我正在尝试对 ioc 使用 util:constant 标记,但收到以下错误消息:
线程“主”org.springframework.beans.factory.BeanDefinitionStoreException 中的异常:在类路径资源 [spring.xml] 中定义名称为“threadPoolExecutor”的 bean 注册时出错:未知属性子元素:<util:constant>
这是我的xml:
<?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:util="http://www.springframework.org/schema/util"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd
http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-3.1.xsd">
<bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="locations">
<value>classpath:config.properties</value>
</property>
</bean>
<bean id="main" class="pikefin.Main">
<property name="executorSample" ref="executorSample"/>
</bean>
<bean id="executorSample" class="pikefin.ExecutorSample">
<constructor-arg ref="threadPoolExecutor" />
</bean>
<bean id="threadPoolExecutor" class="java.util.concurrent.ThreadPoolExecutor">
<constructor-arg index="0" value="2"/>
<constructor-arg index="1" value="2"/>
<constructor-arg index="2" value="10"/>
<constructor-arg index="3"><util:constant static-field="java.util.concurrent.TimeUnit.SECONDS"/></constructor-arg>
<constructor-arg index="4" ref="arrayBlockingPool"/>
</bean>
<bean id="arrayBlockingPool" class="java.util.concurrent.ArrayBlockingQueue">
<constructor-arg value="5"/>
</bean>
</beans>
更新:
这是我添加了标签的 xml,<value>
它会导致不同的错误消息:
发现以元素“util:constant”开头的无效内容。此时不需要子元素。
(旁注:由于某种原因,我的格式控件在 SO 中发布时消失了)
<?xml 版本="1.0" 编码="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:util="http://www.springframework.org/schema/util" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-3.1.xsd"> <bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"> <属性名称="位置"> <value>类路径:config.properties</value> </属性> </豆> <bean id="main" class="pikefin.Main"> <property name="executorSample" ref="executorSample"/> </豆> <bean id="executorSample" class="pikefin.ExecutorSample"> <constructor-arg ref="threadPoolExecutor" /> </豆> <bean id="threadPoolExecutor" class="java.util.concurrent.ThreadPoolExecutor"> <constructor-arg index="0" value="2"/> <constructor-arg index="1" value="2"/> <constructor-arg index="2" value="10"/> <constructor-arg index="3"> <值> <util:constant static-field="java.util.concurrent.TimeUnit.SECONDS"/> </值> </constructor-arg> <constructor-arg index="4" ref="arrayBlockingPool"/> </豆> <bean id="arrayBlockingPool" class="java.util.concurrent.ArrayBlockingQueue"> <constructor-arg value="5"/> </豆> </beans>