Struts与Hibernate整合
1.项目简介
答:(1)Struts2+Hibernate4实现简单的CRUD案例;
(2)完成功能:后台登陆、学生表的增删改查;
(3)环境:struts2+Hibernate4+Mysql6.0;
注意:CRUD是指在做计算处理时的增加(Create)、读取查询(Read)、更新(Update)和删除(Delete)几个单词的首字母简写。主要被用在描述软件系统中数据库或者持久层的基本操作功能;
2.Struts与Hibernate整合
答:详见下图:(1)配置struts2过滤器:(2)struts2的核心jar包:(3)struts2的模板获取及配置:(4)Hibernate的核心jar包:(5)获取Hibernate的模板文件:(6)配置Hibernate主配置文件:(7)连接mysql用到的jar包:(8)测试jar包:
3.创建实体类
答:详见下图:
4.生成实体的对象关系映射文件
答:详见下图:
5.生成表结构
答:详见下图:
ServiceRegistry serviceRegistry = new StandardServiceRegistryBuilder().configure().build();
MetadataImplementor metadata = (MetadataImplementor) new MetadataSources( serviceRegistry ).buildMetadata();
new SchemaExport(metadata).create(true, true);
用junit来测试:
《模块开发之用户登录模块一》
6.项目的分层结构
答:详见下图:
7.创建自定义的SessionFactor类
答:
public class MyhibernateSeeionFactory {
private static SessionFactory sessionFactory;
private MyhibernateSeeionFactory(){
}
public static SessionFactory getSessionFactory(){
if(sessionFactory==null){
final StandardServiceRegistry registry = new StandardServiceRegistryBuilder().configure().build();
sessionFactory = new MetadataSources( registry ).buildMetadata().buildSessionFactory();
//Configuration configuration = new Configuration().configure();
//ServiceRegistry serviceRegistry = new StandardServiceRegistryBuilder().applySettings(configuration.getProperties()).build();
//sessionFactory = configuration.buildSessionFactory(serviceRegistry);
return sessionFactory;
}else{
return sessionFactory;
}
}
}
8.用户的业务逻辑接口和实现类
答:详见下图:
这是用户的业务逻辑接口
package service;
import entity.Users;
//用户业务逻辑接口
public interface UsersDAO {
//用户登入方法
public boolean usersLogin(Users u);
}
对应的实现类:
package service.impl;
import java.util.List;
import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.Transaction;
import db.MyhibernateSeeionFactory;
import entity.Users;
import service.UsersDAO;
public class UserDAOImpl implements UsersDAO{
@Override
public boolean usersLogin(Users u) {
Transaction tx = null;
String hql = "";
try {
Session session = MyhibernateSeeionFactory.getSessionFactory().getCurrentSession();
hql = "from Users u where username=? and password=? ";
tx = session.beginTransaction();
Query query = session.createQuery(hql);
query.setParameter(0, u.getUsername());
query.setParameter(1, u.getPassword());
List list = query.list();
tx.commit();
if(list.size()>0){
return true;
}else{
return false;
}
} catch (Exception e) {
e.printStackTrace();
return false;
}finally{
if(tx != null){
tx = null;
}
}
}
}
9.设计所有的Action的父类
答:
package action;
import javax.servlet.ServletContext;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import org.apache.struts2.interceptor.ServletRequestAware;
import org.apache.struts2.interceptor.ServletResponseAware;
import org.apache.struts2.util.ServletContextAware;
import com.opensymphony.xwork2.ActionSupport;
public class SuperAction extends ActionSupport implements ServletRequestAware,
ServletResponseAware, ServletContextAware {
/**
*
*/
private static final long serialVersionUID = 1L;
protected HttpServletRequest request;
protected HttpServletResponse response;
protected HttpSession session;
protected ServletContext application;
@Override
public void setServletContext(ServletContext application) {
this.application = application;
}
@Override
public void setServletResponse(HttpServletResponse response) {
this.response = response;
}
@Override
public void setServletRequest(HttpServletRequest request) {
this.request = request;
this.session = request.getSession();
}
}
10.设计用户Action类
答:详见下图:将用户action注册到struts2(第一个星号表示要找到动作的类,第二个表示表示这个类下的那个方法,表单的设计要和他匹配):
9.页面调用
答:
<form name="loginForm" action="<%=path%>/users/Users_login.action" method="post">
<!-- start of login form -->
<div id="welcome">
