Question

spring中怎么通过构造方法注解给一个对象注入对象？？

比如 public class MyService(){
@Resouce(name="dao")
public MyDao dao ;
//这里怎么通过注解注入
public MyService(MyDao dao){

}

}

Answer 1

#MyService.java
public class MyService(){
public MyDao dao ;
public MyService(MyDao dao){
super();
this.dao=dao;
}
}
#beans.xml
<bean id="dao" class="com.xx.xx.Mydao">
<bean id="MyService" class="com.xx.xx.MyService">
<constructor-arg><bean="dao"/></constructor-arg>
</bean>

追问

//这里怎么通过注解注入 能用注解指定么 不在xml配置
public MyService(MyDao dao){

}

Answer 2

@Autowired
public MyService(MyDao dao){

}