go分页
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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
}
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