java - Oracle OJDBC 驱动程序抛出 NoClassDefFoundError : oracle/i18n/util/LocaleMapper

Question

在 tomcat 8.5 服务器(不是嵌入式 tomcat)上运行时，在我的 Spring Boot 项目中使用 Oracles OJDBC 驱动程序时出现以下错误

NoClassDefFoundError: oracle/i18n/util/LocaleMapper

如果我使用嵌入式 tomcat 运行它，一切正常。不幸的是我需要它在外部容器上运行(我认为它被称为)

我从 https://start.spring.io/ 生成了我的项目

除 oracle 驱动程序外，一切都是默认的。

build.gradle

buildscript {
    ext {
        springBootVersion = '2.0.2.RELEASE'
    }
    repositories {
        mavenCentral()
    }
    dependencies {
        classpath("org.springframework.boot:spring-boot-gradle-plugin:${springBootVersion}")
    }
}

apply plugin: 'java'
apply plugin: 'eclipse-wtp'
apply plugin: 'org.springframework.boot'
apply plugin: 'io.spring.dependency-management'
apply plugin: 'war'

group = 'com.example'
version = '0.0.1-SNAPSHOT'
sourceCompatibility = 1.8

repositories {
    mavenCentral()

    maven {
      credentials {
        username = oracleUser
        password = oraclePass
    }
   url 'https://www.oracle.com/content/secure/maven/content'
  }
}

configurations {
    providedRuntime
}

dependencies {
    compile('org.springframework.boot:spring-boot-starter-web')
    compile('com.oracle.jdbc:ojdbc8:12.2.0.1')
    providedRuntime('org.springframework.boot:spring-boot-starter-tomcat')
    testCompile('org.springframework.boot:spring-boot-starter-test')
}

堆栈跟踪

SEVERE: A child container failed during start
java.util.concurrent.ExecutionException: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/centralized-sourcing-backend]]
    at java.util.concurrent.FutureTask.report(FutureTask.java:122)
    at java.util.concurrent.FutureTask.get(FutureTask.java:192)
    at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:939)
    at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:872)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1419)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1409)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
    at java.lang.Thread.run(Thread.java:748)
Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/centralized-sourcing-backend]]
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:167)
    ... 6 more
Caused by: java.lang.NoClassDefFoundError: oracle/i18n/util/LocaleMapper
    at oracle.xml.parser.v2.XMLReader.setEncoding(XMLReader.java:990)
    at oracle.xml.parser.v2.XMLReader.checkXMLDecl(XMLReader.java:3542)
    at oracle.xml.parser.v2.XMLReader.pushXMLReader(XMLReader.java:580)
    at oracle.xml.parser.v2.XMLReader.pushXMLReader(XMLReader.java:284)
    at oracle.xml.parser.v2.XMLParser.parse(XMLParser.java:243)
    at org.apache.tomcat.util.digester.Digester.parse(Digester.java:1458)
    at org.apache.tomcat.util.descriptor.web.WebXmlParser.parseWebXml(WebXmlParser.java:119)
    at org.apache.tomcat.util.descriptor.web.FragmentJarScannerCallback.scan(FragmentJarScannerCallback.java:77)
    at org.apache.tomcat.util.scan.StandardJarScanner.process(StandardJarScanner.java:342)
    at org.apache.tomcat.util.scan.StandardJarScanner.scan(StandardJarScanner.java:193)
    at org.apache.catalina.startup.ContextConfig.processJarsForWebFragments(ContextConfig.java:1898)
    at org.apache.catalina.startup.ContextConfig.webConfig(ContextConfig.java:1126)
    at org.apache.catalina.startup.ContextConfig.configureStart(ContextConfig.java:775)
    at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:299)
    at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:94)
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5114)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    ... 6 more
Caused by: java.lang.ClassNotFoundException: oracle.i18n.util.LocaleMapper
    at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1285)
    at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1119)
    ... 23 more

我正在像这样从 Spring Tool Suite (STS) 运行项目

我发现其他人也有同样的问题，比如这些

• ClassNotFoundException oracle.i18n.util.LocaleMapper on tomcat TLD scanning. ojdbc7 maven dep (xmlparserv2-12.1.0.2.jar transitive) causes this error
• https://github.com/spring-projects/spring-boot/issues/8682

但我不知道他们在说什么。这是第一次使用 Java 和 Spring 以及 Oracle 和 Eclipse :(

Answer 1

解决方案是执行建议的操作 here而不是试图去理解它。 将一些神奇的文件放在一个神奇的位置(src/main/resources/META-INF/services/)，然后它开始工作了:/