1.程序中有Junit环境
　　2.导入一个jar包.spring与junit整合jar包
　　spring-test-3.2.0.RELEASE.jar
　　3.测试代码
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations="classpath:applicationContext.xml")
public class SpringTest {
@Autowired
private UserService userService;
@Test
public void demo1(){
userService.sayHello();
}
}
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd">
<bean id="userService" class="cn.yzu.service.UserService"></bean>
</beans>