参考链接：[url]http://www.cnblogs.com/gdayq/p/5919252.html[/url]
报错1：
java.security.InvalidKeyException: Illegal key size报错2：
java.lang.SecurityException: The jurisdiction policy files are not signed by a trusted signer!
at javax.crypto.JarVerifier.verifyPolicySigned(JarVerifier.java:289)
at javax.crypto.JceSecurity.loadPolicies(JceSecurity.java:318)
at javax.crypto.JceSecurity.setupJurisdictionPolicies(JceSecurity.java:263)
at javax.crypto.JceSecurity.access$000(JceSecurity.java:48)
at javax.crypto.JceSecurity$1.run(JceSecurity.java:78)
at java.security.AccessController.doPrivileged(Native Method)
at javax.crypto.JceSecurity.<clinit>(JceSecurity.java:76)
at javax.crypto.Cipher.getInstance(Cipher.java:499)
java.lang.NoClassDefFoundError: Could not initialize class javax.crypto.JceSecurity
at javax.crypto.Cipher.getInstance(Cipher.java:499)
at com.jd.common.web.DotnetAuthenticationUtil.encrypt(DotnetAuthenticationUtil.java:113)
是jdk不兼容的问题，我本地以及同事的测试环境都是jdk1.7，而我搭建的环境用的是jdk1.8
解决方案如下：
处理办法: 在官方网站下载JCE无限制权限策略文件
JDK7的下载地址: [url]http://www.oracle.com/technetwork/java/javase/downloads/jce-7-download-432124.html[/url]
JDK8的下载地址:
[url]http://www.oracle.com/technetwork/java/javase/downloads/jce8-download-2133166.html [/url]
下载后解压，可以看到local_policy.jar和US_export_policy.jar以及readme.txt
如果安装了JRE，将两个jar文件放到%JRE_HOME%\lib\security目录下覆盖原来的文件
如果安装了JDK，还要将两个jar文件也放到%JDK_HOME%\jre\lib\security目录下覆盖原来文件
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