java ssl 网络连接报：java.net.PlainSocketImpl.connect(PlainSocketImpl.java:227)

java.net.PlainSocketImpl.connect(PlainSocketImpl.java:227)

java.net.SocksSocketImpl.connect(SocksSocketImpl.java:377)

java.net.Socket.connect(Socket.java:539)

java.net.Socket.connect(Socket.java:488)

sun.net.NetworkClient.doConnect(NetworkClient.java:175)

sun.net.www.http.HttpClient.openServer(HttpClient.java:407)

sun.net.www.http.HttpClient.openServer(HttpClient.java:542)

com.ibm.net.ssl.www2.protocol.https.c.<init>(c.java:161)

.ibm.net.ssl.www2.protocol.https.c.a(c.java:73)

.ibm.net.ssl.www2.protocol.https.d.getNewHttpClient(d.java:2)

sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:921)

com.ibm.net.ssl.www2.protocol.https.d.connect(d.java:46)

sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1182)

 com.ibm.net.ssl.www2.protocol.https.b.getInputStream(b.java:84) dna.common.SslConnection.connect(SslConnection.java:46)

原因：连接URL失败

解决方案：在访问URL的机器上telnet 一下要访问地址，看是否telnet通，telnet不到就要开放防火墙，运行访问。

如：telnet www.baidu.com 443

如果被防火墙拦截：则报“Temporary failure in name resolution”