實踐hibernate的應用——struts2+hibernate的簡單學生資訊管理
阿新 • • 發佈：2019-02-16
struts2+hibernate的簡單學生資訊管理，沒有用很好的介面，目的主要是為了實踐一下hibernate框架的學習，深入瞭解hibernate框架。
下面是專案的目錄：
配置檔案hibernate.cfg.xml
struts.xml<?xml version='1.0' encoding='UTF-8'?> <!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd"> <!-- Generated by MyEclipse Hibernate Tools. --> <hibernate-configuration> <session-factory> <property name="dialect">org.hibernate.dialect.MySQLInnoDBDialect</property> <property name="connection.url">jdbc:mysql://localhost:3306/stu</property> <property name="connection.username">root</property> <property name="connection.password">123456</property> <property name="connection.driver_class">com.mysql.jdbc.Driver</property> <!-- 顯示sql語句 --> <property name="hibernate.show_sql">true </property> <property name="format_sql">true</property><!-- 讓輸出的sql語句格式化 --> <mapping resource="PO/Stuinfo.hbm.xml"/> </session-factory> </hibernate-configuration>
對映檔案Stuinfo.hbm.xml<!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN" "http://struts.apache.org/dtds/struts-2.0.dtd"> <struts> <!-- Configuration for the default package. --> <package name="default" extends="struts-default"> <action name="lookMessageAction" class="studentAction.LookMessageAction"> <result name="success">/student/lookMessage.jsp</result> <result name="input">/student/index.jsp</result> </action> <action name="addMessageAction" class="studentAction.AddMessageAction"> <result name="success" type="chain">lookMessageAction</result> <result name="input">/student/addMessage.jsp</result> </action> <action name="findMessageAction" class="studentAction.FindMessageAction"> <result name="success">/student/updateMessage.jsp</result> <result name="input">/student/findMessage.jsp</result> </action> <action name="updateMessageAction" class="studentAction.UpdateMessageAction"> <result name="success" type="chain">lookMessageAction</result> <result name="input">/student/updateMessage.jsp</result> </action> <action name="deleteMessageAction" class="studentAction.DeleteMessageAction"> <result name="success" type="chain">lookMessageAction</result> <result name="input">/student/deleteMessage.jsp</result> </action> </package> </struts>
<?xml version="1.0"?> <!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd"> <!-- Generated 2011-12-9 12:17:31 by Hibernate Tools 3.2.1.GA --> <hibernate-mapping> <class name="PO.Stuinfo" table="stuinfo" catalog="stu"> <id name="id" type="string"> <column name="id" length="20" /> <generator class="assigned" /> </id> <property name="name" type="string"> <column name="name" length="20" not-null="true" /> </property> <property name="sex" type="string"> <column name="sex" length="5" not-null="true" /> </property> <property name="age" type="int"> <column name="age" not-null="true" /> </property> <property name="weight" type="float"> <column name="weight" precision="10" scale="0" not-null="true" /> </property> </class> </hibernate-mapping>
StudentDao.java檔案
package Dao;
import SessionFactory.HibernateSessionFactory;
import PO.Stuinfo;
import java.util.List;
import javax.swing.JOptionPane;
import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.Transaction;
public class StudentDao {
private Transaction transaction;
private Session session;
private Query query;
public StudentDao(){
}
public boolean saveInfo(Stuinfo info){
try{
session=HibernateSessionFactory.getSession();
transaction=session.beginTransaction();
session.save(info);
transaction.commit();
session.close();
return true;
}catch(Exception e){
message("saveInfo.error:"+e);
e.printStackTrace();
return false;
}
}
public List<Stuinfo> findInfo(String type,Object value){
session=HibernateSessionFactory.getSession();
