前言

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提示：以下是本篇文章正文内容，下面案例可供参考

一、创建并编辑对应的文件

1.application.yaml

server:
  port: 8080

contry: china

user:
  - name: zhangsan
    age: 18
  - name: lisi
    age: 20

likes:
  - ball
  - code
  - game



baseDir: c:/win10

#使用${属性名}引用数据
tempDir: ${baseDir}/temp


#创建类：用于封装下面的数据
#由spring帮我们去加载数据对象中，一定告诉spring加载这组信息
#使用时候从spring中直接获取信息使用

datasource:
  driver: com.mysql.jdbc.Driver
  url: jdbc:mysql://localhost/springboot_db
  username: root
  password: root

2.MyDataSource

package com.codejams;

import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.stereotype.Component;

//1.定义数据模型封装yaml文件中对应的数据
//2.定义为spring管控的bean
@Component
//3.指定加载的数据
@ConfigurationProperties(prefix="datasource")
public class MyDataSource {
    private String driver;
    private String url;
    private String username;
    private String password;

    @Override
    public String toString() {
        return "MyDataSource{" +
                "driver='" + driver + '\'' +
                ", url='" + url + '\'' +
                ", username='" + username + '\'' +
                ", password='" + password + '\'' +
                '}';
    }

    public String getDriver() {
        return driver;
    }

    public void setDriver(String driver) {
        this.driver = driver;
    }

    public String getUrl() {
        return url;
    }

    public void setUrl(String url) {
        this.url = url;
    }

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }
}

二、使用步骤

1.测试代码

代码如下（示例）：

package com.codejams.controller;

import com.codejams.MyDataSource;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.core.env.Environment;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
@RequestMapping("books")
public class BookController {

    //读取yaml文件
    @Value("${contry}")
    private String contry;

    @Value("${user[1].name}")
    private String name;

    @Value("${likes[1]}")
    private String like;

    @Value("${tempDir}")
    private String tempDir;

    //使用Environment对象封装所有数据
    @Autowired
    private Environment env;

    //查看datasource是否注入成功
    @Autowired
    private MyDataSource myDataSource;

    @GetMapping
    public String test(){
        System.out.println("running...");
        System.out.println(contry);
        System.out.println(name);
        System.out.println(like);
        System.out.println(tempDir);
        System.out.println("----------------------------");

        System.out.println(env.getProperty("contry"));
        System.out.println(env.getProperty("user[1].name"));
        System.out.println("----------------------------");

        System.out.println(myDataSource);


        return "running..";
    }
}

2.效果展示

如下（示例）：

在这里插入图片描述