Maven依赖冲突问题及解决过程_Java

引言

在开发过程中你的maven依赖有冲突，但是打包的jar包照样可以运行只有使用到冲突包里的功能时会报依赖冲突错误比如：

java.lang.noclassdeffounderror: org/apache/poi/util/poilogfactory
   at org.apache.poi.hwpf.model.fileinformationblock.<clinit>(fileinformationblock.java:52) ~[poi-scratchpad-4.1.2.jar!/:4.1.2]
   at org.apache.poi.hwpf.hwpfdocumentcore.<init>(hwpfdocumentcore.java:170) ~[poi-scratchpad-4.1.2.jar!/:4.1.2]
   at org.apache.poi.hwpf.hwpfdocument.<init>(hwpfdocument.java:193) ~[poi-scratchpad-4.1.2.jar!/:4.1.2]
   at org.apache.poi.hwpf.hwpfdocument.<init>(hwpfdocument.java:177) ~[poi-scratchpad-4.1.2.jar!/:4.1.2]
   at org.apache.poi.hwpf.hwpfdocument.<init>(hwpfdocument.java:165) ~[poi-scratchpad-4.1.2.jar!/:4.1.2]
   at com.zxx.hand.wordhandler.handcontent(wordhandler.java:47) ~[classes!/:1.0]
   at com.zxx.hand.documentattachmenthandler.getattachmentinfo(documentattachmenthandler.java:51) ~[classes!/:1.0]
   at com.zxx.elasticsearch.fileanalysiselasticsearchtask.fileanalysis(fileanalysiselasticsearchtask.java:64) ~[classes!/:1.0]
   at com.zxx.service.impl.fileanalysisserviceimpl$1.run(fileanalysisserviceimpl.java:50) ~[classes!/:1.0]
   at java.base/java.util.concurrent.executors$runnableadapter.call(executors.java:515) ~[na:na]
   at java.base/java.util.concurrent.futuretask.run(futuretask.java:264) ~[na:na]
   at java.base/java.util.concurrent.scheduledthreadpoolexecutor$scheduledfuturetask.run(scheduledthreadpoolexecutor.java:304) ~[na:na]
   at java.base/java.util.concurrent.threadpoolexecutor.runworker(threadpoolexecutor.java:1128) ~[na:na]
   at java.base/java.util.concurrent.threadpoolexecutor$worker.run(threadpoolexecutor.java:628) ~[na:na]
   at java.base/java.lang.thread.run(thread.java:834) ~[na:na]
caused by: java.lang.classnotfoundexception: org.apache.poi.util.poilogfactory
   at java.base/java.net.urlclassloader.findclass(urlclassloader.java:476) ~[na:na]
   at java.base/java.lang.classloader.loadclass(classloader.java:588) ~[na:na]
   at org.springframework.boot.loader.launchedurlclassloader.loadclass(launchedurlclassloader.java:151) ~[nnd-document-parser.jar:1.0]
   at java.base/java.lang.classloader.loadclass(classloader.java:521) ~[na:na]
   ... 15 common frames omitted

1、找出冲突包

1.1 找到pom.xml文件

1.2 点击show diagrams查看依赖图

右击pom.xml文件点击--》show diagrams

如下图会列出冲突包

2、移除冲突包

maven移除包中依赖

        <dependency>
            <groupid>org.apache.poi</groupid>
            <artifactid>poi-ooxml</artifactid>
            <version>${poi.version}</version>
            <!-- 移除包中依赖 -->
            <exclusions>
                <exclusion>
                    <groupid>org.apache.poi</groupid>
                    <artifactid>poi</artifactid>
                </exclusion>
            </exclusions>
        </dependency>