从Java启动Spring应用程序的异常

  • Z时代
  • 2024-01-10
  • 分类：问答

我能够使用Maven编译并启动Spring项目：

mvn -e clean compile exec:java -Dexec.mainClass=de.fraunhofer.fkie.tet.vmware.manager.Test

但是，当我使用maven-assembly-plugin（包括applicationContext.xml）将所有jar组装到一个文件中时，Exception在java执行过程中总是会得到一个：

java -cp target/test-jar-with-dependencies.jar:. de.fraunhofer.fkie.tet.vmware.manager.Test
  INFO: Loading XML bean definitions from class path resource [applicationContext.xml]
  Sep 6, 2010 10:37:21 AM org.springframework.util.xml.SimpleSaxErrorHandler warning
  WARNING: Ignored XML validation warning
  org.xml.sax.SAXParseException: schema_reference.4: Failed to read schema document 'http://www.springframework.org/schema/context/spring-context.xsd', because 1) could not find the document; 2) the document could not be read; 3) the root element of the document is not <xsd:schema>.
  ...
  Exception in thread "main" org.springframework.beans.factory.xml.XmlBeanDefinitionStoreException: 
  Line 10 in XML document from class path resource [applicationContext.xml] is invalid; nested exception is org.xml.sax.SAXParseException: cvc-complex-type.2.4.c: 
  The matching wildcard is strict, but no declaration can be found for element 'context:annotation-config'.
  ...
  Caused by: org.xml.sax.SAXParseException: cvc-complex-type.2.4.c: 
  The matching wildcard is strict, but no declaration can be found for element 'context:annotation-config'.

我还尝试将架构定义（即spring-context.xsd等）直接附加到类路径，但是没有成功。

less src/main/resources/applicationContext.xml
  <?xml version="1.0" encoding="UTF-8"?>
  <beans xmlns="http://www.springframework.org/schema/beans"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xmlns:context="http://www.springframework.org/schema/context"
         xsi:schemaLocation="http://www.springframework.org/schema/beans
                             http://www.springframework.org/schema/beans/spring-beans.xsd
                             http://www.springframework.org/schema/context 
                             http://www.springframework.org/schema/context/spring-context.xsd">
      <context:annotation-config />   <!-- wegen '@PostConstruct' -->
  <!--<context:component-scan base-package="de.fraunhofer" />     -->
  ...
  </beans>

回答：

Spring命名空间处理程序使用文件/META-INF/spring.schemas和解析/META-INF/spring.handlers。由于具有这些名称的文件存在于不同的Spring jar中，因此之后可能仅其中一个保留在目标jar中maven-assembly-plugin。

也许你可以手动合并这些文件，然后以某种方式配置maven-assembly-plugin为使用此合并文件覆盖目标jar中的文件。

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