MyEclipse-100下Struts21+Spring30+Hibernate33整合過程

1、2014年1月6日MyEclipse-10.0下Struts2.1+Spring3.0+Hibernate3.3整合過程新建web project：命名為SSH，做如下設(shè)置：新建后的工程目錄如下：然后開始添加SSH框架，這里我按照struts-spring-hibernate順序進(jìn)行添加。首先添加struts2.1支持：做如下設(shè)置后點(diǎn)next。選擇jar包，至少選擇下圖中選擇的兩個(gè)：然后添加Spring3.0支持，做如下設(shè)置：然后是添加hibernate3.3。為了在添加hibernate時(shí)，可以自動(dòng)在配置文件里加入數(shù)據(jù)庫的連接信息而不用再去手動(dòng)寫，需要在添加hibernate前配置一下數(shù)據(jù)庫

2、連接。我用的是mysql5.5，在mysql中新建數(shù)據(jù)庫ssh庫，然后新建兩張表：CREATE TABLE user ( id int(100) NOT NULL auto_increment, username varchar(500) NOT NULL, password varchar(500) NOT NULL, PRIMARY KEY (id);CREATE TABLE _log ( id int(100) NOT NULL auto_increment, msg varchar(500) NOT NULL, PRIMARY KEY (id);然后在MyEclipse里打開DB Br

3、owser視圖，在視圖下空白區(qū)右鍵新建一個(gè)數(shù)據(jù)庫連接： 做如下設(shè)置：接下來正式添加hibernate3.3：在下面的設(shè)置上選擇spring的配置文件，這樣hibernate就交給spring進(jìn)行管理：至此，SSH框架添加完成。工程結(jié)構(gòu)如下：至此，整合完畢，接下來創(chuàng)建一個(gè)項(xiàng)目測試一下。一、model層新建兩個(gè)實(shí)體類：User.java和Log.java，并生成相應(yīng)的get、set方法，然后使用Annotation注解相應(yīng)屬性與數(shù)據(jù)庫表中的字段的對應(yīng)關(guān)系：User.javapackage com.ecs610.model;import javax.persistence.Entity;import

4、 javax.persistence.GeneratedValue;import javax.persistence.Id;import javax.persistence.Table;EntityTable(name = user)public class User private int id;private String userName;private String password;IdGeneratedValuepublic int getId() return id;public void setId(int id) this.id = id;public String getU

5、serName() return userName;public void setUserName(String userName) this.userName = userName;public String getPassword() return password;public void setPassword(String password) this.password = password;Log.javapackage com.ecs610.model;import javax.persistence.Entity;import javax.persistence.Generate

6、dValue;import javax.persistence.Id;import javax.persistence.Table;EntityTable(name=_log)public class Log private int id;private String msg;IdGeneratedValuepublic int getId() return id;public void setId(int id) this.id = id;public String getMsg() return msg;public void setMsg(String msg) this.msg = m

7、sg;二、DAO層利用MyEclipse的反向工程功能創(chuàng)建DAO接口及實(shí)現(xiàn)（以創(chuàng)建UserDAO及UserDAOImpl為例，Log的使用在本文并未實(shí)現(xiàn)），在表上右鍵，反向工程： 會(huì)在com.ecs610.dao.impl下得到一個(gè)名為UserDAO.java的文件，并且該文件有錯(cuò)誤提示，引入U(xiǎn)ser，刪除冗余代碼，并將UserDAO.java的文件名rename為UserDAOImpl.java。然后在UserDAOImpl.java中提取出（extract）接口，將接口命名為UserDAO.java，并將UserDAO.java移動(dòng)到com.ecs610.dao包下： 項(xiàng)目結(jié)構(gòu)圖如下：Us

8、erDAO.javapackage com.ecs610.dao;import java.util.List;import com.ecs610.model.User;public interface UserDAO public abstract void save(User transientInstance);public abstract void delete(User persistentInstance);public abstract User findById(java.lang.Integer id);public abstract List findByUserName(

9、Object userName);public abstract List findAll();public abstract User merge(User detachedInstance);UserDAOImpl.javapackage com.ecs610.dao.impl;import java.util.List;import org.slf4j.Logger;import org.slf4j.LoggerFactory;import org.springframework.orm.hibernate3.support.HibernateDaoSupport;import com.

