Spring4 入门案例 XML

1 创建web项目

2 引入spring的jar包，并build Path

3 创建配置文件applicationContext.xml

   3.1 去 spring-framework-4.2.4.RELEASE-dist/spring-framework-4.2.4.RELEASE/docs/spring-framework-reference/html/xsd-configuration.html里面找到约束并在applicationContext.xml中引入beans的约束40.2.1 Referencing the schemas

 

<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="
        http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
</beans>

   3.2 配置将类交给Spring管理

   <bean id="UserDao" class="com.spring.demo1.UserDapImpl"></bean>

4 编写测试类

@Test
    //Spring方式的调用
    public void demo2() {
        // 创建Spring的工厂
        ApplicationContext applicationContext = new ClassPathXmlApplicationContext("applicationContext.xml");
        UserDao userDao = (UserDao) applicationContext.getBean("UserDao");
        userDao.save();    
    }