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简单的学生信息管理系统

2016-10-07 23:29 316 查看
Struts2+hibernate实现用户登录和增删改查案例

开发工具MyEclipse 10.7.1

创建一个项目 web项目project。

部署好Struts2的开发环境：

     1、引入需要的类库文件 jar

     2、添加struts2的配置文件 struts.xml    //src路径  ：classespath:

     3、在web.xml添加启动struts2 MVC框架的过滤器

     4、添加Hibernate所依赖的jar文件

         (注意：如果Hibernate添加的jar文件与struts2添加jar文件 名称完全一致(只需其中之一)(版本不一致保留高本版) )

5、同样添加hibernate的配置文件

   Classespath:  src路径下面

6、需要添加对应数据库操作的驱动文件jar

在此基础上 对 admin这个类 完成 增删改查的操作。

     在src下搭建开发框架，如图所示：



项目开始：

目录：

第1章 Struts2与Hibernate整合

1-3 Struts2与Hibernate整合

1）添加核心类库，注意：相同的jar包存在不同版本时，删去低版本

2）struts.xml

<struts>
<package name="default" namespace="/" extends="struts_default">
</package>
</struts>
</pre><pre code_snippet_id="1647048" snippet_file_name="blog_20160414_3_1928630" name="code" class="html">


3）hibernate.cfg.xml
<hibernate-configuration>
<session-factory>
<property name="dialect">org.hibernate.dialect.MySQLDialect</property>
<property name="connection.url">jdbc:mysql://localhost:3306/test</property>
<property name="connection.username">root</property>
<property name="connection.password">123456</property>
<property name="connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="show_sql">true</property>
<property name="format_sql">true</property>
<property name="hbm2ddl.auto">update</property>
<property name="hibernate.current_session_context_class">thread</property>

<mapping resource="entity/Students.hbm.xml"/>
<mapping resource="entity/Users.hbm.xml"/>
</session-factory>
</hibernate-configuration>

1-4 创建实体类 

1)创建entity包

2）Students.java

package entity;
import java.util.Date;
public class Students {
private String sid;
private String sname;
private String gender;
private Date birthday;
private String address;

@Override
public String toString() {
return "Students [address=" + address + ", birthday=" + birthday
+ ", gender=" + gender + ", sid=" + sid + ", sname=" + sname
+ "]";
}
public Students() {

}
public Students(String sid, String sname, String gender, Date birthday,
String address) {
super();
this.sid = sid;
this.sname = sname;
this.gender = gender;
this.birthday = birthday;
this.address = address;
}
public String getSid() {
return sid;
}
public void setSid(String sid) {
this.sid = sid;
}
public String getSname() {
return sname;
}
public void setSname(String sname) {
this.sname = sname;
}
public String getGender() {
return gender;
}
public void setGender(String gender) {
this.gender = gender;
}
public Date getBirthday() {
return birthday;
}
public void setBirthday(Date birthday) {
this.birthday = birthday;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
}


3）Users.java
package entity;
public class Users {
private int uid;
private String username;
private String password;

public Users() {

}

public Users(int uid, String username, String password) {
this.uid = uid;
this.username = username;
this.password = password;
}

public int getUid() {
return uid;
}

public void setUid(int uid) {
this.uid = uid;
}

public String getUsername() {
return username;
}

public void setUsername(String username) {
this.username = username;
}

public String getPassword() {
return password;
}

public void setPassword(String password) {
this.password = password;
}
}

1-5 生成实体类的对象关系映射文件

1）Students.hbm.xml

<?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="entity.Students" table="students" catalog="test">
<id name="sid" type="java.lang.String" column="SID" length="8">
<generator class="assigned" />
</id>
<property name="sname" type="java.lang.String" />
<property name="gender" type="java.lang.String" />
<property name="birthday" type="date" />
<property name="address" type="java.lang.String" />

</class>
</hibernate-mapping>


2）Users.hbm.xml
<?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="entity.Users" table="USERS" >
<id name="uid" type="java.lang.Integer">
<generator class="native" />
</id>
<property name="username" type="java.lang.String" />
<property name="password" type="java.lang.String" />

</class>
</hibernate-mapping>

3)配置hibernate.cfg.xml
<mapping resource="entity/Students.hbm.xml"/>
<mapping resource="entity/Users.hbm.xml"/>

