??? 對(duì)于ssh框架來(lái)說(shuō)的話分頁(yè)，主要的思想就是dao層完成對(duì)數(shù)據(jù)庫(kù)的操作，service層對(duì)業(yè)務(wù)進(jìn)行管理，action對(duì)頁(yè)面進(jìn)行管理。

分頁(yè)需要的bean。

?

import?java.util.List; ?

public?class?PageBean?{ ?

?????????private?List?list; ?

????private?int?allRow;//?總記錄數(shù) ?

????private?int?totalPage;//?總頁(yè)數(shù) ?

????private?int?currentPage;//?當(dāng)前頁(yè) ?

????private?int?pageSize;//?每頁(yè)記錄數(shù) ?

???????????private?boolean?isFirstPage;//?是否為第一頁(yè) ?

????private?boolean?isLastPage;//?是否為最后一頁(yè) ?

????private?boolean?hasPreviousPage;//?是否有前一頁(yè) ?

????private?boolean?hasNextPage;//?是否有下一頁(yè) ?

?

????public?List?getList()?{ ?

????????return?list; ?

????} ?

?

????public?void?setList(List?list)?{ ?

????????this.list?=?list; ?

????} ?

?

????public?void?setFirstPage(boolean?isFirstPage)?{ ?

????????this.isFirstPage?=?isFirstPage; ?

????} ?

?

????public?void?setLastPage(boolean?isLastPage)?{ ?

????????this.isLastPage?=?isLastPage; ?

????} ?

?

????public?void?setHasPreviousPage(boolean?hasPreviousPage)?{ ?

????????this.hasPreviousPage?=?hasPreviousPage; ?

????} ?

?

????public?void?setHasNextPage(boolean?hasNextPage)?{ ?

????????this.hasNextPage?=?hasNextPage; ?

????} ?

?

???? ?

?

????public?int?getAllRow()?{ ?

????????return?allRow; ?

????} ?

?

????public?void?setAllRow(int?allRow)?{ ?

????????this.allRow?=?allRow; ?

????} ?

?

????public?int?getTotalPage()?{ ?

????????return?totalPage; ?

????} ?

?

????public?void?setTotalPage(int?totalPage)?{ ?

????????this.totalPage?=?totalPage; ?

????} ?

?

????public?int?getCurrentPage()?{ ?

????????return?currentPage; ?

????} ?

?

????public?void?setCurrentPage(int?currentPage)?{ ?

????????this.currentPage?=?currentPage; ?

????} ?

?

????public?int?getPageSize()?{ ?

????????return?pageSize; ?

????} ?

?

????public?void?setPageSize(int?pageSize)?{ ?

????????this.pageSize?=?pageSize; ?

????} ?

?

???? ?

?

????//?　　/**?*//** ?

????//?　　?*?初始化分頁(yè)信息 ?

????//?　　?*/ ?

????public?void?init()?{ ?

????????this.isFirstPage?=?isFirstPage(); ?

????????this.isLastPage?=?isLastPage(); ?

????????this.hasPreviousPage?=?isHasPreviousPage(); ?

????????this.hasNextPage?=?isHasNextPage(); ?

????} ?

?

????//?　　/**?*//** ?

????//?　　?*?以下判斷頁(yè)的信息,只需getter方法(is方法)即可 ?

????//?　　?*?@return ?

????//?　　?*/ ?

????//?　　 ?

????public?boolean?isFirstPage()?{ ?

????????return?currentPage?==?1;//?如是當(dāng)前頁(yè)是第1頁(yè) ?

????} ?

?

????public?boolean?isLastPage()?{ ?

????????return?currentPage?==?totalPage;//?如果當(dāng)前頁(yè)是最后一頁(yè) ?

????} ?

?

????public?boolean?isHasPreviousPage()?{ ?

????????return?currentPage?!=?1;//?只要當(dāng)前頁(yè)不是第1頁(yè) ?

????} ?

?

????public?boolean?isHasNextPage()?{ ?

????????return?currentPage?!=?totalPage;//?只要當(dāng)前頁(yè)不是最后1頁(yè) ?

????}?//?　 ?

?

????//?　 ?

????//?　　/**?*//** ?

????//?　　?*?計(jì)算總頁(yè)數(shù),靜態(tài)方法,供外部直接通過(guò)類(lèi)名調(diào)用 ?

????//?　　?*?@param?pageSize?每頁(yè)記錄數(shù) ?

????//?　　?*?@param?allRow?總記錄數(shù) ?

????//?　　?*?@return?總頁(yè)數(shù) ?

????//?　　?*/ ?

????public?static?int?countTotalPage(final?int?pageSize,?final?int?allRow)?{ ?

????????int?totalPage?=?allRow?%?pageSize?==?0???allRow?/?pageSize?:?allRow ?

????????????????/?pageSize?+?1; ?

????????return?totalPage; ?

????} ?

?

????//?　　/**?*//** ?

?????????//?????*這個(gè)方法的邏輯非常關(guān)鍵，如果不弄清的話，在dao層調(diào)用的時(shí)候會(huì)出現(xiàn)不必要的麻煩。 ?

