- which java ==> /user/bin/java
- ls -lrt /user/bin/java ==> /etc/alternatives/java
- ls -lrt /etc/alternatives/java ==> /usr/lib/jvm/java-1.8/jre/bin/java
- 打开 /usr/lib/jvm/java-1.8/jre/security/java.security 文件
- 在文件最后添加 jdk.tls.disabledAlgorithms = TLS1.0,TLS1.1,SSLv2,SSLv3