10、ecs610.dao.UserDAO;import com.ecs610.model.User;public class UserDAOImpl extends HibernateDaoSupport implements UserDAO private static final Logger log = LoggerFactory.getLogger(UserDAOImpl.class);public static final String PASSWORD = password;public static final String USER_NAME = userName;protecte

11、d void initDao() / do nothingpublic void save(User transientInstance) log.debug(saving User instance);try getHibernateTemplate().save(transientInstance);log.debug(save successful); catch (RuntimeException re) log.error(save failed, re);throw re;public void delete(User persistentInstance) log.debug(d

12、eleting User instance);try getHibernateTemplate().delete(persistentInstance);log.debug(delete successful); catch (RuntimeException re) log.error(delete failed, re);throw re;public User findById(java.lang.Integer id) log.debug(getting User instance with id: + id);try User instance = (User) getHiberna

13、teTemplate().get(com.ecs610.dao.impl.User, id);return instance; catch (RuntimeException re) log.error(get failed, re);throw re;public List findByProperty(String propertyName, Object value) log.debug(finding User instance with property: + propertyName+ , value: + value);try String queryString = from

14、User as model where model.+ propertyName + = ?;return getHibernateTemplate().find(queryString, value); catch (RuntimeException re) log.error(find by property name failed, re);throw re;public List findByUserName(Object userName) return findByProperty(USER_NAME, userName);public List findAll() log.deb

15、ug(finding all User instances);try String queryString = from User;return getHibernateTemplate().find(queryString); catch (RuntimeException re) log.error(find all failed, re);throw re;public User merge(User detachedInstance) log.debug(merging User instance);try User result = (User) getHibernateTempla

16、te().merge(detachedInstance);log.debug(merge successful);return result; catch (RuntimeException re) log.error(merge failed, re);throw re;三、Service層按照下圖的結(jié)構(gòu)新建Service層的類：UserService是接口類，UserServiceImpl是對應(yīng)的實(shí)現(xiàn)類。各類的內(nèi)容如下：UserService.java package com.ecs610.service;import com.ecs610.model.User;public interf

17、ace UserService public void add(User user);UserServiceImpl.java package com.ecs610.service.impl;import com.ecs610.dao.UserDAO;import com.ecs610.model.User;import com.ecs610.service.UserService;public class UserServiceImpl implements UserService private UserDAO userDAO;public UserDAO getUserDAO() ret

18、urn userDAO;public void setUserDAO(UserDAO userDAO) this.userDAO = userDAO;public void add(User user) this.userDAO.save(user);然后，修改applicationContext.xml文件，實(shí)現(xiàn)“注入”：applicationContext.xmlorg.hibernate.dialect.MySQLDialecttrueupdatecom.ecs610.model.Usercom.ecs610.model.Log關(guān)于“注入”的理解：關(guān)于ref=”userDAO”的理解是在

19、UserServiceImpl類中新建或者引用了名為userDAO的對象。在Spring下的含義是將id為userDAO的對象(bean)注入給了當(dāng)前類(對象)。（上文的.xml文件中的下劃線為橫線的userDAO為同一個(gè)對象，即同一個(gè)bean）“注入”：配置文件指定了當(dāng)前bean新建了哪一個(gè)對象（指定了當(dāng)前bean的名稱）、該對象屬于哪個(gè)類、該對象是否有set方法、引用了哪個(gè)bean等信息，這樣是一種靈活的方式，通過不同的配置可以實(shí)現(xiàn)不同的功能（通過引用不同的bean）。然后新建類UserServiceImpl的JUnit test類。首先新建一個(gè)和目錄src同一級(jí)別的Source Folder，起名為test，用于存放測試類。然后在UserServiceImpl.java類上單擊右鍵newother：然后將UserServiceImplTest.java的內(nèi)容修改為如下：UserServiceImplTest.javapa