Spring入门(注解方式)

一概述

二代码

<?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:context="http://www.springframework.org/schema/context"
xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">

<!-- <context:annotation-config /> -->

<!-- 下面的配置作用是指定spring扫描的包,它包含了context:annotation-config的功能，所以在开发中一般就不需要在配置上面的 -->
<context:component-scan base-package="cn.itheima" />

</beans>

package com.blueSky.annotation;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Scope;
import org.springframework.stereotype.Component;

@Component
@Scope(value="prototype")  //设置为多例
public class HelloSpringAnno {
@Value("你好，spring注解开发")
private String content;

@Autowired
private HelloSpringAnno_02 helloSpringAnno_02;

public String getContent() {
return content;
}
public void setContent(String content) {
this.content = content;
}
public HelloSpringAnno_02 getHelloSpringAnno_02() {
return helloSpringAnno_02;
}
public void setHelloSpringAnno_02(HelloSpringAnno_02 helloSpringAnno_02) {
this.helloSpringAnno_02 = helloSpringAnno_02;
}

public void printContent(){
System.out.println(content+"      "+helloSpringAnno_02.getContent());
}
}

package com.blueSky.annotation;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;

@Component
public class HelloSpringAnno_02 {
@Value("你好，spring！")
private String content;

public String getContent() {
return content;
}

public void setContent(String content) {
this.content = content;
}

}

<?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:context="http://www.springframework.org/schema/context"
xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">

<!-- 下面的配置作用是指定spring扫描的包,它包含了context:annotation-config的功能，所以在开发中一般就不需要在配置上面的 -->
<context:component-scan base-package="com.blueSky.annotation" />

</beans>

package test;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

import com.blueSky.annotation.HelloSpringAnno;

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = "classpath:applicationContext.xml")
public class SpringJunitTest {

@Autowired
private HelloSpringAnno helloSpringAnno;

@Test
public void test(){
helloSpringAnno.printContent();
}

}