NoClassDefFoundError:org/apache/commons/lang3/StringUtils

Question

我正在尝试运行使用此库的示例pcsc项目.

运行它时,我收到以下错误

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和类路径中添加了commons-lang-2.6.jar&commons-lang3-3.1-sources.jar.我仍然得到这个错误

码

public static void main(final String[] args) throws CardException, CommunicationException {


    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);
    }

}

我已经提到了以下链接:

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

请帮忙 !

Answer 1

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

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

你需要包括commons-lang3-3.1.jar.

Answer 2

如果你正在使用Maven将它放在你的pom.xml中:

<dependency>
    <groupId>commons-lang</groupId>
    <artifactId>commons-lang</artifactId>
    <version>2.6</version>
</dependency>

<dependency>
    <groupId>org.apache.commons</groupId>
    <artifactId>commons-lang3</artifactId>
    <version>3.1</version>
</dependency>

不要忘记更新项目

Apache Commons Lang™依赖信息 - 最新版本3.8(发布日期:2018年8月20日)

Apache Maven

<dependency>
  <groupId>org.apache.commons</groupId>
  <artifactId>commons-lang3</artifactId>
  <version>3.8</version>
</dependency>

摇篮/ Grails的

compile 'org.apache.commons:commons-lang3:3.8'

Apache Buildr

'org.apache.commons:commons-lang3:jar:3.8'

Apache常春藤

<dependency org="org.apache.commons" name="commons-lang3" rev="3.8">
  <artifact name="commons-lang3" type="jar" />
</dependency>

Groovy葡萄

@Grapes(
@Grab(group='org.apache.commons', module='commons-lang3', version='3.8')
)

Scala SBT

libraryDependencies += "org.apache.commons" % "commons-lang3" % "3.8

Leiningen

[org.apache.commons/commons-lang3 "3.8"]

参考:

https://commons.apache.org/proper/commons-lang/dependency-info.html