简单的beego分页功能代码
一个简单的beego分页小插件(源代码在最下面):
支持条件查询
支持参数保留
支持自定义css样式
支持表/视图
支持参数自定义 默认为pno
支持定义生成链接的个数
使用方式:
1)action中,引入包,然后如下使用:
/** * 日志列表 */ func (this *LogController) List() { pno, _ := this.GetInt("pno") //获取当前请求页 var tlog []m.Tb_log var conditions string = " order by id desc" //定义日志查询条件,格式为 " and name='zhifeiya' and age=12 " var po pager.PageOptions //定义一个分页对象 po.TableName = "tb_log" //指定分页的表名 po.EnableFirstLastLink = true //是否显示首页尾页 默认false po.EnablePreNexLink = true //是否显示上一页下一页 默认为false po.Conditions = conditions // 传递分页条件 默认全表 po.Currentpage = int(pno) //传递当前页数,默认为1 po.PageSize = 20 //页面大小 默认为20 //返回分页信息, //第一个:为返回的当前页面数据集合,ResultSet类型 //第二个:生成的分页链接 //第三个:返回总记录数 //第四个:返回总页数 rs, pagerhtml, totalItem, _ := pager.GetPagerLinks(&po, this.Ctx) rs.QueryRows(&tlog) //把当前页面的数据序列化进一个切片内 this.Data["list"] = tlog //把当前页面的数据传递到前台 this.Data["pagerhtml"] = pagerhtml this.Data["totalItem"] = totalItem this.Data["PageSize"] = po.PageSize this.TplNames = "cms/log/list.html" }
2)视图代码:
class="default" 是分页样式,可根据实际情况设置
<div class="default"><span>共{{.totalItem}}记录</span> <div style="float:left;">{{.pagerhtml}}</div> </div>
效果图片:
<div class="meneame"><span>共{{.totalItem}}记录</span> <div style="float:left;">{{.pagerhtml}}</div> </div>
效果图片:
分页源代码:
package pager /** * 分页功能 * 支飞亚 * 2014-9-1 */ import ( // "fmt" "github.com/astaxie/beego/context" "github.com/astaxie/beego/orm" html "html/template" con "strconv" "strings" "time" ) type PageOptions struct { TableName string //表名 -----------------[必填] Conditions string //条件 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.在控制器中使用方式:cp, _ := this.GetInt("pno") po.Currentpage = int(cp) PageSize int //页面大小,默认20 LinkItemCount int //生成A标签的个数 默认10个 Href string //A标签的链接地址 ---------[不需要设置] ParamName string //参数名称 默认是pno FirstPageText string //首页文字 默认"首页" LastPageText string //尾页文字 默认"尾页" PrePageText string //上一页文字 默认"上一页" NextPageText string //下一页文字 默认"下一页" 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 } /** * 分页函数，适用任何表 * 返回 总记录条数,总页数,以及当前请求的数据RawSeter,调用中需要"rs.QueryRows(&tblog)"就行了 --tblog是一个Tb_log对象 * 参数：表名，当前页数，页面大小，条件（查询条件,格式为 " and name='zhifeiya' and age=12 "） */ func GetPagesInfo(tableName string, currentpage int, pagesize int, conditions string) (int, int, orm.RawSeter) { if currentpage <= 1 { currentpage = 1 } if pagesize == 0 { pagesize = 20 } var rs orm.RawSeter o := orm.NewOrm() var totalItem, totalpages int = 0, 0 //总条数,总页数 o.Raw("SELECT count(*) FROM " + tableName + " where 1>0 " + conditions).QueryRow(&totalItem) //获取总条数 if totalItem <= pagesize { totalpages = 1 } else if totalItem > pagesize { temp := totalItem / pagesize if (totalItem % pagesize) != 0 { temp = temp + 1 } totalpages = temp } rs = o.Raw("select * from " + tableName + " where id >0 " + conditions + " LIMIT " + con.Itoa((currentpage-1)*pagesize) + "," + con.Itoa(pagesize)) return totalItem, totalpages, rs } /** * 返回总记录条数,总页数,当前页面数据,分页html * 根据分页选项,生成分页连接 下面是一个实例: func (this *MainController) Test() { var po util.PageOptions po.EnablePreNexLink = true po.EnableFirstLastLink = true po.LinkItemCount = 7 po.TableName = "help_topic" cp, _ := this.GetInt("pno") po.Currentpage = int(cp) _,_,_ pager := util.GetPagerLinks(&po, this.Ctx) this.Data["Email"] = html.HTML(pager) this.TplNames = "test.html" } */ func GetPagerLinks(po *PageOptions, ctx *context.Context) (int, int, orm.RawSeter, html.HTML) { var str string = "" totalItem, totalpages, rs := GetPagesInfo(po.TableName, po.Currentpage, po.PageSize, po.Conditions) po = setDefault(po, totalpages) DealUri(po, ctx) if totalpages <= po.LinkItemCount { str = fun1(po, totalpages) //显示完全 12345678910 } else if totalpages > po.LinkItemCount { if po.Currentpage < po.LinkItemCount { str = fun2(po, totalpages) //123456789...200 } else { if po.Currentpage+po.LinkItemCount < totalpages { str = fun3(po, totalpages) } else { str = fun4(po, totalpages) } } } return totalItem, totalpages, rs, html.HTML(str) } /** * 处理url,目的是保存参数 */ func DealUri(po *PageOptions, ctx *context.Context) { uri := ctx.Request.RequestURI var rs string if strings.Contains(uri, "?") { arr := strings.Split(uri, "?") rs = arr[0] + "?" + po.ParamName + "time=" + con.Itoa(time.Now().Second()) arr2 := strings.Split(arr[1], "&") for _, v := range arr2 { if !strings.Contains(v, po.ParamName) { rs += "&" + v } } } else { rs = uri + "?" + po.ParamName + "time=" + con.Itoa(time.Now().Second()) } po.Href = rs } /** * 1...197 198 199 200 */ func fun4(po *PageOptions, totalpages int) string { var rs string = "" rs += getHeader(po, totalpages) rs += "<a href='" + po.Href + "&" + po.ParamName + "=" + con.Itoa(1) + "'>" + con.Itoa(1) + "</a>" rs += "<a href=''>...</a>" for i := totalpages - po.LinkItemCount; i <= totalpages; i++ { if po.Currentpage != i { rs += "<a href='" + po.Href + "&" + po.ParamName + "=" + con.Itoa(i) + "'>" + con.Itoa(i) + "</a>" } else { rs += "<span class=\"current\">" + con.Itoa(i) + "</span>" } } rs += getFooter(po, totalpages) return rs } /** * 1...6 7 8 9 10 11 12 13 14 15... 200 */ func fun3(po *PageOptions, totalpages int) string { var rs string = "" rs += getHeader(po, totalpages) rs += "<a href='" + po.Href + "&" + po.ParamName + "=" + con.Itoa(1) + "'>" + con.Itoa(1) + "</a>" rs += "<a href=''>...</a>" for i := po.Currentpage - po.LinkItemCount/2 + 1; i <= po.Currentpage+po.LinkItemCount/2-1; i++ { if po.Currentpage != i { rs += "<a href='" + po.Href + "&" + po.ParamName + "=" + con.Itoa(i) + "'>" + con.Itoa(i) + "</a>" } else { rs += "<span class=\"current\">" + con.Itoa(i) + "</span>" } } rs += "<a href=''>...</a>" rs += "<a href='" + po.Href + "&" + po.ParamName + "=" + con.Itoa(totalpages) + "'>" + con.Itoa(totalpages) + "</a>" rs += getFooter(po, totalpages) return rs } /** * totalpages > po.LinkItemCount po.Currentpage < po.LinkItemCount * 123456789...200 */ func fun2(po *PageOptions, totalpages int) string { var rs string = "" rs += getHeader(po, totalpages) for i := 1; i <= po.LinkItemCount+1; i++ { if i == po.LinkItemCount { rs += "<a href=\"" + po.Href + "&" + po.ParamName + "=" + con.Itoa(i) + "\">...