JSP实现带查询条件的通用分页组件

<!-- 分页内容 -->
 <%@include file="/web-inf/decorators/pagination.jsp" %>
<!-- 分页内容结束 -->

@requirespermissions("func_vasadmin_usermoneylist")
@requestmapping("/user/money/list")
public string list(model model, servletrequest request) {
 
 // 获取所有的查询条件参数（为了使用方便，所有查询条件的参数命名前缀都是"search_"）
 map<string, object> searchparams = webutils.getparametersstartingwith(request, "search_");
 
 // 获取分页页码信息和每页条数
 int pagenum = pageutil.gettargetpage(request);
 int pagesize = pageutil.getpagesize(request);
 page page = new page(pagesize, pagenum);
 
 // 查询需要展示的内容
 list<usermoney> list = vasmoneyservice.getusermoneylist(page,searchparams);
 
 model.addattribute("data", list);
 model.addattribute("page", page);
 // 将搜索条件编码成字符串，用于排序，分页的url
 model.addattribute("searchparams", pageutil.encodeparameterstringwithprefix(searchparams, "search_"));
 
 return "vasadmin/user_money_list";
}

public list<usermoney> getusermoneylist(page page,
 map<string, object> searchparams) {

 // 从map中获取查询条件
 long userid = (long) dataconvertutil.data2(searchparams.get("userid"),
 dataconvertutil.datatype.long);
 long minmoney = (long) dataconvertutil.data2(
 searchparams.get("minmoney"), dataconvertutil.datatype.long);
 long maxmoney = (long) dataconvertutil.data2(
 searchparams.get("maxmoney"), dataconvertutil.datatype.long);

 // 查询总条数
 int totleelements = vasmoneydao.getusermoneylistcount(
 databasename.db_tata_money, userid, minmoney, maxmoney);
 // 设置总条数
 page.settotleelements(totleelements);

 // 查询需要展示的数据
 return vasmoneydao.getusermoneylist(databasename.db_tata_money, userid,
 minmoney, maxmoney, page.getstartnum(), page.getendnum());
}

<%@ page language="java" pageencoding="utf-8"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ taglib prefix="fn" uri="http://java.sun.com/jsp/jstl/functions" %>

<!-- 分页信息 -->
<div class="row">
 <div class="col-md-3 page-number">
 每次显示 <select class="form-control input-mini"
 onchange="self.location.href=options[selectedindex].value">
 <option value="?pagenum=1&pagesize=10&${searchparams}"
 <c:if test="${page.pagesize eq '10' }">selected</c:if>>10</option>
 <option value="?pagenum=1&pagesize=50&${searchparams}"
 <c:if test="${page.pagesize eq '50' }">selected</c:if>>50</option>
 <option value="?pagenum=1&pagesize=100&${searchparams}"
 <c:if test="${page.pagesize eq '100' }">selected</c:if>>100</option>

 </select> 条
 </div>

 <div class="col-md-9 paging">
 <ul class="pagination">
 <li><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >共 ${page.totlepages} 页，${page.totleelements}
 条</a></li>
 <c:if test="${page.hasprevious == false}">
 <li class="disabled"><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >首页</a></li>
 <li class="disabled"><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >上一页</a></li>
 </c:if>
 <c:if test="${page.hasprevious == true}">
 <li><a
 href="?pagenum=1&pagesize=${page.pagesize}&${searchparams}" rel="external nofollow" >首页</a></li>
 <li><a
 href="?pagenum=${page.prepage}&pagesize=${page.pagesize}&${searchparams}" rel="external nofollow" >上一页</a></li>
 </c:if>

