springboot2.0.0 使用 spring5.0.4

Hello.java   测试入口类
Config.java  Java配置类    
User.java    用户数据对象类 使用Value注解注入 name属性
application.properties  配置文件
logback.xml


Java Config 注解 @Configuration
配置文件引入 @PropertySource("classpath:application.properties")
Java配置bean注解 @Bean
配置属性注入注解 	@Value("${name}")
AnnotationConfigApplicationContext 初始化 注册配置类 refresh
logback配置 debug 输出到 控制台





Hello.java

import java.util.Date;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;

public class Hello{
	public static void main(String[] args) throws Exception {
		System.out.println("spring5 hello,"+new Date());
		AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext();
		ctx.register(Config.class);
		ctx.refresh();
		User user = (User)ctx.getBean("user");
		System.out.println(user.getName());
		ctx.close();
	}
}


Config.java

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.PropertySource;

@PropertySource("classpath:application.properties")
@Configuration
public class Config{
	@Bean
	public User user(){
		return new User();
	}	
}


User.java

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

public class User{	
	@Value("${name}")
	private String name;
	
	public String getName(){
		return name;
	}
}




logback.xml


<?xml version="1.0" encoding="UTF-8"?>  
<configuration scan="true" scanPeriod="60 seconds" debug="true">  
    <appender name="STD" class="ch.qos.logback.core.ConsoleAppender">  
        <encoder>  
            <pattern>%d{yyyy-MM-dd HH:mm:ss} [%thread] %-5level %logger -%msg%n</pattern>  
        </encoder>  
    </appender>  
 
    <root level="DEBUG">  
        <appender-ref ref="STD" />  
    </root>  
</configuration>  


完整代码
https://gitee.com/dyyx/hellocode/tree/master/demo/springbootdemo/src/main/java/spring5