Spring Bean定义的三种方式

<beans>
<import resource=“resource1.xml” />//导入其他配置文件Bean的定义
<import resource=“resource2.xml” />

<bean id="userService" class="cn.lovepi.***.UserService" init-method="init" destory-method="destory"> 
</bean>
<bean id="message" class="java.lang.String">
　　<constructor-arg index="0" value="test"></constructor-arg>
</bean>
</beans>

<context:component-scan base-package="com.lovepi.spring"> 
　　<context:include-filter type="regex" expression="com.lovepi.spring.*"/> 　　//包含的目标类
　　<context:exclude-filter type="aspectj" expression="cn.lovepi..*Controller+"/> 　　//排除的目标类
</context:component-scan>

@Service
public class SysUserService {

    @Resource
    private SysUserMapper sysUserMapper;

    public int insertSelective(SysUser record){
        return sysUserMapper.insertSelective(record);
    }

}

@Configuration  
public class BeansConfiguration {  

    @Bean  
    public Student student(){  
        Student student=new Student();  
        student.setName("张三");  
        student.setTeacher(teacher());  
        return student;  
    }  

    @Bean  
    public Teacher teacher(){  
        Teacher teacher=new Teacher();  
        teacher.setName("李四");  
        return teacher;  
    }  

}  

public class Main {  

    public static void main(String args[]){  
        AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext(BeansConfiguration.class);  
        Student student = (Student) context.getBean("student");
        Teacher teacher = (Teacher) context.getBean("teacher");
        System.out.println("学生的姓名：" + student.getName() + "。老师是" + student.getTeacher().getName());  
        System.out.println("老师的姓名：" + teacher.getName());  
    }  

}