java分页
import java.util.List;
/**
* @author Administrator
*
*
*/
public class PageControl {
private int prevPage = 1;
private int nextPage = 1;
private int pageCount = 1;
private int pageNum = 1;
private int recordCount = 0;
private int pageSize = 20;
private List list;
private int start;
public PageControl() {
}
/**
* @param li:列表
* @param count:记录集总数
* @param page:当前页
* @param s
* @param ps
*/
public PageControl(List li, int count, int page, int s, int ps) {
this.recordCount = count;
this.pageNum = page;
if (page < 1) {
this.pageNum = 1;
}
this.pageSize = ps;
adjust();
this.list = li;
this.start = s;
}
private void adjust() {
pageCount = (int) ((float) recordCount / pageSize + 0.99);
pageNum = (pageNum > 0 ? pageNum : 1);
pageNum = (pageNum > pageCount ? pageCount : pageNum);
nextPage = (pageNum < pageCount ? (pageNum + 1) : pageCount);
prevPage = (pageNum > 1 ? (pageNum - 1) : 1);
}
/**
* 返回分页控制器
*/
public String getShowPage() {
StringBuffer sb = new StringBuffer("\n");
if (pageCount <= 1) {
sb.append("<input type=hidden name=ipage>");
return sb.toString();
}
if (pageNum > 1) {
sb.append("<a href=\"javascript:GoPage(1)\">");
sb
.append("<img src=\"/images/firs_button.gif\" border=\"0\" valign=\"absbottom\"></a> ");
sb.append("<a href=\"javascript:GoPage(" + (pageNum - 1) + ")\">");
sb
.append("<img src=\"/images/prev_button.gif\" border=\"0\" valign=\"absbottom\"></a>\n");
}
if (pageNum < pageCount) {
sb.append(" <a href=\"javascript:GoPage("
+ (pageNum + 1) + ")\">");
sb
.append("<img src=\"/images/next_button.gif\" border=\"0\" valign=\"absbottom\"></a> ");
sb.append("<a href=\"javascript:GoPage(" + pageCount + ")\">");
sb
.append("<img src=\"/images/last_button.gif\" border=\"0\" valign=\"absbottom\"></a>\n");
}
if (pageCount > 1) {
sb.append(" 共" + recordCount + "条记录 分" + pageCount
+ "页 每页" + pageSize + "条\n");
sb
.append(" 当前第<select name=\"ipage\" onchange=\"GoPage(this.value)\">\n");
for (int i = 1; i <= pageCount; i++) {
if (i == pageNum) {
sb.append("<option selected value=\"" + i + "\">" + i
+ "</option>\n");
} else {
sb.append("<option value=\"" + i + "\">" + i
+ "</option>\n");
}
}
sb.append("</select>页 \n");
}
return sb.toString();
}
public int getNextPage() {
return nextPage;
}
public int getFirstNo() {
return (pageNum - 1) * pageSize + 1;
}
/**
* 每一页大小
*
* @return
*/
public int getPageSize() {
return pageSize;
}
public int getPageCount() {
return pageCount;
}
/**
* 当前第几页页面
*
* @return
*/
public int getPageNum() {
return pageNum;
}
public int getPrevPage() {
return prevPage;
}
/**
* 总记录数
*
* @return
*/
public int getRecordCount() {
return recordCount;
}
public void setPageSize(int i) {
pageSize = i;
}
public List getList() {
return list;
}
/**
* 从第几条开始
*
* @return
*/
public int getStart() {
return start;
}
/**
* 输出分页显示的结果.
*
* @param pageNum
* 当前页面
* @param recordCount
* 所有结果
* @param pageSize
* 一页显示的多少
* @param pageCountSize
* 前后跳页的多少
* @param linkpageurl
* 连接页面的 URL 字符串
* @return 分页结果的字符串.
