go语言之正则表达式

//regexppackage mainimport ( "fmt" "regexp")func main() { //需要匹配的模式 //reg := regexp.MustCompile("\\w+") 正则表达式中的\需要转义 reg := regexp.MustCompile(`^z.*1$`) //返回匹配到的结果 result := reg.FindAllString("zhangsan1", -1) fmt.Printf("%v\n", result) //演示一个匹配不到的例子 reg1 := regexp.MustCompile(`^z(.*)1$`) result1 := reg1.FindAllString("zhangsand", -1) fmt.Printf("%v\n", result1) reg2 := regexp.MustCompile(`^z(.{1})(.{1})(.*)1$`) result2 := reg2.FindAllString("zhangsan1", -1) fmt.Printf("%v\n", result2)}

// simple_crawlerpackage mainimport ( "fmt" "io/ioutil" "net/http" "regexp")func main() { url := "https://movie.douban.com/subject/24751763/" resp, err := http.Get(url) if err != nil { panic(err) } defer resp.Body.Close() sHtml, _ := ioutil.ReadAll(resp.Body) reg := regexp.MustCompile(`<span\s*property="v:itemreviewed">(.*)</span>`) result := reg.FindAllStringSubmatch(string(sHtml), -1) fmt.Println(result[0][1]) reg1 := regexp.MustCompile(`<strong\s*class="ll\s*rating_num"\s*property="v:average">(.*)</strong>`) result1 := reg1.FindAllStringSubmatch(string(sHtml), -1) fmt.Println(result1[0][1])}