之前博主学习了spring，springmvc等架构课程，随着技术不断地完善，代码架构也不断地发展。spring是在Java代码地基础上进行双手解放，springmvc也是在Java代码地基础上不断地解放双手，从今天开始，博主也将开始学习spring boot课程，spring boot课程主要体现在自动化方面，上一篇文章则是主要讲解了，spring boot是如何通过架构来实现双手地解放spring boot自动化原理(底层代码讲解)

一：通过spring boot向属性赋值的几种方法

方法一：通过最为基础地注解@value来进行赋值

package com.example.demo.hellow;import org.junit.Test;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Configuration;
import org.springframework.stereotype.Component;@Component      //添加注解，使此类能够被扫描器扫描到
public class value_demo {@Value("不想睡醒的梦")private String name;@Value("22")private int age;public value_demo() {}public void setName(String name) {this.name = name;}public void setAge(int age) {this.age = age;}public String getName() {return name;}public int getAge() {return age;}@Overridepublic String toString() {return "value_demo{" +"name='" + name + '\'' +", age=" + age +'}';}public value_demo(String name, int age) {this.name = name;this.age = age;}
}

测试类:在系统配置地测试类进行测试

package com.example.demo;import com.example.demo.hellow.value_demo;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;@SpringBootTest
class DemoApplicationTests {@Autowired    //注入属性private com.example.demo.hellow.value_demo value_demo;@Testvoid contextLoads() {System.out.println(value_demo);}}

 控制台进行输出:

 方法二:通过配置文件,添加属性值，并将配置地属性值注入到类中

创建属性类：

package com.example.demo.hellow;import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.stereotype.Component;import java.util.Date;
import java.util.List;
import java.util.Map;@Component
@ConfigurationProperties(prefix = "person")   //将配置文件地配置注入到此类中地属性中
public class value_demo2 {private String name;private Integer age;private Boolean happy;private Date birth;private Map maps;private List