NoClassDefFoundError: org/apache/commons/lang3/StringUtils [英] NoClassDefFoundError: org/apache/commons/lang3/StringUtils

问题描述

我正在尝试使用 this 库运行示例项目，我得到以下错误:

I'm trying to run the sample project with this library and I get the following error:

Exception in thread "main" java.lang.NoClassDefFoundError: 

    org/apache/commons/lang3/StringUtils

    at com.github.devnied.emvnfccard.enums.EmvCardScheme.<init>(EmvCardScheme.java:97)
    at com.github.devnied.emvnfccard.enums.EmvCardScheme.<clinit>(EmvCardScheme.java:32)
    at com.github.devnied.emvnfccard.parser.EmvParser.readWithAID(EmvParser.java:277)
    at com.github.devnied.emvnfccard.parser.EmvParser.readEmvCard(EmvParser.java:120)
    at com.github.devnied.emvpcsccard.Main.main(Main.java:64)
Caused by: java.lang.ClassNotFoundException: org.apache.commons.lang3.StringUtils
    at java.net.URLClassLoader$1.run(Unknown Source)
    at java.net.URLClassLoader$1.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    ... 5 more

我添加了 commons-lang-2.6.jar &commons-lang3-3.1-sources.jar 在 libs 和 classpath

I've added commons-lang-2.6.jar & commons-lang3-3.1-sources.jar in libs and classpath

主类:

public static void main(final String[] args) throws CardException {
    Main pcsc = new Main();
    CardTerminal ct = pcsc.selectCardTerminal();
    Card c = null;
    if (ct != null) {
        c = pcsc.establishConnection(ct);
        CardChannel channel = c.getBasicChannel();
        PcscProvider provider = new PcscProvider(channel);
        EmvParser parser = new EmvParser(provider, false);
        parser.readEmvCard();
        c.disconnect(false);
    }
}

我参考了以下链接:

• java.lang.ClassNotFoundException:org.apache.commons.lang.StringUtils 来自 BaseClassLoader

Struts 2 框架演示

http://apache-commons.680414.n4.nabble.com/lang-java-lang-NoClassDefFoundError-org-apache-commons-lang-StringUtils-Exception-td3735881.html

推荐答案

我添加了 commons-lang-2.6.jar &commons-lang3-3.1-sources.jar...

I have added commons-lang-2.6.jar & commons-lang3-3.1-sources.jar...

这是您的问题:commons-lang-2.6.jar 不包含 org.apache.commons.lang3 包，因为它是版本 3 的一部分，并且commons-lang3-3.1-sources.jar 包含源代码，而不是字节码.

Here's your problem: commons-lang-2.6.jar doesn't contain the org.apache.commons.lang3 package, since that's part of version 3, and commons-lang3-3.1-sources.jar contains the source code, not the byte code.

您需要改为包含 commons-lang3-3.1.jar.

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