Golang 分页函数

//分页方法,根据传递过来的页数,每页数,总数,返回分页的内容 7个页数 前 1,2,3,4,5 后 的格式返回,小于5页返回具体页数

func Paginator(page, prepage int, nums int64) map[string]interface{} {

var firstpage int //前一页地址

var lastpage int //后一页地址

//根据nums总数,和prepage每页数量 生成分页总数

totalpages := int(math.Ceil(float64(nums) / float64(prepage))) //page总数

if page > totalpages {

page = totalpages

}

if page <= 0 {

page = 1

}

var pages []int

switch {

case page >= totalpages-5 && totalpages > 5: //最后5页

start := totalpages - 5 + 1

firstpage = page - 1

lastpage = int(math.Min(float64(totalpages), float64(page+1)))

pages = make([]int, 5)

for i, _ := range pages {

pages[i] = start + i

}

case page >= 3 && totalpages > 5:

start := page - 3 + 1

pages = make([]int, 5)

firstpage = page - 3

for i, _ := range pages {

pages[i] = start + i

}

firstpage = page - 1

lastpage = page + 1

default:

pages = make([]int, int(math.Min(5, float64(totalpages))))

for i, _ := range pages {

pages[i] = i + 1

}

firstpage = int(math.Max(float64(1), float64(page-1)))

lastpage = page + 1

//fmt.Println(pages)

}

paginatorMap := make(map[string]interface{})

paginatorMap["pages"] = pages

paginatorMap["totals"] = nums

paginatorMap["totalpages"] = totalpages

paginatorMap["firstpage"] = firstpage

paginatorMap["lastpage"] = lastpage

paginatorMap["currpage"] = page

return paginatorMap

}

HTML显示:

<style>

.am-cf{

height: 50px;

margin-top: 30px;

line-height: 50px;

text-align: center;

vertical-align: middle;

margin-left: 40%;

}

.am-fr{

float: left;

line-height: 50px;

text-align: center;

vertical-align: middle;

height: 50px;

margin-top: -15px;

}

.am-pagination{

list-style:none;

height: 50px;

line-height: 50px;

text-align: center;

vertical-align: middle;

}

.am-pagination li{

float:left;

margin-left: 10px;

}

.am-pagination li a{

text-decoration:none;

}

.am-jl{

float: left;

margin-left: 20px;

}

.am-active{

color: #f00;

}

</style>

<div class="am-cf">

<div class="am-fr">

<ul class="am-pagination">

<li class=""><a href="/user?page={{.paginator.firstpage}}">«</a></li>

{{range $index,$page := .paginator.pages}}

<li {{if eq $.paginator.currpage $page }}class="am-active"{{end}}>

<a href="/user?page={{$page}}">{{$page}}</a></li>

{{end}}

<li><a href="/user?page={{.paginator.lastpage}}">»</a></li>

</ul>

</div>

<div class="am-jl">

共{{.paginator.totals}}条记录 共记{{.paginator.totalpages}} 页 当前{{.paginator.currpage}}页

</div>

</div>

</div>

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