go实现分页

效果如下：

QQ图片20200328162525.png

QQ截图20200328162620.png

代码如下：

import (
    "math"
)

type Page struct {
    CurrentPage int64   //当前页码
    PageSize    int64   //每页条数
    TotalPage   int64   //总条数
    Nums        []int64 //分页序数
    PageCount   int64   //总页数
}
func (_ Page) CreatePage(currentPage, pageSize, total int64) Page {
    if currentPage < 1 {
        currentPage = 1
    }
    if pageSize < 1 {
        pageSize = 1
    }
    this := Page{}
    this.CurrentPage = currentPage
    this.PageSize = pageSize
    this.TotalPage = total
    this.PageCount = int64(math.Ceil((float64(total)) / float64(pageSize)))
    this.setNum()
    return this
}

//设置序号
func (this *Page) setNum() {
    this.Nums = []int64{}
    if this.PageCount == 0 {
        return
    }
    var begin int64 = 1
    var end int64 = 5
    if this.PageCount <= 5 {
        end = this.PageCount
    } else {
        begin = this.CurrentPage - 2
        end = this.CurrentPage + 2
        if begin <= 0 {
            begin = 1
            end = 5
        }
        if end >= this.PageCount {
            end = this.PageCount
            begin = end - 4
        }
    }
    for i := begin; i <= end; i++ {
        this.Nums = append(this.Nums, i)
    }
}