依赖注入的三种步骤（转）

依赖注入的三种方法（转）
1.使用构造器

 private PersonDao personDao; private String name;  public PersonServiceImpl(PersonDao personDao,String name){  this.personDao = personDao;  this.name = name; }

<constructor-arg index="0" type="com.hx.springdemo01.dao.PersonDao" ref="personDao"/><constructor-arg index="1" value="stupit"/>

public class UpperAction implements Action{private String message;public String getMessage(){return message;}public void setMessage(String string){message = string;}}

<bean id="theUpperAction" name="code"><bean id="personDao" name="code">@Resource(name="personDao") private PersonDao personDao;.

@Resource public void setPersonDao(PersonDao personDao) {  this.personDao = personDao; }