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:

 

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>