我有一个xmlConfiguration bean来加载SystemProperty.xml文件,如下所示
<bean
id="xmlConfiguration"
class="org.apache.commons.configuration.XMLConfiguration"
lazy-init="true">
<constructor-arg type="java.lang.String">
<value>SystemProperty.xml</value>
</constructor-arg>
<property name="expressionEngine">
<bean class="org.apache.commons.configuration.tree.xpath.XPathExpressionEngine" />
</property>
</bean>
它运行正常,但是,我必须在XMLConfiguration中将delimiterParsingDisabled设置为true,因此我更改bean以添加属性delimiterParsingDisabled
<bean
id="xmlConfiguration"
class="org.apache.commons.configuration.XMLConfiguration"
lazy-init="true">
<constructor-arg type="java.lang.String">
<value>SystemProperty.xml</value>
</constructor-arg>
<property name="expressionEngine">
<bean class="org.apache.commons.configuration.tree.xpath.XPathExpressionEngine" />
</property>
<property name="delimiterParsingDisabled">
<value type="java.lang.Boolean">true</value>
</property>
</bean>
但是,这不会很好。由于在加载文件之前必须调用setDelimiterParsingDisabled()
。因此,我必须在调用load(String fileName)
setDelimiterParsingDisabled()
我已经以这种方式使用了MethodInvokingFactoryBean
,但是如下所示有任何异常
org.apache.commons.configuration.ConfigurationException: No file name has been set!
at org.apache.commons.configuration.AbstractFileConfiguration.save(AbstractFileConfiguration.java:409)
at org.apache.commons.configuration.AbstractHierarchicalFileConfiguration.save(AbstractHierarchicalFileConfiguration.java:214)
at devicemanage.system.SystemConfigurationServiceImpl.saveSystemProperty(SystemConfigurationServiceImpl.java:232)
at datacollection.service.DataCollectionServiceImpl.syncWithDataCollection(DataCollectionServiceImpl.java:786)
at devicemanage.utility.SyncWithDCListener$1.run(SyncWithDCListener.java:51)
似乎该文件未设置为XMLConfiguration,我的MethodInvokingFactoryBean
描述如下
<bean id="xmlConfigurationMethodInvokingBean"
class="org.springframework.beans.factory.config.MethodInvokingFactoryBean">
<property name="targetObject" ref="xmlConfiguration" />
<property name="targetMethod" value="load" />
<property name="arguments" value="SystemProperty.xml" />
</bean>
原因是,将我的xmlConfiguration
bean更改为不加载文件,而新的构造函数如下所示
<bean
id="xmlConfiguration"
class="org.apache.commons.configuration.XMLConfiguration"
lazy-init="true">
<property name="expressionEngine">
<bean class="org.apache.commons.configuration.tree.xpath.XPathExpressionEngine" />
</property>
<property name="delimiterParsingDisabled">
<value type="java.lang.Boolean">true</value>
</property>
</bean>
不确定我使用MethodInvokingFactoryBean
的方法是否错误,或者我使用了将fileName字符串传递给load()
的参数的错误
感谢任何帮助。
答案 0 :(得分:1)
第一种方式
我建议你创建自己的继承类并声明init-method
:
package beans;
import org.apache.commons.configuration.ConfigurationException;
import org.apache.commons.configuration.XMLConfiguration;
public class CustomXMLConfiguration extends XMLConfiguration {
private String loadFileName;
private void init() throws ConfigurationException {
this.load(fileName);
}
public String getLoadFileName() {
return loadFileName;
}
public void setLoadFileName(String fileName) {
this.loadFileName = fileName;
}
}
在配置中,您可以通过以下方式使用此类:
<bean id="xmlConfiguration" class="beans.CustomXMLConfiguration" lazy-init="true"
init-method="init">
<property name="expressionEngine">
<bean class="org.apache.commons.configuration.tree.xpath.XPathExpressionEngine" />
</property>
<property name="delimiterParsingDisabled">
<value type="java.lang.Boolean">true</value>
</property>
<property name="loadFileName" value="SystemProperty.xml"/>
</bean>
在初始化bean之后,将立即调用 init()
方法。
第二种方式
您可以使用MethodInvokingBean
class的bean。这个类的Bean只是调用目标方法:
<bean class="org.springframework.beans.factory.config.MethodInvokingBean">
<property name="targetObject" ref="xmlConfiguration"/>
<property name="targetMethod" value="load"/>
<property name="arguments" value="SystemProperty.xml"/>
</bean>
我个人更喜欢第一个变种,因为更灵活的自定义并且没有多余的bean实例。但你可以选择任何人。
希望这会有所帮助。