????//?　　?*?計(jì)算當(dāng)前頁(yè)開(kāi)始記錄 ?

????//?　　?*?@param?pageSize?每頁(yè)記錄數(shù) ?

????//?　　?*?@param?currentPage?當(dāng)前第幾頁(yè) ?

????//?　　?*?@return?當(dāng)前頁(yè)開(kāi)始記錄號(hào) ?

????//?　　?*/ ?

????public?static?int?countOffset(final?int?pageSize,?final?int?currentPage)?{ ?

???????? ?

????????int?offset?=?pageSize?*?(currentPage?-?1); ?

????????????????if(offset<=0){ ?

????????????????????return?offset?=?0; ?

????????????????} ?

???????????????????? ?

????????return?offset; ?

????} ?

?

????//?? ?

????//?　　/**?*//** ?

????//?　　?*?計(jì)算當(dāng)前頁(yè),若為0或者請(qǐng)求的URL中沒(méi)有"?page=",則用1代替 ?

????//?　　?*?@param?page?傳入的參數(shù)(可能為空,即0,則返回1) ?

????//?　　?*?@return?當(dāng)前頁(yè) ?

????//?　　?*/ ?

????public?static?int?countCurrentPage(int?page)?{ ?

????????final?int?curPage?=?(page?==?0???1?:?page); ?

????????return?curPage; ?

????} ?

} ?

dao層代碼：

?

package?test; ?

?

import?java.sql.SQLException; ?

import?java.util.List; ?

?

import?org.hibernate.HibernateException; ?

import?org.hibernate.Query; ?

import?org.hibernate.Session; ?

import?org.springframework.orm.hibernate3.HibernateCallback; ?

import?org.springframework.orm.hibernate3.support.HibernateDaoSupport; ?

?

public?class?MemberDaoImpl?extends?HibernateDaoSupport?implements?MemberDao?{ ?

/*??　?//實(shí)現(xiàn)的接口自己寫(xiě)就可以了　? ?

????　　? ?

????　　*//**?*//**? ?

????　　?*?分頁(yè)查詢? ?

????　　?*?@param?hql?查詢的條件? ?

????　　?*?@param?offset?開(kāi)始記錄? ?

????　　?*?@param?length?一次查詢幾條記錄? ?

????　　?*?@return? ?

????　　?*//*? ?

*/ ?

????public?List?queryForPage(final?String?hql,?final?int?offset, ?

????????????final?int?length)?{ ?

????????List?list?=?getHibernateTemplate().executeFind(new?HibernateCallback()?{ ?

????????????public?Object?doInHibernate(Session?session)?throws ?

?

????????????HibernateException,?SQLException?{ ?

????????????????Query?query?=?session.createQuery(hql); ?

????????????????query.setFirstResult(offset); ?

????????????????query.setMaxResults(length); ?

????????????????List?list?=?query.list(); ?

????????????????return?list; ?

????????????} ?

????????}); ?

????????return?list; ?

????} ?

?

????public?int?getAllRowCount(String?hql)?{ ?

????????return?getHibernateTemplate().find(hql).size(); ?

?

????} ?

?

} ?

action：

?

public?class?ListAction?extends?ActionSupport?{ ?

????//?通過(guò)applicationContext.xml配置文件注入memberService的值 ?

????private?FenyeService?fenyeservice?; ?

?

????public?void?setFenyeService?(FenyeService?fenyeservice?)?{ ?

????????this.fenyeservice?=?fenyeservice?; ?

????} ?

?????????public?FenyeService??getFenyeService?(FenyeService???fenyeservice?){ ?

???????????????????return?fenyeservice? ?

} ?

????private?int?page;//?第幾頁(yè) ?

?

????private?PageBean?pageBean;//?包含分布信息的bean ?

?

????public?int?getPage()?{ ?

????????return?page; ?

????} ?

?

????public?void?setPage(int?page)?{//?若URL中無(wú)此參數(shù),會(huì)默認(rèn)為第1頁(yè) ?

????????this.page?=?page; ?

????} ?

?

????public?PageBean?getPageBean()?{ ?

????????return?pageBean; ?

????} ?

?

????public?void?setPageBean(PageBean?pageBean)?{ ?

????????this.pageBean?=?pageBean; ?

????} ?

?

????@Override ?

????public?String?execute()?throws?Exception?{ ?

????????//?分頁(yè)的pageBean,參數(shù)pageSize表示每頁(yè)顯示記錄數(shù),page為當(dāng)前頁(yè) ?

????????this.pageBean?=?fenyeservice?.queryForPage(3,?page); ?

????????return?SUCCESS; ?

????} ?

}?

jsp頁(yè)面的話就是<s:iterator value="pagebean.list">迭代標(biāo)簽了.<s:property value="list內(nèi)的名字">

差不多就這些了。如果還有什么疑問(wèn)的話可以給我留言，我盡快給你答復(fù).

轉(zhuǎn)載于:https://blog.51cto.com/3504199/921056

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