Question

我正在开发用于调度的 Spring + Apache Camel 示例。我创建了applicationContext.xml并为调度添加了<camelContext>详细信息，但是当我只运行我的main方法时。我看到以下错误。不确定XML文件中有什么问题。

参考错误：

INFO: Loading XML bean definitions from class path resource [applicationContext.xml]
Exception in thread "main" org.springframework.beans.factory.xml.XmlBeanDefinitionStoreException: Line 12 in XML document from class path resource [applicationContext.xml] is invalid; nested exception is org.xml.sax.SAXParseException; lineNumber: 12; columnNumber: 25; Attribute name "from" associated with an element type "Hello" must be followed by the ' = ' character.
    at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.doLoadBeanDefinitions(XmlBeanDefinitionReader.java:399)
    at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:336)
    at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:304)
    at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:181)
    at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:217)
    at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:188)
    at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:252)
    at org.springframework.context.support.AbstractXmlApplicationContext.loadBeanDefinitions(AbstractXmlApplicationContext.java:127)
    at org.springframework.context.support.AbstractXmlApplicationContext.loadBeanDefinitions(AbstractXmlApplicationContext.java:93)
    at org.springframework.context.support.AbstractRefreshableApplicationContext.refreshBeanFactory(AbstractRefreshableApplicationContext.java:129)
    at org.springframework.context.support.AbstractApplicationContext.obtainFreshBeanFactory(AbstractApplicationContext.java:612)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:513)
    at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:139)
    at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:83)
    at com.camel.scheduler.CamelTimerSimpleExampleUsingSpring.main(CamelTimerSimpleExampleUsingSpring.java:10)
Caused by: org.xml.sax.SAXParseException; lineNumber: 12; columnNumber: 25; Attribute name "from" associated with an element type "Hello" must be followed by the ' = ' character.
    at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.createSAXParseException(ErrorHandlerWrapper.java:203)
    at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.fatalError(ErrorHandlerWrapper.java:177)
    at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:441)
    at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:368)
    at com.sun.org.apache.xerces.internal.impl.XMLScanner.reportFatalError(XMLScanner.java:1436)
    at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.scanAttribute(XMLNSDocumentScannerImpl.java:418)
    at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.scanStartElement(XMLNSDocumentScannerImpl.java:255)
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(XMLDocumentFragmentScannerImpl.java:2786)
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:606)
    at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.next(XMLNSDocumentScannerImpl.java:117)
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:510)
    at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:848)
    at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:777)
    at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:141)
    at com.sun.org.apache.xerces.internal.parsers.DOMParser.parse(DOMParser.java:243)
    at com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderImpl.parse(DocumentBuilderImpl.java:348)
    at org.springframework.beans.factory.xml.DefaultDocumentLoader.loadDocument(DefaultDocumentLoader.java:76)
    at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.doLoadDocument(XmlBeanDefinitionReader.java:429)
    at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.doLoadBeanDefinitions(XmlBeanDefinitionReader.java:391)
    ... 14 more

的applicationContext.xml

<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
                    http://camel.apache.org/schema/spring http://camel.apache.org/schema/spring/camel-spring.xsd">

    <camelContext xmlns="http://camel.apache.org/schema/spring">
        <route>
            <from uri="timer://simpleTimer?period=1000" />
            <setBody>
                <simple>
                 <Hello from timer at $ header.firedTime } />
                </simple>
            </setBody>
            <to uri="stream:out" />
        </route>
    </camelContext>
</beans>

CamelTimerSimpleExampleUsingSpring.java

public class CamelTimerSimpleExampleUsingSpring {
    public static void main(String[] args) {
        ApplicationContext appContext = new ClassPathXmlApplicationContext("applicationContext.xml");
        CamelContext camelContext = null;
        try {
            camelContext = SpringCamelContext.springCamelContext(appContext, false);

            camelContext.start();
            Thread.sleep(3000);

        } catch (Exception e) {
            System.out.println(e.getMessage());
        }finally {
            try {
                camelContext.stop();
            } catch (Exception e) {
                System.out.println(e.getMessage());
            }
        }
    }
}

的pom.xml

<properties>
        <!-- General Properties -->
        <java.version>1.8</java.version>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>

        <!-- Apache Camel -->
        <apache.camel.version>2.17.3</apache.camel.version>

        <!-- Spring Framework -->
        <spring.version>4.3.1.RELEASE</spring.version>

        <!-- MYSQL -->
        <mysql.version>5.1.39</mysql.version>

        <!-- Logging Framework -->
        <logback.version>1.1.7</logback.version>
        <jcl-over-slf4j.version>1.7.21</jcl-over-slf4j.version>

        <!-- Junit Framework -->
        <junit.version>4.12</junit.version>
    </properties>



