<!--构造器注入 -->   <bean id="user1" class="cn.happy.entity.User">      <constructor-arg index="0" type="java.lang.String" value="http://www.mamicode.com/lxl"></constructor-arg>      <constructor-arg index="1" type="java.lang.String" value="http://www.mamicode.com/lxl@163.com"></constructor-arg>   </bean>

Test：
ApplicationContext ctx = new ClassPathXmlApplicationContext("applicationContext.xml");        User user=(User)ctx.getBean("user1");        System.out.println(user.getEmail());

<!-- set方法注入 -->   <bean id="user2" class="cn.happy.entity.User">      <!-- 使用property -->      <property name="username" value="http://www.mamicode.com/张靓颖"></property>   </bean>