createdatabaseifnotexistsnews;
droptableifexistsnewssort;
createtablenewssort
(
nidintprimarykeyAUTO_INCREMENT,
sortvarchar(50)
);

droptableifexistsnews;
createtablenews
(
cidintprimarykeyAUTO_INCREMENT,
titlevarchar(50)notnull,
contentvarchar(500)notnull,
nidintnull
);

insertintonewssortvalues(null,'娱乐');
insertintonewssortvalues(null,'时事');

insertintonewsvalues(null,'好事','好事连连哈哈',1);
insertintonewsvalues(null,'坏事','坏事不断',1);
insertintonewsvalues(null,'爱情是什么','爱情是什么啊,还没知道呢',2);
insertintonewsvalues(null,'什么啊','测试内容',2);

select*fromnews;
select*fromnewssort;

packagecom.vo;

importjava.io.Serializable;

importjavax.persistence.Entity;
importjavax.persistence.GeneratedValue;
importjavax.persistence.GenerationType;
importjavax.persistence.Id;
importjavax.persistence.Table;

@SuppressWarnings("serial")
@Entity
@Table(name="news")
publicclassNewsimplementsSerializable
{
privateIntegercid;
privateStringtitle;
privateStringcontent;
@Id
@GeneratedValue(strategy=GenerationType.AUTO)
publicIntegergetCid()
{
returncid;
}

publicvoidsetCid(Integercid)
{
this.cid=cid;
}

publicStringgetTitle()
{
returntitle;
}

publicvoidsetTitle(Stringtitle)
{
this.title=title;
}

publicStringgetContent()
{
returncontent;
}

publicvoidsetContent(Stringcontent)
{
this.content=content;
}
}

packagecom.vo;

importjava.io.Serializable;
importjava.util.ArrayList;
importjava.util.List;

importjavax.persistence.Entity;
importjavax.persistence.GeneratedValue;
importjavax.persistence.GenerationType;
importjavax.persistence.Id;
importjavax.persistence.JoinColumn;
importjavax.persistence.OneToMany;
importjavax.persistence.Table;

importorg.hibernate.annotations.LazyCollection;
importorg.hibernate.annotations.LazyCollectionOption;

@SuppressWarnings("serial")
@Entity
@Table(name="newssort")
publicclassNewssortimplementsSerializable
{
privateIntegernid;
privateStringsort;
privateList<News>news=newArrayList<News>();
@OneToMany
@JoinColumn(name="nid")
@LazyCollection(LazyCollectionOption.FALSE)
publicList<News>getNews()
{
returnnews;
}

publicvoidsetNews(List<News>news)
{
this.news=news;
}

@Id
@GeneratedValue(strategy=GenerationType.AUTO)
publicIntegergetNid()
{
returnnid;
}

publicvoidsetNid(Integernid)
{
this.nid=nid;
}

publicStringgetSort()
{
returnsort;
}

publicvoidsetSort(Stringsort)
{
this.sort=sort;
}
}

packagecom.test;

importjava.util.Iterator;
importorg.hibernate.Session;
importorg.hibernate.cfg.AnnotationConfiguration;
importorg.junit.After;
importorg.junit.Before;

importcom.vo.News;
importcom.vo.Newssort;
publicclassTest
{
privateSessionsession;
@Before
publicvoidsetUp()
{
session=newAnnotationConfiguration().configure().buildSessionFactory().openSession();
}
@After
publicvoidtearDown()
{
session.close();
}

@SuppressWarnings("unchecked")
@org.junit.Test
publicvoidtestFind()
{
@SuppressWarnings("unused")
//List<Newssort>newssort=session.createCriteria(Newssort.class).list();
Newssortnewssort=(Newssort)session.load(Newssort.class,2);
for(Iterator<News>i=newssort.getNews().iterator();i.hasNext();)
{
Stringtitle=i.next().getTitle();
System.out.println(title);
}
}
}

packagecom.web.action;

importjava.util.List;
importjava.util.Map;

importorg.hibernate.Session;
importorg.hibernate.cfg.AnnotationConfiguration;

importcom.opensymphony.xwork2.ActionContext;
importcom.opensymphony.xwork2.ActionSupport;
importcom.vo.News;
importcom.vo.Newssort;

