Go语言小爬虫－－第一步

    解析新浪手机新闻网页，获取5条新的新闻的url存入到数据库

package linksql

import (

"database/sql"

"log"

_"github.com/go-sql-driver/mysql"

)

func Open_url_table() *sql.DB{

db,err:=sql.Open("mysql","root:root@/mysql")

Checkerror(err)

return db

}

func Insertlink(id int,src string,url string){

db:=Open_url_table()

stmt,err1:=db.Prepare("insert into url_table(id,src,url) values(?,?,?)")

if err1!=nil{

log.Fatalln("prepare error",err1)

}

_,err2:=stmt.Exec(id,src,url)

if err2!=nil{

log.Fatalln("Exec error")

}

}

func Checkerror(err error){   //差错

if err!=nil{

log.Fatal(err)

}

}

package search_sina

import (

"net/http"

"log"

"gopkg.in/xmlpath.v2"

"test/linksql"

)

func Get_url(url string){ //找新ＵＲＬ

resp,err:=http.Get(url)

Checkerror(err)

root,err1:=xmlpath.ParseHTML(resp.Body)

Checkerror(err1)

path:=xmlpath.MustCompile(`//dl[@class="f_card"]/../@href`)

iter:=path.Iter(root)

i:=1

for iter.Next() && i<6{

//fmt.Println(iter.Node())

linksql.Insertlink(i,"sina",iter.Node().String())

i++

}

}

func Checkerror(err error){

if err!=nil{

log.Fatalln(err)

}

}

+----+------+-------------------------------------------------------------------------------+| id | src  | url                                                                           |+----+------+-------------------------------------------------------------------------------+|  1 | sina | http://tech.sina.cn/tech_zt/meitu_ipo?vt=4&pos=18                             ||  2 | sina | http://tech.sina.cn/i/gj/2016-12-15/detail-ifxytqav9330894.d.html?vt=4&pos=18 ||  3 | sina | http://zhuanlan.sina.cn/article?vt=4&pos=18&id=57660&ch=tech                  ||  4 | sina | http://tech.sina.cn/i/gj/2016-12-15/detail-ifxytqax6095612.d.html?vt=4&pos=18 ||  5 | sina | http://tech.sina.cn/i/gj/2016-12-15/detail-ifxytqav9326149.d.html?vt=4&pos=18 |+----+------+-------------------------------------------------------------------------------+