Spring+hibernate+DWR整合

首先，建一个web project,然后添加对hibernate和spring的支持，我们使用的是hibernate3.1和spring2.0,然后导入dwr.jar和commons-pool-1.3.jar(不知道myeclipse怎么搞的，添加Spring功能支持的时候就有了commons-dbcp.jar，居然没有其依赖的commons-pool-x.jar，只好单独添加了，另外，需要将Spring2.0 AOP Liberaries里的asm2.2.3.jar删除，因为好像和Hiberate中的生成代理用的asm.jar冲突，我把Spring2.0 AOP Liberaries排到最后仍然有冲突，所以只好删掉了，不知道大家遇到过这种情况么)。我们使用myeclise自带的Derby数据库，在里面建一个表BOOK：
ID bigint primary key,autoincrement
NAME varchar(20)
ISBM varchar(20)
AUTHOR varchar(15)
然后利用myeclipse的hibernate反向工程生成领域模型：Book.java, DAO:BookDAO.jar, Book 的映射文件Book.hbm.xml：
生成的代码及配置文件如下:
Book.java:


package edu.jlu.fuliang.domain;




/** *//**


* Book generated by MyEclipse Persistence Tools


*/






public class Book implements java.io.Serializable {




// Fields




private Long id;


private String name;


private String isbm;


private String author;




// Constructors






/** *//** default constructor */




public Book() {


}






/** *//** minimal constructor */




public Book(Long id, String name, String isbm) {


this.id = id;


this.name = name;


this.isbm = isbm;


}






/** *//** full constructor */




public Book(Long id, String name, String isbm, String author) {


this.id = id;


this.name = name;


this.isbm = isbm;


this.author = author;


}




// Property accessors






public Long getId() {


return this.id;


}






public void setId(Long id) {


this.id = id;


}






public String getName() {


return this.name;


}






public void setName(String name) {


this.name = name;


}






public String getIsbm() {


return this.isbm;


}






public void setIsbm(String isbm) {


this.isbm = isbm;


}






public String getAuthor() {


return this.author;


}






public void setAuthor(String author) {


this.author = author;


}




public String toString(){


return "[id=" + id + ",name=" + name + ",isbm=" + isbm + ",author=" + author + "]";


}


}
edu.jlu.fuliang.dao.BookDAO.java:


package edu.jlu.fuliang.dao;




import java.util.List;


import org.apache.commons.logging.Log;


import org.apache.commons.logging.LogFactory;


import org.hibernate.LockMode;


import org.springframework.context.ApplicationContext;


import org.springframework.orm.hibernate3.support.HibernateDaoSupport;




import edu.jlu.fuliang.domain.Book;






/** *//**


* Data access object (DAO) for domain model class Book.


*


* @see edu.jlu.fuliang.domain.Book


* @author MyEclipse Persistence Tools


*/






public class BookDAO extends HibernateDaoSupport ...{


private static final Log log = LogFactory.getLog(BookDAO.class);


// property constants


public static final String NAME = "name";


public static final String ISBM = "isbm";


public static final String AUTHOR = "author";






protected void initDao() ...{


// do nothing


}






public void save(Book transientInstance) ...{


log.debug("saving Book instance");




try ...{


getHibernateTemplate().save(transientInstance);


log.debug("save successful");




} catch (RuntimeException re) ...{


log.error("save failed", re);


throw re;


}


}






public void delete(Book persistentInstance) ...{


log.debug("deleting Book instance");




try ...{


getHibernateTemplate().delete(persistentInstance);


log.debug("delete successful");




} catch (RuntimeException re) ...{


log.error("delete failed", re);


throw re;


}


}






public Book findById(java.lang.Long id) ...{


log.debug("getting Book instance with id: " + id);




try ...{


Book instance = (Book) getHibernateTemplate().get(


"edu.jlu.fuliang.domain.Book", id);


return instance;




} catch (RuntimeException re) ...{


log.error("get failed", re);


throw re;


