因为想在controller以外的类里使用bean，所以在网上找了个实现ApplicationContextAware接口的类，如下
public class SpringContextUtil implements ApplicationContextAware {
private static ApplicationContext applicationContext; // Spring应用上下文环境
// 下面的这个方法上加了@Override注解，原因是继承ApplicationContextAware接口是必须实现的方法
@Override
public void setApplicationContext(ApplicationContext applicationContext)
throws BeansException {
SpringContextUtil.applicationContext = applicationContext;
}
public static ApplicationContext getApplicationContext() {
return applicationContext;
}
public static Object getBean(String name) throws BeansException {
return applicationContext.getBean(name);
}
@SuppressWarnings("unchecked")
public static Object getBean(String name, Class requiredType)
throws BeansException {
return applicationContext.getBean(name, requiredType);
}
public static boolean containsBean(String name) {
return applicationContext.containsBean(name);
}
public static boolean isSingleton(String name) throws NoSuchBeanDefinitionException {
return applicationContext.isSingleton(name);
}
public static Class getType(String name) throws NoSuchBeanDefinitionException {
return applicationContext.getType(name);
}
public static String[] getAliases(String name) throws NoSuchBeanDefinitionException {
return applicationContext.getAliases(name);
}
}并在datasource.xml中加入了bean：
<bean id="SpringContextUtil" class="com.streetLight.util.SpringContextUtil" scope="singleton"/>
但网上的那个文章没有介绍具体要怎么做，只是说在要引用bean的类里面添加以下代码，即可：
ConcentratorService concentratorService =(ConcentratorService) SpringContextUtil.getBean("concentratorService");但是出来了NULLPOINTER的运行错误，大概是因为先要用setApplicationContext布置一下context，所以我在代码前面加了以下代码：
SpringContextUtil scu=new SpringContextUtil();
scu.setApplicationContext(new FileSystemXmlApplicationContext("/WebRoot/WEB-INF/config/datasource.xml"));但是这次又出现了一些运行错误：
Exception in thread "main" org.springframework.beans.factory.xml.XmlBeanDefinitionStoreException: Line 8 in XML document from file [/Users/apple/Documents/Eclipse/workspace/streetLight/WebRoot/WEB-INF/config/datasource.xml] is invalid; nested exception is org.xml.sax.SAXParseException; lineNumber: 8; columnNumber: 74; cvc-elt.1: 找不到元素 'beans' 的声明。 at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.doLoadBeanDefinitions(XmlBeanDefinitionReader.java:398) at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:335) at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:303) at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:180) at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:216) at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:187) at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:251) at org.springframework.context.support.AbstractXmlApplicationContext.loadBeanDefinitions(AbstractXmlApplicationContext.java:127) at org.apache.xbean.spring.context.FileSystemXmlApplicationContext.loadBeanDefinitions(FileSystemXmlApplicationContext.java:168) at org.springframework.context.support.AbstractRefreshableApplicationContext.refreshBeanFactory(AbstractRefreshableApplicationContext.java:129) at org.springframework.context.support.AbstractApplicationContext.obtainFreshBeanFactory(AbstractApplicationContext.java:540) at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:454) at org.apache.xbean.spring.context.FileSystemXmlApplicationContext.<init>(FileSystemXmlApplicationContext.java:149) at org.apache.xbean.spring.context.FileSystemXmlApplicationContext.<init>(FileSystemXmlApplicationContext.java:48) at com.streetLight.util.ReceiveThread.init(ReceiveThread.java:46) at websocket.runSocket.main(runSocket.java:26) Caused by: org.xml.sax.SAXParseException; lineNumber: 8; columnNumber: 74; cvc-elt.1: 找不到元素 'beans' 的声明。 at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.createSAXParseException(ErrorHandlerWrapper.java:198) at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.error(ErrorHandlerWrapper.java:134) at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:437) at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:368) at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:325) at com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaValidator.handleStartElement(XMLSchemaValidator.java:1906) at com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaValidator.startElement(XMLSchemaValidator.java:746) at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.scanStartElement(XMLNSDocumentScannerImpl.java:379) at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl$NSContentDriver.scanRootElementHook(XMLNSDocumentScannerImpl.java:605) at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(XMLDocumentFragmentScannerImpl.java:3138) at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$PrologDriver.next(XMLDocumentScannerImpl.java:880) at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:606) at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.next(XMLNSDocumentScannerImpl.java:117) at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:510) at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:848) at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:777) at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:141) at com.sun.org.apache.xerces.internal.parsers.DOMParser.parse(DOMParser.java:243) at com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderImpl.parse(DocumentBuilderImpl.java:347) at org.springframework.beans.factory.xml.DefaultDocumentLoader.loadDocument(DefaultDocumentLoader.java:76) at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.doLoadDocument(XmlBeanDefinitionReader.java:428) at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.doLoadBeanDefinitions(XmlBeanDefinitionReader.java:390) ... 15 more
之后我在网上找了一下，说是datasource.xml文件里面的xsd文件未能被找到。以下是该xml文件的部分代码：
<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" xmlns:util="http://www.springframework.org/schema/util" xmlns:mvc="http://www.springframework.org/schema/mvc" xsi:schemaLocation="http://www.springframework.org/schema/mvc spring-mvc-3.2.xsd http://www.springframework.org/schema/beans spring-beans-4.2.xsd http://www.springframework.org/schema/util spring-util-3.2.xsd http://www.springframework.org/schema/context spring-context-4.2.xsd"> ... </beans>
的确，http://www.springframework.org/schema/beans spring-beans-4.2.xsd地址要改成http://www.springframework.org/schema/context/spring-context-4.2.xsd才能在网页上被查找出来，但之后发现这个格式是没有错的，改了反而在工程被运行时产生错误。
搞了好几个小时真的不知道是哪里出了问题了，所以来请教各位仁兄～先谢过～～
我自己解决了。。。。datasource.xml要改成以下方式：
<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" xmlns:util="http://www.springframework.org/schema/util" xmlns:mvc="http://www.springframework.org/schema/mvc" xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.2.xsd http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-3.2.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.2.xsd">
要怎样才能使用本地的xsd啊＝ ＝。。。
三叔2016-10-27 13:49:29
其实可以不用用到这个工具类，在需要getBean的类注入一个ApplicationContext即可。
@Autowired
private ApplicationContext context;
...
context.getBean("bean name");