【发布时间】：2017-11-25 16:50:45
【问题描述】：
我定义了一个类加载器并添加了我所有的库，然后我定义了一个 ApplicationContext，我尝试从外部 jar 中的一个类中获取带有 ApplicationContext 的Bean，这是我的关键代码：
ApplicationContext context = new FileSystemXmlApplicationContext(beanPath) {
@Override
protected void initBeanDefinitionReader(XmlBeanDefinitionReader reader) {
super.initBeanDefinitionReader(reader);
reader.setValidationMode(XmlBeanDefinitionReader.VALIDATION_NONE);
reader.setBeanClassLoader(classLoader);
}
};
我尝试这样获取Bean：
AswanService instance = (AswanService)context.getBean("aswanService", AswanService.class);
但问题是，如果我定义目标类的属性有setter/getter方法，实例对象可以注入这两个属性，类定义如下：
public class AswanServiceImpl implements AswanService {
SpringInjectFaker springInjectFaker;
ItemDO itemDO;
public AswanResponse request(AswanRequest aswanRequest) {
springInjectFaker.fake();
AswanResponse response = new AswanResponse();
response.setName("response: " + aswanRequest.getName() + "; " + itemDO.getItemId());
return response;
}
public SpringInjectFaker getSpringInjectFaker() {
return springInjectFaker;
}
public void setSpringInjectFaker(SpringInjectFaker springInjectFaker) {
this.springInjectFaker = springInjectFaker;
}
public ItemDO getItemDO() {
return itemDO;
}
public void setItemDO(ItemDO itemDO) {
this.itemDO = itemDO;
}
}
但如果是用自动装配注解定义的，它就不起作用：
public class AswanServiceImpl implements AswanService {
@Autowired
SpringInjectFaker springInjectFaker;
@Autowired
ItemDO itemDO;
public AswanResponse request(AswanRequest aswanRequest) {
springInjectFaker.fake();
AswanResponse response = new AswanResponse();
response.setName("response: " + aswanRequest.getName() + "; " + itemDO.getItemId());
return response;
}
}
instance = context.getBean("aswanService", AswanService.class)，instance被注入但它的两个属性itemDO和springInjectFaker都是null。
我尝试添加配置，但没有成功。
<?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:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd">
<context:annotation-config/>
<bean id="aswanService" class="com.taobao.qa.perf.tr.AswanServiceImpl" autowire="byName"></bean>
<bean id="springInjectFaker" class="com.taobao.qa.perf.tr.SpringInjectFakerImp" autowire="byName"></bean>
<bean id="itemDO" class="com.taobao.qa.perf.tr.ItemDO" autowire="byName">
<constructor-arg index="0" value="1"></constructor-arg>
<constructor-arg index="1" value="2"></constructor-arg>
</bean>
</beans>
我的项目是java项目，我在main函数中运行程序（public static void main(String[] args)），谢谢大家的帮助~~~
【问题讨论】：