golang实现分页算法实例代码

//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}

func main(){ pageSize := 3  var rsCount int64 = 100 currentPage := 8 res := Paginator(currentPage,pageSize,rsCount) fmt.Println(res) }