Spring注入方式二：构造器注入

我们也可以把用含参构造器来注入依赖对象

public class PersonSerivceBean implements PersonService {private PersonDAOl _personDAO;private String _name;public PersonSericeBean(PersonDAO personDAO, String name) {_personDAO = personDAO;_name = name;}}

配置文件

<bean id = "personDAO" class = "com.web.resource.PersonDAOImpl"><bean id = "personService" class = "com.web.service.PersonServiceImpl">    <construt_arg index = 0 type ="com.web.resource.PersonDAO" refer = "personDAO"/>    <construt_arg index = 1 value = "frank"/></bean>