }

}

15.项目添加Struts支持，包名cn.mldn.lxh.login6.struts。完成

16.添加一个JSP页面，名为login.jsp。Template to use：Standard JSP using Struts 1.2。代码修改如下： <%@ page language="java" pageEncoding="GbK"%> <%@ taglib uri="http://struts.apache.org/tags-bean" prefix="bean" %> <%@ taglib uri="http://struts.apache.org/tags-html" prefix="html" %> <%@ taglib uri="http://struts.apache.org/tags-logic" prefix="logic" %> <%@ taglib uri="http://struts.apache.org/tags-tiles" prefix="tiles" %> <html:html lang="true">   <head>     <title>登陆程序 —— Struts + DAO + Hibernate</title>   </head>      <body>  <center>   <h1>登陆程序 —— Struts + DAO + Hibernate</h1>   <hr>   <br>   <html:errors/>   <logic:present name="flag" scope="request">    <logic:equal name="flag" value="true">     <h2>登陆成功！！！</h2>     <h2>欢迎<font color="red">${person.name}</font>光临！！！</h2>    </logic:equal>    <logic:equal name="flag" value="false">     <h2>登陆失败！！！</h2>     <h2>错误的用户ID或密码！！！</h2>    </logic:equal>   </logic:present>   <br>   <html:form action="login.do" method="post">    用户ID：<html:text property="id"/><br>    密&nbsp;&nbsp;码：<html:password property="password"/><br>    <input type="hidden" name="status" value="login">    <html:submit value="登陆"/>    <html:reset value="重置"/>   </html:form>  </center>   </body> </html:html> 17.选择自定义透视图（Custonize Perspective） 选择struts 1.2,建立Struts 1.2 Form,Action&JSP

18.在src下建立Struts 1.2 Form,Action_JSP,Use case:login,Superclass:org.apache.struts.action.ActionForm,

添加Form Properties，name和password----->next----->Finish 19.修改struts-config.xml,代码如下： <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE struts-config PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 1.2//EN" "http://struts.apache.org/dtds/struts-config_1_2.dtd">

<struts-config>

 <data-sources />  <form-beans>   <form-bean name="loginForm"    type="cn.mldn.lxh.login6.struts.form.LoginForm" />

 </form-beans>

 <global-exceptions />

 <global-forwards />  <action-mappings>   <action attribute="loginForm" input="/login.jsp"    name="loginForm" path="/login" scope="request"    type="cn.mldn.lxh.login6.struts.action.LoginAction"    parameter="status">    <forward name="suc" path="/login.jsp"></forward>    <forward name="fal" path="/login.jsp"></forward>   </action>

 </action-mappings>

 <message-resources

  parameter="cn.mldn.lxh.login6.struts.ApplicationResources" /> </struts-config>20.修改ApplicationResources.properties的代码，实现错误输出。 # Resources for parameter 'cn.mldn.lxh.login6.struts.ApplicationResources' # Project SHLogin id.null = <li>\u7528\u6237ID\u4e0d\u80fd\u4e3a\u7a7a\uff01\uff01\uff01 password.null = <li>\u7528\u6237\u5bc6\u7801\u4e0d\u80fd\u4e3a\u7a7a\uff01\uff01\uff01 21.修改LoginForm.java,代码如下： /*  * Generated by MyEclipse Struts  * Template path: templates/java/JavaClass.vtl  */ package cn.mldn.lxh.login6.struts.form;

import javax.servlet.http.HttpServletRequest;

import org.apache.struts.action.ActionErrors;

import org.apache.struts.action.ActionForm; import org.apache.struts.action.ActionMapping; import org.apache.struts.action.ActionMessage;

/**

 * MyEclipse Struts Creation date: 03-12-2007  *   * XDoclet definition:  *   * @struts.form name="loginForm"  */ public class LoginForm extends ActionForm {  /*   * Generated fields   */

 /** password property */

 private String password;

 /** name property */

 private String name;

 /** id property */

 private String id;

 private String status;

 // 如果status的值为login，则表示要验证ID和password

 /*

  * Generated Methods   */

 /**

  * Method validate   *    * @param mapping   * @param request   * @return ActionErrors   */  public ActionErrors validate(ActionMapping mapping,    HttpServletRequest request) {   ActionErrors errors = new ActionErrors();   if ("login".equals(this.status)) {    if (this.id == null || "".equals(this.id)) {     errors.add("id", new ActionMessage("id.null"));    }    if (this.password == null || "".equals(this.password)) {     errors.add("password", new ActionMessage("password.null"));    }   }   return errors;  }

 /**

  * Method reset   *    * @param mapping   * @param request   */  public void reset(ActionMapping mapping, HttpServletRequest request) {   // TODO Auto-generated method stub  }

 /**

  * Returns the password.   *    * @return String   */  public String getPassword() {   return password;  }

 /**

  * Set the password.   *    * @param password   *            The password to set   */  public void setPassword(String password) {   this.password = password;  }

 /**

  * Returns the name.   *    * @return String   */  public String getName() {   return name;  }

 /**

  * Set the name.   *    * @param name   *            The name to set   */  public void setName(String name) {   this.name = name;  }

 /**

  * Returns the id.   *    * @return String   */  public String getId() {   return id;  }

 /**

  * Set the id.   *    * @param id   *            The id to set   */  public void setId(String id) {   this.id = id;  }

 public String getStatus() {

  return status;  }

 public void setStatus(String status) {

  this.status = status;  } }

22.修改LoginAction,代码如下：

* Generated by MyEclipse Struts  * Template path: templates/java/JavaClass.vtl  */ package cn.mldn.lxh.login6.struts.action;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import org.apache.struts.action.ActionForm;

import org.apache.struts.action.ActionForward; import org.apache.struts.action.ActionMapping; import org.apache.struts.actions.DispatchAction;

import cn.mldn.lxh.login6.factory.DAOFactory;

import cn.mldn.lxh.login6.struts.form.LoginForm; import cn.mldn.lxh.login6.vo.Person;

/**

 * MyEclipse Struts Creation date: 03-12-2007  *   * XDoclet definition:  *   * @struts.action path="/login" name="loginForm" input="/form/login.jsp"  *                scope="request" validate="true"  */ public class LoginAction extends DispatchAction {  /*   * Generated Methods   */

 /**

  * Method execute   *    * @param mapping   * @param form   * @param request   * @param response   * @return ActionForward   */  public ActionForward login(ActionMapping mapping, ActionForm form,    HttpServletRequest request, HttpServletResponse response) {   LoginForm loginForm = (LoginForm) form;   // 从ActionForm中取出要的内容   Person person = new Person();   person.setId(loginForm.getId());   person.setPassword(loginForm.getPassword());   boolean flag = false;      try {    flag = DAOFactory.getPersonDAOInstance().isLogin(person);   } catch (Exception e) {    e.printStackTrace();   }   request.setAttribute("flag", new Boolean(flag));   if (flag) {    // 如果成功，则将person对象传递过去    request.setAttribute("person", person);    return mapping.findForward("suc");   } else {    return mapping.findForward("fal");   }  } }

23.运行MyEclipse内的Tomcat。运行框架。完成！！！

本文转自施杨博客园博客，原文链接：http://www.cnblogs.com/shiyangxt/archive/2008/07/15/1242954.html，如需转载请自行联系原作者