Spring-Bean创建对象的步骤方式详解

<bean id="user" class="com.c.pojo.user"> 
<constructor-arg index= 0 value=" ">
</bean>

<bean id="user" class="com.c.pojo.user">
<constructor-arg type="java.lang.String " value=" ">
</bean>

<bean id="user" class="com.c.pojo.user">
<constructor-arg name="name" value="123"/> //name 变量名
</bean>

//工厂类实现指定接口并且实现接口中的三个抽象方法:
public class ConnectionFactory implements FactoryBean<Connection>{
private String driver;
private String url;
private String username;
private String password;

@Override
public Connection getObject() throws Exception {
Class.forName(driver);
Connection conn = 
DriverManager.getConnection(url,username,password);
return conn;
}

@Override
public boolean isSingleton() {
return false;
}

@Override
public Class<Connection> getObjectType() {
return Connection.class;
}
set/get
....
}