<span id="welcome-text">管 理 登 录</span>
</div>
<div id="user-name">
<span class="item">用户名:</span>
<span><input type="text" name="username" class="form-input"></span>
</div>
<div id="user-password">
<span class="item">密 码:</span>
<span class="input"><input type="password" name="password" class="form-input"></span>
</div>
<div id="button-group">
<input type="submit" class="btn" value="登录"/>
<input type="reset" class="btn" value="重置"/>
</div>
<div>
<s:fielderror/> <!-- 显示表单验证的出错信息 -->
</div>
<!-- end of form -->
</form>
11.完成显示登陆用户名和注销功能
答:
(1)显示登陆用户名:
public String login(){
session.setAttribute("loginUserName", user.getUsername());
UsersDAO udao = new UserDAOImpl();
if(udao.usersLogin(user)){
return "login_success";
}else{
return "login_failure";
}
}
在jsp页面上用el表达式:<div id="welcome">欢迎${sessionScope.loginUserName}使用本系统</div>
(2)注销功能:
public String logout(){
if(session.getAttribute("loginUserName")!=null){
session.removeAttribute("loginUserName");
}
return "logout_success";
}
在jsp页面上:<div id="logout"><a href="<%=path%>/users/Users_logout.action">安全退出</a></div>
12.完成表单验证功能
答:主要在登陆表单上用来显示报错的信息(可以交给客户端,这里是服务器端):
@Override
public void validate() {
if("".equals(user.getUsername().trim())){
this.addFieldError("usernameError", "用户名不能为空!");
}
if(user.getPassword().length()<6){
this.addFieldError("passwordError", "密码不能小于6位!");
}
}
由于上面这个方法对所有的方法进行验证所以可以用@SkipValidation跳出验证
但是要在jsp页面上显示信息就先引入struts2的表现库:<%@ taglib prefix="s" uri="/struts-tags"%> <s:fielderror/> <!-- 显示表单验证的出错信息 -->
《模块开发之学生管理模块二》
13.显示学生资料-设计学生业务逻辑接口
答:详见下图:
(1)添加测试数据
@Test
public void testSaveStudents(){
StandardServiceRegistry registry = new StandardServiceRegistryBuilder().configure().build();
SessionFactory sessionFactory = new MetadataSources( registry ).buildMetadata().buildSessionFactory();
Session session = sessionFactory.openSession();
session.beginTransaction();
Students s1 = new Students("S0000001","张三丰1","男",new Date(),"武当山");
Students s2 = new Students("S0000002","郭静","男",new Date(),"台湾岛");
Students s3 = new Students("S0000003","黄蓉","女",new Date(),"桃花岛");
session.save(s1);
session.save(s2);
session.save(s3);
session.getTransaction().commit();
// session.close();
}
(2)设计学生业务逻辑接口
package service;
import java.util.List;
import entity.Students;
//学生的业务逻辑借口
public interface StudentsDAO {
//查询所有学生信息
public List<Students> queryAllStudents();
//学生编号查询学生信息
public Students queryStudentsById(String sid);
//添加学生资料
public boolean addStudents(Students s);
//删除学生资料
public boolean deleteStudents(String sid);
//修改学生资料
public boolean updateStudents(Students s);
}
(2)设计学生业务逻辑接口实现类并实现查询方法:
@Override
public List<Students> queryAllStudents() {
List<Students> list = null;
String hql = "";
Session session = MyhibernateSeeionFactory.getSessionFactory().openSession();
try {
hql = " from Students ";
Query query = session.createQuery(hql);
session.beginTransaction();
list = query.list();
session.getTransaction().commit();
return list;
} catch (Exception e) {
e.printStackTrace();
session.getTransaction().commit();
return list;
}finally{
session.close();
}
}
测试上面的方法是否有问题:
@Test
public void testQueryAllStudents(){
StudentsDAO sdao = new StudentsDAOImpl();
List<Students> list = sdao.queryAllStudents();
for(int i = 0; i<list.size();i++){
System.out.println(list.get(i));
}
}
(4)设计学生Action类:
package action;
import java.util.List;
import com.opensymphony.xwork2.ModelDriven;
import entity.Students;
import service.StudentsDAO;
import service.impl.StudentsDAOImpl;
public class StudentsAction extends SuperAction implements ModelDriven<Students>{
private static final long serialVersionUID = 1L;
private Students students = new Students();
//查询所有学生资料的Action
public String query(){
StudentsDAO sdao = new StudentsDAOImpl();
