62 lines
1.1 KiB
Go
62 lines
1.1 KiB
Go
package app
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type Page[T any] struct {
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// 当前页码
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PageNum int64 `json:"pageNum"`
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//每页显示条数
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PageSize int64 `json:"pageSize"`
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// 总数量
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Total int64 `json:"total"`
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// 总页数
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TotalPage int64 `json:"totalPage"`
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// 数据列表
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List []T `json:"list"`
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}
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// Paginator 生成新的分页数据对象
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func Paginator[T any](items *Page[T], total, pageNum, pageSize int64) *Page[T] {
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var (
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pageStart int64
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pageEnd int64
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)
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if pageNum <= 0 {
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pageNum = 1
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}
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if pageSize <= 0 {
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pageSize = 10
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}
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//总页数
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totalPages := total / pageSize
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if (total % pageSize) > 0 {
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totalPages += 1
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}
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if pageNum*pageSize < total {
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pageEnd = pageNum * pageSize
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pageStart = pageEnd - pageSize
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} else {
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pageEnd = total
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pageStart = pageSize * (totalPages - 1)
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}
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if pageEnd > total {
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pageEnd = total
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}
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if total <= 0 {
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items.List = make([]T, 0)
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} else {
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items.List = items.List[pageStart:pageEnd]
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}
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return &Page[T]{
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PageNum: pageNum,
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PageSize: pageSize,
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TotalPage: totalPages,
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Total: total,
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List: items.List,
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}
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}
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