**爬取图片**
接着上一个的例子，如果我想获取文章详情页面中内容的第一张图
```
package main
import (
"github.com/PeterYangs/article-spider/fileTypes"
"github.com/PeterYangs/article-spider/form"
"github.com/PeterYangs/article-spider/spider"
)
func main() {
f := form.Form{
Host: "https://www.weixz.com",
Channel: "/zxzx/list_[PAGE].html",
Limit: 5,
PageStart: 1,
ListSelector: "body > div > div.information-main.mt-20px.wd1200.displayFlex > div.information-main-left > div.information-main-list > ul > li",
ListHrefSelector: "div.information-main-list-title > a",
DetailFields: map[string]form.Field{
"title": {Types: fileTypes.SingleField, Selector: "body > div > div.information-main.mt-20px.wd1200.displayFlex > div.information-main-left > div.informationContents > div.informationContentTitle > h1"},
"image": {Types: fileTypes.SingleImage, Selector: "body > div > div.information-main.mt-20px.wd1200.displayFlex > div.information-main-left > div.informationContents > div.informationContentText img:nth-child(1)"},
},
}
spider.Start(f)
}
```
**fileTypes.SingleImage**是获取单个图片的类型，**Selector**为选择器
图片将下载在 **/image路径下**，获取的结果为
<br/>
有时候，我们希望图片加上特定的前缀，比如我想要所有的图片都加上/image,最终结果为/image/9387005ae5ef45a9b147a57f6da81042.jpg,修改代码为
```
package main
import (
"github.com/PeterYangs/article-spider/fileTypes"
"github.com/PeterYangs/article-spider/form"
"github.com/PeterYangs/article-spider/spider"
)
func main() {
f := form.Form{
Host: "https://www.weixz.com",
Channel: "/zxzx/list_[PAGE].html",
Limit: 5,
PageStart: 1,
ListSelector: "body > div > div.information-main.mt-20px.wd1200.displayFlex > div.information-main-left > div.information-main-list > ul > li",
ListHrefSelector: "div.information-main-list-title > a",
DetailFields: map[string]form.Field{
"title": {Types: fileTypes.SingleField, Selector: "body > div > div.information-main.mt-20px.wd1200.displayFlex > div.information-main-left > div.informationContents > div.informationContentTitle > h1"},
"image": {Types: fileTypes.SingleImage, Selector: "body > div > div.information-main.mt-20px.wd1200.displayFlex > div.information-main-left > div.informationContents > div.informationContentText img:nth-child(1)", ImagePrefix: "/image"},
},
}
spider.Start(f)
}
```
ImagePrefix为图片名称前缀
<br/><br/>
现在又有一种情况，如果爬取的图片过多，全部集中在image文件夹下会有点乱，我想根据时间或者日期整理到子文件夹中，修改代码如下
<br/>
根据日期
```
package main
import (
"github.com/PeterYangs/article-spider/fileTypes"
"github.com/PeterYangs/article-spider/form"
"github.com/PeterYangs/article-spider/spider"
)
func main() {
f := form.Form{
Host: "https://www.weixz.com",
Channel: "/zxzx/list_[PAGE].html",
Limit: 5,
PageStart: 1,
ListSelector: "body > div > div.information-main.mt-20px.wd1200.displayFlex > div.information-main-left > div.information-main-list > ul > li",
ListHrefSelector: "div.information-main-list-title > a",
DetailFields: map[string]form.Field{
"title": {Types: fileTypes.SingleField, Selector: "body > div > div.information-main.mt-20px.wd1200.displayFlex > div.information-main-left > div.informationContents > div.informationContentTitle > h1"},
"image": {Types: fileTypes.SingleImage, Selector: "body > div > div.information-main.mt-20px.wd1200.displayFlex > div.information-main-left > div.informationContents > div.informationContentText img:nth-child(1)", ImagePrefix: "/image",ImageDir: "[date:Ymd]"},
},
}
spider.Start(f)
}
```
结果为
<br/>
根据随机数
```
package main
import (
"github.com/PeterYangs/article-spider/fileTypes"
"github.com/PeterYangs/article-spider/form"
"github.com/PeterYangs/article-spider/spider"
)
func main() {
f := form.Form{
Host: "https://www.weixz.com",
Channel: "/zxzx/list_[PAGE].html",
Limit: 5,
PageStart: 1,
ListSelector: "body > div > div.information-main.mt-20px.wd1200.displayFlex > div.information-main-left > div.information-main-list > ul > li",
ListHrefSelector: "div.information-main-list-title > a",
DetailFields: map[string]form.Field{
"title": {Types: fileTypes.SingleField, Selector: "body > div > div.information-main.mt-20px.wd1200.displayFlex > div.information-main-left > div.informationContents > div.informationContentTitle > h1"},
"image": {Types: fileTypes.SingleImage, Selector: "body > div > div.information-main.mt-20px.wd1200.displayFlex > div.information-main-left > div.informationContents > div.informationContentText img:nth-child(1)", ImagePrefix: "/image",ImageDir: "[random:1-100]"},
},
}
spider.Start(f)
}
```
结果为
<br/><br/>
我现在又想将文件夹名称改为标题的名称，如： /image/珍珑对弈，零元购福利《天龙3D》新资料片今日上线！/b260e4e5fc324ea1bec80afefd9c05d8.jpg，修改代码为
```
package main
import (
"github.com/PeterYangs/article-spider/fileTypes"
"github.com/PeterYangs/article-spider/form"
"github.com/PeterYangs/article-spider/spider"
)
func main() {
f := form.Form{
Host: "https://www.weixz.com",
Channel: "/zxzx/list_[PAGE].html",
Limit: 5,
PageStart: 1,
ListSelector: "body > div > div.information-main.mt-20px.wd1200.displayFlex > div.information-main-left > div.information-main-list > ul > li",
ListHrefSelector: "div.information-main-list-title > a",
DetailFields: map[string]form.Field{
"title": {Types: fileTypes.SingleField, Selector: "body > div > div.information-main.mt-20px.wd1200.displayFlex > div.information-main-left > div.informationContents > div.informationContentTitle > h1"},
"image": {Types: fileTypes.SingleImage, Selector: "body > div > div.information-main.mt-20px.wd1200.displayFlex > div.information-main-left > div.informationContents > div.informationContentText img:nth-child(1)", ImagePrefix: "/image",ImageDir: "[singleField:title]"},
},
}
spider.Start(f)
}
```
结果为
**[singleField:title]** 中的title为singleField中的某一个字段