}


}






public List findByExample(Book instance) ...{


log.debug("finding Book instance by example");




try ...{


List results = getHibernateTemplate().findByExample(instance);


log.debug("find by example successful, result size: "


+ results.size());


return results;




} catch (RuntimeException re) ...{


log.error("find by example failed", re);


throw re;


}


}






public List findByProperty(String propertyName, Object value) ...{


log.debug("finding Book instance with property: " + propertyName


+ ", value: " + value);




try ...{


String queryString = "from Book 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 findByName(Object name) ...{


return findByProperty(NAME, name);


}






public List findByIsbm(Object isbm) ...{


return findByProperty(ISBM, isbm);


}






public List findByAuthor(Object author) ...{


return findByProperty(AUTHOR, author);


}






public List findAll() ...{


log.debug("finding all Book instances");




try ...{


String queryString = "from Book";


return getHibernateTemplate().find(queryString);




} catch (RuntimeException re) ...{


log.error("find all failed", re);


throw re;


}


}






public Book merge(Book detachedInstance) ...{


log.debug("merging Book instance");




try ...{


Book result = (Book) getHibernateTemplate().merge(detachedInstance);


log.debug("merge successful");


return result;




} catch (RuntimeException re) ...{


log.error("merge failed", re);


throw re;


}


}






public void attachDirty(Book instance) ...{


log.debug("attaching dirty Book instance");




try ...{


getHibernateTemplate().saveOrUpdate(instance);


log.debug("attach successful");




} catch (RuntimeException re) ...{


log.error("attach failed", re);


throw re;


}


}






public void attachClean(Book instance) ...{


log.debug("attaching clean Book instance");




try ...{


getHibernateTemplate().lock(instance, LockMode.NONE);


log.debug("attach successful");




} catch (RuntimeException re) ...{


log.error("attach failed", re);


throw re;


}


}






public static BookDAO getFromApplicationContext(ApplicationContext ctx) ...{


return (BookDAO) ctx.getBean("BookDAO");


}


}
Book.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="edu.jlu.fuliang.domain.Book" table="BOOK" schema="CLASSICCARS">


<id name="id" type="java.lang.Long">


<column name="ID" />


<generator class="identity" />


</id>


<property name="name" type="java.lang.String">


<column name="NAME" length="20" not-null="true" />


</property>


<property name="isbm" type="java.lang.String">


<column name="ISBM" length="20" not-null="true" unique="true" />


</property>


<property name="author" type="java.lang.String">


<column name="AUTHOR" length="15" />


</property>


</class>


</hibernate-mapping>

下面我们配置一下Spring，我们把applicationContext.xml分成了三个，分别是applicationContext-db.xml,applicationContext-dao.xml,applicationContext-service.我们看看如何配置：
applicationContext-db.xml:


<?xml version="1.0" encoding="UTF-8"?>


<beans


xmlns="http://www.springframework.org/schema/beans"


xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"


xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd">



<bean id="dataSource"


class="org.apache.commons.dbcp.BasicDataSource">


<property name="driverClassName"


value="org.apache.derby.jdbc.ClientDriver">


</property>


<property name="url"


value="jdbc:derby://localhost:1527/myeclipse;create=true">


</property>


<property name="username" value="classiccars"></property>


<property name="password" value="myeclipse"></property>


</bean>


<bean id="sessionFactory"


class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">


<property name="dataSource">


<ref bean="dataSource" />


</property>


<property name="hibernateProperties">


<props>


<prop key="hibernate.dialect">


org.hibernate.dialect.DerbyDialect


</prop>


<prop key="hibernate.show_sql">


true


</prop>


</props>


</property>


<property name="mappingResources">


<list>


<value>edu/jlu/fuliang/domain/Book.hbm.xml</value>


</list>


</property>


</bean>


</beans>



applicationContext-dao.xml:


<?xml version="1.0" encoding="UTF-8"?>


<beans


xmlns="http://www.springframework.org/schema/beans"


xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"


xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd">



<bean id="bookDAO" class="edu.jlu.fuliang.dao.BookDAO">


<property name="sessionFactory">


<ref bean="sessionFactory" />


</property>


</bean>


</beans>

接下来我们来写我们的Service层：
edu.jlu.fuliang.service.BookManageService.java


package edu.jlu.fuliang.service;


import java.util.List;




import edu.jlu.fuliang.domain.Book;






public interface BookManageService {


public List<Book> getAllBooks();


public List<Book> getBookByName(String name);


public void updateBook(Book book);


public void addBook(Book book);


public void deleteBook(long id);


}

edu.jlu.fuliang.service.impl.BookManageServiceImpl.java:


package edu.jlu.fuliang.serviceImpl;




import java.util.List;




import org.apache.commons.logging.Log;


import org.apache.commons.logging.LogFactory;




import edu.jlu.fuliang.dao.BookDAO;


import edu.jlu.fuliang.domain.Book;


import edu.jlu.fuliang.service.BookManageService;






public class BookManageServiceImpl implements BookManageService{


private static final Log log = LogFactory.getLog(BookManageServiceImpl.class);


private BookDAO bookDAO;


@Override




public void addBook(Book book) {


bookDAO.save(book);


}




@Override




public void deleteBook(long id) {


Book book = bookDAO.findById(id);


bookDAO.delete(book);


}




@Override




public List<Book> getAllBooks() {


return bookDAO.findAll();


}




@Override




public List<Book> getBookByName(String name) {


return bookDAO.findByName(name);


}




@Override




public void updateBook(Book book) {


log.info(book);


bookDAO.attachDirty(book);


}






public BookDAO getBookDAO() {


return bookDAO;


}






public void setBookDAO(BookDAO bookDAO) {


this.bookDAO = bookDAO;


}


}

然后我们来配置Service和事务:
applicationContext-service.xml:


<?xml version="1.0" encoding="UTF-8"?>


<beans


xmlns="http://www.springframework.org/schema/beans"


xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"


xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd">



<bean id="bookManageServiceTarget" class="edu.jlu.fuliang.serviceImpl.BookManageServiceImpl">


<property name="bookDAO">


<ref bean="bookDAO"/>


</property>


</bean>


<bean id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager">


<property name="sessionFactory" ref="sessionFactory"/>


</bean>


<bean id="bookManageService" class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean">


<property name="transactionManager" ref="transactionManager"/>


<property name="target" ref="bookManageServiceTarget"/>


<property name="transactionAttributes">


<props>


<prop key="add*">PROPAGATION_REQUIRED</prop>


<prop key="delete*">PROPAGATION_REQUIRED</prop>


<prop key="update*">PROPAGATION_REQUIRED</prop>


<prop key="get*">PROPAGATION_REQUIRED,readOnly</prop>


</props>


</property>


</bean>


</beans>

最后我们来把dwr整合进来:
我们在web.xml添加ContextLoaderListener来加载applicationContext-db.xml,applicationContext-dao.xm,applicationContext-service.xml,以及配置DwrServlet:

web.xml:


<?xml version="1.0" encoding="UTF-8"?>


<web-app version="2.4"


xmlns="http://java.sun.com/xml/ns/j2ee"


xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"


xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee

http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">

<context-param>


<param-name>contextConfigLocation</param-name>


<param-value>classpath:applicationContext-*.xml</param-value>


</context-param>


<listener>


<listener-class>


org.springframework.web.context.ContextLoaderListener


</listener-class>


</listener>


<servlet>


<servlet-name>dwr-invoker</servlet-name>


<servlet-class>org.directwebremoting.servlet.DwrServlet</servlet-class>


<init-param>


<param-name>debug</param-name>


<param-value>true</param-value>


</init-param>


</servlet>


<servlet-mapping>


<servlet-name>dwr-invoker</servlet-name>


<url-pattern>/dwr/*</url-pattern>


</servlet-mapping>


</web-app>
在dwr.xml中配制bean的创建方式,类型转换,以及Service要暴露的接口:


