Java implementation AES encryption, exception Java.security.InvalidKeyException:Illegal key size resolution

Java implements AES encryption and throws an exception as follows:
Java.security.InvalidKeyException:Illegal Key Size

Code reference HTTP://MY.OSCHINA.NET/JACKER/BLOG/86383?FROMERR=X3L5XL1A

Reason:

Illegal key size or default parameters means that the key length is limited,

The Java Runtime environment reads a restricted policy file.

The policy file is located in the ${java_home}/jre/lib/security directory.

This limitation is due to U.S. control over software exports.

Workaround:

To remove this restriction, simply download the Java Cryptography Extension (JCE) Unlimited strength Jurisdiction Policy Files,

Overwrite the corresponding jar file (Local_policy.jar, Us_export_policy.jar) in the above directory.

：
JDK6 http://www.oracle.com/technetwork/java/javase/downloads/jce-6-download-429243.html
JDK7 http://www.oracle.com/technetwork/java/javase/downloads/jce-7-download-432124.html
JDK8 http://www.oracle.com/technetwork/java/javase/downloads/jce8-download-2133166.html

The Readme.txt of the download package has the installation instructions, which is replaced

${jdk_home}/jre/lib/security

${jre_home}/lib/security

The Local_policy.jar and Us_export_policy.jar files in the directory.

Reference Http://stackoverflow.com/questions/6481627/java-security-illegal-key-size-or-default-parameters

Java implementation AES encryption, exception Java.security.InvalidKeyException:Illegal key size resolution