 <c:foreach var="i" begin="${page.begin}" end="${page.end}">
 <c:choose>
 <c:when test="${i == page.pagenum}">
 <li class="active"><a
 href="?pagenum=${i}&pagesize=${page.pagesize}&${searchparams}" rel="external nofollow" rel="external nofollow" >${i}</a></li>
 </c:when>
 <c:otherwise>
 <li><a
 href="?pagenum=${i}&pagesize=${page.pagesize}&${searchparams}" rel="external nofollow" rel="external nofollow" >${i}</a></li>
 </c:otherwise>
 </c:choose>
 </c:foreach>
 <c:if test="${page.hasnext == true}">
 <li><a
 href="?pagenum=${page.nextpage}&pagesize=${page.pagesize}&${searchparams}" rel="external nofollow" >下一页</a></li>
 <li><a
 href="?pagenum=${page.totlepages}&pagesize=${page.pagesize}&${searchparams}" rel="external nofollow" >末页</a></li>
 </c:if>
 <c:if test="${page.hasnext == false}">
 <li class="disabled"><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >下一页</a></li>
 <li class="disabled"><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >末页</a></li>
 </c:if>

 </ul>

 </div>
</div>
<!-- 分页信息结束 -->

public class page implements serializable {

 private static final long serialversionuid = 1l;
 
 public page(int pagesize, int pagenum) {
 if(pagesize > 0 ){
 this.pagesize = pagesize;
 }
 if(pagenum > 0){
 this.pagenum = pagenum;
 }
 }

 /**
 * 初始化各个值
 */
 public void initvalue(){
 // 计算总共有多少页
 totlepages = (int)math.ceil(totleelements * 1.0 / pagesize);
 
 if(totlepages == 0){
 totlepages = 1;
 }
 
 // 页码矫正
 if(pagenum <= 0){
 pagenum = 1;
 }
 if(pagenum > totlepages){
 pagenum = totlepages;
 }
 
 // 是否有上一页和首页
 if(pagenum > 1){
 hasprevious = true;
 prepage = pagenum - 1;
 }
 
 // 是否有下一页和尾页
 if(totlepages > pagenum){
 hasnext = true;
 nextpage = pagenum + 1;
 }
 
 // 分页页码开始数值
 begin = math.max(1, pagenum - paginationsize/2);
 
 // 分页页码结束数值
 end = math.min(begin + (paginationsize - 1), totlepages);
 }
 
 /**
 * 分页下标最多显示多少页
 */
 private int paginationsize = 10;
 /**
 * 页码开始
 */
 private int begin = 1;
 /**
 * 页码结束
 */
 private int end = 1;
 /**
 * 每页显示多少条
 */
 private int pagesize = 15;
 /**
 * 当前页码
 */
 private int pagenum = 1;
 /**
 * 是否有下一页
 */
 private boolean hasnext = false;
 /**
 * 是否有上一页
 */
 private boolean hasprevious = false;
 /**
 * 下一页的页码
 */
 private int nextpage;
 /**
 * 上一页的页码
 */
 private int prepage;
 /**
 * 总页数
 */
 private int totlepages = 1;
 /**
 * 总条数
 */
 private int totleelements = 0;
 
 public static int maxnum = 999999;

 public int getpaginationsize() {
 return paginationsize;
 }
 public void setpaginationsize(int paginationsize) {
 this.paginationsize = paginationsize;
 }
 public int getbegin() {
 return begin;
 }
 public void setbegin(int begin) {
 this.begin = begin;
 }
 public int getend() {
 return end;
 }
 public void setend(int end) {
 this.end = end;
 }
 public int getpagesize() {
 return pagesize;
 }
 public void setpagesize(int pagesize) {
 this.pagesize = pagesize;
 }
 public int getpagenum() {
 return pagenum;
 }
 public void setpagenum(int pagenum) {
 this.pagenum = pagenum;
 }
 public boolean ishasnext() {
 return hasnext;
 }
 public void sethasnext(boolean hasnext) {
 this.hasnext = hasnext;
 }
 public boolean ishasprevious() {
 return hasprevious;
 }
 public void sethasprevious(boolean hasprevious) {
 this.hasprevious = hasprevious;
 }
 public int getnextpage() {
 return nextpage;
 }
 public void setnextpage(int nextpage) {
 this.nextpage = nextpage;
 }
 public int getprepage() {
 return prepage;
 }
 public void setprepage(int prepage) {
 this.prepage = prepage;
 }
 public int gettotlepages() {
 return totlepages;
 }
 public void settotlepages(int totlepages) {
 this.totlepages = totlepages;
 }
 public int gettotleelements() {
 return totleelements;
 }
 public void settotleelements(int totleelements) {
 this.totleelements = totleelements;
 // 知道总条数之后，初始化一下其它值
 initvalue();
 }
 
