package main
import (
"fmt"
"regexp"
)
var reg *regexp.Regexp
var pattern string
var source string
func regexpMatch() {
// xy 匹配x y
// x|y 匹配x或者y 优先x
// source = "asdfdsxxxyyfergsfasfxyfa"
// pattern = `x|y|a`
//x* 匹配零个或者多个x,优先匹配多个
//x+ 匹配一个或者多个x，优先匹配多个
//x? 匹配零个或者一个x，优先匹配一个
//source = "xxxxewexxxasdfdsxxxyyfergsfasfxyfa"
//pattern = `x*`
// x{n,m} 匹配n个到m个x，优先匹配m个
// x{n,} 匹配n个到多个x，优先匹配更多
// x{n} 或者x{n}? 只匹配n个x
//source = "xxxxxxxewexxxasdfdsxxxyyfergsfasfxyfa"
//pattern = `x{4,}`
// x{n,m}? 匹配n个到m个x，优先匹配n个
// x{n,}? 匹配n个到多个x，优先匹配n个
// x*? 匹配零个或者多个x，优先匹配0个
// x+? 匹配一个或者多个x，优先匹配1个
// x?? 匹配零个或者一个x，优先匹配0个
//source = "xxxxxxxewexxxasdfdsxxxyyfergsfasfxyfa"
//pattern = `x??`
//[\d] 或者[^\D] 匹配数字
//[^\d]或者 [\D] 匹配非数字
//source = "xx435ff5237yy6346fergsfasfxyfa"
//pattern = `[\d]{3,}` //匹配3个或者更多个数字
//source = "xx435ffGUTEYgjk52RYPHFY37yy6346ferg6987sfasfxyfa"
//pattern = `[a-z]{3,}` //三个或者多个小写字母
//source = "xx435ffGUTEYgjk52RYPHFY37yy6346ferg6987sfasfxyfa"
//pattern = `[[:alpha:]]{5,}` //5个或者多个字母，相当于A-Za-z
//source = "xx435,./$%(*(_&jgshgs发个^$%ffG返回福hjh放假啊啥UTEYgjk52RYPHFY37yy6346ferg6987sfasfxyfa"
//pattern = `[\p{Han}]+` //匹配连续的汉字
//source = "13244820821HG74892109977HJA15200806084S11233240697hdgsfhah假发发货"
//pattern = `1[3|5|7|8|][\d]{9}` //匹配电话号码
//source = "132@12.comGKGk15@163.cn200806084S11233240697hdgsfhah假发发货"
//pattern = `\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*` //匹配电子邮箱
//匹配用户名或者密码 `^[a-zA-Z0-9_-]{4,16}$` 字母或者数字开头，区分大小写，最短4位最长16位
//匹配IP地址1 `^$(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$`
//匹配IP地址2
//pattern = `((2[0-4]\d|25[0-5]|[01]?\d\d?)\.){3}(2[0-4]\d|25[0-5]|[01]?\d\d?)`
//匹配日期 年-月-日 `(\d{4}|\d{2})-((1[0-2])|(0?[1-9]))-(([12][0-9])|(3[01])|(0?[1-9]))`
//匹配日期 月-日-年 `((1[0-2])|(0?[1-9]))/(([12][0-9])|(3[01])|(0?[1-9]))/(\d{4}|\d{2})`
//匹配时间 小时：分钟 24小时制 ` ((1|0?)[0-9]|2[0-3]):([0-5][0-9]) `
//匹配邮编 `[1-9][\d]5`
//匹配URL `[a-zA-z]+://[^\s]*`
reg = regexp.MustCompile(pattern)
fmt.Printf("%s", reg.FindAllString(source, -1))
}
func main() {
regexpMatch()
}