1-6 生成表结构

//创建配置对象
Configuration cfg = new Configuration().configure();
SchemaExport export = new SchemaExport(cfg);
export.create(true,true);

第2章 用户登录模块

2-1 本章简介

项目分层：
模型层：实体层（entity）、数据库层(db)、接口层(service)、接口实现层(serviceImpl)
控制层：动作层(action)
视图层：JSP页面

2-2 创建用户自定义的SessionFactory类

可使用自带

2-3 用户业务逻辑接口和类

1)UsersDao.java 接口

public interface UsersDao {
public boolean usersLogin(Users u);
}


2)UsersDaoImpl.java 类
package serviceImpl;
public class UsersDaoImpl implements UsersDao {

public boolean usersLogin(Users u) {
//事务对象
Transaction tx=null;
String sql="";
try{
Session session = HibernateSessionFactory.getSession();
tx = session.beginTransaction();
sql="from Users  where username=? and password=? ";
Query query=session.createQuery(sql);
query.setParameter(0, u.getUsername());
query.setParameter(1,u.getPassword());
List<Users> list=query.list();
tx.commit();//提交事务
if(list.size()>0){
return true;
}else{
return false;
}

}catch (Exception e) {
e.printStackTrace();
return false;
}finally{
if(tx!=null){
tx=null;
}
}
}
}


3)TestUserDaoImpl.java 测试类
package test.userImpl;
public class TestUserDaoImpl {
@Test
public void testUserLogin(){
Users u=new Users(1,"张三","123");
UsersDaoImpl udao=new UsersDaoImpl();
Assert.assertEquals(true, udao.usersLogin(u));
}
}

2-4 设计所有Action的父类

1）继承ActionSupport

2）为了获得常用的内置对象采用耦合IOC方式注入属性

SuperAction.java

public class SuperAction extends ActionSupport implements ServletContextAware,
ServletRequestAware, ServletResponseAware ,SessionAware{
private static final long serialVersionUID = 1L;
protected ServletContext context;
protected HttpServletRequest request;
protected HttpServletResponse response;
protected Map<String,Object> session;

public void setServletContext(ServletContext context) {
this.context=context;
}

public void setServletRequest(HttpServletRequest request) {
this.request=request;
}

public void setServletResponse(HttpServletResponse response) {
this.response=response;
}

public void setSession(Map<String, Object> session) {
this.session = session;
}
}

2-5 设计用户Action类 

strus2接受表单数据的方式

三种：普通属性、领域对象、模型驱动

1）UsersAction.java
package action;
import com.opensymphony.xwork2.ModelDriven; //模型驱动
import entity.Users;
public class UsersAction extends SuperAction implements ModelDriven<Users>{
private static final long serialVersionUID = 4317500994450323565L;
private Users user=new Users();

//用户登录动作
public String login(){
UsersDao udao=new UsersDaoImpl();
if(udao.usersLogin(user)){
return "login_success";
}else{
return "login_failure";
}
}

public Users getModel() {
return this.user;
}
}

2)struts.xml  配置映射
<package name="users" namespace="/users" extends="default">
<action name="*_*" class="action.{1}Action" method="{2}">
<result name="login_success">/users/users_login_success.jsp</result>
<result name="login_failure">/users/users_login.jsp</result>
</action>
</package>

2-6 页面调用

<form name="loginForm" action="<%=path%>/users/Users_login.action" method="post">

2-7 完成显示登录成功用户名和注销功能

1）在action实现attribute保存，以及注销动作

//用户登录动作
public String login(){
UsersDao udao=new UsersDaoImpl();

if(udao.usersLogin(user)){
//在session中保存登录成功的用户名
session.put("loginUserName", user.getUsername());
return "login_success";
}else{
return "login_failure";
}
}

@SkipValidation
//用户注销操作,本操作不进行表单输入验证
public String logout(){
if(session.get("loginUserName")!=null){
session.remove("loginUserName");
}
return "logout_success";
}

2)struts.xml  添加映射
<result name="logout_success">/users/users_login.jsp</result>

3）users_login_success.jsp 登录成功页面
<div id="welcome">欢迎${sessionScope.loginUserName}使用本系统</div>
<div id="logout"><a href="<%=path%>/users/Users_logout.action">安全退出</a></div>

