咳咳,簡單介紹下Spring吧(畫重點了,一本正經臉)
Spring是一個基於IOC和AOP的J2EE系統框架,簡單的來說,就是我們以前程序員自己需要自己去New對象,現在好了,我們把這項任務交個Spring容器去,讓他幫我們去new對象,我們拿到對象的屬性之後,就是已經被注好的值,直接用就行
1:老規矩,第一步先創建一個java項目
2:創建一個lib包,然後把Jar包加到我們的環境中去
3:創建實體類EntityClass文件
package com.ccut.pojo;
/**
* 實體類我們演示控制反轉,類交給Spring容器去實例化
*/
public class EntityClass {
private int id;
private String name;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
4:寫配置文件applicationContent.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"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd">
<bean name="a" class="com.ccut.pojo.EntityClass">
<property name="name" value="Ericfei"/>
<property name="id" value="20152226"/>
</bean>
</beans>
5:主方法中我們進行測試
package com.ccut;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import com.ccut.pojo.EntityClass;
/*
* 主方法
*/
public class TestMian {
public static void main(String[] args) {
//1:加載配置文件
/**
*
*/
ApplicationContext content=new ClassPathXmlApplicationContext(new String[]{ "applicationContext.xml" });
//獲得實體類bean
EntityClass entityClass=(EntityClass) content.getBean("a");
System.out.println(entityClass.getName());
System.out.println(entityClass.getId());
}
/**
*
* ApplicationContext ac = new ClassPathXmlApplicationContext("applicationContext.xml");
RegisterDAO registerDAO = (RegisterDAO)ac.getBean("RegisterDAO");
如果是兩個以上:
ApplicationContext ac = new ClassPathXmlApplicationContext(new String[]{"applicationContext.xml","dao.xml"});
或者用通配符:
ApplicationContext ac = new ClassPathXmlApplicationContext("classpath:/*.xml");
*/
}
6:實現結果
7:結果分析
我們不用自己去傻傻的去new對象了,類與類之間達到解耦的目的(其實結果沒什麼好分析的.......硬扯上這句話)