我有一个 Struts2 应用程序,最初是基于 XML 的,但现在我第一次引入了基于注释的操作,并且该应用程序在启动时崩溃了。
鉴于以下操作映射,在应用程序启动时,我收到错误
java.lang.InstantiationError: com.opensymphony.xwork2.util.finder.ClassFinder
at org.apache.struts2.convention.PackageBasedActionConfigBuilder.findActions(PackageBasedActionConfigBuilder.java:390)
at org.apache.struts2.convention.PackageBasedActionConfigBuilder.buildActionConfigs(PackageBasedActionConfigBuilder.java:347)
at org.apache.struts2.convention.ClasspathPackageProvider.loadPackages(ClasspathPackageProvider.java:53)
at com.opensymphony.xwork2.config.impl.DefaultConfiguration.reloadContainer(DefaultConfiguration.java:199)
at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:67)
at org.apache.struts2.dispatcher.Dispatcher.getContainer(Dispatcher.java:906)
at org.apache.struts2.dispatcher.Dispatcher.init_PreloadConfiguration(Dispatcher.java:445)
at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:486)
at org.apache.struts2.dispatcher.InitOperations.initDispatcher(InitOperations.java:75)
at org.apache.struts2.dispatcher.filter.StrutsPrepareAndExecuteFilter.init(StrutsPrepareAndExecuteFilter.java:63)
at org.apache.catalina.core.ApplicationFilterConfig.initFilter(ApplicationFilterConfig.java:279)
这里也有类似的问题,但是没有人回答,Struts2 过滤器异常问题
使用的库:
- struts2-convention-plugin-2.3.14.3.jar
- struts2-core-2.5.10.1.jar
- struts2-json-plugin-2.5.10.1.jar
- struts2-spring-plugin-2.5.10.1.jar
- struts2-tiles-plugin-2.5.10.1.jar
- xwork-core-2.1.6.jar
Update:我认为 Convention-Plugin-JAR 2.3.14.3 与其他 2.5.10.1 不兼容,所以我下载了:struts2-convention-plugin-2.5.10.1.jar
现在启动时得到
java.lang.IncompatibleClassChangeError: org/apache/struts2/convention/DefaultClassFinder$InfoBuildingVisitor
at org.apache.struts2.convention.DefaultClassFinder.readClassDef(DefaultClassFinder.java:459) ~[struts2-convention-plugin-2.5.10.1.jar:2.5.10.1]
at org.apache.struts2.convention.DefaultClassFinder.<init>(DefaultClassFinder.java:90) [struts2-convention-plugin-2.5.10.1.jar:2.5.10.1]
at org.apache.struts2.convention.PackageBasedActionConfigBuilder.buildClassFinder(PackageBasedActionConfigBuilder.java:397) [struts2-convention-plugin-2.5.10.1.jar:2.5.10.1]
at org.apache.struts2.convention.PackageBasedActionConfigBuilder.findActions(PackageBasedActionConfigBuilder.java:379) [struts2-convention-plugin-2.5.10.1.jar:2.5.10.1]
at org.apache.struts2.convention.PackageBasedActionConfigBuilder.buildActionConfigs(PackageBasedActionConfigBuilder.java:335) [struts2-convention-plugin-2.5.10.1.jar:2.5.10.1]
at org.apache.struts2.convention.ClasspathPackageProvider.loadPackages(ClasspathPackageProvider.java:53) [struts2-convention-plugin-2.5.10.1.jar:2.5.10.1]
at com.opensymphony.xwork2.config.impl.DefaultConfiguration.reloadContainer(DefaultConfiguration.java:199) [struts2-core-2.5.10.1.jar:2.5.10.1]
解决方案 解决方案是添加 ASM 5.x JAR,它是注释的 Struts-Convention JAR 的依赖项。我们使用的是 ASM 3.3。我添加了 ASM-Core、-Common、-Tree 版本 5.1 JAR。
struts2-convention 插件 2.5.10.1 具有编译依赖项
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-lang3</artifactId>
<version>3.4</version>
</dependency>
<dependency>
<groupId>org.ow2.asm</groupId>
<artifactId>asm</artifactId>
<version>5.1</version>
</dependency>
<dependency>
<groupId>org.ow2.asm</groupId>
<artifactId>asm-commons</artifactId>
<version>5.1</version>
</dependency>
Note:如果你不需要asm
and asm-commons
您可以将依赖项降级到 Struts 2.5.5。
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