我尝试使用 util-constant 进行 ioc,但收到以下错误消息:
cvc-complex-type.2.4.c: The matching wildcard is strict, but no declaration can be found for element 'util:constant'.
所有 spring 3.1.1 dist jar 都在我的类路径中,并且在进行包括使用 util:constant 标记的更改之前,我能够成功运行我的程序。
这是我的 ioc xml 文件:
<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"
xmlns:tool="http://www.springframework.org/schema/tool"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-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>
这是正确的声明util
命名空间(不要忘记指定schemaLocation
):
<?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">
</beans>
更多信息请访问C.2.2 util 模式 http://static.springsource.org/spring/docs/current/spring-framework-reference/html/xsd-config.html#xsd-config-body-schemas-util.
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