使用@Autowired自动装配读取yml配置里数据

参考：Spring注解@Qualifier的详细用法你知道几种

1.使用自动装配将所有的数据封装到一个对象中

    //使用自动装配将所有的数据封装到一个对象中
    @Autowired
    private Environment env;

Environment错误解决方法

参考：https://blog.csdn.net/qq_49249150/article/details/109028615

2.自定义对象封装指定数据

//使用自动装配将数据封装一个对应的bean中
    @Autowired
    private MyDataSource myDataSource;

package com.tj;
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;
    @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;
    }
    private String password;
}

参考：Spring Boot Configuration Annotation Processor not configured 问题解决
引入依赖

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-configuration-processor</artifactId>
</dependency>