错误:com.sun.crypto.provider.AESCipher $ General无法转换为javax.crypto.CipherSpi [英] error :com.sun.crypto.provider.AESCipher$General cannot be cast to javax.crypto.CipherSpi

问题描述

你好，我在Liferay dxp项目中使用Paytm校验和依赖项

Hello I am using Paytm checksum dependency in my Liferay dxp project

但是我遇到了 error:com.sun.crypto.provider.AESCipher $ General无法转换为javax.crypto.CipherSpi

Gradle属性:

dependencies {compile fileTree(dir: 'libs/', include: '*.jar') compileInclude name: 'paytmchecksum-1.1'}

PaytmUtil包含以下代码.

PaytmUtil contains the bellow code.

private static String getCheckSumPayTm(TreeMap<String, String> reqMap){

    CheckSumServiceHelper checkSumServiceHelper =  CheckSumServiceHelper.getCheckSumServiceHelper();

    String checksum = null;
    try {
        checksum =  checkSumServiceHelper.genrateCheckSum("paytmKey", reqMap.toString());
        log.info("PAYTM CHECKSUM ================== "  + checksum);
    } catch (Exception e) {
        e.printStackTrace();
        log.error("error :" + e.getMessage());
    }
    return checksum;
}

推荐答案

假设根据静态类层次结构，您希望 com.sun.crypto.provider.AESCipher $ General 为一个有效的 javax.crypto.CipherSpi 子类，您正在处理类路径上的重复类-但是会得到它们.

Assuming that according to the static class hierarchy, you'd expect com.sun.crypto.provider.AESCipher$General to be a valid subclass of javax.crypto.CipherSpi, you're dealing with duplicate classes on the classpath - however you get them.

compileInclude是一个不错的选择，因为它可以在类路径上包含比您想要的更多的代码，即，复制类，否则这些类将通过常规的类加载机制来提供.

compileInclude is a good candidate for including more code than you want to on the classpath, i.e. duplicating classes that otherwise would come through the regular classloading mechanism.

不幸的是，此错误消息没有告诉您的是装入每个提到的类的类加载器.而且很可能是超类重复了.您通常可以将错误消息读取为

What this error message unfortunately doesn't tell you is the classloader that loads each mentioned class. And most likely it's the superclass that's duplicate. You typically can read the error message as

无法将

com.sun.crypto.provider.AESCipher $ General 强制转换为从类加载器A加载的 javax.crypto.CipherSpi ，但是可以从类加载器B强制转换为 javax.crypto.CipherSpi .

com.sun.crypto.provider.AESCipher$General cannot be cast to javax.crypto.CipherSpi loaded from classloader A - however, it could be cast to javax.crypto.CipherSpi from classloader B.

不幸的是，在这种情况下，您必须自己找到类加载器A和B，但是如果您在类路径上的任何位置查找 CipherSpi 的位置，则应该能够找到它..通常已经提供了它，您不应该自己带它.

Unfortunately, in this case, you'll have to find classloaders A and B for yourself, but if you look for the location of CipherSpi anywhere on your classpath, you should be able to find it. It's typically already provided and you shouldn't bring it yourself.

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