工具：maven、spring framework（4.2.4.RELEASE）

示例代码：https://download.csdn.net/download/u010476739/11419584

spring framwork的核心功能是依赖注入、作为对象工厂

试验条件：

maven

spring framwork 4.2.4.RELEASE

试验目的：

试验spring配置文件的加载方式，以及使用注解类代替配置文件启动容器。

1. 首先pom.xml 文件

<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/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.jackletter</groupId> <artifactId>hellospring</artifactId> <version>0.0.1-SNAPSHOT</version> <name>this is name</name> <description>this is desc</description> <properties> <spring.version>4.2.4.RELEASE</spring.version> </properties> <dependencies> <!-- Spring Core --> <!-- http://mvnrepository.com/artifact/org.springframework/spring-core --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-core</artifactId> <version>${spring.version}</version> </dependency> <!-- Spring Context --> <!-- http://mvnrepository.com/artifact/org.springframework/spring-context --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>${spring.version}</version> </dependency> </dependencies> </project>

2.准备applicationContext.xml

<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="dog" class="springconf.Dog"></bean> <bean id="cat" class="springconf.Cat"></bean> <bean id="srv" class="springconf.Srv"> <property name="animate" ref="dog"></property> </bean> </beans>

3.代码结构

4. 代码

Animate.java

package springconf; public interface Animate { public String show(); }

Cat.java

package springconf; public class Cat implements Animate { public String show() { return "i'm Cat"; } }

Dog.java

package springconf; public class Dog implements Animate { public String show() { return "i'm Dog"; } }

Srv.java

package springconf; public class Srv { public Animate animate; public Animate getAnimate() { return animate; } public void setAnimate(Animate animate) { this.animate = animate; } public String show() { return animate.show(); } }

AppConfig.java

package springconf; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; @Configuration public class AppConfig { @Bean(name="srv") public Srv getSrv() { Srv srv = new Srv(); srv.setAnimate(new Cat()); return srv; } }

App.java

package springconf; import org.springframework.context.ApplicationContext; import org.springframework.context.annotation.AnnotationConfigApplicationContext; import org.springframework.context.annotation.Configuration; import org.springframework.context.support.ClassPathXmlApplicationContext; import org.springframework.context.support.FileSystemXmlApplicationContext; public class App { static ApplicationContext context=null; public static void main(String[] args) { //1. 寻找spring配置文件方式1 这个文件在"springconf\src\main\resources\applicationContext.xml" context = new ClassPathXmlApplicationContext("applicationContext.xml"); //2. 寻找spring配置文件方式2 效果等同上面 //context = new ClassPathXmlApplicationContext("classpath:applicationContext.xml"); //3. 寻找spring配置文件方式3 使用绝对路径,一般不使用 //context = new ClassPathXmlApplicationContext("file:E:/elipsespace/springconf/target/classes/applicationContext.xml"); //4.使用注解类加载 context = new AnnotationConfigApplicationContext(AppConfig.class); System.out.println(((Srv) context.getBean("srv")).show()); } }

5.运行