2-8 完成表单验证功能

1）在action实现ActionSupport的validate()方法

@Override
public void validate() {
if("".equals(user.getUsername().trim()) ){
this.addFieldError("usernameError", "用户名不能为空!");
}
if(user.getPassword().trim().length()<6){
this.addFieldError("userpasswordError", "密码不能小于6位!");
}
}

2）对不进行验证的方法上加注解@SkipValidatio
@SkipValidation
//用户注销操作,本操作不进行表单输入验证
public String logout(){}

3)Struts.xml
<package name="users" namespace="/users" extends="struts-default">
<action name="*_*" class="action.{1}Action" method="{2}">
<result name="login_success">/users/Users_login_success.jsp</result>
<result name="login_failure">/users/Users_login.jsp</result>
<result name="logout_success">/users/Users_login.jsp</result>
<result name="input">/users/Users_login.jsp</result> <!--添加-->
</action>
</package>

4）users_login.jsp 显示错误信息
<%@ taglib prefix="s" uri="/struts-tags"%>

<div>
<s:fielderror/> <!-- 显示表单验证的出错信息 -->
</div>

第3章 学生信息管理模块

3-1 显示学生资料——准备 

为数据库输入数据

@Test
public void testSaveStudents(){
Session session=HibernateSessionFactory.getSessionFactory().openSession();
Transaction tx=session.beginTransaction();

Students s1=new Students("800001","张三丰","男",new Date(),"武当山");
Students s2=new Students("800002","郭靖","男",new Date(),"桃花岛");
Students s3=new Students("800003","黄蓉","女",new Date(),"桃花岛");

session.save(s1);
session.save(s2);
session.save(s3);

tx.commit();
session.close();
}

3-2 显示学生资料-设计学生业务逻辑接口

增删改查

//学生业务逻辑接口
public interface StudentsDao {
//查询所有
public List<Students> queryAllStudents();
//查询单个
public Students queryStudentsBySid(String sid);
//增
public boolean addStudents(Students s);
//改
public boolean updateStudents(Students s);
//删
public boolean deleteStudents(String sid);
}

3-3 显示学生资料-实现显示学生资料业务逻辑

//查询所有
public List<Students> queryAllStudents() {
Transaction tx=null;
List<Students> list=null;
String sql="";
try{
Session session=HibernateSessionFactory.getSessionFactory().openSession();
tx=session.beginTransaction();

sql="from Students ";
Query query=session.createQuery(sql);

list=query.list();
tx.commit();
}catch(Exception ex){
ex.printStackTrace();
tx.commit();
}finally{
if(tx!=null){
tx=null;
}
}
return list;
}

3-4 显示学生资料-实现显示学生资料Action 

1）Students.xml

public String query(){
StudentsDao sDao=new StudentsDaoImpl();
List<Students> list=sDao.queryAllStudents();
if(list!=null && list.size()>0){
session.setAttribute("stundesList", list);
}
return "Students_query_success";


2）struts.xml
<package name="students" namespace="/stundents" extends="default">
<action name="*_*" class="action.{1}Action" method="{2}">
<result name="Students_query_success">/stundents/Students_query_success.jsp</result>
</action>
</package>

3-5 显示学生资料-页面调用与数据展现

<%@ taglib prefix="s" uri="/struts-tags"%>

<!-- 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 -->

3-6 删除学生资料

1)StudentsDaoImpl.java

public boolean deleteStudents(String sid) {
Transaction tx=null;
List<Students> list=null;
String sql="";
try{
Session session=HibernateSessionFactory.getSessionFactory().openSession();
tx=session.beginTransaction();

Students s=(Students) session.get(Students.class,sid);
session.delete(s);

tx.commit();
return true;
}catch(Exception ex){
ex.printStackTrace();
tx.commit();
return false;
}finally{
if(tx!=null){
tx=null;
}
}
}


2)StudentsAction.java
public String delete(){
StudentsDao sDao=new StudentsDaoImpl();
String sid= request.getParameter("sid");
sDao.deleteStudents( sid );
return "delete_success";
}

3)Struts.xml
<package name="students" namespace="/students" extends="default">
<action name="*_*" class="action.{1}Action" method="{2}">
<result name="query_success">/students/Students_query_success.jsp</result>
<result name="delete_success" type="redirect">Students_query.action</result>
</action>
</package>

4)Students_query_success.jsp 
<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>

