國際慣例  helloWorld奉上

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.ruge</groupId>
  <artifactId>spring</artifactId>
  <packaging>war</packaging>
  <version>1.0-SNAPSHOT</version>
  <name>spring Maven Webapp</name>
  <url>http://maven.apache.org</url>
  <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>3.8.1</version>
      <scope>test</scope>
    </dependency>
    <!-- https://mvnrepository.com/artifact/commons-logging/commons-logging -->
    <dependency>
      <groupId>commons-logging</groupId>
      <artifactId>commons-logging</artifactId>
      <version>1.2</version>
    </dependency>
   <!--這個jar檔案是所有應用都要用到的，它包含訪問配置檔案、建立和管理bean以及進行
   Inversion of Control / Dependency Injection（IoC/DI）操作相關的所有類。如果應用只需基本的IoC/DI支援，
   引入spring-core.jar及spring-beans.jar檔案就可以了。-->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-beans</artifactId>
      <version>5.0.0.RELEASE</version>
    </dependency>
    <!--這個jar檔案為Spring核心提供了大量擴充套件。可以找到使用Spring ApplicationContext特性時所需的全部類，
    JDNI所需的全部類，UI方面的用來與模板（Templating）引擎如Velocity、FreeMarker、JasperReports整合的類，
    以及校驗Validation方面的相關類。 -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-context</artifactId>
      <version>5.0.0.RELEASE</version>
    </dependency>
    <!--這個jar檔案包含Spring框架基本的核心工具類，Spring其它元件要都要使用到這個包裡的類，是其它元件的基本核心-->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-core</artifactId>
      <version>5.0.0.RELEASE</version>
    </dependency>
    <!-- Spring Expression Language(SpEL) -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-expression</artifactId>
      <version>5.0.0.RELEASE</version>
    </dependency>

  </dependencies>
  <build>
    <finalName>spring</finalName>
  </build>
</project>
 

package com.ruge.test;

/**
 * 描述:
 * spring的helloworld
 *
 * @outhor 愛麗絲、如歌
 * @create 2017-11-01 20:50
 */
public class HelloWorld {
    private String name;

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }
    public void hello(){
        System.out.println("hello:"+name);
    }
}
 

package com.ruge.test;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

/**
 * 描述:
 * main測試類
 *
 * @outhor 愛麗絲、如歌
 * @create 2017-11-01 20:52
 */
public class test {
    public static void main(String[] args) {
        HelloWorld helloWorld = new HelloWorld();
        helloWorld.setName("愛麗絲、如歌");
        //呼叫方法
        helloWorld.hello();
    }
}
 

