我每次访问https站点时,需要等待好久然后才有点反映,结果就是出现了上面图中的页面。我总不能每访问一下站点就添加一个信任吧而且有时还会有如下异常,是怎么回事呢????javax.net.ssl.SSLHandshakeException: Received fatal alert: unknown_ca at com.sun.net.ssl.internal.ssl.Alerts.getSSLException(Alerts.java:174) at com.sun.net.ssl.internal.ssl.Alerts.getSSLException(Alerts.java:136) at com.sun.net.ssl.internal.ssl.SSLSocketImpl.recvAlert(SSLSocketImpl.java:1774) at com.sun.net.ssl.internal.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:954) at com.sun.net.ssl.internal.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1138) at com.sun.net.ssl.internal.ssl.SSLSocketImpl.readDataRecord(SSLSocketImpl.java:753) at com.sun.net.ssl.internal.ssl.AppInputStream.read(AppInputStream.java:75) at com.fainfy.nps4j.https.StreamThread.run(StreamThread.java:58) at java.lang.Thread.run(Thread.java:662) javax.net.ssl.SSLHandshakeException: Received fatal alert: unknown_ca at com.sun.net.ssl.internal.ssl.Alerts.getSSLException(Alerts.java:174) at com.sun.net.ssl.internal.ssl.Alerts.getSSLException(Alerts.java:136) at com.sun.net.ssl.internal.ssl.SSLSocketImpl.recvAlert(SSLSocketImpl.java:1774) at com.sun.net.ssl.internal.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:954) at com.sun.net.ssl.internal.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1138) at com.sun.net.ssl.internal.ssl.SSLSocketImpl.readDataRecord(SSLSocketImpl.java:753) at com.sun.net.ssl.internal.ssl.AppInputStream.read(AppInputStream.java:75) at com.fainfy.nps4j.https.StreamThread.run(StreamThread.java:58) at java.lang.Thread.run(Thread.java:662)
at com.sun.net.ssl.internal.ssl.Alerts.getSSLException(Alerts.java:174)
at com.sun.net.ssl.internal.ssl.Alerts.getSSLException(Alerts.java:136)
at com.sun.net.ssl.internal.ssl.SSLSocketImpl.recvAlert(SSLSocketImpl.java:1774)
at com.sun.net.ssl.internal.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:954)
at com.sun.net.ssl.internal.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1138)
at com.sun.net.ssl.internal.ssl.SSLSocketImpl.readDataRecord(SSLSocketImpl.java:753)
at com.sun.net.ssl.internal.ssl.AppInputStream.read(AppInputStream.java:75)
at com.fainfy.nps4j.https.StreamThread.run(StreamThread.java:58)
at java.lang.Thread.run(Thread.java:662)
javax.net.ssl.SSLHandshakeException: Received fatal alert: unknown_ca
at com.sun.net.ssl.internal.ssl.Alerts.getSSLException(Alerts.java:174)
at com.sun.net.ssl.internal.ssl.Alerts.getSSLException(Alerts.java:136)
at com.sun.net.ssl.internal.ssl.SSLSocketImpl.recvAlert(SSLSocketImpl.java:1774)
at com.sun.net.ssl.internal.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:954)
at com.sun.net.ssl.internal.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1138)
at com.sun.net.ssl.internal.ssl.SSLSocketImpl.readDataRecord(SSLSocketImpl.java:753)
at com.sun.net.ssl.internal.ssl.AppInputStream.read(AppInputStream.java:75)
at com.fainfy.nps4j.https.StreamThread.run(StreamThread.java:58)
at java.lang.Thread.run(Thread.java:662)