第一个HelloWorld程序
工程是在以下开发环境下完成的
Spring Framework 4.0.4 RELEASEEclipse MARS 版本maven plugin for eclipse第一步:创建maven项目
第二步:创建目录结构
第三步:添加代码
beans.xml
<?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="HelloWorldImpl01" class="com.main.impl.HelloWorldImpl01"></bean> <bean id="HelloWorldImpl02" class="com.main.impl.HelloWorldImpl02"></bean> <bean id="helloWorldService" class="com.main.service.HelloWorldService"> <property name="helloWorld" ref="HelloWorldImpl02"/> </bean></beans>HelloWorldService.java
package com.main.service;import com.main.model.HelloWorld;public class HelloWorldService { private HelloWorld helloWorld; //default constructor public HelloWorldService(){ } //HelloWHorld getter public HelloWorld getHelloWorld() { return helloWorld; } //HelloWorld setter public void setHelloWorld(HelloWorld helloWorld) { this.helloWorld = helloWorld; }}HelloWorld.java
package com.main.model;public interface HelloWorld { public void sayHello();}HelloWorldImpl01.java
package com.main.impl;import com.main.model.HelloWorld;public class HelloWorldImpl01 implements HelloWorld{ public void sayHello() { System.out.println("HelloWorldImpl-------01"); }}HelloWorldImpl02.java
package com.main.impl;import com.main.model.HelloWorld;public class HelloWorldImpl02 implements HelloWorld{ public void sayHello() { System.out.println("HelloWorldImpl------02"); }}APPTest.java
package com.main.SpringPart01;import org.junit.Test;import org.springframework.context.applicationContext;import org.springframework.context.support.ClassPathXmlApplicationContext;import com.main.model.HelloWorld;import com.main.service.HelloWorldService;public class AppTest { @Test public void test(){ ApplicationContext context = new ClassPathXmlApplicationContext("beans.xml"); HelloWorldService service =(HelloWorldService)context.getBean("helloWorldService"); HelloWorld hw= service.getHelloWorld(); hw.sayHello(); }}第四步:测试运行结果
在以上代码均添加完成后,运用AppTest的junit单元测试运行,可以看到控制台输出结果为下图所示
到此,Spring的入门第一个helloworld程序完成
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