本篇介绍JFinal项目的列表分页的功能实现。
JFinal列表分页
添加Page类
在前篇JFinal项目的基础上。新建一个Page类,提供一些Page的操作。
/// <summary>
/// Page类
/// </summary>
public class Page {
/// <param name="pageSize">页面大小</param>
/// <param name="pageIndex">页面索引</param>
/// <param name="pageCount">页面数量</param>
/// <param name="count">List数量</param>
public static int pageSize = 9;
private int pageIndex;
private int pageCount;
private int count;
public Page(int pageIndex,int count){
if(count%pageSize==0){
this.pageCount = count/pageSize;
}else{
this.pageCount = count/pageSize+1;
}
if(pageIndex>pageCount){
pageIndex = pageCount;
}
if(pageIndex<1){
pageIndex = 1;
}
this.pageIndex = pageIndex;
this.count = count;
}
public Page(int pageSize,int pageIndex,int count){
this.pageSize = pageSize;
if(count%pageSize==0){
this.pageCount = count/pageSize;
}else{
this.pageCount = count/pageSize+1;
}
if(pageIndex>pageCount){
pageIndex = pageCount;
}
if(pageIndex<1){
pageIndex = 1;
}
this.pageIndex = pageIndex;
this.count = count;
}
public int getPageSize() {
return pageSize;
}
public void setPageSize(int pageSize) {
this.pageSize = pageSize;
}
public int getPageIndex() {
return pageIndex;
}
public void setPageIndex(int pageIndex) {
this.pageIndex = pageIndex;
}
public int getPageCount() {
return pageCount;
}
public void setPageCount(int pageCount) {
this.pageCount = pageCount;
}
public int getCount() {
return count;
}
public void setCount(int count) {
this.count = count;
}
}
添加接口,获取List
在原HelloController基础上添加方法IofoList.
HelloService.java:
static int count = 0;
/// <summary>
/// 获取总数量
/// </summary>
public static int getCount(){
String sql="select count(*) as count from dbName";
count = Integer.parseInt(Db.findFirst(sql).getLong("count").toString());
return count;
}
/// <summary>
/// 获取当前页面列表
/// </summary>
public static List<Record> get(Page page) {
List<Record> list = null;
int start = (page.getPageIndex() - 1) * page.getPageSize();
int pageSize = page.getPageSize();
String sql = "select * from dbName limit "+start+","+pageSize+" ";
list = Db.find(sql);
return list;
}
HelloController.java:
public void IofoList(){
// 获取页面参数 < pageIndex >页面索引值
int pageIndex = getParaToInt("pageIndex");
// 获取总数量
int count = HelloService.getCount();
Page page = new Page(Page.pageSize, pageIndex, count);
List<Record> list = HelloService.get(page);
Record pageInfo = new Record();
pageInfo.set("count", page.getCount()).set("pageIndex", page.getPageIndex()).set("pageCount", page.getPageCount());
// 返回 JSON <list>当前页面的list;
// <pageInfo>页面信息: <count>list总数,<pageCount>页面总数,<pageIndex>当前页面索引
renderJson(new Record().set("list", list).set("pageInfo", pageInfo));
}
接口传来的数据：
调用接口
page.html:
<body>
<div class="table-inner">
<div class="table-head">
<table>
<thead>
<tr>
<th>List1</th>
<th>List2</th>
<th>List3</th>
</tr>
</thead>
</table>
</div>
<div class="table-body">
<table>
<tbody id="tbody">
<tr>
<td>1</td>
<td>2</td>
<td>3</td>
</tr>
</tbody>
</table>
</div>
<div class="page-wrap">
<div class="page-info">
<span>共有:</span><span id="listCount">1</span><span>条</span>
<span>共有:</span><span id="pageCount">1</span><span>页</span>
<span>页面显示:</span><span id="currentCount">1</span> <span>条</span>
<span class="current " id="firstPage"><<</span>
<span class="current " id="PreviousPage"><</span>
<span class="current " id="pageIndex">1</span>
<span class="current " id="nextPage">></span>
<span class="current " id="lastPage">>></span>
<input type="text" id="go_index" />
<span class="current" id="go">GO</span>
</div>
</div>
</div>
</body>
page.js:
<script type="text/javascript">
// 存页面索引 及总页数
var pageIndex = 1,pageCount;
$(document).ready(function(){
Page();
//首页
$("#firstPage").click(function(){
pageIndex = 1;
Page();
});
//上一页
$("#PreviousPage").click(function(){
pageIndex = pageIndex - 1;
if(pageIndex == 0){
pageIndex = 1;
}
Page();
});
//下一页
$("#nextPage").click(function(){
pageIndex = pageIndex + 1;
if(pageIndex >= pageCount){
pageIndex = pageCount;
}
Page();
});
//尾页
$("#lastPage").click(function(){
pageIndex = pageCount;
Page();
});
// Go
$("#go").click(function(){
var _index = $("#go_index").val().trim();
if( _index > 0 && _index <= pageCount){
pageIndex = _index;
}else {
alert("请输入正确页码");
}
Page();
$("#go_index").val("");
});
});
function Page(){
$.post("hello/IofoList",{pageIndex:pageIndex},function(data){
console.log(data);
var _html = "";
var _list = data.list;
if( _list.length != 0 && _list.length != null){
for(var _i =0 ;_i<_list.length;_i++){
var _list_ = _list[_i];
_html += "<tr><td>"+(_list_.id == null?"":_list_.id)+"</td>"+
"<td>"+(_list_.caseId == null?"":_list_.caseId)+"</td>"+
"<td>"+(_list_.imgId == null?"":_list_.imgId)+"</td></tr>";
}
$("#tbody").empty();
$("#tbody").append(_html);
var _page = data.pageInfo;
pageCount = _page.pageCount;
$("#listCount").html(_page.count);
$("#pageCount").html(pageCount);
$("#currentCount").html(_list.length);
$("#pageIndex").html(pageIndex);
}else{
alert("暂无数据");
}
});
}
</script>
点击尾页:
