1 frijol externo
public class UserDao{
private String username;
public void SetName(String name){
this.username = name;
}
public void add(){
System.out.println("hello");
}
}
public class UserService{
private UserDao userdao;
public void setUserdao(UserDao userdao){
this.userdao = userdao;
}
}
Inyección de frijoles externos:
<bean id = "userService" class="com.glp.UserService">
<property name = "userDao" ref ="userDao"></property>
</bean>
<bean id = "userDao" class="com.glp.UserDao"></bean>
2 frijoles internos
Inyección de Bean interno:
<bean id = "userService" class="com.glp.UserService">
<property name = "userDao">
<bean id = "userDao" class="com.glp.UserDao">
<property name = "username" value="glp"></property>
</bean>
</property>
</bean>
3 Asignación en cascada
Es algo diferente del Bean externo: cuando se introduce el Bean externo, los atributos se establecen para el Bean externo.
<bean id = "userService" class="com.glp.UserService">
<property name = "userDao" ref="userDao"></property>
</bean>
<bean id = "userDao" class="com.glp.UserDao">
<property name = "username" value="glp"></property>
</bean>