本文主要向大家介绍了JAVA语言之关于webmagic爬取Https网站报错的解决办法，通过具体的内容向大家展示，希望对大家学习JAVA语言有所帮助。

目前webmagic最新版是0.7.3版本，在爬取只支持TLS1.2的https站点会报错

javax.net.ssl.SSLException: Received fatal alert: protocol_version

    at sun.security.ssl.Alerts.getSSLException(Alerts.java:208)

    at sun.security.ssl.Alerts.getSSLException(Alerts.java:154)

    at sun.security.ssl.SSLSocketImpl.recvAlert(SSLSocketImpl.java:2023)

    at sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:1125)

    at sun.security.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1375)

    at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1403)

    at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1387)

    at org.apache.http.conn.ssl.SSLConnectionSocketFactory.createLayeredSocket(SSLConnectionSocketFactory.java:394)

    at org.apache.http.conn.ssl.SSLConnectionSocketFactory.connectSocket(SSLConnectionSocketFactory.java:353)

    at org.apache.http.impl.conn.DefaultHttpClientConnectionOperator.connect(DefaultHttpClientConnectionOperator.java:141)

    at org.apache.http.impl.conn.PoolingHttpClientConnectionManager.connect(PoolingHttpClientConnectionManager.java:353)

    at org.apache.http.impl.execchain.MainClientExec.establishRoute(MainClientExec.java:380)

    at org.apache.http.impl.execchain.MainClientExec.execute(MainClientExec.java:236)

    at org.apache.http.impl.execchain.ProtocolExec.execute(ProtocolExec.java:184)

    at org.apache.http.impl.execchain.RetryExec.execute(RetryExec.java:88)

    at org.apache.http.impl.execchain.RedirectExec.execute(RedirectExec.java:110)

    at org.apache.http.impl.client.InternalHttpClient.doExecute(InternalHttpClient.java:184)

    at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:82)

    at us.codecraft.webmagic.downloader.HttpClientDownloader.download(HttpClientDownloader.java:85)

目前作者说会在0.7.4版本发布修复错误，目前的解决办法是：

临时适配方式，修改HttpClientGenerator中的buildSSLConnectionSocketFactory方法，

return new SSLConnectionSocketFactory(createIgnoreVerifySSL(), new String[]{"SSLv3", "TLSv1", "TLSv1.1", "TLSv1.2"},

                    null,

                    new DefaultHostnameVerifier())

重写自己实现的HttpClientDownloader，并设置到Spider中。

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