計(jì)劃用一個(gè)月時(shí)間來(lái)學(xué)習(xí)Spring，在這里把自己的學(xué)習(xí)過(guò)程記錄下來(lái)，方便想學(xué)習(xí)Spring的人，也為自己日后復(fù)習(xí)有個(gè)參考。以下通過(guò)一個(gè)簡(jiǎn)單的例子來(lái)先了解下Spring的用法。
(1)創(chuàng)建一個(gè)java工程，建立如下類：HelloBean
package com.ducklyl;
public class HelloBean {
private String helloWord;
public String getHelloWord() {
return helloWord;
}
public void setHelloWord(String helloWord) {
this.helloWord = helloWord;
}
}
(2)創(chuàng)建Spring配置文件：beans-config.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd">
<beans>
<bean id="helloBean" class="com.ducklyl.HelloBean">
<property name="helloWord">
<value>Hello,ducklyl!</value>
</property>
</bean>
</beans>
(3)導(dǎo)入Spring所需的包：commons-logging.jar，spring.jar 。(日志包和Spring包)
包下載地址：
http://www.ziddu.com/download/3555993/Spring.rar.html
(4)創(chuàng)建測(cè)試類：SpringDemo.java
package com.ducklyl;
import org.springframework.core.io.FileSystemResource;
import org.springframework.core.io.Resource;
import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.xml.*;
public class SpringDemo{
public static void main(String[] args)
{
//讀取配置文件
Resource rs=new FileSystemResource("beans-config.xml");
//實(shí)例化Bean工廠
BeanFactory factory=new XmlBeanFactory(rs);
//獲取id="helloBean"對(duì)象
HelloBean hello=(HelloBean)factory.getBean("helloBean");
//調(diào)用helloBean對(duì)象getHelloWord()方法
System.out.println(hello.getHelloWord());
}
}
如果以上配置正確的話，運(yùn)行SpringDemo.java，可以看到輸出結(jié)果：Hello,ducklyl！