SSH--分页处理

妖狐艹你老母 2024-02-18 15:39 15阅读 0赞

Action代码：

/*
    	 * 分页查询处理
    	 */
    	@SuppressWarnings({ "unused", "unchecked" })
    	public String execute(){
    		String hql = "select count(*) from Goods";
    		Integer totalNum = (int) goodsBid.totalNum(hql).longValue();
    		pageSize = 3;
    		totalPage = (totalNum%pageSize==0)?(totalNum/pageSize):(totalNum/pageSize+1);
    		if(pageNum == null){
    			pageNum = 1;
    		}
    		if(pageNum < 1){
    			pageNum = 1;
    		}
    	    if(pageNum > totalPage){
    	    	pageNum = totalPage;
    	    }
    	    
    	    String hql2 = "from Goods order";
    	    List list = goodsBid.searchByHql(hql2,(pageNum-1)*pageSize,pageSize);
    	    request.put("onSaleGoodsList", list);
    		return "OnSaleGoodsList";
    	}

DaoImpl层实现：

/*
    	 * 通过Hql语句 分页查询当前页的商品列表
    	 */
    	@Override
    	public Long totalNum(String hql) {
    		return (Long) super.getHibernateTemplate().find(hql).iterator().next();
    	}
    
    	/*
    	 * 获取商品记录总数
    	 */
    	@SuppressWarnings("unchecked")
    	@Override
    	public List searchByHql(final String hql,final Integer begin,final Integer length) {
    		return super.getHibernateTemplate().execute(new HibernateCallback() {
    			@Override
    			public Object doInHibernate(Session session) throws HibernateException {
    				List list = session.createQuery(hql)
    						.setFirstResult(begin)
    						.setMaxResults(length)
    						.list();
    				return list;
    			}
    		});
    	}

jsp显示层：

<s:property value="pageNum"/>/<s:property value="totalPage"/>
              <s:url action="page" var="firstPage">
                  <s:param name="pageNum">1</s:param>
              </s:url><s:a href="%{firstPage}">首页</s:a>
              
              <s:url action="page" var="prePage">
                  <s:param name="pageNum">
                    <s:property value="pageNum-1"/>
                  </s:param>
              </s:url><s:a href="%{prePage}">上一页</s:a>
              
              <s:url action="page" var="nextPage">
                  <s:param name="pageNum">
                    <s:property value="pageNum+1"/>
                  </s:param>
              </s:url><s:a href="%{nextPage}">下一页</s:a>
              
              <s:url action="page" var="lastPage">
                  <s:param name="pageNum">
                     <s:property value="totalPage"/>
                  </s:param>
              </s:url><s:a href="%{lastPage}">末页</s:a>