抛出java.lang.ClassNotFoundException：org.apache.commons codec.binary.Base64 [英] java.lang.ClassNotFoundException: org.apache.commons.codec.binary.Base64

问题描述

在这里，我传递三个参数到这个标志方法。
在此行

  

签名=新的String（Base64.en codeBase64（mac.doFinal（data.getBytes（UTF_8_Encoding））））;

我收到错误：

  

重度：对servlet的Servlet.service（）
  [com.asp.amz.amzServlet]在上下文中
  与路径[/亚马逊]抛出异常
  [Servlet的执行引发了异常]
  与根源
  抛出java.lang.ClassNotFoundException：
  org.apache.commons。codec.binary.Base64

 字符串键= Z / 0qfiE + ScjxHy2gSwmHqP0rZ6fT9zhVgsNt;
字符串是SignatureMethod = HmacSHA256;
字符串数据= sandbox.amazon.com/cobranded-ui/actions/start?callerKey=AKIAJZOKEUCXF7RKSCNA&callerReference=callerReferenceSingleUse&currency$c$c=USD&paymentReason=HarryPotter%201-5%20DVD%20set&pipelineName=SingleUse&returnURL=http%3A%2F%2Flocalhost%3A8888%2Famazon&signatureMethod=HmacSHA256&signatureVersion=2&transactionAmount=5&version=2009-01-09    私有静态字符串号（字符串数据，字符串键，字符串是SignatureMethod）抛出SignatureException
    {
        的System.out.println（注册模块）;
        字符串特征码=;
        尝试{
            的System.out.println（注册try块）;
            苹果MAC = Mac.getInstance（是SignatureMethod）;
            mac.init（新SecretKeySpec（key.getBytes（），是SignatureMethod））;
            签名=新的String（Base64.en codeBase64（mac.doFinal（data.getBytes（UTF_8_Encoding））））;
            的System.out.println（注册try块）;
        }赶上（例外五）{
            的System.out.println（注册catch块）;
            抛出新的SignatureException（无法生成签名：+ e.getMessage（），E）;
        }
        的System.out.println（结束的标志块+签字）;
        返回签名;
    }
 

解决方案

只是添加的 commons- codec.jar 到你的classpath

Here I'm passing three parameters to this sign method. In this line

signature = new String(Base64.encodeBase64(mac.doFinal(data.getBytes(UTF_8_Encoding))));

I'm getting error:

SEVERE: Servlet.service() for servlet [com.asp.amz.amzServlet] in context with path [/amazon] threw exception [Servlet execution threw an exception] with root cause java.lang.ClassNotFoundException: org.apache.commons.codec.binary.Base64

String Key = z/0qfiE+ScjxHy2gSwmHqP0rZ6fT9zhVgsNt;
String signatureMethod = HmacSHA256;
String data = sandbox.amazon.com/cobranded-ui/actions/start?callerKey=AKIAJZOKEUCXF7RKSCNA&callerReference=callerReferenceSingleUse&currencyCode=USD&paymentReason=HarryPotter%201-5%20DVD%20set&pipelineName=SingleUse&returnURL=http%3A%2F%2Flocalhost%3A8888%2Famazon&signatureMethod=HmacSHA256&signatureVersion=2&transactionAmount=5&version=2009-01-09

    private static String sign(String data, String key, String signatureMethod) throws SignatureException
    {
        System.out.println(" In sign block ");
        String signature = "";
        try {
            System.out.println(" In sign Try block ");
            Mac mac = Mac.getInstance(signatureMethod);
            mac.init(new SecretKeySpec(key.getBytes(), signatureMethod));
            signature = new String(Base64.encodeBase64(mac.doFinal(data.getBytes(UTF_8_Encoding))));
            System.out.println(" In sign Try block ");
        } catch (Exception e) {
            System.out.println(" In sign catch block ");
            throw new SignatureException("Failed to generate signature: " + e.getMessage(), e);         
        }
        System.out.println(" End sign block " + signature);
        return signature;
    }

解决方案

just add commons-codec.jar into your classpath

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