创建spring容器

package com.alibaba.itbu.billing.framework.util;import org.springframework.beans.factory.NoSuchBeanDefinitionException;import org.springframework.context.ApplicationContext;import org.springframework.context.support.ClassPathXmlApplicationContext;import org.springframework.core.io.Resource;import org.springframework.core.io.support.PathMatchingResourcePatternResolver;public class ServiceUtil {private static final String filePath = "classpath*:bean/applicationContext.xml";public static ApplicationContext ctx;public static void setCtx(ApplicationContext webCtx) {ServiceUtil.ctx = webCtx;}/** * 如果不是加载默认的applicationContext.xml，请先加载自定义文件，eg："classpath*:bean/applicationContext-define.xml" * @param filePath */public static void setCtx(String filePath){    ApplicationContext context = null;            try{                PathMatchingResourcePatternResolver prp = new PathMatchingResourcePatternResolver();                Resource[] platformResources = prp.getResources(filePath);                if(platformResources.length>0){                    context = new ClassPathXmlApplicationContext(platformResources[0].getURL().toString());                   }                                    }catch(Exception e){                e.printStackTrace();                context = null;            }    ServiceUtil.ctx = context;}@SuppressWarnings("unchecked")    public static <T> T getService(Class<T> businessInterface, String serviceName){    ApplicationContext ctx = getCtx();    if(ctx==null){        return null;    }    Object bean=null;    try{        bean = ctx.getBean(serviceName);    }catch (NoSuchBeanDefinitionException e){        return null;    }    return (T) bean;}public static ApplicationContext getCtx() {    if(ctx==null){            try{                PathMatchingResourcePatternResolver prp = new PathMatchingResourcePatternResolver();                Resource[] platformResources = prp.getResources(filePath);                if(platformResources.length>0){                    ctx = new ClassPathXmlApplicationContext(platformResources[0].getURL().toString());                   }                                    }catch(Exception e){                e.printStackTrace();                ctx = null;            }        }        return ctx;}}