NoClassDefFoundError：org / apache / commons / lang3 / StringUtils

Question

我正在尝试使用此库运行示例项目，但出现以下错误：

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

我在 libs* 和 classpath中 添加了 commons-lang-2.6.jar 和 commons-
lang3-3.1-sources.jar
***

主班：

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);
    }
}

我已提及以下链接：

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

• 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

Answer 1

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

这是您的问题： commons- lang-2.6.jar不包含org.apache.commons.lang3软件包，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。

您需要包括在内commons-lang3-3.1.jar。