为什么我得到包javax.crypto不存在 [英] Why am I getting package javax.crypto does not exist

问题描述

当我使用javax.crypto.Mac编译一个类时，我收到此错误消息？

When I compile a class using javax.crypto.Mac I get this error message?

包javax.crypto不存在

package javax.crypto does not exist

我可以通过在编译类路径中包含jre / lib / jce.jar来修复它。

I can fix it by including jre/lib/jce.jar in my compile classpath.

为什么jce.jar不在默认的jdk类路径上？ jre / lib / rt.jar在classpath上，包含其他javax包，但是jce看起来很特别？

Why is jce.jar not on the default jdk classpath? jre/lib/rt.jar is on the classpath, and includes other javax packages, but jce seems special?

推荐答案

好吧，这对我来说是个错误。我用来编译代码的Ant文件在 javac 任务上有这个属性：

OK, this was a mistake on my part. The Ant file I was using to compile the code had this attribute on the javac task:

bootclasspath="${java.home}/lib/rt.jar" 

卫生署。您可以像这样添加JCE jar：

Doh. You can add the JCE jar like this:

bootclasspath="${java.home}/lib/rt.jar:${java.home}/lib/jce.jar"

这篇关于为什么我得到包javax.crypto不存在的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！