com.sun.net.ssl.internal.www.protocol.https.HttpsURLConnectionOldImpl cannot be cast to javax.net.ss
2018-07-28 22:38
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导入sun.net.www.protocol.https.Handler，
import sun.net.www.protocol.https.Handler；
如果报错没有这个，说明你的JDK版本低了，换高版本JDK。
把url=new URL(url);
改为url = new URL(null, url, new sun.net.www.protocol.https.Handler());
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