@SuppressWarnings({"serial","unchecked"})
publicclassNewsActionextendsActionSupport
{
privateSessionsession;
privateIntegersortid;

publicIntegergetSortid()
{
returnsortid;
}

publicvoidsetSortid(Integersortid)
{
this.sortid=sortid;
}

publicvoidinit()
{
session=newAnnotationConfiguration().configure()
.buildSessionFactory().openSession();
}

publicStringfindNewssort()
{
this.init();
List<Newssort>sorts=session.createCriteria(Newssort.class).list();
Maprequest=(Map)ActionContext.getContext().get("request");
request.put("sorts",sorts);
session.close();
returnSUCCESS;
}

publicStringfindNews()
{
this.init();
System.out.println("findNews");
List<Newssort>sorts=session.createCriteria(Newssort.class).list();
Newssortnewssort=(Newssort)session.load(Newssort.class,sortid);
List<News>news=newssort.getNews();
Maprequest=(Map)ActionContext.getContext().get("request");
request.put("sorts",sorts);
request.put("news",news);
session.close();
returnSUCCESS;
}
}

<?xmlversion="1.0"encoding="UTF-8"?>
<!DOCTYPEhibernate-configurationPUBLIC
"-//Hibernate/HibernateConfigurationDTD3.0//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<propertyname="dialect">org.hibernate.dialect.MySQLDialect</property>
<propertyname="connection.driver_class">com.mysql.jdbc.Driver</property>
<propertyname="connection.url">jdbc:mysql://localhost:3306/news</property>
<propertyname="connection.username">root</property>
<propertyname="connection.password">root</property>
<propertyname="show_sql">true</property>
<!--实体类映射-->
<mappingclass="com.vo.News"/>
<mappingclass="com.vo.Newssort"/>
</session-factory>
</hibernate-configuration>

<?xmlversion="1.0"encoding="UTF-8"?>
<!DOCTYPEstrutsPUBLIC
"-//ApacheSoftwareFoundation//DTDStrutsConfiguration2.0//EN"
"http://struts.apache.org/dtds/struts-2.0.dtd">
<struts>
<packagename="com"extends="struts-default">
<actionname="findNewssort"class="com.web.action.NewsAction"method="findNewssort">
<resultname="success">/index.jsp</result>
</action>

<actionname="findNews"class="com.web.action.NewsAction"method="findNews">
<resultname="success">/index.jsp</result>
</action>
</package>
</struts>

<?xmlversion="1.0"encoding="UTF-8"?>
<web-appversion="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">
<filter>
<filter-name>struts2</filter-name>
<filter-class>
org.apache.struts2.dispatcher.FilterDispatcher
</filter-class>
</filter>
<filter-mapping>
<filter-name>struts2</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<welcome-file-list>
<welcome-file>prepare.jsp</welcome-file>
</welcome-file-list>
</web-app>

<%@pagelanguage="java"pageEncoding="GB18030"%>
<html>
<head>
<title>MyJSP'index.jsp'startingpage</title>
<scripttype="text/javascript">
window.location="findNewssort.action";
</script>
</head>
<body>
</body>
</html>

<%@pagelanguage="java"pageEncoding="GB18030"%>
<%@tagliburi="/struts-tags"prefix="s"%>
<html>
<head>
<title>MyJSP'index.jsp'startingpage</title>
<scripttype="text/javascript">
functionfindNews()
{
varsort=document.getElementById("sort");
window.location="findNews.action?sortid="+sort.value;
}
</script>
</head>
<body>
<selectid="sort"name="sortid"onchange="findNews();">
<option>请选择</option>
<s:iteratorvalue="#request['sorts']"id="sort">
<optionvalue="<s:propertyvalue='#sort.nid'/>"><s:propertyvalue="#sort.sort"/></option>
</s:iterator>
</select>
<hr/>
<s:iteratorvalue="#request['news']"id="news">
<s:propertyvalue="#news.title"/><br/>
</s:iterator>
</body>
</html>