Spring 4.0

描述

Spring（官網：projects.spring.io）是一個框架，為了簡化企業級應用開發而生，使用Spring可以使簡單的javabean實現以前只有gjb才能實現的功能。

安裝

下載spring的jar包，在eclipse中選擇help–>install new software–>add–>archive，然後找到下載的安裝包，選中，在選擇功能中選擇帶有spring IDE的專案，安裝重啟即可.
若在window–> preperences可以找到Spring選項，表示安裝成功

hello world

1、新建Java project
2、匯入
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
五個包
3、新建一個bean類

public class Person {

    private String name;
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public void run(){
        System.out.println(name+ " running");
    }
}

4、建立一個Spring配置檔案，即new–>Spring Bean Configuration File

<?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 = "person
 
" class="com.spring.test.Person">
    <property name="name" value = "spring"></property>

    </bean>
</beans>

5、編寫main

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class Main {

    public static void main(String[] args) {
        ApplicationContext application = new ClassPathXmlApplicationContext("applicationContext.xml");
        Person person = (Person) application.getBean("person");
        person.run();
    }

}

6、執行

一月 09, 2018 10:16:10 下午 org.springframework.context.support.AbstractApplicationContext prepareRefresh
INFO: Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@28fa1b85: startup date [Tue Jan 09 22:16:10 CST 2018]; root of context hierarchy
一月 09, 2018 10:16:10 下午 org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions
INFO: Loading XML bean definitions from class path resource [applicationContext.xml]
spring running