Struts 2.5 Java8ClassFinder:'；无法读取类'；错误

我已经将传统Struts 2.5应用程序与Spring Boot 2集成。应用程序功能正常，但在启动时会引发此异常，如何避免此错误？还是可以安全地忽略这一点？多谢各位

我正在使用的主要依赖项：

• JDK-11.0.4
• 字符串引导v。2.2.6
• struts2 v。2.5.22
• struts2 jquery插件v。4.0.3
• struts2约定插件v。2.5.22
• struts2-java8-support-plugin v。2.5.2

我的Struts配置如下，我正在使用基于注释的动作配置

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC
        "-//Apache Software Foundation//DTD Struts Configuration 2.5//EN"
        "http://struts.apache.org/dtds/struts-2.5.dtd">
<struts>
    <constant name="struts.enable.DynamicMethodInvocation" value="false" />
    <constant name="struts.devMode" value="true"/>
    <constant name="struts.action.extension" value="html"/>
    <constant name="struts.convention.action.packages" value="com.xxx.yyy.zzz.action"/>
    <constant name="struts.convention.classes.reload" value="false" />
    <constant name="struts.convention.exclude.parentClassLoader" value="false" />
    <constant name="struts.custom.i18n.resources" value="messages" />

    <package name="default" extends="struts-default" namespace="/">
    </package>

    <constant name="struts.ckeditor.allowUploads" value="true" />
    <constant name="struts.ckeditor.allowedFileExtensions" value="jpg,jpeg,png" />
    <constant name="struts.ckeditor.uploadFolder" value="/imageUploads" />
</struts>

启动时错误日志

07:33.081  INFO 13309 --- [           main] o.a.s.spring.StrutsSpringObjectFactory   : Initializing Struts-Spring integration...
2020-04-26 11:07:33.081  INFO 13309 --- [           main] c.o.xwork2.spring.SpringObjectFactory    : Setting autowire strategy to name
2020-04-26 11:07:33.082  INFO 13309 --- [           main] o.a.s.spring.StrutsSpringObjectFactory   : ... initialized Struts-Spring integration successfully
2020-04-26 11:07:33.581 ERROR 13309 --- [           main] o.a.struts2.convention.Java8ClassFinder  : Unable to read class [com.xxx.yyy.zzz.action.IndexAction]

java.lang.IllegalArgumentException: null
    at org.objectweb.asm.ClassReader.<init>(Unknown Source) ~[asm-5.0.2.jar:5.0.2]
    at org.objectweb.asm.ClassReader.<init>(Unknown Source) ~[asm-5.0.2.jar:5.0.2]
    at org.objectweb.asm.ClassReader.<init>(Unknown Source) ~[asm-5.0.2.jar:5.0.2]
    at org.apache.struts2.convention.Java8ClassFinder.readClassDef(Java8ClassFinder.java:442) ~[struts2-java8-support-plugin-2.5.2.jar:2.5.22]
    at org.apache.struts2.convention.Java8ClassFinder.access$200(Java8ClassFinder.java:61) ~[struts2-java8-support-plugin-2.5.2.jar:2.5.22]
    at org.apache.struts2.convention.Java8ClassFinder$InfoBuildingClassVisitor.extractSuperInterfaces(Java8ClassFinder.java:495) ~[struts2-java8-support-plugin-2.5.2.jar:2.5.22]
    at org.apache.struts2.convention.Java8ClassFinder$InfoBuildingClassVisitor.visit(Java8ClassFinder.java:482) ~[struts2-java8-support-plugin-2.5.2.jar:2.5.22]
    at org.objectweb.asm.ClassReader.accept(Unknown Source) ~[asm-5.0.2.jar:5.0.2]
    at org.objectweb.asm.ClassReader.accept(Unknown Source) ~[asm-5.0.2.jar:5.0.2]
    at org.apache.struts2.convention.Java8ClassFinder.readClassDef(Java8ClassFinder.java:443) ~[struts2-java8-support-plugin-2.5.2.jar:2.5.22]
    at org.apache.struts2.convention.Java8ClassFinder.access$200(Java8ClassFinder.java:61) ~[struts2-java8-support-plugin-2.5.2.jar:2.5.22]
    at org.apache.struts2.convention.Java8ClassFinder$InfoBuildingClassVisitor.extractSuperInterfaces(Java8ClassFinder.java:495) ~[struts2-java8-support-plugin-2.5.2.jar:2.5.22]
    at org.apache.struts2.convention.Java8ClassFinder$InfoBuildingClassVisitor.visit(Java8ClassFinder.java:482) ~[struts2-java8-support-plugin-2.5.2.jar:2.5.22]
    .......
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1215) ~[spring-boot-2.2.6.RELEASE.jar:2.2.6.RELEASE]
    at com.xxx.yyy.zzz.Application.main(Application.java:18) ~[classes/:na]

