最近線下除錯銀聯支付時報錯：

javax.net.ssl.SSLPeerUnverifiedException: peer not authenticated
at sun.security.ssl.SSLSessionImpl.getPeerCertificates(SSLSessionImpl.java:431)
at org.apache.http.conn.ssl.AbstractVerifier.verify(AbstractVerifier.java:128)
at org.apache.http.conn.ssl.SSLSocketFactory.connectSocket(SSLSocketFactory.java:572)
at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:180)
at org.apache.http.impl.conn.ManagedClientConnectionImpl.open(ManagedClientConnectionImpl.java:294)
at org.apache.http.impl.client.DefaultRequestDirector.tryConnect(DefaultRequestDirector.java:640)
at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:479)
at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:906)
at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:805)
at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:784)
 

測試環境一直報這個錯誤，本地除錯和生產環境沒有問題。

然後就開始搜尋 javax.net.ssl.SSLPeerUnverifiedException: peer not authenticated ，網上也有很多解決方案，基本都是與https證書、協議版本有關，嘗試了各種方法：

1、忽略證書校驗、域名校驗

2、將銀聯https證書匯入到JDK中

3、列印ssl debug資訊

      System.setProperty("javax.net.debug", "ssl"); 

debug資訊如下：

resin-port-8080-30, handling exception: java.net.SocketException: Connection reset
%% Invalidated:  [Session-4, TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256]
resin-port-8080-30, SEND TLSv1.2 ALERT:  fatal, description = unexpected_message
resin-port-8080-30, WRITE: TLSv1.2 Alert, length = 2
resin-port-8080-30, Exception sending alert: java.net.SocketException: 斷開的管道
resin-port-8080-30, called closeSocket()
resin-port-8080-30, IOException in getSession():  java.net.SocketException: Connection reset
resin-port-8080-30, called close()
resin-port-8080-30, called closeInternal(true)
resin-port-8080-30, called close()
resin-port-8080-30, called closeInternal(true)
 

然後搜尋debug中的各種資訊，尋找解決方法，依然沒有解決。

最終在一天晚上找到問題了，測試環境 禁止外網訪問了！！！

允許銀聯支付域名訪問外網，問題解決了。