package com.etc.pojo;import org.springframework.context.ApplicationContext;import org.springframework.context.support.ClassPathXmlApplicationContext;public class SpUtil { static private ApplicationContext ac; static { ac = new ClassPathXmlApplicationContext("applicationContext.xml"); } private SpUtil() { } public static ApplicationContext getAc() { return ac; } }

package com.etc.test;import org.junit.Test;import org.springframework.context.ApplicationContext;import com.etc.pojo.SpUtil;public class TestDemo { @Test public void test05() { //实现方式四 单例模式 ApplicationContext ac = SpUtil.getAc(); System.out.println(ac.getBean("person")); }}