2020-04-26 11:07:34.078  INFO 13309 --- [           main] o.s.s.concurrent.ThreadPoolTaskExecutor  : Initializing ExecutorService 'applicationTaskExecutor' 

07:33.081信息13309-[main]o.a.s.spring.StrutsSpringObjectFactory:初始化Struts-spring集成。。。
2020-04-26 11:07:33.081信息13309---[main]c.o.xwork2.spring.SpringObjectFactory:将autowire策略设置为name
2020-04-26 11:07:33.082信息13309---[main]o.a.s.spring.StrutsSpringObjectFactory:。。。已成功初始化Struts-Spring集成
2020-04-26 11:07:33.581错误13309---[main]o.a.struts2.convention.Java8ClassFinder:无法读取类[com.xxx.yyy.zzz.action.IndexAction]
java.lang.IllegalArgumentException:null
在org.objectweb.asm.ClassReader.（未知来源）~[asm-5.0.2.jar:5.0.2]
在org.objectweb.asm.ClassReader.（未知来源）~[asm-5.0.2.jar:5.0.2]
在org.objectweb.asm.ClassReader.（未知来源）~[asm-5.0.2.jar:5.0.2]
在org.apache.struts2.convention.Java8ClassFinder.readClassDef（Java8ClassFinder.java:442）~[struts2-java8-support-plugin-2.5.2.jar:2.5.22]
在org.apache.struts2.convention.Java8ClassFinder.access$200（Java8ClassFinder.java:61）~[struts2-java8-support-plugin-2.5.2.jar:2.5.22]
在org.apache.struts2.convention.Java8ClassFinder$InfoBuildingClassVisitor.extractSuperInterface（Java8ClassFinder.java:495）~[struts2-java8-support-plugin-2.5.2.jar:2.5.22]
在org.apache.struts2.convention.Java8ClassFinder$InfoBuildingClassVisitor.visit（Java8ClassFinder.java:482）~[struts2-java8-support-plugin-2.5.2.jar:2.5.22]
在org.objectweb.asm.ClassReader.accept（未知源）~[asm-5.0.2.jar:5.0.2]
在org.objectweb.asm.ClassReader.accept（未知源）~[asm-5.0.2.jar:5.0.2]
在org.apache.struts2.convention.Java8ClassFinder.readClassDef（Java8ClassFinder.java:443）~[struts2-java8-support-plugin-2.5.2.jar:2.5.22]
在org.apache.struts2.convention.Java8ClassFinder.access$200（Java8ClassFinder.java:61）~[struts2-java8-support-plugin-2.5.2.jar:2.5.22]
在org.apache.struts2.convention.Java8ClassFinder$InfoBuildingClassVisitor.extractSuperInterface（Java8ClassFinder.java:495）~[struts2-java8-support-plugin-2.5.2.jar:2.5.22]
在org.apache.struts2.convention.Java8ClassFinder$InfoBuildingClassVisitor.visit（Java8ClassFinder.java:482）~[struts2-java8-support-plugin-2.5.2.jar:2.5.22]
.......
在org.springframework.boot.SpringApplication.run（SpringApplication.java:1215）~[spring-boot-2.2.6.RELEASE.jar:2.2.6.RELEASE]
在com.xxx.yyy.zzz.Application.main（Application.java:18）~[classes/:na]
2020-04-26 11:07:34.078信息13309---[main]o.s.s.concurrent.ThreadPoolTaskExecutor:初始化ExecutorService'applicationTaskExecutor'

“legacy Struts”+JDK-14.0.1，您会发现错误。是的，这并不奇怪为了支持Java14，您需要将ASM从5.0.2版升级到7.2版，希望Struts2能够处理这个问题。有关详细信息，请参阅。抱歉，这是打字错误。。我的意思是jdk-11.0.4（现在已经更正了）。。。无论如何，在将其更新到ASM 8.0后，它工作正常，没有任何问题。。谢谢@Andreas“legacy Struts”+JDK-14.0.1，您会发现错误。是的，这并不奇怪为了支持Java14，您需要将ASM从5.0.2版升级到7.2版，希望Struts2能够处理这个问题。有关详细信息，请参阅。抱歉，这是打字错误。。我的意思是jdk-11.0.4（现在已经更正了）。。。无论如何，在将其更新到ASM 8.0后，它工作正常，没有任何问题。。谢谢你，安德烈亚斯