Apache POI error loading XSSFWorkbook class

问题

I\'m trying to write a program that works with Excel docs, but the HSSF format is too small for my requirements. I\'m attempting to move to XSSF, but I keep getting errors when trying to use it.

I managed to solve the first two by adding xmlbeans-2.3.0.jar and dom4j-1.6.jar to my program, but now this error is coming up, which doesn\'t seem to be resolved by adding the Apache commons jar available on the Apache website.

The error is as follows:

Exception in thread \"main\" java.lang.NoClassDefFoundError: org/apache/commons/collections4/ListValuedMap
    at hot.memes.ExcelCreator.main(ExcelCreator.java:66)
Caused by: java.lang.ClassNotFoundException: org.apache.commons.collections4.ListValuedMap
    at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    ... 1 more

回答1:

Add commons-collections4-x.x.jar file in your build path and try it again. It will work.

You can download it from https://mvnrepository.com/artifact/org.apache.commons/commons-collections4/4.0

回答2:

commons-collections4-x.x.jar definitely solve this problem but Apache has removed the Interface ListValuedMap from commons-Collections4-4.0.jar so use updated version 4.1 it has the required classes and Interfaces.

Refer here if you want to read Excel (2003 or 2007+) using java code.

http://www.codejava.net/coding/how-to-read-excel-files-in-java-using-apache-poi

回答3:

Hurrah! Adding commons-collections jar files to my project resolved this problem. Two thumbs up to Lucky Sharma.

Solution: Add commons-collections4-4.1.jar file in your build path and try it again. It will work.

You can download it from https://mvnrepository.com/artifact/org.apache.commons/commons-collections4/4.1

回答4:

Please note that 4.0 is not sufficient since ListValuedMap, was introduced in version 4.1.

You need to use this maven repository link for version 4.1. Replicated below for convenience

 <!-- https://mvnrepository.com/artifact/org.apache.commons/commons-collections4 -->
 <dependency>
   <groupId>org.apache.commons</groupId>
   <artifactId>commons-collections4</artifactId>
   <version>4.1</version>
</dependency>

回答5:

Yeah, resolved the exception by adding commons-collections4-4.1 jar file to the CLASSPATH user varible of system. Downloaded from https://mvnrepository.com/artifact/org.apache.commons/commons-collections4/4.1

来源：https://stackoverflow.com/questions/39670382/apache-poi-error-loading-xssfworkbook-class

标签

java

apache

apache-poi

xssf