爬虫报错java.net.MalformedURLException: unknown protocol: data-优快云博客

本文链接：https://blog.youkuaiyun.com/xiaoqiaoliushuiCC/article/details/106451145

本文介绍了一种常见的爬虫错误，即java.net.MalformedURLException，并提供了详细的错误堆栈跟踪。错误主要发生在使用Jsoup下载图片时，由于URL协议问题导致。解决方案是确保爬虫的URL地址正确，例如将data协议或无协议的链接更改为http或https开头的链接。

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爬虫报错

java.net.MalformedURLException: unknown protocol: data
	at java.net.URL.<init>(URL.java:596)
	at java.net.URL.<init>(URL.java:486)
	at java.net.URL.<init>(URL.java:435)
	at com.Jsoup.JsoupDemo.downloadPicture(JsoupDemo.java:48)
	at com.Jsoup.JsoupDemo.main(JsoupDemo.java:26)
java.net.MalformedURLException: unknown protocol: data
	at java.net.URL.<init>(URL.java:596)
	at java.net.URL.<init>(URL.java:486)
	at java.net.URL.<init>(URL.java:435)
	at com.Jsoup.JsoupDemo.downloadPicture(JsoupDemo.java:48)
	at com.Jsoup.JsoupDemo.main(JsoupDemo.java:26)
java.net.MalformedURLException: unknown protocol: data
	at java.net.URL.<init>(URL.java:596)
	at java.net.URL.<init>(URL.java:486)
	at java.net.URL.<init>(URL.java:435)
	at com.Jsoup.JsoupDemo.downloadPicture(JsoupDemo.java:48)
	at com.Jsoup.JsoupDemo.main(JsoupDemo.java:26)
java.net.MalformedURLException: no protocol: //img2.bdstatic.com/static/common/widget/shitu/variation/homepage/images/mark_ec9145e.png
	at java.net.URL.<init>(URL.java:589)
	at java.net.URL.<init>(URL.java:486)
	at java.net.URL.<init>(URL.java:435)
	at com.Jsoup.JsoupDemo.downloadPicture(JsoupDemo.java:48)
	at com.Jsoup.JsoupDemo.main(JsoupDemo.java:26)
java.net.MalformedURLException: no protocol: //img1.bdstatic.com/img/image/shitu/feimg/uploading.gif
	at java.net.URL.<init>(URL.java:589)
	at java.net.URL.<init>(URL.java:486)
	at java.net.URL.<init>(URL.java:435)
	at com.Jsoup.JsoupDemo.downloadPicture(JsoupDemo.java:48)
	at com.Jsoup.JsoupDemo.main(JsoupDemo.java:26)

解决：
爬虫url地址是https开头，换成http开头链接。