alibaba/easyexcel

ClassNotFound

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#4112 opened on May 2, 2025

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help wanted

Description

使用3.1.2版本

com.alibaba.excel.exception.ExcelGenerateException: java.lang.NoClassDefFoundError: com/alibaba/excel/support/cglib/core/NamingPolicy at com.alibaba.excel.write.ExcelBuilderImpl.addContent(ExcelBuilderImpl.java:65) ~[easyexcel-core-3.1.2.jar:?]

Contributor guide

Tech stack
java
Domain
backenddata
Issue type
bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
under 1 hour
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
fresh
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
clear
Prerequisites
basic JavaMaven/Gradledependency management
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
80
Research direction
The issue reports a NoClassDefFoundError for com/alibaba/excel/support/cglib/core/NamingPolicy in easyexcel 3.1.2. This is a missing dependency, likely cglib. The fix involves adding the cglib dependency to the project's build configuration (e.g., Maven pom.xml or Gradle build.gradle) or verifying version compatibility. The stack trace points to ExcelBuilderImpl.addContent, so the dependency is required at runtime. Check the easyexcel documentation for required dependencies.