SSH框架流程

流程图

具体步骤

　　一、实体类

public class Category implements Serializable {
    private Integer cid;
    private String cname;
    //一级分类中存放二级分类的集合
    private Set<CategorySecond> categorySeconds=new HashSet<CategorySecond>();

    public Set<CategorySecond> getCategorySeconds() {
        return categorySeconds;
    }
    public void setCategorySeconds(Set<CategorySecond> categorySeconds) {
        this.categorySeconds = categorySeconds;
    }
    public Integer getCid() {
        return cid;
    }
    public void setCid(Integer cid) {
        this.cid = cid;
    }
    public String getCname() {
        return cname;
    }
    public void setCname(String cname) {
        this.cname = cname;
    }
}

　　二、映射文件

　　　　1、代码

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC
    "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
    "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd"> 

<hibernate-mapping>
    <class name="cn.itcast.shop.category.vo.Category" table="category">
        <id name="cid">
            <generator class="native"/>
        </id>
        <property name="cname"/>

        <!-- 配置二级分类的集合 -->
        <set order-by="csid" name="categorySeconds" lazy="false">
            <key column="cid"/>
            <one-to-many class="cn.itcast.shop.categorysecond.vo.CategorySecond"/>
        </set>
    </class>
</hibernate-mapping>  

　　　　2、配置到spring

<!--Hibernate的相关信息 -->
<bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
    <!-- 注入连接池 -->
    <property name="dataSource" ref="dataSource"/>
    <!-- 配置Hibernate的其他的属性 -->
    <property name="hibernateProperties">
        <props>
            <prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
            <prop key="hibernate.show_sql">true</prop>
            <prop key="hibernate.format_sql">true</prop>
            <prop key="hibernate.connection.autocommit">false</prop>
            <prop key="hibernate.hbm2ddl.auto">update</prop>
        </props>
    </property>
    <!-- 配置Hibernate的映射文件 -->
    <property name="mappingResources">
        <list>
            <value>cn/itcast/shop/category/vo/Category.hbm.xml</value>
        </list>
    </property>
</bean>    

　　三、对Service和Dao进行配置

　　　　1、Service

@Transactional
public class CategoryService {
    //注入CategoryDao
    private CategoryDao categoryDao;

    public void setCategoryDao(CategoryDao categoryDao) {
        this.categoryDao = categoryDao;
    }
}

　　　　2、Dao

public class CategoryDao extends HibernateDaoSupport {
    //Dao层的查询所有一级分类的方法
    public List<Category> findAll() {
        String hql="from Category";
        List<Category> list=this.getHibernateTemplate().find(hql);
        return list;
    }
}

　　四、将Service和Dao配置到spring

<!-- Service配置====================================================== -->
<bean id="categoryService" class="cn.itcast.shop.category.service.CategoryService">
    <property name="categoryDao" ref="categoryDao"/>
</bean>

<!-- Dao配置============================================================= -->
<bean id="categoryDao" class="cn.itcast.shop.category.dao.CategoryDao">
    <property name="sessionFactory" ref="sessionFactory"/>
</bean>

　　五、在Action中注入Service

public class IndexAction extends ActionSupport {
    //注入一级分类的service
    private CategoryService categoryService;

    public void setCategoryService(CategoryService categoryService) {
        this.categoryService = categoryService;
    }

    //注入商品的Service
    private ProductService productService;

    public void setProductService(ProductService productService) {
        this.productService = productService;
    }

    /*
     * 执行的访问首页的方法
     */
    public String execute(){
          //查询所有一级分类的集合
        List<Category> cList=categoryService.findAll();
        //将一级分类存入到session范围
        ActionContext.getContext().getSession().put("cList", cList);
        //查询热门商品
        List<Product> hList=productService.findHot();
        //将商品的信息存入到值栈中
        ActionContext.getContext().getValueStack().set("hList", hList);

        return "index";
    }
}

　　六、将数据显示到jsp页面

<%@ taglib uri="/struts-tags" prefix="s" %>
<div class="span24">
    <ul class="mainNav">
        <li>
            <a href="${ pageContext.request.contextPath }/index.action">首页</a>
            |
        </li>
        <!-- 如果保存在session中 -->
        <s:iterator var="c" value="#session.cList">
        <!-- 如果保存在值栈中 -->
        <!-- <s:iterator var="p" value="nList"> -->
            <li>
                <a href="${pageContext.request.contextPath }/product_findByCid.action?cid=<s:property value="#c.cid"/>&page=1"><s:property value="#c.cname"/></a>
                |
            </li>
        </s:iterator>
    </ul>
</div>

　　七、配置到Struts中

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
    "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
    "http://struts.apache.org/dtds/struts-2.3.dtd">

<struts>

    <constant name="struts.devMode" value="false" />
    <package name="shop" extends="struts-default" namespace="/">
        <!-- 全局页面 -->
        <global-results>
            <result name="msg">/WEB-INF/jsp/msg.jsp</result>
        </global-results>

        <!-- 配置首页访问的Action -->
        <action name="index" class="indexAction">
         <result name="index">/WEB-INF/jsp/index.jsp</result>
        </action>

        <!-- 验证码Action -->
        <action name="checkImg" class="checkImgAction"></action>

    </package>
</struts>