3-7 添加学生资料-实现步骤和界面原型设计

3-8 添加学生资料-学生学号生成方法 

1)StudentsDaoImpl.java

public String getNewSid(){
Transaction tx=null;
String sid=null;
String sql="";
try{
Session session=HibernateSessionFactory.getSessionFactory().openSession();
tx=session.beginTransaction();

sql="select max(sid) from Students ";
Query query=session.createQuery(sql);

sid=(String) query.uniqueResult();

if(sid==null || "".equals(sid.trim())){
sid="S00001";
}else{
String temp=sid.substring(1); //取后几位
int tempI=Integer.parseInt(temp)+1; //int + 1
temp=String.valueOf(tempI); //转成string
int len=temp.length(); //数字位数
for(int i=0;i<5-len;i++){
temp="0"+temp;
}

sid="S"+temp;
}

tx.commit();
}catch(Exception ex){
ex.printStackTrace();
tx.commit();
}finally{
if(tx!=null){
tx=null;
}
}
return sid;
}


3-9 添加学生资料-实现添加学生资料业务逻辑
2)StudentsDaoImpl.java

public boolean addStudents(Students s) {
s.setSid(getNewSid());
Transaction tx=null;
String sql="";
try{
Session session=HibernateSessionFactory.getSessionFactory().openSession();
tx=session.beginTransaction();

session.save(s);

tx.commit();
}catch(Exception ex){
ex.printStackTrace();
tx.commit();
return false;
}finally{
if(tx!=null){
tx=null;
}
}

return true;
}


3) StudentsAction.java
public String add(){
StudentsDao sDao=new StudentsDaoImpl();

try {
Students s=new Students();
s.setSname(request.getParameter("sname"));
s.setGender(request.getParameter("gender"));
SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd");
Date birthday;
birthday = sdf.parse(request.getParameter("birthday"));
s.setBirthday(birthday);
s.setAddress(request.getParameter("address"));

sDao.addStudents(s);
} catch (ParseException e) {
e.printStackTrace();
}
return "add_success";
}



4)Struts.xml
<result name="add_success" >/students/Students_add_success.jsp</result>

5)Students_query_success.jsp
<a href="<%=path%>/students/Students_add.jsp">添加学生</a>

6)Students_add.jsp

  
<form name="addForm" action="<%=path%>/students/Students_add.action" method="post">


7)Students_add_success.jsp
<a href="<%=path%>/students/Students_add.jsp">继续添加？</a>

3-10 修改学生资料-实现步骤和界面原型演示

3-11 修改学生资料-实现页面显示要修改的生资料

1)StudentsDaoImpl.java

public Students queryStudentsBySid(String sid) {
Transaction tx=null;
Students s=null;
String sql="";
try{
Session session=HibernateSessionFactory.getSessionFactory().openSession();
tx=session.beginTransaction();

sql="from Students where sid=?";
Query query=session.createQuery(sql);
query.setParameter(0,sid);

s=(Students) query.uniqueResult();
tx.commit();
}catch(Exception ex){
ex.printStackTrace();
tx.commit();
}finally{
if(tx!=null){
tx=null;
}
}
return s;
}

2)StudentsAction.java
public String modify(){
StudentsDao sDao=new StudentsDaoImpl();
Students s=sDao.queryStudentsBySid(request.getParameter("sid"));
session.put("modify_students", s);
return "modify_success";
}

3)Struts.xml
<result name="modify_success" >/students/Students_modify.jsp</result> 
4)Students_query_success.jsp

<td><a href="<%=path%>/students/Students_modify.action?sid=<s:property value="#stu.sid"/>">


3-12 修改学生资料-实现修改学生资料action和页面调用测试 

5)StudentsAction.java

public String save(){
StudentsDao sDao=new StudentsDaoImpl();
try {
Students s=new Students();
s.setSid(request.getParameter("sid"));
s.setSname(request.getParameter("sname"));
s.setGender(request.getParameter("gender"));
SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd");
Date birthday;
birthday = sdf.parse(request.getParameter("birthday"));
s.setBirthday(birthday);
s.setAddress(request.getParameter("address"));

sDao.addStudents(s);
} catch (ParseException e) {
e.printStackTrace();
}
return "save_success";
}


6)Struts.xml
<result name="save_success" >/students/Students_modify_success.jsp</result>



7)Students_modify.jsp
<form name="modifyForm" action="<%=path%>/students/Students_save.action" method="post">
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