Spring--Spring入门

dependencies>
  dependency>
    groupId>junitgroupId>
    artifactId>junitartifactId>
    version>4.11version>
    scope>testscope>
  dependency>
  dependency>
    groupId>org.springframeworkgroupId>
    artifactId>spring-coreartifactId>
    version>4.3.7.RELEASEversion>
  dependency>
  dependency>
    groupId>org.springframeworkgroupId>
    artifactId>spring-contextartifactId>
    version>4.3.7.RELEASEversion>
  dependency>
  dependency>
    groupId>org.springframeworkgroupId>
    artifactId>spring-beansartifactId>
      version>4.3.7.RELEASEversion>
  dependency>
    dependency>
        groupId>org.springframeworkgroupId>
        artifactId>spring-expressionartifactId>
      version>4.3.7.RELEASEversion>
    dependency>
  dependency>
    groupId>commons-logginggroupId>
    artifactId>commons-loggingartifactId>
    version>1.2version>
  dependency>
  dependency>
    groupId>log4jgroupId>
    artifactId>log4jartifactId>
    version>1.2.17version>
  dependency>
dependencies>

public interface UserService {

    public void sayHello();
}

public class UserServiceImpl implements  UserService{
    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    //添加属性
    private String name;
    @Override
    public void sayHello() {
        System.out.print("hello spring" + name);
    }
}

public class SpringDemo1 {
    @Test
    /**
     * 传统方式开发
     */
    public void demo1(){
        //UserService userService = new UserServiceImpl();
        UserServiceImpl userService = new UserServiceImpl();
        //设置属性 传统方法要改代码 就不好了
        userService.setName("张三");
        userService.sayHello();
    }

    @Test
    /**
     * 使用Spring 的方式
     */
    public void demo2(){
        //创建Spring的工厂
        ApplicationContext applicationContext = new ClassPathXmlApplicationContext("applicationContext.xml");
        //通过工厂获得类
        UserService userService = (UserService) applicationContext.getBean("userService");

        userService.sayHello();
    }
}

xml version="1.0" encoding="UTF-8"?>
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">

    
    bean id="userService" class="com.windbag.ioc.demo1.UserServiceImpl">

        
        property name="name" value="李四">property>
    bean>

beans>