go语言分页

package main
import (
    "fmt"
    "strconv"
)
func main() {
    fmt.Println("Hello, World!")
    var page=pagestr("http://www.abc.com?",195,11,10,8)
    fmt.Println(page)
}
//url连接，countdatas表数据总行数，currentpage第几页（0是第一页），everpage每页多少行,beforlaterln前后长度
func pagestr(url string,countdatas int,currentpage int,everpage int,beforlaterln int) string {
    var page= ""
    var intpart = countdatas / everpage //整数
    //fmt.Println("intpart")
    //fmt.Println(intpart)
    var remainderpart = countdatas%everpage //余数
    var countpage = intpart //取整数
    if(currentpage<0){ currentpage = 0 } else {currentpage = currentpage}
    if(remainderpart==0){
        if(currentpage>(countpage-1)){ currentpage = countpage-1 } else {currentpage = currentpage}
        var pp=currentpage+1
            var strbe=""
            var pagebefore=pp-beforlaterln-1
            for i := pp; i > pagebefore; i-- {
                if(i>0 && i<pp){
                    strbe = "<a class='num' href='"+url+"&p="+strconv.Itoa((i-1))+"'>"+strconv.Itoa((i))+"</a>"+strbe
                }
            }
            if(pp<=1){strbe=""}else{strbe="<a class='num' href='"+url+"&p=0'>首页</a>"+"<a class='num' href='"+url+"&p="+strconv.Itoa((pp-2))+"'>上一页</a>"+strbe}
            var strmid = "<span class='current'>"+strconv.Itoa(pp)+"</span>"
            var strlater = ""
            var pagelater = pp+beforlaterln
            for i := pp; i < pagelater; i++ {
                if(i<countpage){
                    strlater+="<a class='num' href='"+url+"&p="+strconv.Itoa(i)+"'>"+strconv.Itoa((i+1))+"</a>";
                }
            }

            if(pp>=countpage){}else{strlater+="<a class='num' href='"+url+"&p="+strconv.Itoa(pp)+"'>下一页</a>"+"<a class='num' href='"+url+"&p="+strconv.Itoa((countpage-1))+"'>尾页</a>"}
            page=strbe+strmid+strlater;
    }else{
        countpage+=1;//总页数
        if(currentpage>(countpage-1)){ currentpage = countpage-1 } else {currentpage = currentpage}
        var pp=currentpage+1
        var strbe=""
        var pagebefore=pp-beforlaterln-1
        for i := pp; i > pagebefore; i-- {
            if(i>0 && i<pp){
                strbe = "<a class='num' href='"+url+"&p="+strconv.Itoa((i-1))+"'>"+strconv.Itoa((i))+"</a>"+strbe
            }
        }
        if(pp<=1){strbe=""}else{strbe="<a class='num' href='"+url+"&p=0'>首页</a>"+"<a class='num' href='"+url+"&p="+strconv.Itoa((pp-2))+"'>上一页</a>"+strbe}
        var strmid = "<span class='current'>"+strconv.Itoa(pp)+"</span>"
        var strlater = ""
        var pagelater = pp+beforlaterln
        for i := pp; i < pagelater; i++ {
            if(i<countpage){
                strlater+="<a class='num' href='"+url+"&p="+strconv.Itoa(i)+"'>"+strconv.Itoa((i+1))+"</a>";
            }
        }

        if(pp>=countpage){}else{strlater+="<a class='num' href='"+url+"&p="+strconv.Itoa(pp)+"'>下一页</a>"+"<a class='num' href='"+url+"&p="+strconv.Itoa((countpage-1))+"'>尾页</a>"}
        page=strbe+strmid+strlater;
    }
    return  "共"+strconv.Itoa(countpage)+"页"+page
}

共20页<a class='num' href='http://www.abc.com?&p=0'>首页</a>
<a class='num' href='http://www.abc.com?&p=10'>上一页</a>
<a class='num' href='http://www.abc.com?&p=3'>4</a>
<a class='num' href='http://www.abc.com?&p=4'>5</a>
<a class='num' href='http://www.abc.com?&p=5'>6</a>
<a class='num' href='http://www.abc.com?&p=6'>7</a>
<a class='num' href='http://www.abc.com?&p=7'>8</a>
<a class='num' href='http://www.abc.com?&p=8'>9</a>
<a class='num' href='http://www.abc.com?&p=9'>10</a>
<a class='num' href='http://www.abc.com?&p=10'>11</a>
<span class='current'>12</span>
<a class='num' href='http://www.abc.com?&p=12'>13</a>
<a class='num' href='http://www.abc.com?&p=13'>14</a>
<a class='num' href='http://www.abc.com?&p=14'>15</a>
<a class='num' href='http://www.abc.com?&p=15'>16</a>
<a class='num' href='http://www.abc.com?&p=16'>17</a>
<a class='num' href='http://www.abc.com?&p=17'>18</a>
<a class='num' href='http://www.abc.com?&p=18'>19</a>
<a class='num' href='http://www.abc.com?&p=19'>20</a>
<a class='num' href='http://www.abc.com?&p=12'>下一页</a>
<a class='num' href='http://www.abc.com?&p=19'>尾页</a>