spring笔记

applicationContext.xml

<bean id="helloBean" class="main.Hello"><property name="myString" value="iiiiiiiiiiiiiiiii"></property></bean>

App.java

public class App {public static void main(String[] args) {ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");//取配置文件Hello objHello = (Hello) context.getBean("helloBean");//取id为helloBean的bean，并且将成员变量myString的值设为iiiiiiiiiiiiiiiiiSystem.out.println("===" + objHello.getMyString());}}

Hello.java

//类要使用spring注入，必须遵循bean规范【类必须是一个公共类，有一个空的构造函数，类变量都为private，并且有对应变量的getter/setter方法】public class Hello {private String myString;public void setMyString(String string){this.myString = string;}public String getMyString() {return this.myString;}}