<dwr>


<allow>


<convert converter="bean" match="edu.jlu.fuliang.domain.Book"/>


<create creator="spring" javascript="BookManageService" >


<param name="beanName" value="bookManageService"/>


<include method="getAllBooks"/>


<include method="getBookByName"/>


<include method="updateBook"/>


<include method="addBook"/>


<include method="deleteBook"/>


</create>


</allow>


</dwr>
最后,我们编写jsp页面index.jsp:


<html>


<head><title>DWR test</title>


<script type='text/javascript' src='/DWRTest/dwr/interface/BookManageService.js'></script>


<script type='text/javascript' src='/DWRTest/dwr/engine.js'></script>


<script type='text/javascript' src='/DWRTest/dwr/util.js'></script>






<script type="text/javascript">




var bookCache = ...{};


var currentBook = null;






function loadAllBooks(){


BookManageService.getAllBooks(handleGetAllBooks,handleGetAllBooksError);


}




function handleGetAllBooks(books){




dwr.util.removeAllRows("booksBody",{ filter:function(tr) ...{


return (tr.id != "pattern");


}});




var book,id;




for(var i = 0; i < books.length; i++){


book = books[i];


id = book.id;






dwr.util.cloneNode("pattern", { idSuffix:id });


dwr.util.setValue("t_name" + id, book.name);


dwr.util.setValue("t_isbm" + id, book.isbm);


dwr.util.setValue("t_author" + id,book.author);


$("pattern" + id).style.display = "block";


bookCache[id] = book;


}


}




function handleGetAllBooksError(msg){


alert("Error: " + msg);


}






function addBook(){




var book = ...{name:null,isbm:null,author:null};


dwr.util.getValues(book);


dwr.engine.beginBatch();


BookManageService.addBook(book);


loadAllBooks();


dwr.engine.endBatch();


}






function editBook(btId){


currentBook = bookCache[btId.substring(4)];


dwr.util.setValues(currentBook);


}






function updateBook(){




var book = {id:null,name:null,isbm:null,author:null};


dwr.util.getValues(book);


book.id = currentBook.id;


BookManageService.updateBook(book,handleUpdateBook,handleUpdateBookError);


}






function handleUpdateBook(){


alert("Update book successfully!");


loadAllBooks();


}






function handleUpdateBookError(msg){


alert("Error: " + msg);


}






function deleteBook(btId){


var i = confirm("Are you sure to delete the book?");


if(i == true)


BookManageService.deleteBook(btId.substring(6),handleDeleteBook,handleDeleteBookError);


}






function handleDeleteBook(){


alert("The book has been delete successfully!");


loadAllBooks();


}






function handleDeleteBookError(msg){


alert("Error: " + msg);


}


</script>


</head>




<body onload="loadAllBooks()">


<div>


<h2>Add book</h2>


<table>


<tr>


<td>Name:</td><td><input type="text" id="name"></td>


</tr>


<tr>


<td>ISBN:</td>


<td><input type="text" id="isbm"></td>


</tr>




<tr>


<td>Author:</td>


<td><input type="text" id="author"></td>


</tr>


<tr>


<td colspan="2">


<input type="button" id="add" value="Add" onclick="addBook()">


<input type="button" id="update" value="Update" onclick="updateBook()">


</td>


</tr>


</table>


</div>


<hr>


<div id="list">


<table border="1">


<thead>


<tr>


<th>Name</th>


<th>ISBN</th>


<th>Author</th>


<th>Action</th>


</tr>


</thead>


<tbody id="booksBody">


<tr id="pattern" style="display:none;">


<td>


<span id="t_name"></span>


</td>


<td>


<span id="t_isbm"></span>


</td>


<td>


<span id="t_author"></span>


</td>


<td>


<span id="action">


<input id="edit" type="button" value="Edit" onclick="editBook(this.id)"/>


<input id="delete" type="button" value="Delete" onclick="deleteBook(this.id)"/>


</span>


</td>


</tr>


</tbody>


</table>


</div>


</body>
这样我们就完成了Spring+Hibernate+DWR的整合,我们可以在一个页面完成CURD操作了.