我正在尝试使用新的apachecommons文本新随机字符串生成器,但是在internet上找不到任何关于如何正确导入它的用法。maven构建成功,但是当我尝试使用以下命令从命令行运行jar文件时
java -cp target/my-app-1.0.jar com.mycompany.app.App
…我得到以下错误:
Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/commons/text/RandomStringGenerator$Builder
at com.mycompany.app.App.main(App.java:8)
Caused by: java.lang.ClassNotFoundException: org.apache.commons.text.RandomStringGenerator$Builder
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)
... 1 more
在构建过程中,我还收到以下警告:
The POM for org.apache.commons:commons-text:jar:1.1 is invalid, transitive dependencies (if any) will not be available, enable debug logging for more detail
以下是maven调试版本:
[WARNING] The POM for org.apache.commons:commons-text:jar:1.1 is invalid, transitive dependencies (if any) will not be available: 1 problem was encountered while building the effective model
[FATAL] Non-parseable POM C:\Users\me\.m2\repository\org\apache\commons\commons-text\1.1\commons-text-1.1.pom: only whitespace content allowed before start tag and not a (position: START_DOCUMENT seen a... @1:1) @ line 1, column 1
这是我的 App.java
代码:
package com.mycompany.app;
import org.apache.commons.text.RandomStringGenerator;
public class App {
public static void main(String[] args) {
// Generates a 20 code point string, using only the letters a-z
RandomStringGenerator generator = new RandomStringGenerator.Builder()
.withinRange('a', 'z').build();
String randomLetters = generator.generate(20);
System.out.println( randomLetters );
}
}
这是我的 pom.xml
:
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.mycompany.app</groupId>
<artifactId>my-app</artifactId>
<packaging>jar</packaging>
<version>1.0</version>
<name>my-app</name>
<url>http://maven.apache.org</url>
<dependencies>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-text</artifactId>
<version>1.1</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
</dependencies>
</project>
1条答案
按热度按时间hjqgdpho1#
如果您想从一个jar运行您的应用程序,您将需要一个分解的jar。默认的类加载器不会从您的jar中找到apachejar。
您可以使用shade插件创建一个分解的jar。将下面的内容添加到
pom.xml
:然后,可以运行以下命令: