在Spring集成中将XML转换为Java对象的正确方法是什么？

时间：2016-09-19 17:17:07

标签： java xml spring spring-integration

我一直在寻找一种方法将XML与java对象转换器合并到我的spring集成服务中。这是我肯定必须已经存在的东西，但我遇到的问题是我一直在弹簧集成上找到基于旧版本的文档和教程。

我尝试转换为的类已经使用javax.xml.bind.annotation进行了注释。

这是我目前在我的服务中所拥有的，它基于this page ... 

<?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:int="http://www.springframework.org/schema/integration"
    xmlns:file="http://www.springframework.org/schema/integration/file"
    xmlns:feed="http://www.springframework.org/schema/integration/feed"
    xmlns:jms="http://www.springframework.org/schema/integration/jms"
    xmlns:int-xml="http://www.springframework.org/schema/integration/xml"
    xmlns:oxm="http://www.springframework.org/schema/oxm"
    xsi:schemaLocation="http://www.springframework.org/schema/integration/feed http://www.springframework.org/schema/integration/feed/spring-integration-feed.xsd
        http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/integration http://www.springframework.org/schema/integration/spring-integration.xsd
        http://www.springframework.org/schema/integration/file http://www.springframework.org/schema/integration/file/spring-integration-file.xsd
        http://www.springframework.org/schema/integration/jms http://www.springframework.org/schema/integration/jms/spring-integration-jms.xsd
        http://www.springframework.org/schema/integration/xml http://www.springframework.org/schema/integration/xml/spring-integration-xml-4.2.xsd
        http://www.springframework.org/schema/oxm http://www.springframework.org/schema/oxm/spring-oxm-3.0.xsd">

    .............

    <bean id="unmarshallingTransformer" class="org.springframework.integration.xml.transformer.UnmarshallingTransformer">
        <constructor-arg>
            <bean class="org.springframework.oxm.jaxb.Jaxb2Marshaller">
                <property name="contextPath" value="com.bottomline.cfrm.amq_wfs_bridge.model.audit" />
            </bean>
        </constructor-arg>
    </bean>

    <int-xml:unmarshalling-transformer id="defaultUnmarshaller"
    input-channel="channel_1" output-channel="channel_2"
    unmarshaller="unmarshallingTransformer"/>

    .............

</beans>

但是当我尝试这个时，我得到...... 

org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'org.springframework.integration.xml.transformer.UnmarshallingTransformer#0': Unsatisfied dependency expressed through constructor argument with index 0 of type [org.springframework.oxm.Unmarshaller]: Could not convert constructor argument value of type [org.springframework.integration.xml.transformer.UnmarshallingTransformer] to required type [org.springframework.oxm.Unmarshaller]: Failed to convert value of type [org.springframework.integration.xml.transformer.UnmarshallingTransformer] to required type [org.springframework.oxm.Unmarshaller]; nested exception is java.lang.IllegalStateException: Cannot convert value of type [org.springframework.integration.xml.transformer.UnmarshallingTransformer] to required type [org.springframework.oxm.Unmarshaller]: no matching editors or conversion strategy found
    at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:724) ~[spring-beans-4.2.7.RELEASE.jar:4.2.7.RELEASE]
    at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:185) ~[spring-beans-4.2.7.RELEASE.jar:4.2.7.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor(AbstractAutowireCapableBeanFactory.java:1143) ~[spring-beans-4.2.7.RELEASE.jar:4.2.7.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1046) ~[spring-beans-4.2.7.RELEASE.jar:4.2.7.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:510) ~[spring-beans-4.2.7.RELEASE.jar:4.2.7.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482) ~[spring-beans-4.2.7.RELEASE.jar:4.2.7.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306) ~[spring-beans-4.2.7.RELEASE.jar:4.2.7.RELEASE]
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) ~[spring-beans-4.2.7.RELEASE.jar:4.2.7.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) ~[spring-beans-4.2.7.RELEASE.jar:4.2.7.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197) ~[spring-beans-4.2.7.RELEASE.jar:4.2.7.RELEASE]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:772) ~[spring-beans-4.2.7.RELEASE.jar:4.2.7.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:839) ~[spring-context-4.2.7.RELEASE.jar:4.2.7.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:538) ~[spring-context-4.2.7.RELEASE.jar:4.2.7.RELEASE]
    at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:118) ~[spring-boot-1.3.6.RELEASE.jar:1.3.6.RELEASE]
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:760) ~[spring-boot-1.3.6.RELEASE.jar:1.3.6.RELEASE]
    at org.springframework.boot.SpringApplication.createAndRefreshContext(SpringApplication.java:360) ~[spring-boot-1.3.6.RELEASE.jar:1.3.6.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:306) ~[spring-boot-1.3.6.RELEASE.jar:1.3.6.RELEASE]
    at com.bridge.Application.main(Application.java:14) [classes/:na]

1 个答案:

答案 0 :(得分：1)

不确定您将要达到的目标，但您的StackTrace会说出您需要的所有内容并且您错过了：

Could not convert constructor argument value of type [org.springframework.integration.xml.transformer.UnmarshallingTransformer] to required type [org.springframework.oxm.Unmarshaller]

看，您的代码如下：

unmarshaller="unmarshallingTransformer"

其中unmarshallingTransformer属于UnmarshallingTransformer类型，但要求它类似于org.springframework.oxm.Unmarshaller。

考虑配置Jaxb2Marshaller bean并将其用作对unmarshaller属性的引用。

您无需手动配置UnmarshallingTransformer。 <int-xml:unmarshalling-transformer>将为您做到这一点。

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