以前一直接触.net相关的web开发,现在猛然使用javaWeb还是很不习惯,就连搭个框架也是第一次。
一、谈谈项目架构
一开始接触.net相关的开发所以对于.net相关的开发还是比较熟悉的,但我在学校学的java方向的开发,而我打算把这两种平台结合起来,使用java做后台也就是服务提供者,将所有业务逻辑在java平台完成并使用我比较熟悉的.net做Web端的开发。这样一来安卓app,web端就都有了。客户端统一通过分布式框架调用服务。找了很久最终选择了Hprose,这一轻量级、跨语言、跨平台、无侵入式、高性能动态远程对象调用引擎库。之所以选择它一方面是因为学习成本低,另一方面是它的跨平台调用非常轻松高效,因为我们要使用.net做web需要调用java发布的服务!大概看了一下Hprose的文档,发现使用内置的HproseServlet发布服务开发速度比较快也比较简单,所以准备使用这种方式发布服务。可问题来了,传统的ssh架构感觉有点重了,准备使用.net开发web端所以感觉没有必要整合Struts,于是就是hibernate+spring+hprose这种架构。
二、数据库设计
一个小网上书城,所以设计的还有欠缺,以实用为主,主要是练手java开发~~。所以使用了navicat简单设计了一下,不过没有设计表关联,取而代之的是后来一个一个添加关系的,发现这个设计工具有点问题,图示:
其实表关联一看就能看出来~~,接下来就是hibernate一些映射了,同样也是使用插件生成model和映射文件
稍作修改就是这样--
三、spring3+hibernate4配置
因为model和映射文件是自动生成所以稍加配置就好,需要注意的是复合主键的设置,自动生成的会把复合主键对应一个复合模型。如商品评论表的复合主键类型:
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package com.book.model; // Generated 2015-11-2 9:07:06 by Hibernate Tools 4.0.0.Final import java.util.Date; /** * CommentsId generated by hbm2java */ public class CommentsPk implements java.io.Serializable { private Book book; private User user; private Date commentsDate; public CommentsPk() { } public CommentsPk(Book book, User user, Date commentsDate) { this .book = book; this .user = user; this .commentsDate = commentsDate; } public Book getBook() { return this .book; } public void setBook(Book book) { this .book = book; } public User getUser() { return this .user; } public void setUser(User user) { this .user = user; } public Date getCommentsDate() { return this .commentsDate; } public void setCommentsDate(Date commentsDate) { this .commentsDate = commentsDate; } public boolean equals(Object other) { if (( this == other)) return true ; if ((other == null )) return false ; if (!(other instanceof CommentsPk)) return false ; CommentsPk castOther = (CommentsPk) other; return (( this .getBook() == castOther.getBook()) || ( this .getBook() != null && castOther.getBook() != null && this .getBook().equals(castOther.getBook()))) && (( this .getUser() == castOther.getUser()) || ( this .getUser() != null && castOther.getUser() != null && this .getUser().equals(castOther.getUser()))) && (( this .getCommentsDate() == castOther.getCommentsDate()) || ( this .getCommentsDate() != null && castOther.getCommentsDate() != null && this .getCommentsDate().equals(castOther.getCommentsDate()))); } public int hashCode() { int result = 17 ; result = 37 * result + (getBook() == null ? 0 : this .getBook().hashCode()); result = 37 * result + (getUser() == null ? 0 : this .getUser().hashCode()); result = 37 * result + (getCommentsDate() == null ? 0 : this .getCommentsDate().hashCode()); return result; } } |
商品评论表模型:
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package com.book.model; // Generated 2015-10-30 14:56:21 by Hibernate Tools 4.0.0.Final import java.sql.Date; /** * Comments generated by hbm2java */ public class Comments implements java.io.Serializable { private String content; private String pic; private Integer client; private CommentsPk id; public Comments() { } public String getContent() { return content; } public void setContent(String content) { this .content = content; } public String getPic() { return pic; } public void setPic(String pic) { this .pic = pic; } public Integer getClient() { return client; } public void setClient(Integer client) { this .client = client; } public CommentsPk getId() { return id; } public void setId(CommentsPk id) { this .id = id; } public Comments(String content, String pic, Integer client, CommentsPk id) { super (); this .content = content; this .pic = pic; this .client = client; this .id = id; } } |
相应的Hibernate 映射文件:
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<? xml version = "1.0" ?> <!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd"> <!-- Generated 2015-10-30 14:56:21 by Hibernate Tools 4.0.0.Final --> < hibernate-mapping > < class name = "com.book.model.Comments" table = "comments" catalog = "bookstore" > < composite-id name = "id" class = "com.book.model.CommentsPk" > < key-many-to-one name = "book" class = "com.book.model.Book" > < column name = "BookID" /> </ key-many-to-one > < key-many-to-one name = "user" class = "com.book.model.User" > < column name = "UserID" /> </ key-many-to-one > < key-property name = "commentsDate" type = "timestamp" > < column name = "CommentsDate" length = "19" /> </ key-property > </ composite-id > < property name = "content" type = "string" > < column name = "Content" length = "65535" /> </ property > < property name = "pic" type = "string" > < column name = "Pic" length = "65535" /> </ property > < property name = "client" type = "java.lang.Integer" > < column name = "Client" /> </ property > </ class > </ hibernate-mapping > |
