如何从属性文件中获取值以在springConfig.xml中输入

Question

我想获取email.properties文件中的属性值，以便在springConfig.xml中输入。但是发生了错误。

这是我的代码

springConfig.xml

<bean class="org.springframework.mail.javamail.JavaMailSenderImpl"
    id="mailSender">
    <property name="host" value="${email.host}" />
    <property name="protocol" value="${email.protocol}" />
    <property name="port" value="${email.port}" />
    <property name="username" value="${email.username}"/>
    <property name="password" value="${email.password}" />
    <property name="javaMailProperties">
        <props>
            <prop key="mail.smtp.auth">true</prop>
            <prop key="mail.smtp.starttls.enable">true</prop>
            <prop key="mail.smtp.ssl.trust">smtp.gmail.com</prop>
        </props>
    </property>
</bean>

这是属性文件

email.host=stmp.gmail.com
email.port=465
email.protocol=smtp
email.username=xxx@gmail.com
email.password=xxxxxxxx

这是错误跟踪

Jun 15, 2015 10:46:17 AM org.apache.catalina.core.StandardContext listenerStart
SEVERE: Exception sending context initialized event to listener instance of class org.springframework.web.context.ContextLoaderListener
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'mailSender' defined in class path resource [springConfig.xml]: Initialization of bean failed; nested exception is org.springframework.beans.TypeMismatchException: Failed to convert property value of type 'java.lang.String' to required type 'int' for property 'port'; nested exception is java.lang.NumberFormatException: For input string: "${email.port}"
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:547)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:475)
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:304)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:300)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:195)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:700)
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:760)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:482)
    at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:403)
    at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:306)
    at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:106)
    at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4751)
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5175)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1408)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1398)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)
Caused by: org.springframework.beans.TypeMismatchException: Failed to convert property value of type 'java.lang.String' to required type 'int' for property 'port'; nested exception is java.lang.NumberFormatException: For input string: "${email.port}"
    at org.springframework.beans.BeanWrapperImpl.convertIfNecessary(BeanWrapperImpl.java:479)
    at org.springframework.beans.BeanWrapperImpl.convertForProperty(BeanWrapperImpl.java:511)
    at org.springframework.beans.BeanWrapperImpl.convertForProperty(BeanWrapperImpl.java:505)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.convertForProperty(AbstractAutowireCapableBeanFactory.java:1502)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1461)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1197)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:537)
    ... 20 more
Caused by: java.lang.NumberFormatException: For input string: "${email.port}"
    at java.lang.NumberFormatException.forInputString(NumberFormatException.java:65)
    at java.lang.Integer.parseInt(Integer.java:569)
    at java.lang.Integer.valueOf(Integer.java:766)
    at org.springframework.util.NumberUtils.parseNumber(NumberUtils.java:155)
    at org.springframework.beans.propertyeditors.CustomNumberEditor.setAsText(CustomNumberEditor.java:113)
    at org.springframework.beans.TypeConverterDelegate.doConvertTextValue(TypeConverterDelegate.java:430)
    at org.springframework.beans.TypeConverterDelegate.doConvertValue(TypeConverterDelegate.java:403)
    at org.springframework.beans.TypeConverterDelegate.convertIfNecessary(TypeConverterDelegate.java:181)
    at org.springframework.beans.BeanWrapperImpl.convertIfNecessary(BeanWrapperImpl.java:459)
    ... 26 more

Jun 15, 2015 10:46:17 AM org.apache.catalina.core.StandardContext listenerStart
SEVERE: Exception sending context initialized event to listener instance of class kh.com.gfam.rsos.listener.InitializeApplicationListner
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'mailSender' defined in class path resource [springConfig.xml]: Initialization of bean failed; nested exception is org.springframework.beans.TypeMismatchException: Failed to convert property value of type 'java.lang.String' to required type 'int' for property 'port'; nested exception is java.lang.NumberFormatException: For input string: "${email.port}"
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:547)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:475)
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:304)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:300)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:195)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:700)
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:760)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:482)
    at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:403)
    at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:306)
    at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:106)
    at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4751)
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5175)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1408)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1398)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)
Caused by: org.springframework.beans.TypeMismatchException: Failed to convert property value of type 'java.lang.String' to required type 'int' for property 'port'; nested exception is java.lang.NumberFormatException: For input string: "${email.port}"
    at org.springframework.beans.BeanWrapperImpl.convertIfNecessary(BeanWrapperImpl.java:479)
    at org.springframework.beans.BeanWrapperImpl.convertForProperty(BeanWrapperImpl.java:511)
    at org.springframework.beans.BeanWrapperImpl.convertForProperty(BeanWrapperImpl.java:505)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.convertForProperty(AbstractAutowireCapableBeanFactory.java:1502)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1461)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1197)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:537)
    ... 20 more
Caused by: java.lang.NumberFormatException: For input string: "${email.port}"
    at java.lang.NumberFormatException.forInputString(NumberFormatException.java:65)
    at java.lang.Integer.parseInt(Integer.java:569)
    at java.lang.Integer.valueOf(Integer.java:766)
    at org.springframework.util.NumberUtils.parseNumber(NumberUtils.java:155)
    at org.springframework.beans.propertyeditors.CustomNumberEditor.setAsText(CustomNumberEditor.java:113)
    at org.springframework.beans.TypeConverterDelegate.doConvertTextValue(TypeConverterDelegate.java:430)
    at org.springframework.beans.TypeConverterDelegate.doConvertValue(TypeConverterDelegate.java:403)
    at org.springframework.beans.TypeConverterDelegate.convertIfNecessary(TypeConverterDelegate.java:181)
    at org.springframework.beans.BeanWrapperImpl.convertIfNecessary(BeanWrapperImpl.java:459)
    ... 26 more

