javax.net.ssl.SSLHandshakeException: No appropriate protocol報錯解決

一、問題描述

用java開發了一個簡單的發送郵件的程序，本地運行正常，但是上傳到服務器就出現報錯

	javax.net.ssl.SSLHandshakeException: No appropriate protocol (protocol is disabled or cipher suites are inappropriate)
	at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1972)
	at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:642)
	at javax.mail.Service.connect(Service.java:317)
	at javax.mail.Service.connect(Service.java:176)
	at javax.mail.Service.connect(Service.java:125)
	at javax.mail.Transport.send0(Transport.java:194)
	at javax.mail.Transport.send(Transport.java:124)

二、問題解決

1、找到jdk目錄/jre/lib/security/java.security，去掉jdk.tls.disabledAlgorithm中的SSLv3、TLSv1、TLSv1.1，參考https://blog.csdn.net/Wing_kin666/article/details/116449722

2、但是上面方法並沒有解決問題，還需要執行以下命令，才最終解決報錯，參考https://stackoverflow.com/questions/38205947/sslhandshakeexception-no-appropriate-protocol#

update-crypto-policies --set LEGACY