</a>" } else if i == po.LinkItemCount+1 { rs += "<a href=\"" + po.Href + "&" + po.ParamName + "=" + con.Itoa(totalpages) + "\">" + con.Itoa(totalpages) + "</a>" } else { if po.Currentpage != i { rs += "<a href='" + po.Href + "&" + po.ParamName + "=" + con.Itoa(i) + "'>" + con.Itoa(i) + "</a>" } else { rs += "<span class=\"current\">" + con.Itoa(i) + "</span>" } } } rs += getFooter(po, totalpages) return rs } /** * totalpages <= po.LinkItemCount * 显示完全 12345678910 */ func fun1(po *PageOptions, totalpages int) string { var rs string = "" rs += getHeader(po, totalpages) for i := 1; i <= totalpages; i++ { if po.Currentpage != i { rs += "<a href='" + po.Href + "&" + po.ParamName + "=" + con.Itoa(i) + "'>" + con.Itoa(i) + "</a>" } else { rs += "<span class=\"current\">" + con.Itoa(i) + "</span>" } } rs += getFooter(po, totalpages) return rs } /** * 头部 */ func getHeader(po *PageOptions, totalpages int) string { var rs string = "<div>" if po.EnableFirstLastLink { //当首页,尾页都设定的时候,就显示 rs += "<a " + judgeDisable(po, totalpages, 0) + " href='" + po.Href + "&" + po.ParamName + "=" + con.Itoa(1) + "'>" + po.FirstPageText + "</a>" } if po.EnablePreNexLink { // disabled=\"disabled\" var a int = po.Currentpage - 1 if po.Currentpage == 1 { a = 1 } rs += "<a " + judgeDisable(po, totalpages, 0) + " href='" + po.Href + "&" + po.ParamName + "=" + con.Itoa(a) + "'>" + po.PrePageText + "</a>" } return rs } /** * 尾部 */ func getFooter(po *PageOptions, totalpages int) string { var rs string = "" if po.EnablePreNexLink { var a int = po.Currentpage + 1 if po.Currentpage == totalpages { a = totalpages } rs += "<a " + judgeDisable(po, totalpages, 1) + " href='" + po.Href + "&" + po.ParamName + "=" + con.Itoa(a) + "'>" + po.NextPageText + "</a>" } if po.EnableFirstLastLink { //当首页,尾页都设定的时候,就显示 rs += "<a " + judgeDisable(po, totalpages, 1) + " href='" + po.Href + "&" + po.ParamName + "=" + con.Itoa(totalpages) + "'>" + po.LastPageText + "</a>" } rs += "</div>" return rs } /** * 设置默认值 */ func setDefault(po *PageOptions, totalpages int) *PageOptions { if len(po.FirstPageText) <= 0 { po.FirstPageText = "首页" } if len(po.LastPageText) <= 0 { po.LastPageText = "尾页" } if len(po.PrePageText) <= 0 { po.PrePageText = "上一页" } if len(po.NextPageText) <= 0 { po.NextPageText = "下一页" } if po.Currentpage >= totalpages { po.Currentpage = 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 = "pno" } return po } /** *判断首页尾页 上一页下一页是否能用 */ func judgeDisable(po *PageOptions, totalpages int, h_f int) string { var rs string = "" //判断头部 if h_f == 0 { if po.Currentpage == 1 { rs = "disabled=\"disabled\" style='pointer-events:none;'" } } else { if po.Currentpage == totalpages { rs = "disabled=\"disabled\" style='pointer-events:none;'" } } return rs }
---支飞亚