*/
public String paging(int pageCountSize, String linkpageurl) {
int PageCount = -1; // 页面总数
String LinkPageName = linkpageurl;
String LinkText = "";
int StartPage;
int TempPage;
int TempPageCount;
TempPage = (pageNum - 1) % pageCountSize; //
StartPage = pageNum - TempPage; //
TempPageCount = recordCount % pageSize;
if (TempPageCount == 0) {
PageCount = recordCount / pageSize;
} else {
PageCount = (recordCount / pageSize) + 1; //
}
String txtPrev = "前" + pageCountSize + "页";
String txtNext = "后" + pageCountSize + "页";
String txtStart = "首页";
String txtEnd = "末页";
// 首页
// if (StartPage - 1 > 0) {
if (pageNum - 1 > 0) {
LinkText += "<a href='" + LinkPageName + "&page=1' title='到首页'>"
+ txtStart + "</a>";
} else {
// LinkText += txtStart;
LinkText += "";
}
// 到前10页
if (StartPage - 1 > 0) {
LinkText += "<a href='" + LinkPageName + "&page=" + (StartPage - 1)
+ "' title='到第" + pageCountSize + "页'>" + txtPrev + "</a>";
} else {
// LinkText += txtPrev;
LinkText += "";
}
for (int i = StartPage; i < StartPage + pageCountSize; i++) {
if (i < PageCount + 1) {
if (i == pageNum) {
LinkText += "<a class='currentlyPage' href='"
+ LinkPageName + "&page=";
LinkText += i + "' title='" + i + "页'>";
LinkText += i;
} else {
LinkText += "<a href='" + LinkPageName + "&page=";
LinkText += i + "' title='" + i + "页'>";
LinkText += i;
}
LinkText += "</a>";
}
}
// 中间页面
if (StartPage + pageCountSize - PageCount - 1 < 0) {
LinkText += "<a href='" + LinkPageName + "&page="
+ (StartPage + pageCountSize) + "' title='到第"
+ pageCountSize + "页'>" + txtNext + "</a>";
} else {
// LinkText += txtNext;
LinkText += "";
}
// 最后一页
// if (StartPage + pageCountSize <= PageCount) {
if (pageNum < PageCount) {
LinkText += "<a href='" + LinkPageName + "&page=" + PageCount
+ "' title='最后一页'>" + txtEnd + "</a>";
} else {
// LinkText += txtEnd;
LinkText += "";
}
if(recordCount < pageSize)
LinkText = "";
return LinkText;
}
}
调用例子
public PageControl getPageControl(String sql, int page, int pageSize)
throws SQLException {
List list = new ArrayList();
int start = 0;
int pageCount = 0;
int recordCount = 0;
Connection conn = null;
PreparedStatement prepare = null;
ResultSet rs = null;
ConnectionPool pool = ConnectionPool.getInstance();
try {
conn = pool.getConnection();
prepare = conn.prepareStatement(sql);
rs = prepare.executeQuery();
rs.last();
if (rs.isLast()) {
recordCount = rs.getRow();
}
rs.beforeFirst();
pageCount = (recordCount + pageSize - 1) / pageSize;
if (page > pageCount)
page = pageCount;
start = (page - 1) * pageSize + 1;
boolean bOk = true;
if (start == 1)
bOk = true;
else
bOk = rs.absolute(start - 1);
int i = 1, j = 0;
while (bOk && rs.next() && j < pageSize) {
ContentInfoForm form = new ContentInfoForm();
form.setId(rs.getLong(i));
i++;
form.setContentId(rs.getLong(i));
i++;
form.setContentTypeId(rs.getInt(i));
i++;
form.setBlogId(rs.getLong(i));
i++;
form.setBlogName(rs.getString(i));
i++;
form.setTitle(rs.getString(i));
i++;
form.setPublic(rs.getBoolean(i));
i++;
form.setReply(rs.getBoolean(i));
i++;
form.setBrowseNum(rs.getInt(i));
i++;
form.setReplyNum(rs.getInt(i));
i++;
form.setMainIndex(rs.getBoolean(i));
i++;
form.setSubIndex(rs.getBoolean(i));
i++;
form.setChoiceIndex(rs.getBoolean(i));
i++;
form.setRegDate(rs.getTimestamp(i));
list.add(form);
i = 1;
j++;
}
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
if (rs != null) {
rs.close();
}
} finally {
try {
if (prepare != null) {
prepare.close();
}
} catch (SQLException e) {
e.printStackTrace();
} finally {
if (conn != null) {
pool.free(conn);
}
}
}
}
PageControl pcontrol = new PageControl(list, recordCount, page, start,
pageSize);
return pcontrol;
}
分页例子
PageControl pControl = dao.getPageControl(sql.toString(), ipage, 20);
List list = pControl.getList();
String showPage = pControl.paging(10,
"/admin/contentTypeList.do?method=untype“;
request.setAttribute("list", list);
request.setAttribute("showPage", showPage);
request.setAttribute("search", search);
request.setAttribute("type", type);
<style>
/*---分页S---*/
#pagination_box {
clear: both;
overflow: hidden;
height: 35px;
text-align: center;
margin-top: 10px;
zoom:1;
line-height: 35px;
}
#pagination_box a {
border: 1px solid #BACBDD;
margin-right: 2px;
margin-left: 2px;
padding-top: 2px;
padding-right: 5px;
padding-bottom: 2px;
padding-left: 5px;
overflow: hidden;
font-family: "宋体";
}
#pagination_box a:link {
color: #497098;
}
#pagination_box a:visited {
color: #497098;
}
#pagination_box a:hover {
color: #FFFFFF;
background-color: #658CB4;
text-decoration: none;
}
#pagination_box a:active {
color: #497098;
}
#pagination_box .currentlyPage:link {
color: #ffffff;
background-color: #658CB4;
}
#pagination_box .currentlyPage:visited {
color: #ffffff;
background-color: #658CB4;;
}
#pagination_box .currentlyPage:hover {
color: #ffffff;
background-color: #658CB4;
}
#pagination_box .currentlyPage:active {
color: #ffffff;
background-color: #658CB4;
}
#pagination_box .PB_input {
width: 20px;
overflow: hidden;
border: 1px solid #CCCCCC;
vertical-align: middle;
}
#pagination_box .PB_but {
cursor:hand;
padding-left: 5px;
vertical-align: middle;
padding-bottom: 5px;
margin-top:4px;
}
/*---分页E---*/
</style>
<div id="pagination_box"><%=showPage %></div>
<!--分页E-->