尝试在spring中保留消息属性文件列表时出错

Question

我尝试根据java脑中的教程创建Message源,我在尝试将选项设置为有多个消息属性文件时遇到了问题,产生了错误,错误在下面给出

Exception in thread "main" org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'messageSource' defined in class path resource [spring.xml]: Initialization of bean failed; nested exception is org.springframework.beans.ConversionNotSupportedException: Failed to convert property value of type 'java.util.ArrayList' to required type 'java.lang.String' for property 'basename'; nested exception is java.lang.IllegalStateException: Cannot convert value of type [java.util.ArrayList] to required type [java.lang.String] for property 'basename': no matching editors or conversion strategy found
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:527)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:293)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:290)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:196)
at org.springframework.context.support.AbstractApplicationContext.initMessageSource(AbstractApplicationContext.java:755)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:413)
at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:139)
at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:83)
at test.app.main(app.java:20)
Caused by: org.springframework.beans.ConversionNotSupportedException: Failed to convert property value of type 'java.util.ArrayList' to required type 'java.lang.String' for property 'basename'; nested exception is java.lang.IllegalStateException: Cannot convert value of type [java.util.ArrayList] to required type [java.lang.String] for property 'basename': no matching editors or conversion strategy found
at org.springframework.beans.BeanWrapperImpl.convertIfNecessary(BeanWrapperImpl.java:481)
at org.springframework.beans.BeanWrapperImpl.convertForProperty(BeanWrapperImpl.java:518)
at org.springframework.beans.BeanWrapperImpl.convertForProperty(BeanWrapperImpl.java:512)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.convertForProperty(AbstractAutowireCapableBeanFactory.java:1371)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1330)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1086)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:517)
... 10 more
Caused by: java.lang.IllegalStateException: Cannot convert value of type [java.util.ArrayList] to required type [java.lang.String] for property 'basename': no matching editors or conversion strategy found
at org.springframework.beans.TypeConverterDelegate.convertIfNecessary(TypeConverterDelegate.java:233)
at org.springframework.beans.BeanWrapperImpl.convertIfNecessary(BeanWrapperImpl.java:466)

spring.xml文件如下所示

<?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:p="http://www.springframework.org/schema/p"
   xmlns:aop="http://www.springframework.org/schema/aop"
   xmlns:tx="http://www.springframework.org/schema/tx"
   xsi:schemaLocation="http://www.springframework.org/schema/beans 
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/aop 
http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
http://www.springframework.org/schema/context 
http://www.springframework.org/schema/context/spring-context-3.0.xsd
http://www.springframework.org/schema/tx 
http://www.springframework.org/schema/tx/spring-tx-3.0.xsd"     xmlns:context="http://www.springframework.org/schema/context">

<bean id="messageSource" class="org.springframework.context.support.ResourceBundleMessageSource">
    <property name="basename">
        <list>
            <value>mymessages</value>
        </list>
    </property>
</bean>
<context:annotation-config/>
<context:component-scan base-package="test"/>

当我从上面的代码中删除list标签时,i能够毫无例外地运行.虚空主要在下面给出.

public static void main(String args[]) {

    ApplicationContext context = new ClassPathXmlApplicationContext("spring.xml");
    System.out.println(context.getMessage("greeting", null, "hiiiii", null));
}

我已经创建了一个文件mymessages.prperties,其中包含对问候语的键值对.请帮我找一下我做错了什么.

Answer 1

你正在使用<property name="basename">它应该是单一资源..但对于多个资源你应该使用<property name="basenames">..你的错误信息明确指出,不能从字符串转换为List ..你正在使用字符串类型但传递列表类型..所以使用basenames.. 希望能帮助到你...