Struts框架和Hibernate框架的整合完整版介紹

1、Struts框架和Hibernate框架的整合1、首先寫一個(gè)student的實(shí)體類，命名為：StudentEntity.javapackage com.liu.student.entity;/* * 數(shù)據(jù)庫表的映射實(shí)體類文件 * author Calasin */public class StudentEntity private String s_id;/ 學(xué)號private String s_name;/ 姓名private int s_age;/ 年齡public String getS_id() return s_id;public void setS_id(String s_id)

2、this.s_id = s_id;public String getS_name() return s_name;public void setS_name(String s_name) this.s_name = s_name;public int getS_age() return s_age;public void setS_age(int s_age) this.s_age = s_age;public String toString() return "StudentEntity s_id=" + s_id + ", s_name=" + s_

3、name+ ", s_age=" + s_age + ""2、接著寫student實(shí)體類StudentEntity的配置文件：StudentEntity.hbm.xml<?xml version="1.0"?><!DOCTYPE hibernate-mapping PUBLIC "-/Hibernate/Hibernate Mapping DTD 3.0/EN""<hibernate-mapping><!- name屬性:對應(yīng)實(shí)體類的地址,table屬性:對應(yīng)數(shù)據(jù)庫的表

4、名稱(對應(yīng)數(shù)據(jù)庫表是什么名字，這里就是寫什么名字) -><class name="com.liu.student.entity.StudentEntity" table="student"><!- name對應(yīng)的是java，column對應(yīng)的是數(shù)據(jù)庫，但是一般兩個(gè)都寫成一樣，這樣可以避免出錯(cuò) name屬性:主鍵id,對應(yīng)的是java中的類中的屬性, column屬性:對應(yīng)數(shù)據(jù)庫中的主鍵id -><id name="s_id" column="s_id"><!- 主鍵生

5、成策略:uuid 32位隨機(jī)的字符串 -><generator class="uuid"></generator></id><!- name屬性:對應(yīng)java中的實(shí)體類屬性,column屬性:對應(yīng)的數(shù)據(jù)庫中的字段名稱,type屬性:表示java中的數(shù)據(jù)類型,默認(rèn)可以不添加 -><property name="s_name" column="s_name" type="java.lang.String"></property><pro

6、perty name="s_age" column="s_age"></property></class></hibernate-mapping>3、接下來寫實(shí)體類的Action：StudentActionpackage com.liu.student.action;import java.util.List;import com.liu.student.entity.StudentEntity;import com.liu.student.service.StudentService;import com.li

7、u.student.service.StudentServiceImpl;import com.opensymphony.xwork2.ActionSupport;/* * 與jsp頁面交互,完成數(shù)據(jù)傳遞 * author Calasin */public class StudentAction extends ActionSupport private List studentList;/創(chuàng)建一個(gè)List類型的學(xué)生列表private StudentService studentService = new StudentServiceImpl();private StudentEntity s

8、tudentEntity;/* * 查詢學(xué)生表的列表信息 * * return */public String studentList() studentList = studentService.getStudentList();return "studentList"public String updPage() studentEntity = studentService.getStudentEntity(studentEntity.getS_id();return "updPage"public String upd() studentServi

9、ce.update(studentEntity);return "upd"public List getStudentList() return studentList;public void setStudentList(List studentList) this.studentList = studentList;public StudentEntity getStudentEntity() return studentEntity;public void setStudentEntity(StudentEntity studentEntity) this.stude

10、ntEntity = studentEntity;4、接下來寫提供數(shù)據(jù)庫的接口interface: Dao.javapackage com.liu.dao;import java.util.List;/* * 提供數(shù)據(jù)庫接口 * author Calasin *1總體設(shè)計(jì)：設(shè)計(jì)Student對象及相關(guān)實(shí)體配置文件，工具類（得到一個(gè)Session對象）， * StudentDao接口（實(shí)現(xiàn)此接口即以操作數(shù)據(jù)庫）,下面代碼用"Dao"代替，編寫主配置文件，編寫測試類。 *2StudentDao的設(shè)計(jì)，最初打算設(shè)計(jì)成通用Object的操作， * 后來發(fā)現(xiàn)它的Session對象操作

11、都要傳遞一個(gè)對象，就設(shè)計(jì)成如下形式。內(nèi)容如下： */public interface Dao public List getList(String hql);/查看學(xué)生的列表信息public void add(Object obj);/增加public void update(Object obj);/修改public void delete(Object obj);/刪除public Object getObj(Class cls, String id);/獲取單一實(shí)體類對象5、接下來寫接口實(shí)現(xiàn)類的具體操作方法DaoImpl,實(shí)現(xiàn)Dao接口package com.liu.dao;import

