Spring开发环境搭建以及创建示例工程

野性酷女 2022-07-11 11:14 165阅读 0赞

一、环境搭建

Spring开发包的下载位置[http://repo.spring.io/release/org/springframework/spring/][http_repo.spring.io_release_org_springframework_spring]

二、创建示例工程

1、建立Java Project工程

File-> new other->Java->Java Project        工程名为 Test

在工程文件下新建lib文件夹，将spring-framework压缩包中的libs文件夹中的jar文件拷贝到工程文件中的lib文件中，点击刷新

为了在工程中使用上述Jar文件，需要添加到Build Path中

右键Propertries选择 Java Build Path,点击Libraries 下的Add JARs  选择Test工程下的lib中的所有jar文件

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点击OK

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完成后的工程目录

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2、编写Java文件

a.新建Java Interface

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在IHelloMessage中创建方法

package com.cc.test;
    public interface IHelloMessage {
        public String sayHello();
    
    }

b.创建接口实现类HelloWorld, 接口实现类，向用户输出“Hello everybody”信息

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package com.cc.test;
    
    public class HelloWorld implements IHelloMessage {
    
    	@Override
    	public String sayHello() {
    	// TODO Auto-generated method stub
    		return "Hello World!";
    	}
    
    }

c.创建HelloChina实现类

package com.cc.test;
    
    public class HelloChina implements IHelloMessage {
    
    	@Override
    	public String sayHello() {
    		// TODO Auto-generated method stub
    		return "大家好";
    	}
    }

d.创建Person类,调用IHelloMessage接口，向用户输出问候信息

在Person类中引用IHelloMessage类，并为helloMessage创建get和set方法，右键helloMessage

选择Source->Generate Getters and Setters

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选择Select All 点击OK

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public class Person {
    	private IHelloMessage helloMessage;
    
    	public IHelloMessage getHelloMessage() {
    		return helloMessage;
    	}
    
    	public void setHelloMessage(IHelloMessage helloMessage) {
    		this.helloMessage = helloMessage;
    	}
    	
    	public String sayHello() {
    		return this.helloMessage.sayHello();
    	}
    	
    }

e.创建Main程序入口，用于加载配置文件，以及IOC容器，调用人物类，向用户输出问候信息

在创建类时需要选择public static void main(String \[\] args)方法

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package com.cc.test;
    
    import org.springframework.beans.factory.BeanFactory;
    import org.springframework.beans.factory.xml.XmlBeanFactory;
    import org.springframework.core.io.FileSystemResource;
    import org.springframework.core.io.Resource;
    
    public class Main {
    
    	public static void main(String[] args) {
    	// TODO Auto-generated method stub
    		Resource resource = new FileSystemResource("helloMessage.xml"); // 用于读取配置文件
    		BeanFactory factory = new XmlBeanFactory(resource); // 用于加载配置文件
    		Person  person=(Person)factory.getBean("person");                                        
    		String string=person.sayHello(); 
    		System.out.println(string);
    
    	}
    
    }

3、编写配置文件

a.新建配置文件helloMessage.xml

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<?xml version="1.0" encoding="UTF-8"?>
    <!DOCTYPE beans PUBLIC "-//SPRING/DTD BEAN/EN"
    "http://www.springframework.org/dtd/spring-bin.dtd">
    <beans>
    <bean id ="helloWorld" class="com.cc.test.HelloWorld"></bean>
    <bean id="helloChina"  class="com.cc.test.HelloChina"></bean>
    <bean id="person"      class="com.cc.test.Person">
    <property name="helloMessage" ref="helloChina"></property>
    </bean>
    
    </beans>

4、运行事例工程

出现错误

Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/commons/logging/LogFactory  
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.<init>(DefaultSingletonBeanRegistry.java:83)  
at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.<init>(FactoryBeanRegistrySupport.java:43)  
at org.springframework.beans.factory.support.AbstractBeanFactory.<init>(AbstractBeanFactory.java:178)  
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.<init>(AbstractAutowireCapableBeanFactory.java:160)  
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.<init>(AbstractAutowireCapableBeanFactory.java:171)  
at org.springframework.beans.factory.support.DefaultListableBeanFactory.<init>(DefaultListableBeanFactory.java:193)  
at org.springframework.beans.factory.xml.XmlBeanFactory.<init>(XmlBeanFactory.java:78)  
at org.springframework.beans.factory.xml.XmlBeanFactory.<init>(XmlBeanFactory.java:67)  
at com.cc.test.Main.main(Main.java:13)  
Caused by: java.lang.ClassNotFoundException: org.apache.commons.logging.LogFactory  
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)  
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)  
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)  
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)  
... 9 more

是因为缺少缺少 commons-logging.jar

下载地址  [http://download.csdn.net/detail/lrici/9743894][http_download.csdn.net_detail_lrici_9743894]

运行结果

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修改helloMessage文件

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运行结果

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源码地址[http://download.csdn.net/detail/lrici/9743891][http_download.csdn.net_detail_lrici_9743891]

[http_repo.spring.io_release_org_springframework_spring]: http://repo.spring.io/release/org/springframework/spring/
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