 public static void main(string[] args) {
 system.out.println(math.min(1, 2));
 }
 
 /**
 * 从第几条开始查询
 * @return
 */
 public int getstartnum(){
 return (pagenum -1) * pagesize + 1;
 }
 
 /**
 * 到第几条结束
 * @return
 */
 public int getendnum(){
 return pagenum * pagesize;
 }
}

public class pageutil implements serializable {

 private static final long serialversionuid = 1l;
 
 /**
 * 获取目标页码
 * @return
 */
 public static int gettargetpage(servletrequest request){
 
 int pagenum = 0;
 
 string pagenumstr = request.getparameter("pagenum");
 
 if(stringutils.isnotblank(pagenumstr)){
 try{
 pagenum = integer.valueof(pagenumstr);
 }catch(exception e){
 pagenum = 0;
 }
 }
 
 return pagenum;
 }
 
 /**
 * 获取每页条数
 * @return
 */
 public static int getpagesize(servletrequest request){
 
 int pagesize = 0;
 
 string pagesizestr = request.getparameter("pagesize");
 
 if(stringutils.isnotblank(pagesizestr)){
 try{
 pagesize = integer.valueof(pagesizestr);
 }catch(exception e){
 pagesize = 0;
 }
 }
 
 return pagesize;
 }
 
 /**
 * 将map中的查询条件，加上前缀，以&拼接
 * @param map
 * @param prefix 每个参数的前缀
 * @return
 */
 public static string encodeparameterstringwithprefix(map<string,object> map, string prefix){
 
 if(null == map || map.isempty()){
 return "";
 }
 
 stringbuffer sb = new stringbuffer();
 
 iterator<map.entry<string,object>> entries = map.entryset().iterator();
 
 while (entries.hasnext()) {
 
 if(stringutils.isnotempty(sb.tostring())){
 sb.append("&");
 }
 
 map.entry<string,object> entry = entries.next();
 
 sb.append(prefix);
 sb.append(entry.getkey());
 sb.append("=");
 sb.append(entry.getvalue());
 
 } 
 
 return sb.tostring();
 
 }

}

<!-- 查询条件 -->
<div class="col-md-10 search">

 <form class="form-inline" action="${ctx }/vasadmin/user/money/list"
 method="get">
 <div class="form-group">
 <input type="text" class="form-control input-sm"
 name="search_userid" value="${param.search_userid }"
 placeholder="用户id"
 onkeyup="this.value=this.value.replace(/\d/g,'')"
 onafterpaste="this.value=this.value.replace(/\d/g,'')">
 </div>
 <div class="form-group">
 <input type="text" class="form-control input-sm"
 name="search_minmoney" value="${param.search_minmoney }"
 placeholder="最小余额"
 onkeyup="this.value=this.value.replace(/\d/g,'')"
 onafterpaste="this.value=this.value.replace(/\d/g,'')">
 </div>
 <div class="form-group">
 <input type="text" class="form-control input-sm"
 name="search_maxmoney" value="${param.search_maxmoney }"
 placeholder="最大余额"
 onkeyup="this.value=this.value.replace(/\d/g,'')"
 onafterpaste="this.value=this.value.replace(/\d/g,'')">
 </div>
 <div class="form-group">
 <button type="submit" class="btn btn-primary btn-sm">
 <span class="glyphicon glyphicon-search"></span> 搜索
 </button>
 </div>
 </form>

</div>
<!-- /查询条件 -->