springboot 学习笔记（三）属性注入

配置文件使用的application.yml

jdbc:
  driverClassName: com.mysql.jdbc.Driver
  url: jdbc:mysql://127.0.0.1:3306/test
  username: root
  password: root
  user:
    name: jack
    age: 22
    language:
      - java
      - php

定义读取配置文件的类

package com.liu.config;

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

import java.util.List;
//配置文件的前缀 prefix
@ConfigurationProperties(prefix = "jdbc")
@Data
@Component
public class jdbcProperties {
    String url;
    String driverClassName;
    String username;
    String password;
    User user = new User();
    @Data
    class User{
        String name;
        int age;
        List language;
    }

}

定义方法测试一下数据

@RestController
public class HelloWebController {
    @Autowired
    private jdbcProperties jdbcProperties;

    @RequestMapping("/hello")
    public  Object hello(){
        return jdbcProperties;
    }
}

读取配置文件的方式有很多种，我觉得这种挺好用哈哈哈！