spring基础-Bean的装配方式（一）基于xml的装配

public class User {
private String username;
private Integer password;
//默认构造器
 public User(){
super();
}
//构造方法注入
 public User(String username,Integer password){
super();
this.username=username;
this.password=password;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public Integer getPassword() {
return password;
}
public void setPassword(Integer password) {
this.password = password;
}
public String toString(){
return "User[username="+username+",password="+password+"]";
}

}

<!--构造注入,constructor-arg传入参数，index代表参数位置，从0开始，value传入值-->
<bean id="user1" class="cn.assemble.User">
<constructor-arg index="0" value="jack"></constructor-arg>
<constructor-arg index="1" value="1234"></constructor-arg>
</bean>
<!--实用set方式装配user实例，调用的是默认构造器-->
 <bean id="user2" class="cn.assemble.User">
<property name="username" value="tom"></property>
<property name="password" value="4321"></property>
</bean>
</beans>