goland web beego gin 网页分页

• secondar • 0条评论 •

上代码





package paging

/**
 * 分页功能
 * 支飞亚
 * 2014-9-1
 */
import (
   "fmt"
   "strings"
)

const (
   RecPageNumber   = "{{RecPageNumber}}"
   RecLabelHref    = "{{RecLabelHref}}"
   RecJoinStr      = "{{RecJoinStr}}"
   RecDisabledAttr = "{{RecDisabledAttr}}"
)

type PageOptions struct {
   EnableFirstLastLink bool   //是否启用首尾连接 默认false 建议开启
   EnablePreNexLink    bool   //是否启用上一页,下一页连接 默认false 建议开启
   Total               int    // 总条数
   TotalPages          int    // 总页数
   PageHtml            string // 分页html
   LinkItemCount       int    //生成A标签的个数 默认10个
   CurrentPage         int    //当前页 ,默认1 每次分页,必须在前台设置新的页数,不设置始终默认1
   PageSize            int    //页面大小,默认20
   ParamName           string //参数名称  默认是page
   Href                string //A标签的链接地址 参数自行拼接  例如  /list?key=关键词&a=a...paging.RecJoinStr
   RecJoinStr          string //翻页参数 自行拼接 例如 &page=paging.RecPageNumber
   Label               string // 页码按钮标签 例如 <a class="button"  href="paging.RecLabelHref" ... >paging.RecPageNumber</a>
   CurrLabel           string // 页码按钮标签 例如 <a class="button current"> paging.LabelAttr href="paging.RecLabelHref" ... >paging.RecPageNumber</a>
   HeaderHtml          string // 头部html  例如  <div> 页码 </div> 中的 <div>
   FooterHtml          string // 头部html  例如  <div> 页码 </div> 中的 </div>
   DisabledAttr        string // "disabled="disabled"  style='pointer-events:none;'"
   PreviousPageLabel   string // 上一页标签 <a class="button current" paging.RecDisabledAttr > paging.LabelAttr href="paging.RecLabelHref" >上一页</a>
   NextPageLabel       string // 下一页标签 <a class="button current" paging.RecDisabledAttr > paging.LabelAttr href="paging.RecLabelHref" >下一页</a>
   FirstPageLabel      string // 首页标签 <a class="button current" paging.RecDisabledAttr > paging.LabelAttr href="paging.RecLabelHref" >首页</a>
   LastPageLabel       string // 尾页标签 <a class="button current" paging.RecDisabledAttr > paging.LabelAttr href="paging.RecLabelHref" >尾页</a>
}

// 计算总页数 pageSize 页面大小  total 总条数
func (po *PageOptions) getTotalPages() {
   if po.PageSize == 0 {
      po.PageSize = 20
   }
   if po.Total <= po.PageSize {
      po.TotalPages = 1
   } else if po.Total > po.PageSize {
      temp := po.Total / po.PageSize
      if (po.Total % po.PageSize) != 0 {
         temp = temp + 1
      }
      po.TotalPages = temp
   }
}

/* 设置分页
示例
po := paging.PageOptions{}
po.EnablePreNexLink = true
po.EnableFirstLastLink = true
po.LinkItemCount = 20
po.CurrentPage = 7
po.PageSize = 10
po.Total = 100
po.Href = "/list?key=关键词&a=a" + paging.RecJoinStr
po.RecJoinStr = "&page=" + paging.RecPageNumber
po.Label = `<a class="button" href="` + paging.RecLabelHref + `">` + paging.RecPageNumber + `</a>`
po.CurrLabel = `<a class="button current" href="` + paging.RecLabelHref + `">` + paging.RecPageNumber + `</a>`
po.HeaderHtml = "<div>"
po.FooterHtml = "</div>"
po.DisabledAttr = "disabled=\"disabled\"  style='pointer-events:none;'"
po.PreviousPageLabel = `<a ` + paging.RecDisabledAttr + ` href="` + paging.RecLabelHref + `" >上一页</a>`
po.NextPageLabel = `<a ` + paging.RecDisabledAttr + ` href="` + paging.RecLabelHref + `" >下一页</a>`
po.FirstPageLabel = `<a ` + paging.RecDisabledAttr + ` href="` + paging.RecLabelHref + `" >首页</a>`
po.LastPageLabel = `<a ` + paging.RecDisabledAttr + ` href="` + paging.RecLabelHref + `" >尾页</a>`
po.GetPagerLinks()
_fmt.println(po.PageHtml)
*/
func (po *PageOptions) GetPagerLinks() {
   po.Href = strings.Replace(po.Href, RecJoinStr, "%v", -1)
   po.RecJoinStr = strings.Replace(po.RecJoinStr, RecPageNumber, "%v", -1)
   po.Label = strings.Replace(po.Label, RecLabelHref, "%v", -1)
   po.Label = strings.Replace(po.Label, RecPageNumber, "%v", -1)
   po.CurrLabel = strings.Replace(po.CurrLabel, RecLabelHref, "%v", -1)
   po.CurrLabel = strings.Replace(po.CurrLabel, RecPageNumber, "%v", -1)
   po.PreviousPageLabel = strings.Replace(po.PreviousPageLabel, RecDisabledAttr, "%v", -1)
   po.PreviousPageLabel = strings.Replace(po.PreviousPageLabel, RecLabelHref, "%v", -1)
   po.NextPageLabel = strings.Replace(po.NextPageLabel, RecDisabledAttr, "%v", -1)
   po.NextPageLabel = strings.Replace(po.NextPageLabel, RecLabelHref, "%v", -1)
   po.FirstPageLabel = strings.Replace(po.FirstPageLabel, RecDisabledAttr, "%v", -1)
   po.FirstPageLabel = strings.Replace(po.FirstPageLabel, RecLabelHref, "%v", -1)
   po.LastPageLabel = strings.Replace(po.LastPageLabel, RecDisabledAttr, "%v", -1)
   po.LastPageLabel = strings.Replace(po.LastPageLabel, RecLabelHref, "%v", -1)
   po.getTotalPages()
   po.SetDefault()
   if po.TotalPages <= po.LinkItemCount {
      po.PageHtml = po.type1() //显示完全  12345678910
   } else if po.TotalPages > po.LinkItemCount {
      if po.CurrentPage < po.LinkItemCount {
         po.PageHtml = po.type2() //123456789...200
      } else {
         if po.CurrentPage+po.LinkItemCount < po.TotalPages {
            po.PageHtml = po.type3()
         } else {
            po.PageHtml = po.type4()
         }
      }
   }
}

/**
 * 设置默认值
 */
func (po *PageOptions) SetDefault() *PageOptions {
   if po.CurrentPage >= po.TotalPages {
      po.CurrentPage = po.TotalPages
   }
   if po.CurrentPage <= 1 {
      po.CurrentPage = 1
   }
   if po.LinkItemCount == 0 {
      po.LinkItemCount = 10
   }
   if po.PageSize == 0 {
      po.PageSize = 20
   }
   if len(po.ParamName) <= 0 {
      po.ParamName = "page"
   }
   return po
}

/**
 * 1...197 198 199 200
 */
func (po *PageOptions) type4() string {
   var rs string = ""
   rs += po.getHeader()
   RecJoin := fmt.Sprintf(po.RecJoinStr, 1)
   Href := fmt.Sprintf(po.Href, RecJoin)
   Label := fmt.Sprintf(po.Label, Href, 1)
   rs += Label
   Label = fmt.Sprintf(po.Label, "", "...")
   rs += Label
   for i := po.TotalPages - po.LinkItemCount; i <= po.TotalPages; i++ {
      if po.CurrentPage != i {
         RecJoin = fmt.Sprintf(po.RecJoinStr, i)
         Href = fmt.Sprintf(po.Href, RecJoin)
         Label = fmt.Sprintf(po.Label, Href, i)
         rs += Label
      } else {
         RecJoin = fmt.Sprintf(po.RecJoinStr, i)
         Href = fmt.Sprintf(po.Href, RecJoin)
         Label = fmt.Sprintf(po.CurrLabel, Href, i)
         rs += Label
      }
   }
   rs += po.getFooter()
   return rs

}

/**
 * 1...6 7 8 9 10 11 12  13  14 15... 200
 */
func (po *PageOptions) type3() string {
   var rs string = ""
   rs += po.getHeader()
   RecJoin := fmt.Sprintf(po.RecJoinStr, 1)
   Href := fmt.Sprintf(po.Href, RecJoin)
   Label := fmt.Sprintf(po.Label, Href, 1)
   rs += Label
   Label = fmt.Sprintf(po.Label, "", "...")
   rs += Label
   for i := po.CurrentPage - po.LinkItemCount/2 + 1; i <= po.CurrentPage+po.LinkItemCount/2-1; i++ {
      if po.CurrentPage != i {
         RecJoin = fmt.Sprintf(po.RecJoinStr, i)
         Href = fmt.Sprintf(po.Href, RecJoin)
         Label = fmt.Sprintf(po.Label, Href, i)
         rs += Label
      } else {
         RecJoin = fmt.Sprintf(po.RecJoinStr, i)
         Href = fmt.Sprintf(po.Href, RecJoin)
         Label = fmt.Sprintf(po.CurrLabel, Href, i)
         rs += Label
      }
   }
   Label = fmt.Sprintf(po.Label, "", "...")
   rs += Label
   RecJoin = fmt.Sprintf(po.RecJoinStr, po.TotalPages)
   Href = fmt.Sprintf(po.Href, RecJoin)
   Label = fmt.Sprintf(po.Label, Href, po.TotalPages)
   rs += Label
   rs += po.getFooter()
   return rs

}

/**
 * po.TotalPages > po.LinkItemCount   po.CurrentPage < po.LinkItemCount
 * 123456789...200
 */
func (po *PageOptions) type2() string {
   var rs string = ""
   rs += po.getHeader()
   for i := 1; i <= po.LinkItemCount+1; i++ {
      if i == po.LinkItemCount {
         RecJoin := fmt.Sprintf(po.RecJoinStr, i)
         Href := fmt.Sprintf(po.Href, RecJoin)
         Label := fmt.Sprintf(po.Label, Href, "...")
         rs += Label
      } else if i == po.LinkItemCount+1 {

         RecJoin := fmt.Sprintf(po.RecJoinStr, po.TotalPages)
         Href := fmt.Sprintf(po.Href, RecJoin)
         Label := fmt.Sprintf(po.Label, Href, po.TotalPages)
         rs += Label
      } else {
         if po.CurrentPage != i {
            RecJoin := fmt.Sprintf(po.RecJoinStr, i)
            Href := fmt.Sprintf(po.Href, RecJoin)
            Label := fmt.Sprintf(po.Label, Href, i)
            rs += Label
         } else {
            RecJoin := fmt.Sprintf(po.RecJoinStr, i)
            Href := fmt.Sprintf(po.Href, RecJoin)
            Label := fmt.Sprintf(po.CurrLabel, Href, i)
            rs += Label
         }
      }
   }
   rs += po.getFooter()
   return rs
}

/**
 * po.TotalPages <= po.LinkItemCount
 * 显示完全  12345678910
 */
func (po *PageOptions) type1() string {
   var rs string = ""
   rs += po.getHeader()
   for i := 1; i <= po.TotalPages; i++ {
      if po.CurrentPage != i {
         RecJoin := fmt.Sprintf(po.RecJoinStr, i)
         Href := fmt.Sprintf(po.Href, RecJoin)
         Label := fmt.Sprintf(po.Label, Href, i)
         rs += Label
      } else {
         RecJoin := fmt.Sprintf(po.RecJoinStr, i)
         Href := fmt.Sprintf(po.Href, RecJoin)
         Label := fmt.Sprintf(po.CurrLabel, Href, i)
         rs += Label
      }
   }
   rs += po.getFooter()
   return rs
}

/**
 * 头部
 */
func (po *PageOptions) getHeader() string {
   var rs string = po.HeaderHtml
   if po.EnableFirstLastLink { //当首页,尾页都设定的时候,就显示
      RecJoin := fmt.Sprintf(po.RecJoinStr, 1)
      Href := fmt.Sprintf(po.Href, RecJoin)
      Label := fmt.Sprintf(po.FirstPageLabel, po.judgeDisable(false), Href)
      rs += Label
   }
   if po.EnablePreNexLink {
      var a int = po.CurrentPage - 1
      if po.CurrentPage == 1 {
         a = 1
      }
      // 上一页
      RecJoin := fmt.Sprintf(po.RecJoinStr, a)
      Href := fmt.Sprintf(po.Href, RecJoin)
      Label := fmt.Sprintf(po.PreviousPageLabel, po.judgeDisable(false), Href)
      rs += Label
   }
   return rs
}

/**
 * 尾部
 */
func (po *PageOptions) getFooter() string {
   var rs string = ""
   if po.EnablePreNexLink {
      var a int = po.CurrentPage + 1
      if po.CurrentPage == po.TotalPages {
         a = po.TotalPages
      }
      RecJoin := fmt.Sprintf(po.RecJoinStr, a)
      Href := fmt.Sprintf(po.Href, RecJoin)
      Label := fmt.Sprintf(po.NextPageLabel, po.judgeDisable(true), Href)
      rs += Label
   }
   if po.EnableFirstLastLink { //当首页,尾页都设定的时候,就显示
      RecJoin := fmt.Sprintf(po.RecJoinStr, po.TotalPages)
      Href := fmt.Sprintf(po.Href, RecJoin)
      Label := fmt.Sprintf(po.LastPageLabel, po.judgeDisable(true), Href)
      rs += Label
   }
   rs += po.FooterHtml
   return rs
}

//判断首页尾页  上一页下一页是否能用
func (po *PageOptions) judgeDisable(isFooter bool) string {
   var rs string = ""
   //判断头部
   if !isFooter {
      if po.CurrentPage == 1 {
         rs = po.DisabledAttr
      }
   } else {
      if po.CurrentPage == po.TotalPages {
         rs = po.DisabledAttr
      }
   }
   return rs
}
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本文地址: goland web beego gin 网页分页
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