Jun 15, 2015 10:46:17 AM org.apache.catalina.core.ApplicationContext log
INFO: Set web app root system property: 'webapp.root' = [D:\Sample Project 2 (RSOS)\.metadata\.plugins\org.eclipse.wst.server.core\tmp0\wtpwebapps\rsos]
Jun 15, 2015 10:46:17 AM org.apache.catalina.core.ApplicationContext log
INFO: Initializing log4j from [D:\Sample Project 2 (RSOS)\.metadata\.plugins\org.eclipse.wst.server.core\tmp0\wtpwebapps\rsos\WEB-INF\resources\log4j.xml]
log4j:ERROR Could not parse url [file:/D:/Sample%20Project%202%20(RSOS)/.metadata/.plugins/org.eclipse.wst.server.core/tmp0/wtpwebapps/rsos/WEB-INF/resources/log4j.xml].
java.io.FileNotFoundException: D:\Sample Project 2 (RSOS)\.metadata\.plugins\org.eclipse.wst.server.core\tmp0\wtpwebapps\rsos\WEB-INF\resources\log4j.xml (The system cannot find the path specified)
    at java.io.FileInputStream.open(Native Method)
    at java.io.FileInputStream.<init>(FileInputStream.java:131)
    at java.io.FileInputStream.<init>(FileInputStream.java:87)
    at sun.net.www.protocol.file.FileURLConnection.connect(FileURLConnection.java:90)
    at sun.net.www.protocol.file.FileURLConnection.getInputStream(FileURLConnection.java:188)
    at org.apache.log4j.xml.DOMConfigurator$2.parse(DOMConfigurator.java:765)
    at org.apache.log4j.xml.DOMConfigurator.doConfigure(DOMConfigurator.java:871)
    at org.apache.log4j.xml.DOMConfigurator.doConfigure(DOMConfigurator.java:778)
    at org.apache.log4j.xml.DOMConfigurator.configure(DOMConfigurator.java:906)
    at org.springframework.util.Log4jConfigurer.initLogging(Log4jConfigurer.java:69)
    at org.springframework.web.util.Log4jWebConfigurer.initLogging(Log4jWebConfigurer.java:152)
    at org.springframework.web.util.Log4jConfigListener.contextInitialized(Log4jConfigListener.java:46)
    at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4751)
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5175)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1408)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1398)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)

Answer 1

查看堆栈跟踪的这一行：

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'mailSender' defined in class path resource [springConfig.xml]: Initialization of bean failed; nested exception is org.springframework.beans.TypeMismatchException: Failed to convert property value of type 'java.lang.String' to required type 'int' for property 'port'; nested exception is java.lang.NumberFormatException: For input string: "${email.port}"

它表示您的变量port必须是int，并且您尝试将其存储为String，因此您必须将其设置为：

<property name="port">${email.port}</property>

我希望它会对你有所帮助！

Answer 2

我认为您必须尝试这样。在类路径上创建属性文件，然后提供对application-context.xml的引用。

<!-- App Properties -->
<beans:bean id="propertyConfigurer"
    class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
    <property name="properties" ref="appProperties" />
</beans:bean>

<bean id="appProperties"
    class="org.springframework.beans.factory.config.PropertiesFactoryBean">
    <property name="singleton" value="true" />
    <property name="ignoreResourceNotFound" value="true" />
    <property name="locations">
        <!-- Note: Properties defined in later files will override properties 
            defined earlier files, in case of overlapping keys. Hence, make sure that 
            the most specific files are the last ones in the given list of locations. -->
        <list>
            <value>classpath:properties/email.properties</value>
        </list>
    </property>
</bean>
<!-- App Properties End -->

希望以上配置可以帮助你。:)让我知道任何查询。

Answer 3

我认为您尚未在spring配置xml文件中声明property placeholder。

<bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">

        <property name="location">
            <value>email.properties</value> //location of email.properties file
        </property>
</bean>

如果您正在使用Spring 3.1或更高版本，请提供

<context:property-placeholder location="classpath:email.properties" />

email.properties文件应放在/ src / main / resources下，以便在运行时在类路径中可用。

This is a nice article on property configuration

Answer 4

您忘记了如上所述设置PropertyPlaceholderConfigurer。您的属性文件似乎位于类路径（资源文件夹）中，因此只需添加＆＃34; classpath：＆＃34; - ＆＃34; classpath：email.properties＆＃34;。