EasyExcel 几十万导入报错问题——java.lang.NoClassDefFoundError

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EasyExcel 报错 NoClassDefFoundError org/ehcache/config/builders/CacheManagerBuilder

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EasyExcel 导入几十万数据报错

今天在执行海量数据数据导入的过程中，当Excel 文件内容超过30W ，就出现导入失败。

报错内容如下：

l.exception.ExcelAnalysisException: java.lang.NoClassDefFoundError: org/ehcache/config/builders/CacheManagerBuilderat l.analysis.ExcelAnalyserImpl.<init>(ExcelAnalyserImpl.java:57) ~[easyexcel-2.2.10.jar:na]at l.ExcelReader.<init>(ExcelReader.java:145) ~[easyexcel-2.2.10.jar:na]at l.read.builder.ExcelReaderBuilder.build(ExcelReaderBuilder.java:193) ~[easyexcel-2.2.10.jar:na]at l.read.builder.ExcelReaderBuilder.sheet(ExcelReaderBuilder.java:229) ~[easyexcel-2.2.10.jar:na]at l.read.builder.ExcelReaderBuilder.sheet(ExcelReaderBuilder.java:217) ~[easyexcel-2.2.10.jar:na]at com.zkh360.ller.demo.ImportFileServive.importFile(ImportFileServive.java:47) ~[classes/:na]at com.zkh360.ller.demo.FileController.importFile(FileController.java:28) ~[classes/:na]flect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_131]flect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_131]flect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_131]at flect.Method.invoke(Method.java:498) ~[na:1.8.0_131]at org.hod.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:190) ~[spring-web-5.2.9.RELEASE.jar:5.2.9.RELEASE]at org.hod.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138) ~[spring-web-5.2.9.RELEASE.jar:5.2.9.RELEASE]at org.springframework.web.hod.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:105) ~[spring-webmvc-5.2.9.RELEASE.jar:5.2.9.RELEASE]at org.springframework.web.hod.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:878) ~[spring-webmvc-5.2.9.RELEASE.jar:5.2.9.RELEASE]at org.springframework.web.hod.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:792) ~[spring-webmvc-5.2.9.RELEASE.jar:5.2.9.RELEASE]at org.springframework.web.hod.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) ~[spring-webmvc-5.2.9.RELEASE.jar:5.2.9.RELEASE]at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1040) ~[spring-webmvc-5.2.9.RELEASE.jar:5.2.9.RELEASE]at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:943) ~[spring-webmvc-5.2.9.RELEASE.jar:5.2.9.RELEASE]at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006) [spring-webmvc-5.2.9.RELEASE.jar:5.2.9.RELEASE]at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:909) [spring-webmvc-5.2.9.RELEASE.jar:5.2.9.RELEASE]at javax.servlet.http.HttpServlet.service(HttpServlet.java:665) [javax.servlet-api-4.0.1.jar:4.0.1]at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883) [spring-webmvc-5.2.9.RELEASE.jar:5.2.9.RELEASE]at javax.servlet.http.HttpServlet.service(HttpServlet.java:750) [javax.servlet-api-4.0.1.jar:4.0.1]at org.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) [tomcat-embed-core-9.0.38.jar:9.0.38]at org.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-9.0.38.jar:9.0.38]at at.websocket.server.WsFilter.doFilter(WsFilter.java:53) [tomcat-embed-websocket-9.0.38.jar:9.0.38]at org.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-9.0.38.jar:9.0.38]at org.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-9.0.38.jar:9.0.38]at com.alibaba.druid.support.http.WebStatFilter.doFilter(WebStatFilter.java:123) [druid-1.1.10.jar:1.1.10]at org.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-9.0.38.jar:9.0.38]at org.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-9.0.38.jar:9.0.38]at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:320) [spring-security-web-5.3.4.RELEASE.jar:5.3.4.RELEASE]at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:126) [spring-security-web-5.3.4.RELEASE.jar:5.3.4.RELEASE]at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:90) [spring-security-web-5.3.4.RELEASE.jar:5.3.4.RELEASE]

本人EasyExcel 使用的版本：Version 2.2.10

        <dependency><groupId>com.alibaba</groupId><artifactId>easyexcel</artifactId><version>2.2.10</version></dependency>

代码如下：

@Slf4j
@Service
public class ImportFileServive implements FileImport {@Overridepublic void importFile(MultipartFile file) {try (InputStream in = InputStream()) {Workbook workBook = null;List<ExcelDataVo> list = InputStream()).head(ExcelDataVo.class).sheet().headRowNumber(1).doReadSync();log.info("实际获取数据：{}",list.size())} catch (IOException e) {("importExcel failed IOException", e);}}}@Data
public class ExcelDataVo {@ExcelProperty("Id")private String id;@ExcelProperty("custNumber")private String custName;@ExcelProperty("custNumber")private String custNumber;@ExcelProperty("text01")private String text01;@ExcelProperty("text02")private String text02;@ExcelProperty("text03")private String text03;@ExcelProperty("text04")private String text04;@ExcelProperty("text05")private String text05;
}

问题定位

经过定位EasyExcel官网发现
EasyExcel 在使用过程中超过5M 会使用Ehcache

我这边本地代码由于Ehcache 是一个老版本3.0 的版本，初步猜测版本导致。

解决思路

方案一

直接升级ehcache 版本

<dependency><groupId>org.ehcache</groupId><artifactId>ehcache</artifactId><version>3.9.9</version><scope>compile</scope></dependency>

PS ：注意easyexcel 如果使用低版本的 easyexcel 需要将其 exclusions 掉

 <dependency><groupId>com.alibaba</groupId><artifactId>easyexcel</artifactId><version>2.2.10</version><exclusions><exclusion><groupId>org.ehcache</groupId><artifactId>ehcache</artifactId></exclusion></exclusions></dependency>

方案二采用MapCache 替换解决

有的小伙伴在开发过程，可能改的老代码强制升级可能让原始代码使用Ehcache 功能过程收到影响。

对于一个优秀程序员来说，老代码程序能跑就不要轻易大改！！！

在原始代码中加入 readCache(new MapCache())

@Slf4j
@Service
public class ImportFileServive implements FileImport {@Overridepublic void importFile(MultipartFile file) {try (InputStream in = InputStream()) {Workbook workBook = null;List<ExcelDataVo> list = InputStream()).readCache(new MapCache()).head(ExcelDataVo.class).sheet().headRowNumber(1).doReadSync();log.info("实际获取数据：{}",list.size())} catch (IOException e) {("importExcel failed IOException", e);}}
}