我定义了一个类加载器并添加了我的所有库，然后我定义了一个ApplicationContext，我尝试使用ApplicationContext从外部jar中的类中获取getBean，这里是我的密钥代码：
ApplicationContext context = new FileSystemXmlApplicationContext(beanPath) {
@Override
protected void initBeanDefinitionReader(XmlBeanDefinitionReader reader) {
super.initBeanDefinitionReader(reader);
reader.setValidationMode(XmlBeanDefinitionReader.VALIDATION_NONE);
reader.setBeanClassLoader(classLoader);
}
};
我试着像这样getBean：
AswanService instance = (AswanService)context.getBean("aswanService", AswanService.class);
但问题是，如果我定义了哪个属性具有setter / getter方法的目标类，则可以使用两个属性注入实例对象，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;
}
}
但如果使用自动装配的注释定义它，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（＆＃34; aswanService＆＃34;，AswanService.class），实例被注入，但它的两个属性itemDO和springInjectFaker都是null。
我尝试添加配置，但没有工作。
<?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）），谢谢你的帮助~~~
答案 0 :(得分：1)
我明白了。
添加或两者都可以。
我遇到一个问题，当我添加上面的任何配置时，ide抛出异常：
org.springframework.beans.factory.BeanDefinitionStoreException: Parser configuration exception parsing XML from URL [file:xxxxxxx/beans.xml]; nested exception is javax.xml.parsers.ParserConfigurationException: Unable to validate using XSD: Your JAXP provider [org.apache.xerces.jaxp.DocumentBuilderFactoryImpl@1d89c040] does not support XML Schema. Are you running on Java 1.4 with Apache Crimson? Upgrade to Apache Xerces (or Java 1.5) for full XSD support.
at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.doLoadBeanDefinitions(XmlBeanDefinitionReader.java:404)
at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:334)
at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:302)
at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:174)
at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:209)
at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:180)
at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:243)
at org.springframework.context.support.AbstractXmlApplicationContext.loadBeanDefinitions(AbstractXmlApplicationContext.java:127)
at org.springframework.context.support.AbstractXmlApplicationContext.loadBeanDefinitions(AbstractXmlApplicationContext.java:93)
at org.springframework.context.support.AbstractRefreshableApplicationContext.refreshBeanFactory(AbstractRefreshableApplicationContext.java:130)
at org.springframework.context.support.AbstractApplicationContext.obtainFreshBeanFactory(AbstractApplicationContext.java:537)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:451)
at org.springframework.context.support.FileSystemXmlApplicationContext.<init>(FileSystemXmlApplicationContext.java:140)
at org.springframework.context.support.FileSystemXmlApplicationContext.<init>(FileSystemXmlApplicationContext.java:84)
at com.alibaba.middleware.Application$2.<init>(Application.java:159)
at com.alibaba.middleware.Application.main(Application.java:159)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:140)
Caused by: javax.xml.parsers.ParserConfigurationException: Unable to validate using XSD: Your JAXP provider [org.apache.xerces.jaxp.DocumentBuilderFactoryImpl@1d89c040] does not support XML Schema. Are you running on Java 1.4 with Apache Crimson? Upgrade to Apache Xerces (or Java 1.5) for full XSD support.
at org.springframework.beans.factory.xml.DefaultDocumentLoader.createDocumentBuilderFactory(DefaultDocumentLoader.java:102)
at org.springframework.beans.factory.xml.DefaultDocumentLoader.loadDocument(DefaultDocumentLoader.java:70)
at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.doLoadBeanDefinitions(XmlBeanDefinitionReader.java:388)
... 20 more
Caused by: java.lang.IllegalArgumentException: No attributes are implemented
at org.apache.xerces.jaxp.DocumentBuilderFactoryImpl.setAttribute(DocumentBuilderFactoryImpl.java:93)
at org.springframework.beans.factory.xml.DefaultDocumentLoader.createDocumentBuilderFactory(DefaultDocumentLoader.java:99)
... 22 more
所以我放弃了，我只是再次尝试，直到我发现在VM选项中添加两个args可以解决这个异常，我的问题也解决了。我不知道为什么，我还在学习。
-Djavax.xml.parsers.DocumentBuilderFactory=com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderFactoryImpl
-Djavax.xml.parsers.SAXParserFactory=com.sun.org.apache.xerces.internal.jaxp.SAXParserFactoryImpl
非常感谢。
答案 1 :(得分：0)
请将<context:component-scan base-package="com.taobao.qa" />添加到您的配置
答案 2 :(得分：0)
mvc：annotation-driven 用于使用其默认配置启用Spring MVC组件。
如果您不包含mvc：annotation-driven，如果您使用上下文：component-scan 来创建bean或在XML文件中定义bean，那么您的MVC应用程序也会起作用
spring配置文件中的context：component-scan 元素将不再需要声明XML文件中的所有bean。请查看spring配置文件中的以下声明：
<context:component-scan base-package="org.controller"/>
spring应用程序配置文件中的上述声明将扫描指定包中的类并创建beans实例。请注意，只有在使用正确的注释对该类进行批注时，它才能创建bean。以下是此元素扫描的注释：