List<Students> list = sdao.queryAllStudents();
if(list!=null&&list.size()>0){
session.setAttribute("students_list", list);
}else{
session.setAttribute("students_list",null);
}
return "query_success";
}
//删除学生的Action
public String delete(){
StudentsDAO sdao = new StudentsDAOImpl();
String sid = request.getParameter("sid");
sdao.deleteStudents(sid);
return "delete_success";
}
//添加学生的Action
public String add(){
StudentsDAO sdao = new StudentsDAOImpl();
sdao.addStudents(students);
return "add_success";
}
//修改学生资料的Action
public String modify(){
String sid = request.getParameter("sid");
StudentsDAO sdao = new StudentsDAOImpl();
Students s= sdao.queryStudentsById(sid);
session.setAttribute("modify_students", s);
return "modify_success";
}
//保存修改后的学生Action
public String save(){
StudentsDAO sdao = new StudentsDAOImpl();
sdao.updateStudents(students);
return "save_success";
}
@Override
public Students getModel() {
// TODO Auto-generated method stub
return students;
}
}
记得这个Action要在struts2的配置文档注册:
<package name="students" namespace="/students" extends="struts-default">
<action name="*_*" class="action.{1}Action" method="{2}">
<result name="query_success">/students/Students_query_success.jsp</result>
<result name="delete_success" type="chain">Students_query</result>
<result name="add_success">/students/Students_add_success.jsp</result>
<result name="modify_success">/students/Students_modify.jsp</result>
<result name="save_success">/students/Students_modify_success.jsp</result>
</action>
</package>
(5)页面调用:
当点击这里时执行遍历所有学生资料
{ level:2, name:"学生列表", ico:"images/icon_default.gif",link:"students/Students_query.action"}
这里记得假如struts2的标签库:<%@ taglib prefix="s" uri="/struts-tags"%>
<table class="default" width="100%">
<col width="10%">
<col width="20%">
<col width="5%">
<col width="20%">
<col width="30%">
<col width="15%">
<tr class="title">
<td>学号</td>
<td>姓名</td>
<td>性别</td>
<td>出生日期</td>
<td>地址</td>
<td>操作</td>
</tr>
<!-- 遍历开始 -->
<s:iterator value="#session.students_list" var="stu">
<tr class="list">
<td><s:property value="#stu.sid"/></td>
<td><a href="<%=path%>/students/Students_modify.action?sid=<s:property value="#stu.sid"/>"><s:property value="#stu.sname"/></a></td>
<td><s:property value="#stu.gender"/></td>
<td><s:date name="#stu.birthday" format="yyyy年MM月dd日"/></td>
<td><s:property value="#stu.address"/></td>
<td><a href="<%=path%>/students/Students_delete.action?sid=<s:property value="#stu.sid"/>" onclick="javascript: return confirm('真的要删除吗?');">删除</a></td>
</tr>
</s:iterator>
<!-- 遍历结束 -->
</table>
14.删除学生资料
答:详见下图:
(1)页面调用:<td><a href="<%=path%>/students/Students_delete.action?sid=<s:property value="#stu.sid"/>" onclick="javascript: return confirm('真的要删除吗?');">删除</a></td>
(2)实现删除学生业务逻辑代码:
@Override
public boolean deleteStudents(String sid) {
Session session = MyhibernateSeeionFactory.getSessionFactory().openSession();
try {
session.beginTransaction();
Students s = session.get(Students.class, sid);
session.delete(s);
session.getTransaction().commit();
return true;
} catch (Exception e) {
e.printStackTrace();
session.getTransaction().commit();
return false;
}finally{
session.close();
}
}
(3)编写学生Action:
//删除学生的Action
public String delete(){
StudentsDAO sdao = new StudentsDAOImpl();
String sid = request.getParameter("sid");
sdao.deleteStudents(sid);
return "delete_success";
}
记得注册chain表示连接一个动作,也就是说删除成功后再查询所有学生信息,相等页面刷新:
<result name="delete_success" type="chain">Students_query</result>
15.添加学生资料-实现添加学生资料业务逻辑
答:学生学号生成 方法
编写添加学生业务逻辑代码
编写添加学生action
页面调用
(1)学生学号生成 方法(很强大哦!):
private String getNewSid(){
Session session = MyhibernateSeeionFactory.getSessionFactory().openSession();
String hql = null;
String sid = null;
try {
session.beginTransaction();
