手动获取spring的ApplicationContext和bean对象

ApplicationContext ac1 = WebApplicationContextUtils.getRequiredWebApplicationContext(ServletContext sc)

ApplicationContext ac2 = WebApplicationContextUtils.getWebApplicationContext(ServletContext sc)

写一个工具类类继承ApplicationObjectSupport

写一个工具类类继承WebApplicationObjectSupport

写一个工具类实现ApplicationContextAware接口

import java.util.Map;
import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;

/**
* 获取ApplicationContext和Object的工具类
* @author yzl
*
*/
@SuppressWarnings({ "rawtypes", "unchecked" })
public class SpringContextUtils implements ApplicationContextAware {
private static ApplicationContext applicationContext;

public void setApplicationContext(ApplicationContext arg0)
throws BeansException {
applicationContext = arg0;
}

/**
* 获取applicationContext对象
* @return
*/
public static ApplicationContext getApplicationContext(){
return applicationContext;
}

/**
* 根据bean的id来查找对象
* @param id
* @return
*/
public static Object getBeanById(String id){
return applicationContext.getBean(id);
}

/**
* 根据bean的class来查找对象
* @param c
* @return
*/
public static Object getBeanByClass(Class c){
return applicationContext.getBean(c);
}

/**
* 根据bean的class来查找所有的对象(包括子类)
* @param c
* @return
*/
public static Map getBeansByClass(Class c){
return applicationContext.getBeansOfType(c);
}
}

ApplicationContext ac = new FileSystemXmlApplicationContext("applicationContext.xml")

一：
String[]   path={"WebRoot/WEB-INF/applicationContext.xml","WebRoot/WEB-INF/applicationContext_task.xml"};
ApplicationContext context = new FileSystemXmlApplicationContext(path);

二：
String path="WebRoot/WEB-INF/applicationContext*.xml";
ApplicationContext context = new FileSystemXmlApplicationContext(path);

三：
ApplicationContext ctx = new FileSystemXmlApplicationContext("classpath:地址");
没有classpath的话就是从当前的工作目录