D:\download\tool\jdk\jdk8_64\install\bin\java -Didea.launcher.port=7532 -Didea.launcher.bin.path=D:\download\tool\ide\idea\2016\ideaIU-2016\install\bin -Dfile.encoding=UTF-8 -classpath D:\download\tool\jdk\jdk8_64\install\jre\lib\charsets.jar;D:\download\tool\jdk\jdk8_64\install\jre\lib\deploy.jar;D:\download\tool\jdk\jdk8_64\install\jre\lib\ext\access-bridge-64.jar;D:\download\tool\jdk\jdk8_64\install\jre\lib\ext\cldrdata.jar;D:\download\tool\jdk\jdk8_64\install\jre\lib\ext\dnsns.jar;D:\download\tool\jdk\jdk8_64\install\jre\lib\ext\jaccess.jar;D:\download\tool\jdk\jdk8_64\install\jre\lib\ext\jfxrt.jar;D:\download\tool\jdk\jdk8_64\install\jre\lib\ext\localedata.jar;D:\download\tool\jdk\jdk8_64\install\jre\lib\ext\nashorn.jar;D:\download\tool\jdk\jdk8_64\install\jre\lib\ext\sunec.jar;D:\download\tool\jdk\jdk8_64\install\jre\lib\ext\sunjce_provider.jar;D:\download\tool\jdk\jdk8_64\install\jre\lib\ext\sunmscapi.jar;D:\download\tool\jdk\jdk8_64\install\jre\lib\ext\sunpkcs11.jar;D:\download\tool\jdk\jdk8_64\install\jre\lib\ext\zipfs.jar;D:\download\tool\jdk\jdk8_64\install\jre\lib\javaws.jar;D:\download\tool\jdk\jdk8_64\install\jre\lib\jce.jar;D:\download\tool\jdk\jdk8_64\install\jre\lib\jfr.jar;D:\download\tool\jdk\jdk8_64\install\jre\lib\jfxswt.jar;D:\download\tool\jdk\jdk8_64\install\jre\lib\jsse.jar;D:\download\tool\jdk\jdk8_64\install\jre\lib\management-agent.jar;D:\download\tool\jdk\jdk8_64\install\jre\lib\plugin.jar;D:\download\tool\jdk\jdk8_64\install\jre\lib\resources.jar;D:\download\tool\jdk\jdk8_64\install\jre\lib\rt.jar;D:\project_idea\spring\target\classes;D:\download\tool\versionControl\maven\localRepository\commons-logging\commons-logging\1.2\commons-logging-1.2.jar;D:\download\tool\versionControl\maven\localRepository\org\springframework\spring-beans\5.0.0.RELEASE\spring-beans-5.0.0.RELEASE.jar;D:\download\tool\versionControl\maven\localRepository\org\springframework\spring-context\5.0.0.RELEASE\spring-context-5.0.0.RELEASE.jar;D:\download\tool\versionControl\maven\localRepository\org\springframework\spring-aop\5.0.0.RELEASE\spring-aop-5.0.0.RELEASE.jar;D:\download\tool\versionControl\maven\localRepository\org\springframework\spring-core\5.0.0.RELEASE\spring-core-5.0.0.RELEASE.jar;D:\download\tool\versionControl\maven\localRepository\org\springframework\spring-jcl\5.0.0.RELEASE\spring-jcl-5.0.0.RELEASE.jar;D:\download\tool\versionControl\maven\localRepository\org\springframework\spring-expression\5.0.0.RELEASE\spring-expression-5.0.0.RELEASE.jar;D:\download\tool\ide\idea\2016\ideaIU-2016\install\lib\idea_rt.jar com.intellij.rt.execution.application.AppMain com.ruge.test.test
hello:愛麗絲、如歌

Process finished with exit code 0

IOC與DI

　　設計原則中好萊塢原則描述到，“別找我們，我們找你”，百度百科上對這點描述是“不要給我們打電話，我們會給你打電話(don‘t call us, we‘ll call you)”這是著名的好萊塢原則。在好萊塢，把簡歷遞交給演藝公司後就只有回家等待。由演藝公司對整個娛樂項的完全控制，演員只能被動式的接受公司的差使,在需要的環節中，完成自己的演出。這一點完美的提現了在IOC身上，IOC所注重的是設計思想上，從一個常規的建立物件的做法，即new一個物件，轉變成向IOC容器遞交”簡歷“，被動的等待IOC容器返回資源給你。控制反轉即指的是”演藝公司控制演員“，而說到依賴，則是“演員需要公司混飯”，我們所需求的物件，需要依賴容器來獲得，這個過程即是依賴注入。本質上IOC和DI是同一思想下不同維度的表現。

<?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">
    <!-- 配置需要被Spring管理的Bean（建立，建立後放在了Spring IOC容器裡面）-->
    <bean id="hello" class="com.ruge.test.HelloWorld">
        <!-- 配置該Bean需要注入的屬性（是通過屬性set方法來注入的） -->
        <property name="name" value="劉德華"></property>
    </bean>

</beans>

package com.ruge.test;

        import org.springframework.context.ApplicationContext;
        import org.springframework.context.support.ClassPathXmlApplicationContext;

/**
 * 描述:
 * main測試類
 *
 * @outhor 愛麗絲、如歌
 * @create 2017-11-01 20:52
 */
public class test {
    public static void main(String[] args) {
        //獲取Spring的ApplicationContext配置檔案，注入IOC容器中
        ApplicationContext applicationContext = new ClassPathXmlApplicationContext("applicationContext.xml");
        HelloWorld helloWorld = (HelloWorld) applicationContext.getBean("hello");
        //呼叫方法
        helloWorld.hello();
    }
}

D:\download\tool\jdk\jdk8_64\install\bin\java -Didea.launcher.port=7534 -Didea.launcher.bin.path=D:\download\tool\ide\idea\2016\ideaIU-2016\install\bin -Dfile.encoding=UTF-8 -classpath D:\download\tool\jdk\jdk8_64\install\jre\lib\charsets.jar;D:\download\tool\jdk\jdk8_64\install\jre\lib\deploy.jar;D:\download\tool\jdk\jdk8_64\install\jre\lib\ext\access-bridge-64.jar;D:\download\tool\jdk\jdk8_64\install\jre\lib\ext\cldrdata.jar;D:\download\tool\jdk\jdk8_64\install\jre\lib\ext\dnsns.jar;D:\download\tool\jdk\jdk8_64\install\jre\lib\ext\jaccess.jar;D:\download\tool\jdk\jdk8_64\install\jre\lib\ext\jfxrt.jar;D:\download\tool\jdk\jdk8_64\install\jre\lib\ext\localedata.jar;D:\download\tool\jdk\jdk8_64\install\jre\lib\ext\nashorn.jar;D:\download\tool\jdk\jdk8_64\install\jre\lib\ext\sunec.jar;D:\download\tool\jdk\jdk8_64\install\jre\lib\ext\sunjce_provider.jar;D:\download\tool\jdk\jdk8_64\install\jre\lib\ext\sunmscapi.jar;D:\download\tool\jdk\jdk8_64\install\jre\lib\ext\sunpkcs11.jar;D:\download\tool\jdk\jdk8_64\install\jre\lib\ext\zipfs.jar;D:\download\tool\jdk\jdk8_64\install\jre\lib\javaws.jar;D:\download\tool\jdk\jdk8_64\install\jre\lib\jce.jar;D:\download\tool\jdk\jdk8_64\install\jre\lib\jfr.jar;D:\download\tool\jdk\jdk8_64\install\jre\lib\jfxswt.jar;D:\download\tool\jdk\jdk8_64\install\jre\lib\jsse.jar;D:\download\tool\jdk\jdk8_64\install\jre\lib\management-agent.jar;D:\download\tool\jdk\jdk8_64\install\jre\lib\plugin.jar;D:\download\tool\jdk\jdk8_64\install\jre\lib\resources.jar;D:\download\tool\jdk\jdk8_64\install\jre\lib\rt.jar;D:\project_idea\spring\target\classes;D:\download\tool\versionControl\maven\localRepository\commons-logging\commons-logging\1.2\commons-logging-1.2.jar;D:\download\tool\versionControl\maven\localRepository\org\springframework\spring-beans\5.0.0.RELEASE\spring-beans-5.0.0.RELEASE.jar;D:\download\tool\versionControl\maven\localRepository\org\springframework\spring-context\5.0.0.RELEASE\spring-context-5.0.0.RELEASE.jar;D:\download\tool\versionControl\maven\localRepository\org\springframework\spring-aop\5.0.0.RELEASE\spring-aop-5.0.0.RELEASE.jar;D:\download\tool\versionControl\maven\localRepository\org\springframework\spring-core\5.0.0.RELEASE\spring-core-5.0.0.RELEASE.jar;D:\download\tool\versionControl\maven\localRepository\org\springframework\spring-jcl\5.0.0.RELEASE\spring-jcl-5.0.0.RELEASE.jar;D:\download\tool\versionControl\maven\localRepository\org\springframework\spring-expression\5.0.0.RELEASE\spring-expression-5.0.0.RELEASE.jar;D:\download\tool\ide\idea\2016\ideaIU-2016\install\lib\idea_rt.jar com.intellij.rt.execution.application.AppMain com.ruge.test.test
十一月 01, 2017 9:30:56 下午 org.springframework.context.support.ClassPathXmlApplicationContext prepareRefresh
資訊: Refreshing org[email protected]5387f9e0: startup date [Wed Nov 01 21:30:56 CST 2017]; root of context hierarchy
十一月 01, 2017 9:30:57 下午 org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions
資訊: Loading XML bean definitions from class path resource [applicationContext.xml]
hello:劉德華

Process finished with exit code 0