因为商品评论表有两个是外键所以使用了key-many-to-one标签。
由于采用spring3.2+hibernate4.1所以得到sessionFactory的方式只限于sessionFactory.getCurrentSession();但是必须开启事物:
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<bean id= "transactionManager" class = "org.springframework.orm.hibernate4.HibernateTransactionManager" > <property name= "sessionFactory" ref= "sessionFactory" /> </bean> <!-- 事务的传播特性 --> <tx:advice id= "txadvice" transaction-manager= "transactionManager" > <tx:attributes> <tx:method name= "add*" propagation= "REQUIRED" /> <tx:method name= "delete*" propagation= "REQUIRED" /> <tx:method name= "modify*" propagation= "REQUIRED" /> <!--hibernate4必须配置为开启事务 否则 getCurrentSession()获取不到--> <tx:method name= "*" propagation= "REQUIRED" read-only= "true" /> </tx:attributes> </tx:advice> |
以上都是我配置的时候出现问题的地方。下面是spring配置文件:
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<?xml version= "1.0" encoding= "UTF-8" ?> <beans xmlns= "http://www.springframework.org/schema/beans" xmlns:xsi= "http://www.w3.org/2001/XMLSchema-instance" xmlns:aop= "http://www.springframework.org/schema/aop" xmlns:context= "http://www.springframework.org/schema/context" xmlns:tx= "http://www.springframework.org/schema/tx" xsi:schemaLocation="http: //www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd http: //www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.2.xsd http: //www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.2.xsd http: //www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.2.xsd"> <!-- 启用spring注解支持 --> <context:annotation-config /> <bean id= "dataSource" class = "org.apache.commons.dbcp.BasicDataSource" destroy-method= "close" > <property name= "driverClassName" value= "com.mysql.jdbc.Driver" /> <property name= "url" value= "jdbc:mysql://127.0.0.1/bookstore?useUnicode=true&characterEncoding=UTF-8" /> <property name= "username" value= "root" /> <property name= "password" value= "yangyang" /> </bean> <!-- 可追加配置二级缓存 --> <bean id= "sessionFactory" class = "org.springframework.orm.hibernate4.LocalSessionFactoryBean" > <property name= "dataSource" ref= "dataSource" /> <property name= "mappingDirectoryLocations" > <list> <value>classpath:config</value> </list> </property> <property name= "hibernateProperties" > <props> <prop key= "hibernate.dialect" >org.hibernate.dialect.MySQLDialect</prop> <prop key= "hibernate.show_sql" > true </prop> <prop key= "hibernate.hbm2ddl.auto" >update</prop> <prop key= "hibernate.temp.use_jdbc_metadata_defaults" > false </prop> <prop key= "current_session_context_class" >thread</prop> </props> </property> </bean> <!-- 配置事务管理器 --> <bean id= "transactionManager" class = "org.springframework.orm.hibernate4.HibernateTransactionManager" > <property name= "sessionFactory" ref= "sessionFactory" /> </bean> <!-- 事务的传播特性 --> <tx:advice id= "txadvice" transaction-manager= "transactionManager" > <tx:attributes> <tx:method name= "add*" propagation= "REQUIRED" /> <tx:method name= "delete*" propagation= "REQUIRED" /> <tx:method name= "modify*" propagation= "REQUIRED" /> <!--hibernate4必须配置为开启事务 否则 getCurrentSession()获取不到--> <tx:method name= "*" propagation= "REQUIRED" read-only= "true" /> </tx:attributes> </tx:advice> <!-- 那些类那些方法使用事务 --> <aop:config> <!-- 只对业务逻辑层实施事务 --> <aop:pointcut id= "allManagerMethod" expression= "execution(* com.book.test.*.*(..))" /> <aop:advisor pointcut-ref= "allManagerMethod" advice-ref= "txadvice" /> </aop:config> <bean name= "basedao" class = "com.book.dao.impl.AdressDao" /> <bean name= "orderdao" class = "com.book.dao.impl.OrderDao" /> </beans> |
一切就绪之后我们使用servlet测试:
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<servlet> <servlet-name>test</servlet-name> <servlet- class >com.book.test.Test</servlet- class > </servlet> <servlet-mapping> <servlet-name>test</servlet-name> <url-pattern>/index</url-pattern> </servlet-mapping> |
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protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub BeanFactory factor = WebApplicationContextUtils.getRequiredWebApplicationContext(request.getSession().getServletContext()); OrderDao dao= factor.getBean(OrderDao. class ); Object[] list= dao.get( 1 ).getOrderitems().toArray(); System.out.println(((Orderitem)list[ 0 ]).getOrdercount()); } |
因为没有使用structs我们需要自己查找spring的BeanFactory来获得dao bean 这也是需要注意的地方,纠结好久。
运行结果:
成功加载订单表订单1项目订购数量。
毕竟第一次使用java开发这类项目,慢慢学习吧,希望大家可以喜欢JavaWeb搭建的网上图书商城框架,对大家的学习有所帮助。