求一个在jsp的分页代码附带注释

发布网友 发布时间：2024-10-23 22:17

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热心网友 时间：2024-10-24 00:05

int i;
int ipage=10; //分页单位
int allpage; //总页数
int pages; //接受的页码变量
int cpage=1; //当前页
int spage; //开始页

//数据库连接声明
java.lang.String sql,pagesql;
java.sql.ResultSet rs,pagers;
pagesql = "select count(a_id) as A from article";

//取总文章数
pagers = sqlconn.executeQuery(pagesql);
int allCol = pagers.getInt("A");

//获得总页面数
allpage = (int)Math.ceil((allCol + ipage-1) / ipage);

//判断参数pages是否为空
if (request.getParameter("pages")==null) {
pages=1;
} else {
pages = new Integer(request.getParameter("pages")).intValue();
}

//判断当前页
if(pages > allpage // pages == 0){
cpage = 1;
} else {
cpage = pages;
}

//判断起始页
spage=(cpage-1)*ipage;

sql = "select a_id,a_title,a_author,aID,a_time,a_readtime,sID from article order by a_id desc limit "+ spage +","+ ipage;
rs = sqlconn.executeQuery(sql);
int cu=1;

//循环取数据库值
while (rs.next()) {
int aID = rs.getInt("a_id");
aTitle = rs.getString("a_title");
aAuthor = rs.getString("a_author");
int ArticleTypeID = rs.getInt("aID");
int ReadTime = rs.getInt("a_readtime");
InsertTime = rs.getString("a_time");
if (cu % 2 == 0) { Color="#DBECFD"; }
else { Color="#C6E1FD"; }
switch (ArticleTypeID) {
case(1):
ArticleType="小说";
break;
case(2):
ArticleType="散文";
break;
case(3):
ArticleType="诗歌";
break;
case(4):
ArticleType="随笔";
break;
}
%>
<tr bgcolor="<%= Color %>">
<td width="300"><a href="viewarticle.jsp?aID=<%= aID %>"><%= aTitle %></a></td>
<td align="center" width="100"><%= aAuthor %></td>
<td align="center" width="50"><%= ArticleType %></td>
<td align="center" width="50"><%= ReadTime %></td>
<td align="center" width="240"><%= InsertTime %></td>
</tr>
<%
cu++;
}
%>