JavaWeb之网上图书商城-框架搭建

一、写在前面

  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,在互联网众多的资料中看了许多,我想是应该本人的需求有点变态,所以花了将近半天时间的才明白是个什么回事。。。

二、谈谈项目架构

  因为高中开始接触.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(网址:http://www.hprose.com/)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,另一方面是他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。

 

Hprose相关用户手册下载:      https://files.cnblogs.com/files/hnyfeiyu/Hprose.zip

三、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:

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:

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:

<?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:

    <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。

一下是spring配置文件:

<?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&amp;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:

  <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>
    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~~

 

posted @ 2015-11-02 20:27  /会飞的鱼儿  阅读(4263)  评论(6编辑  收藏  举报