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HQL 多表查询

2010-06-17 13:36:07| 分类： java | 标签： |举报 |字号大中小订阅

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实体类

InfoFIle.java

     private Long id;
     private String fileId;
     private String title;
     private String subtitle;
     private Integer filetype;
     private Date updatetime;
     private String author;

InfoFileOther.java

     private Long id;
     private Long clicknum;
     private Long downloadnum;
     private String fileId;
     private String varchar1;
     private String varchar2;
     private String varchar3;

String hql =" from InfoFile as a , InfoFileOther as b where a.fileId = b.fileId ";

hql中select a.id,b,id from .....返回的是Object[], 一个对象数组

因此这里有一种方法可以得到表连接返回的数据

list = this.getHibernateTemplate().find(hql);

if(list != null){
         Iterator it =list.iterator();
         while(it.hasNext()){
          Object[] o =(Object[])it.next();
          InfoFile info =(InfoFile)o[0];      //得到InfoFile对象

InfoFileOther ifo=(InfoFileOther)o[1]; //得到InfoFileOther

System.out.println(info.getId()); //对数据进行操作

}

遍历：

<c:forEach items="${pagination.list}" var="e">
                <tr bgcolor="#FFFFFF" align="center" valign="middle">
                    <td class="s12">${e[0].name}</td>
                    <td class="s12">${e[0].name}</td>
                  <td class="s12">
                     ${e[1].zxye}
                  </td>
                    <td>

                    </td>
                </tr>
            </c:forEach>

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历史上的今天

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      {else}
      <img alt="${x.visitorNickname|escape}" onerror="this.src=location.f40" class="cwd bdwa bdc0" src="${fn1(x.visitorName)}"/>
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      </a>
      <div class="cwd vname thide">
        {if x.moveFrom=='wap'}
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<#--最新日志，群博日志--> <#--推荐日志-->

<p class="fc06">推荐过这篇日志的人：</p>
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        </a>
        <div class="cwd thide">
          <a class="fc03 m2a" target="_blank" hidefocus="true" href="http://blog.163.com/${x.recommenderName}/">
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          </a>
        </div>
      </div>
      {/if}
      {/list}
    </div>
    {if !!b&&b.length>0}
    <p  class="fc06">他们还推荐了：</p>
    <ul>
    {list b as y}
      {if !!y}
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      {/if}
    {/list}
    </ul>
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<#--引用记录--> <#--博主推荐--> <#--随机阅读--> <#--首页推荐--> <#--历史上的今天--> <#--被推荐日志--> <#--上一篇，下一篇--> <#-- 热度 -->

{list a as x}
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      <a class="fc03 noul" target="_blank" hidefocus="true" href="http://blog.163.com/${x.publisherUsername}/">
      {if x.publisherUsername==visitor.userName}
      <img alt="${x.publisherNickname|escape}" onerror="this.src=location.f40" class="cwd bdwa bdc0" src="${fn1(x.publisherUsername)}&r=${visitor.imageUpdateTime}"/>
      {else}
      <img alt="${x.publisherNickname|escape}" onerror="this.src=location.f40" class="cwd bdwa bdc0" src="${fn1(x.publisherUsername)}"/>
      {/if}
      </a>
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        <a class="fc03 m2a"  target="_blank" hidefocus="true" href="http://blog.163.com/${x.publisherUsername}/">
          ${fn(x.publisherNickname,8)|escape}
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      </div>
      <a class="f-myLikeIcons hottype {if x.type==1} js-liketype{elseif x.type==2} js-reblogtype{elseif x.type==3} js-sharetype{else}{/if}" target="_blank" hidefocus="true" href="http://blog.163.com/${x.publisherUsername}/"> </a>
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    {/if}
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<#-- 网易新闻广告 --> <#--右边模块结构--> <#--评论模块结构--> <#--引用模块结构--> <#--博主发起的投票-->

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