hql = "select max(sid) from Students";
Query query = session.createQuery(hql);
sid = (String) query.uniqueResult();
if(sid==null"".equals(sid)){
sid = "S0000001";
}else{
String temp = sid.substring(1);
int i = Integer.parseInt(temp);
i++;
temp = String.valueOf(i);
int len = temp.length();
for(int j=0;j<7-len;j++){
temp = "0"+temp;
}
sid = "S"+temp;
}
session.getTransaction().commit();
return sid;
} catch (Exception e) {
e.printStackTrace();
session.getTransaction().commit();
return null;
}finally{
session.close();
}
}
(2)编写添加学生业务逻辑代码:
@Override
public boolean addStudents(Students s) {
Session session = MyhibernateSeeionFactory.getSessionFactory().openSession();
s.setSid(getNewSid());
try {
session.beginTransaction();
session.save(s);
session.getTransaction().commit();
return true;
} catch (Exception e) {
e.printStackTrace();
session.getTransaction().commit();
return false;
}finally{
session.close();
}
}
(3)编写添加学生action:
//添加学生的Action
public String add(){
StudentsDAO sdao = new StudentsDAOImpl();
sdao.addStudents(students);
return "add_success";
}
(4)页面调用 在struts2中注册:
<result name="add_success">/students/Students_add_success.jsp</result>
16.修改学生资料-实现页面显示要修改的学生资料
答:学生学号生成 方法
编写添加学生业务逻辑代码
编写添加学生action
编写修改jsp页面
页面调用 :
<td><a href="<%=path%>/students/Students_modify.action?sid=<s:property value="#stu.sid"/>"><s:property value="#stu.sname"/></a></td>
下面这个方法时页面显示学生资料
private String getNewSid(){
Session session = MyhibernateSeeionFactory.getSessionFactory().openSession();
String hql = null;
String sid = null;
try {
session.beginTransaction();
hql = "select max(sid) from Students";
Query query = session.createQuery(hql);
sid = (String) query.uniqueResult();
if(sid==null"".equals(sid)){
sid = "S0000001";
}else{
String temp = sid.substring(1);
int i = Integer.parseInt(temp);
i++;
temp = String.valueOf(i);
int len = temp.length();
for(int j=0;j<7-len;j++){
temp = "0"+temp;
}
sid = "S"+temp;
}
session.getTransaction().commit();
return sid;
} catch (Exception e) {
e.printStackTrace();
session.getTransaction().commit();
return null;
}finally{
session.close();
}
}
//修改学生资料的Action
public String modify(){
String sid = request.getParameter("sid");
StudentsDAO sdao = new StudentsDAOImpl();
Students s= sdao.queryStudentsById(sid);
session.setAttribute("modify_students", s);
return "modify_success";
}
在struts.xml中注册:
<result name="modify_success">/students/Students_modify.jsp</result>
jsp页面显示form表单:
<form name="modifyForm" action="<%=path%>/students/Students_save.action" method="post">
<table width="400" >
<tr>
<td width="30%">学号:</td>
<td><input type="text" name="sid" value='<s:property value="#session.modify_students.sid"/>' readonly="readonly"/></td>
</tr>
<tr>
<td width="30%">姓名:</td>
<td><input type="text" name="sname" value='<s:property value="#session.modify_students.sname"/>'/></td>
</tr>
<tr>
<td>性别:</td>
<td>
<s:if test='%{#session.modify_students.gender=="男"}'>
<input type="radio" name="gender" value="男" checked="checked"/>男
<input type="radio" name="gender" value="女"/>女
</s:if>
<s:else>
<input type="radio" name="gender" value="男" />男
<input type="radio" name="gender" value="女" checked="checked"/>女
</s:else>
</td>
</tr>
<tr>
<td>出生日期:</td>
<td><input name="birthday" type="text" id="control_date" size="20"
maxlength="10" onclick="new Calendar().show(this);" readonly="readonly"
value="<s:date name="#session.modify_students.birthday" format="yyyy-MM-dd"/>"
/>
</td>
</tr>
<tr>
<td>地址:</td>
<td><input type="text" name="address" value='<s:property value="#session.modify_students.address"/>'/></td>
</tr>
<tr>
<td colspan="2" align="center"><input class="button" type="submit" value="修改"></td>
</tr>
</table>
</form>
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