普通java类获取 spring中的bean方法

编写一个工具类

 实现spring 的ApplicationContextAware接口

代码以下：

package com.evideostb.billsystem.utils;

import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.context.support.ClassPathXmlApplicationContext;

/**
 * 以静态变量保存Spring ApplicationContext, 可在任何代码任何地方任什么时候候中取出ApplicaitonContext.
 * @author zhangchuanzhao
 * 2016-6-12 上午11:04:46
 */
public class SpringContextHolder implements ApplicationContextAware {
	private static ApplicationContext applicationContext;

	/**
	 * 实现ApplicationContextAware接口的context注入函数, 将其存入静态变量.
	 */
	public void setApplicationContext(ApplicationContext applicationContext) {
		SpringContextHolder.applicationContext = applicationContext; // NOSONAR
	}

	/**
	 * 取得存储在静态变量中的ApplicationContext.
	 */
	public static ApplicationContext getApplicationContext() {
		checkApplicationContext();
		return applicationContext;
	}

	/**
	 * 从静态变量ApplicationContext中取得Bean, 自动转型为所赋值对象的类型.
	 */
	@SuppressWarnings("unchecked")
	public static <T> T getBean(String name) {
		checkApplicationContext();
		return (T) applicationContext.getBean(name);
	}

	/**
	 * 从静态变量ApplicationContext中取得Bean, 自动转型为所赋值对象的类型.
	 */
	@SuppressWarnings("unchecked")
	public static <T> T getBean(Class<T> clazz) {
		checkApplicationContext();
		return (T) applicationContext.getBeansOfType(clazz);
	}

	/**
	 * 清除applicationContext静态变量.
	 */
	public static void cleanApplicationContext() {
		applicationContext = null;
	}

	@SuppressWarnings("resource")
	private static void checkApplicationContext() {
		new ClassPathXmlApplicationContext("SpringMVC-servlet.xml");
		if (applicationContext == null) {
			throw new IllegalStateException(
					"applicationContext未注入,请在applicationContext.xml中定义SpringContextHolder");
		}
	}
}

而后须要在application中把把org.springframework.context.ApplicationContext做为属性注入给类

其实只须要这样写就能够以下：

<bean class="com.evideostb.billsystem.utils.SpringContextHolder" lazy-init="false" />

这样子就是被注入进去了

运行的时候只须要加载你的applicationContext.xml

*普通java类main方法这样调用

new ClassPathXmlApplicationContext("applicationContext.xml");

CommonService commonService = (CommonService) SpringContextHolder.getBean("commonService");

*web工程直接调用

CommonService commonService = (CommonService) SpringContextHolder.getBean("commonService");