我創(chuàng)建 CSV 到 XLSX 應(yīng)用程序 -我的第一個問題Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/poi/xssf/usermodel/XSSFWorkbook at com.test.csv2xlsx.Csv2Xlsx.<init>(Csv2Xlsx.java:35) at com.test.csv2xlsx.Csv2Xlsx.main(Csv2Xlsx.java:49)Caused by: java.lang.ClassNotFoundException: org.apache.poi.xssf.usermodel.XSSFWorkbook 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) ... 2 more我閱讀了有關(guān)此錯誤的所有文章，但我已經(jīng)擁有所有依賴項<dependencies> <dependency> <groupId>org.apache.poi</groupId> <artifactId>poi-ooxml</artifactId> <version>4.1.0</version> </dependency> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.12</version> <scope>test</scope> </dependency> <dependency> <groupId>org.apache.poi</groupId> <artifactId>poi</artifactId> <version>4.1.0</version> </dependency> <dependency> <groupId>org.hamcrest</groupId> <artifactId>hamcrest-core</artifactId> <version>1.3</version> </dependency> <dependency> <groupId>org.apache.xmlbeans</groupId> <artifactId>xmlbeans</artifactId> <version>3.1.0</version> </dependency> <dependency> <groupId>org.apache.poi</groupId> <artifactId>poi-ooxml-schemas</artifactId> <version>4.1.0</version> </dependency> <dependency> <groupId>org.apache.commons</groupId> <artifactId>commons-collections4</artifactId> <version>4.3</version> </dependency> </dependencies>現(xiàn)在我不確定問題出在哪里
1 回答
慕的地8271018
TA貢獻1796條經(jīng)驗 獲得超4個贊
這是一個很常見的問題。您的項目的依賴項未包含在您執(zhí)行的 jar 中，導(dǎo)致NoClassDefFoundError.
要解決此問題，請將其添加到plugins您的部分pom.xml：
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-assembly-plugin</artifactId>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>single</goal>
</goals>
<configuration>
<archive>
<manifest>
<mainClass>
com.mypackage.Main
</mainClass>
</manifest>
</archive>
<descriptorRefs>
<descriptorRef>jar-with-dependencies</descriptorRef>
</descriptorRefs>
</configuration>
</execution>
</executions>
</plugin>
然后執(zhí)行mvn clean package，當在目標目錄中完成時，您將找到一個jar_name-jar-with-dependencies.jar包含所有必需依賴項的可執(zhí)行文件。
最后干脆run java -jar jar_name-jar-with-dependencies.jar。
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