spring_IOC_XML配置

一、Spring之HelloWorld

1.導入所需的jar

a.一般方法

commons-logging-1.1.1.jar
spring-beans-4.0.0.RELEASE.jar
spring-context-4.0.0.RELEASE.jar
spring-core-4.0.0.RELEASE.jar
spring-expression-4.0.0.RELEASE.jar

b.Maven

<spring.version>4.0.0.RELEASE</spring.version>
<commons.logging.version>1.1.1</commons.logging.version>
<junit.version>4.12</junit.version>

</properties>

<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>${spring.version}</version>

</dependency>
<dependency>

<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
<version>${spring.version}</version>

</dependency>
<dependency>

<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${spring.version}</version>

</dependency>
<dependency>

<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${spring.version}</version>

</dependency>
<dependency>

<groupId>commons-logging</groupId>
<artifactId>commons-logging</artifactId>
<version>${commons.logging.version}</version>

</dependency>

<dependency>

<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>${junit.version}</version>
<scope>test</scope>

</dependency>

</dependencies>

2.創建applicationContext.xml配置文件

a.創建Spring Bean Configuration File

b.創建IOC容器，並容器中獲取bean

二、IOC容器

1.IOC(Inversion of Control):其思想是反轉資源獲取的方向. 傳統的資源查找方式要求組件向容器發起請求查找資源. 做為回應容器適時的返回資源. 而應用了IOC容器之後, 則是容器主動的將資源推送給他所管理的組件, 組件所要做得僅是選擇一種合適的方式來接受資源.這種行為也被稱為查找的被動形式

2.BeanFactory:面向框架本身的.是IOC容器的基礎設施.

3..ApplicationContext:面向開發者.

ClasspathXmlApplicationContext.