在spring boots配置中取值

在application.yaml添加配置

server:
 port: 8001
size: big
index: 1
content: "欢迎使用 ${size} 版本：${index}"

创建配置类

使用@Value关联配置中的值

package com.example.demo;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;

/**
 * Created by chenbo on 2018/5/24.
 */
@RestController
public class HelloController {

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

    @Value ( "${index}" )
    private int index;

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

    @RequestMapping(value = "/hello" , method = RequestMethod.GET)
    public String say(){
        return "欢迎使用！"+ index;
    }
}