if(session==null){
System.out.println("dao中session是空的");
}
try{
transaction=session.beginTransaction();
String queryString="from Stuinfo as model where model."+type+"="+value;
//System.out.println(queryString);
query=session.createQuery(queryString);
// query.setParameter(0, value);
List<Stuinfo> list=query.list();
transaction.commit();
session.close();
return list;
}catch(Exception e){
message("findInfo.error:"+e);
e.printStackTrace();
return null;
}
}
public List<Stuinfo> findAllInfo(){
session=HibernateSessionFactory.getSession();
try{
transaction=session.beginTransaction();
String queryString="from Stuinfo";
query=session.createQuery(queryString);
List<Stuinfo> list=query.list();
transaction.commit();
session.close();
return list;
}catch(Exception e){
message("findInfo.error:"+e);
e.printStackTrace();
return null;
}
}
public boolean deleteInfo(String id){
try{
session=HibernateSessionFactory.getSession();
transaction=session.beginTransaction();
Stuinfo info=new Stuinfo();
info=(Stuinfo)session.get(Stuinfo.class, id);
session.delete(info);
transaction.commit();
session.close();
return true;
}catch(Exception e){
message("deleteInfo.error:"+e);
e.printStackTrace();
return false;
}
}
public boolean updateInfo(Stuinfo info){
try{
session=HibernateSessionFactory.getSession();
transaction=session.beginTransaction();
session.update(info);
transaction.commit();
session.close();
return true;
}catch(Exception e){
message("updateInfo.error:"+e);
e.printStackTrace();
return false;
}
}
public void message(String mess){
int type=JOptionPane.YES_NO_OPTION;
String title="提示資訊";
JOptionPane.showMessageDialog(null, mess, title, type);
}
}
模組一：查詢所有的的學生資訊
查詢資訊主要是進入lookMessageAction，查詢資料庫：
<span style="font-size:24px;"> <action name="lookMessageAction" class="studentAction.LookMessageAction">
<result name="success">/student/lookMessage.jsp</result>
<result name="input">/student/index.jsp</result>
</action></span>LookMessageAction.java
public String execute() throws Exception{
request=ServletActionContext.getRequest();
StudentDao dao=new StudentDao();
//查詢所有資訊
List<Stuinfo> list=dao.findAllInfo();
//把資訊放在session裡面
request.getSession().setAttribute("count", list.size());
request.getSession().setAttribute("allInfo", list);
message="success";
return message;
}
StudentDao.java中的部分：
<strong> </strong> public List<Stuinfo> findAllInfo(){
session=HibernateSessionFactory.getSession();
try{
transaction=session.beginTransaction();
String queryString="from Stuinfo";//HQL語言
query=session.createQuery(queryString);//建立query物件
List<Stuinfo> list=query.list();
transaction.commit();
session.close();
return list;
}catch(Exception e){
message("findInfo.error:"+e);
e.printStackTrace();
return null;
}
}模組二：新增學生資訊
新增學生資訊，點選確定時通過form表單提交addMessageAction，addMessageAction
處理完成之後伺服器跳轉到lookMessageAction。即新增成功之後馬上可檢視所有學生資訊。
<action name="addMessageAction" class="studentAction.AddMessageAction">
<result name="success" type="chain">lookMessageAction</result>
<result name="input">/student/addMessage.jsp</result>
</action>package studentAction;
import Dao.StudentDao;
import PO.Stuinfo;
import com.opensymphony.xwork2.ActionSupport;
import java.util.List;
import javax.swing.JOptionPane;
public class AddMessageAction extends ActionSupport{
private String id;
private String name;
private String sex;
private int age;
private float weight;
private String message="input";
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 getSex() {
return sex;
}
public void setSex(String sex) {
this.sex = sex;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
public float getWeight() {
return weight;
}
public void setWeight(float weight) {
this.weight = weight;
}
public void validate(){