12、 java.util.List;import org.hibernate.Query;import org.hibernate.Session;import org.hibernate.SessionFactory;import org.hibernate.cfg.Configuration;/* * Dao接口實(shí)現(xiàn)類,具體的操作,主要工作由Hibernate來完成 * 以下幾點(diǎn)需要注意：導(dǎo)包：Hibernate包，數(shù)據(jù)庫包；改寫配置文件；查詢方法的設(shè)計(jì)；注意事務(wù)，特別是“增刪改”要注意事務(wù)。 * author Calasin */public class DaoImpl implements

13、 Dao private Session session;public DaoImpl() / 提供一個(gè)空參構(gòu)造/ 首先構(gòu)建一個(gè)Configuration對象，可以調(diào)用configure()方法Configuration cfg = new Configuration().configure();/ 再用這個(gè)對象構(gòu)建一個(gè)SessionFactory對象，才是真正意義上可操控的實(shí)例對象SessionFactory sessionFactory = cfg.buildSessionFactory();/ 然后在用這個(gè)對象來構(gòu)建一個(gè)SessionFactory對象session = sessionF

14、actory.openSession();/ 增加public void add(Object obj) / TODO Auto-generated method stub/ 刪除public void delete(Object obj) / TODO Auto-generated method stub/* * 查詢列表方法(通用查詢) */public List getList(String hql) / TODO Auto-generated method stubtry session.beginTransaction();/ 開啟事務(wù)Query query = session.cr

15、eateQuery(hql);List list = query.list();session.getTransaction().commit();/ 提交return list; catch (Exception e) / TODO: handle exceptionreturn null; finally session.close();/* * 獲取單一實(shí)體類對象 */public Object getObj(Class cls, String id) try session.beginTransaction();Object object = session.get(cls, id);

16、session.getTransaction().commit();return object; catch (Exception e) / TODO: handle exceptionreturn null; finally session.close();/* * 修改單一實(shí)體類對象 */public void update(Object obj) / TODO Auto-generated method stubtry session.beginTransaction();session.update(obj);session.getTransaction().commit(); cat

17、ch (Exception e) / TODO: handle exception finally session.close();6、接下來寫service層：StudentServicepackage com.liu.student.service;import java.util.List;import com.liu.student.entity.StudentEntity;public interface StudentService public List getStudentList();/查public void add (StudentEntity studentEntity

18、);/增public void update(StudentEntity studentEntity);/改public void delete(StudentEntity studentEntity);/刪public StudentEntity getStudentEntity(String s_id);7、接下來寫service層：StudentServiceImplpackage com.liu.student.service;import java.util.List;import com.liu.dao.Dao;import com.liu.dao.DaoImpl;import c

19、om.liu.student.entity.StudentEntity;/* * 針對數(shù)據(jù)庫中student表的操作 * * author Calasin * */public class StudentServiceImpl implements StudentService private Dao dao = new DaoImpl();public void add(StudentEntity studentEntity) / TODO Auto-generated method stubpublic void delete(StudentEntity studentEntity) /

20、TODO Auto-generated method stubpublic StudentEntity getStudentEntity(String s_id) / TODO Auto-generated method stubStudentEntity studentEntity = (StudentEntity) dao.getObj(StudentEntity.class, s_id);return studentEntity;public List getStudentList() / TODO Auto-generated method stubString hql = "

21、;from StudentEntity"List list = dao.getList(hql);return list;public void update(StudentEntity studentEntity) / TODO Auto-generated method stubdao.update(studentEntity);8、配置文件config介紹（hibernate.cfg.xml和struts.xml）Hibernate.cfg.xml介紹如下：<!DOCTYPE hibernate-configuration PUBLIC"-/Hibernate/

22、Hibernate Configuration DTD 3.0/EN""<hibernate-configuration><session-factory><property name="hibernate.connection.url">jdbc:mysql:/localhost:3306/test?characterEncoding=utf-8</property><property name="hibernate.connection.driver_class">com

23、.mysql.jdbc.Driver</property><property name="hibernate.connection.username">root</property><property name="hibernate.connection.password">123456</property><!- 數(shù)據(jù)庫方言 -><property name="hibernate.dialect">org.hibernate.dialect.MySQ

24、LDialect</property><property name="hibernate.show_sql">true</property><mapping resource="com/liu/student/entity/StudentEntity.hbm.xml"/></session-factory></hibernate-configuration>Struts.xml介紹如下：<?xml version="1.0" encoding="UTF-8" ?&