    <dependencies>
        <!-- Camel core -->
        <dependency>
            <groupId>org.apache.camel</groupId>
            <artifactId>camel-core</artifactId>
            <version>${apache.camel.version}</version>
        </dependency>

        <!-- camel stream -->
        <dependency>
            <groupId>org.apache.camel</groupId>
            <artifactId>camel-stream</artifactId>
            <version>${apache.camel.version}</version>
        </dependency>

        <!-- camel spring -->
        <dependency>
            <groupId>org.apache.camel</groupId>
            <artifactId>camel-spring</artifactId>
            <version>${apache.camel.version}</version>
        </dependency>

        <!-- camel JDBC -->
        <dependency>
            <groupId>org.apache.camel</groupId>
            <artifactId>camel-jdbc</artifactId>
            <version>${apache.camel.version}</version>
        </dependency>

        <!-- Spring Context -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>${spring.version}</version>
        </dependency>

        <!-- Spring JDBC -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>${spring.version}</version>
        </dependency>

        <!-- MYSQL -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>${mysql.version}</version>
        </dependency>

        <!-- logging, slf4j -->
        <!-- <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>jcl-over-slf4j</artifactId>
            <version>${jcl-over-slf4j.version}</version>
        </dependency>
        <dependency>
            <groupId>ch.qos.logback</groupId>
            <artifactId>logback-classic</artifactId>
            <version>${logback.version}</version>
        </dependency> -->

        <!-- JUnit -->
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>${junit.version}</version>
            <scope>test</scope>
        </dependency>
    </dependencies>

Answer 1

尝试修改applicationContext，如下所示：

<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
                    http://camel.apache.org/schema/spring http://camel.apache.org/schema/spring/camel-spring.xsd">

    <camelContext xmlns="http://camel.apache.org/schema/spring">
        <route>
            <from uri="timer://simpleTimer?period=1000" />
            <setBody>
                <simple>Hello from timer at ${header.firedTime}</simple>
            </setBody>
            <to uri="stream:out" />
        </route>
    </camelContext>
</beans>

Answer 2

要运行此代码，您需要在pom.xml中进行以下更改。您应该首先使用spring依赖项，然后按照pom.xml进行操作，然后应用程序将获得spring-beans-4.2.5.RELEASE，它将给出引发者：java.lang.ClassNotFoundException: org.springframework.beans.factory.config.EmbeddedValueResolver。请使用以下建议的订单和

<dependencies>
        <!-- Spring Context -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>${spring.version}</version>
        </dependency>

        <!-- Spring JDBC -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <!-- Camel core -->
        <dependency>
            <groupId>org.apache.camel</groupId>
            <artifactId>camel-core</artifactId>
            <version>${apache.camel.version}</version>
        </dependency>

        <!-- camel stream -->
        <dependency>
            <groupId>org.apache.camel</groupId>
            <artifactId>camel-stream</artifactId>
            <version>${apache.camel.version}</version>
        </dependency>

        <!-- camel spring -->
        <dependency>
            <groupId>org.apache.camel</groupId>
            <artifactId>camel-spring</artifactId>
            <version>${apache.camel.version}</version>
        </dependency>

        <!-- camel JDBC -->
        <dependency>
            <groupId>org.apache.camel</groupId>
            <artifactId>camel-jdbc</artifactId>
            <version>${apache.camel.version}</version>
        </dependency>

        <!-- MYSQL -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>${mysql.version}</version>
        </dependency>

        <!-- logging, slf4j -->
        <!-- <dependency> <groupId>org.slf4j</groupId> <artifactId>jcl-over-slf4j</artifactId> 
            <version>${jcl-over-slf4j.version}</version> </dependency> <dependency> <groupId>ch.qos.logback</groupId> 
            <artifactId>logback-classic</artifactId> <version>${logback.version}</version> 
            </dependency> -->

        <!-- JUnit -->
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>${junit.version}</version>
            <scope>test</scope>
        </dependency>
    </dependencies>

并使用更正的

<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
        http://camel.apache.org/schema/spring http://camel.apache.org/schema/spring/camel-spring.xsd">
    <camelContext xmlns="http://camel.apache.org/schema/spring">
        <route>
            <from uri="timer://simpleTimer?period=1000" />
            <setBody>
                <simple>Hello from timer at ${header.firedTime}</simple>
            </setBody>
            <to uri="stream:out" />
        </route>
    </camelContext>
</beans>

看起来Alexey Yakunin也提出了正确答案。但我明白了

camelContext = SpringCamelContext.springCamelContext(appContext, false);

不推荐使用

方法，Alexey，你知道应该使用什么吗？

属性名称＆＃34;来自＆＃34;与元素类型相关联＆＃34; Hello＆＃34;必须遵循＆＃39; =＆＃39;字符。 - 阿帕奇骆驼

2 个答案: