Go Language (Golang) fast implementation of a bootstrap-style page link

This is a creation in Article, where the information may have evolved or changed.

Write a rough, direct write dead link style, code can be further encapsulated, add some custom configuration items

The code is as follows:

Package Utilsimport ("FMT" "Math" "net/http" "Net/url" "StrConv" "strings")//pagination pager type pagination struct { Request *http. Requesttotal intpernum int}//newpagination New Page splitter func newpagination (req *http. Request, total int, pernum int) *pagination {return &pagination{request:req,total:total,pernum:pernum,}}//pages Rendering generates HTML paging tags func (P *pagination) Pages () string {queryparams: = P.request.url.query ()//Get pagepage from the current request: = Queryparams.get ("page") if page = = "" {page = "1"}//converts the page number to Integer to calculate pagenum, _: = StrConv. Atoi (page) If Pagenum = = 0 {return ""}//calculates the total number of pages var totalpagenum = int (math. Ceil (Float64 (p.total)/float64 (P.pernum))//Home link var firstLink string//previous link var prevlink string//next link var nextLink string//last link var lastlink string//median page link var pagelinks []string//Home and previous link if pagenum > 1 {firstLink = FMT. Sprintf (' <li><a href= '%s ' > Home </a></li> ', P.pageurl ("1")) Prevlink = Fmt. Sprintf (' <li><a href= '%s ' > Prev </a></li> ', P.pageurl (StrConv. Itoa (Pagenum-1))} else {firstLink = ' <li class= "disabled" ><a href= "#" > Home </a></li> ' prevlink = ' <li class= "Disabled" ><a href= "#" > Prev </a></li> '}//last and Next if Pagenum < totalpagenum {Lastlink = fmt. Sprintf (' <li><a href= '%s ' > Last </a></li> ', P.pageurl (StrConv. Itoa (totalpagenum)) NextLink = Fmt. Sprintf (' <li><a href= '%s ' > Next </a></li> ', P.pageurl (StrConv. Itoa (pagenum+1))} else {lastlink = ' <li class= ' disabled ' ><a href= ' # ' > End </a></li> ' nextLink = ' <li class= "Disabled" ><a href= "#" > Next </a></li> '}//generate an intermediate page link pagelinks = make ([]string, 0, 10) Startpos: = Pagenum-3endpos: = pagenum + 3if Startpos < 1 {endpos = endpos + int (math. Abs (Float64 (startpos))) + 1startPos = 1}if endpos > totalpagenum {endpos = totalpagenum}for i: = startpos; I <= Endpos; i++ {var s stringif i = = Pagenum {s = fmt. Sprintf (' <li class= ' active ' ><a href= '%s ' >%d</a></li> ', P.pageurl (StrConv. Itoa (i)), I)} else {s = fmt. Sprintf (' <li><a href= '%s ' >%d</a></li> ', P.pageurl (StrConv. Itoa (i)), i)}pagelinks = append (Pagelinks, s)}return FMT. Sprintf (' <ul class= ' pagination ' >%s%s%s%s%s</ul> ', FirstLink, Prevlink, strings. Join (Pagelinks, ""), NextLink, lastlink)}//pageurl Raw ingredient page Urlfunc (P *pagination) pageurl (page string) string {// Creates a new URL object based on the current URL u, _: = URL. Parse (p.request.url.string ()) Q: = U.query () q.set ("page", page) U.rawquery = Q.encode () return u.string ()}

How to use:

package main...import "你项目的路径/utils"import "github.com/gin-gonic/gin"import "html/template"...func main() {    ...    r := gin.Default()    r.GET("/", func(c *gin.context){          //创建一个分页器，一万条数据，每页30条          pagination := utils.NewPagination(c.Request, 10000, 30)           //传到模板中需要转换成template.HTML类型，否则html代码会被转义          c.HTML(200,"你的模板",gin.H{"pages":template.HTML(pagination.Pages())})      })        }

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