Learn Spring for Android Application Development

The @Required annotation

The @Required annotation is applied to bean property-setter functions. The bean property must be populated in the XML configuration file at configuration-time. This annotation essentially shows that the setter function must be arranged to be dependency-injected with a value at configuration-time.

Add a user model and the Main class with a bean.xml configuration file.

The content of the bean.xml configuration file is as follows:

<?xml version = "1.0" encoding = "UTF-8"?><beans xmlns="http://www.springframework.org/schema/beans"       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"       xmlns:context="http://www.springframework.org/schema/context"       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd ...