报错描述：java.security.InvalidKeyException: Illegal key size 原因分析：JRE中自带的“local_policy.jar ”和“US_export_policy.jar”是支持128位密钥的加密算法，而当我们要使用256位密钥算法的时候，已经超出它的范围，无法支持
解决方案：1、## https://blog.csdn.net/dling8/article/details/84061948 2、升级jdk，比如 java version "1.8.0_74" 升级到 java version "1.8.0_261"
参考链接：https://stackoverflow.com/questions/6481627/java-security-illegal-key-size-or-default-parameters
摘要说明：Make sure you use the latest version of JDK/JRE. In my case, I had put JCE into JRE folder, but it didn't help. It happened because I was running my project from the IDE directly (using JDK). Then I updated my JDK and JRE to the latest version (1.8.0_211) and the problem had gone.