if(this.getId()==null||this.getId().length()==0){
addFieldError("id","學號不允許為空!");
}else{
StudentDao dao=new StudentDao();
List<Stuinfo> list=dao.findInfo("id", this.getId());
if(!list.isEmpty()){
addFieldError("id","學號已存在!");
}
}
if(this.getName()==null||this.getName().length()==0){
addFieldError("name","姓名不允許為空!");
}
if(this.getAge()>130){
addFieldError("age","請認真核實年齡！");
}
if(this.getWeight()>500){
addFieldError("weight","請認真核實體重！");
}
}
public String execute() throws Exception{
StudentDao dao=new StudentDao();
//把持久化物件儲存在mysql中，此處用到hibernate框架
boolean save=dao.saveInfo(info());
if(save){
message="success";
}
return message;
}
public Stuinfo info(){
Stuinfo info=new Stuinfo();
info.setId(this.getId());
info.setName(this.getName());
info.setSex(this.getSex());
info.setAge(this.getAge());
info.setWeight(this.getWeight());
return info;
}
public void message(String mess){
int type=JOptionPane.YES_NO_OPTION;
String title="提示資訊";
JOptionPane.showMessageDialog(null, mess, title, type);
}
}
public boolean saveInfo(Stuinfo info){
try{
session=HibernateSessionFactory.getSession();
transaction=session.beginTransaction();
session.save(info);
transaction.commit();
session.close();
return true;
}catch(Exception e){
message("saveInfo.error:"+e);
e.printStackTrace();
return false;
}
}模組三：修改學生資訊
修改學生資訊，首先要選擇序號，點選確定之後，進入修改介面
<span style="font-size:24px;"><action name="findMessageAction" class="studentAction.FindMessageAction">
<result name="success">/student/updateMessage.jsp</result>
<result name="input">/student/findMessage.jsp</result>
</action></span> public String execute() throws Exception{
request=ServletActionContext.getRequest();
StudentDao dao=new StudentDao();
//通過id查詢要修改的學生物件
List<Stuinfo> list=dao.findInfo("id", this.getId());
request.getSession().setAttribute("oneInfo", list);
message="success";
return message;
}在更新頁面填好資訊後，通過form提交到updateMessageAction,updateMessageAction更新成功後伺服器跳轉到lookMessageAction
<action name="updateMessageAction" class="studentAction.UpdateMessageAction">
<result name="success" type="chain">lookMessageAction</result>
<result name="input">/student/updateMessage.jsp</result>
</action> public String execute() throws Exception{
StudentDao dao=new StudentDao();
boolean update=dao.updateInfo(info());//更新資料庫
if(update){
message="success";
}
return message;
}
public Stuinfo info(){
Stuinfo info=new Stuinfo();
info.setId(this.getId());
info.setName(this.getName());
info.setSex(this.getSex());
info.setAge(this.getAge());
info.setWeight(this.getWeight());
return info;
} public boolean updateInfo(Stuinfo info){
try{
session=HibernateSessionFactory.getSession();
transaction=session.beginTransaction();
session.update(info);
transaction.commit();
session.close();
return true;
}catch(Exception e){
message("updateInfo.error:"+e);
e.printStackTrace();
return false;
}
}模組四：刪除學生資訊
刪除學生資訊也是一樣的，先根據學號查詢到學生資訊，變成持久化物件然後在刪除
<span style="font-size:24px;"> <action name="deleteMessageAction" class="studentAction.DeleteMessageAction">
<result name="success" type="chain">lookMessageAction</result>
<result name="input">/student/deleteMessage.jsp</result>
</action> </span>public String execute() throws Exception{
StudentDao dao=new StudentDao();
//從資料庫中刪除
boolean del=dao.deleteInfo(this.getId());
if(del){
message="success";
}
return message;
} public boolean deleteInfo(String id){
try{
session=HibernateSessionFactory.getSession();
transaction=session.beginTransaction();
Stuinfo info=new Stuinfo();
//先獲得持久化物件
info=(Stuinfo)session.get(Stuinfo.class, id);
//再持久化物件
session.delete(info);
transaction.commit();
session.close();
return true;
}catch(Exception e){
message("deleteInfo.error:"+e);
e.printStackTrace();
return false;
}
}