为什么我总是使用 foreach 得到 ArrayIndexOutOfBoundsException答案

【问题标题】：why do I always get ArrayIndexOutOfBoundsException using foreach为什么我总是使用 foreach 得到 ArrayIndexOutOfBoundsException
【发布时间】：2017-09-05 07:21:52
【问题描述】：

我使用流将旧代码更改为新代码。但是当我启动tomcat时，它一直在变

错误 o.s.web.servlet.DispatcherServlet - 上下文初始化失败 org.springframework.beans.factory.BeanDefinitionStoreException: 读取候选组件类失败: 文件 xxx(my FilePath) 嵌套异常是 java.lang.ArrayIndexOutOfBoundsException: 25091"

谁能告诉我是什么导致了这个错误？非常感谢您的帮助。

/*old*/
for(String key:paramMap.keySet()){
    if(key.startsWith("NUMBER_OF_") ){
        String value = request.getParameter(key);
        if(value!=null && !value.equals("")){
            br.append(key.replace("NUMBER_OF_", "")).append(" = ")
                .append('"').append(value).append('"').append(" and ");
        }
    }
}

/*new*/
new ArrayList<>(paramMap.keySet()).stream().filter(p -> p.startsWith("NUMBER_OF_")).forEach(
    o ->{
        String value = request.getParameter(o);
        if(value!=null && !value.equals("")){
            br.append(o.replace("NUMBER_OF_", "")).append(" = ")
                .append('"').append(value).append('"').append(" and ");
        }
    });

整个堆栈跟踪：

org.springframework.beans.factory.BeanDefinitionStoreException: Failed to read candidate component class: file [D:\apache-tomcat-7.0.61\webapps\web\WEB-INF\classes\com\ais\brm\web\controllers\system\metadic\MetaDicManageController.class]; nested exception is java.lang.ArrayIndexOutOfBoundsException
org.springframework.context.annotation.ClassPathScanningCandidateComponentProvider.findCandidateComponents(ClassPathScanningCandidateComponentProvider.java:260)
org.springframework.context.annotation.ClassPathBeanDefinitionScanner.doScan(ClassPathBeanDefinitionScanner.java:242)
org.springframework.context.annotation.ComponentScanBeanDefinitionParser.parse(ComponentScanBeanDefinitionParser.java:84)
org.springframework.beans.factory.xml.NamespaceHandlerSupport.parse(NamespaceHandlerSupport.java:73)
org.springframework.beans.factory.xml.BeanDefinitionParserDelegate.parseCustomElement(BeanDefinitionParserDelegate.java:1419)
org.springframework.beans.factory.xml.BeanDefinitionParserDelegate.parseCustomElement(BeanDefinitionParserDelegate.java:1409)
org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.parseBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:184)
org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.doRegisterBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:140)
org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.registerBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:111)
org.springframework.beans.factory.xml.XmlBeanDefinitionReader.registerBeanDefinitions(XmlBeanDefinitionReader.java:493)
org.springframework.beans.factory.xml.XmlBeanDefinitionReader.doLoadBeanDefinitions(XmlBeanDefinitionReader.java:390)
org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:334)
org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:302)
org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:174)
org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:209)
org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:180)
org.springframework.web.context.support.XmlWebApplicationContext.loadBeanDefinitions(XmlWebApplicationContext.java:125)
org.springframework.web.context.support.XmlWebApplicationContext.loadBeanDefinitions(XmlWebApplicationContext.java:94)
org.springframework.context.support.AbstractRefreshableApplicationContext.refreshBeanFactory(AbstractRefreshableApplicationContext.java:131)
org.springframework.context.support.AbstractApplicationContext.obtainFreshBeanFactory(AbstractApplicationContext.java:522)
org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:436)
org.springframework.web.servlet.FrameworkServlet.configureAndRefreshWebApplicationContext(FrameworkServlet.java:631)
org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:588)
org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:645)
org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:508)
org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:449)
org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:133)
javax.servlet.GenericServlet.init(GenericServlet.java:158)
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:505)
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950)
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:423)
org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1079)
org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:620)
org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:318)
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
java.lang.Thread.run(Thread.java:745)

【问题讨论】：

你通常会做paramMap.keySet().stream().filter(等
错误依然存在：嵌套异常为java.lang.ArrayIndexOutOfBoundsException。
你确定那段特定的代码会发生这种情况吗？
@RickGeng 发布整个堆栈跟踪会有所帮助
@Eugene 我已经添加了

标签： foreach java-stream indexoutofboundsexception

【解决方案1】：

Spring 3（在本例中为 spring-asm）不支持 Java8 功能。您应该将代码返回到 Java7（“旧”变体）或将 Spring 升级到上面 Eugene 提到的 4.0.3。

【讨论】：

【解决方案2】：

根据this，你需要Spring版本至少4.0.3支持java 8特性。

【讨论】：