golang 的一个分页方法

需要做一分页。。就做了个方法，beego里的例子太麻烦了。还是弄个简单的吧，上代码。。

//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["totalpages"] = totalpages
    paginatorMap["firstpage"] = firstpage
    paginatorMap["lastpage"] = lastpage
    paginatorMap["currpage"] = page
    return paginatorMap
}

html是这样的：

  <div class="am-cf">
  共{{.totals}}条记录 共记{{.paginator.totalpages}} 页 当前页  {{.paginator.currpage}}
  <div class="am-fr">
    <ul class="am-pagination">
    <li class=""><a href="/clubadmin/topics/{{.paginator.firstpage}}">«a>li> 
    {{range $index,$page := .paginator.pages}}
      <li  {{if eq $.paginator.currpage $page }}class="am-active"{{end}}><a href="/clubadmin/topics/{{$page}}">{{$page}}a>li>  
    {{end}}
      <li><a href="/clubadmin/topics/{{.paginator.lastpage}}">»a>li>
    ul>
  div>
div>

controller里是这样的：

res := models.Paginator(pa, pre_page, totals)
this.Data["paginator"] = res

本文转载自CSDN文章：golang的一个分页方法