SpringBoot实现yml配置文件为变量赋值

yml配置文件为变量赋值

1. 创建person类和car类

在person类上加注释 @configurationproperties(prefix = "person")，表明这个类的成员变量的值从配置类注入。

注意这里的person类的成员变量需要有get/set方法。

 
import org.springframework.boot.context.properties.configurationproperties; 
import java.util.date;
import java.util.list;
import java.util.map; 
 
@configurationproperties(prefix = "person")
public class person {
    public string getname() {
        return name;
    }
 
    public void setname(string name) {
        this.name = name;
    }
 
    public integer getage() {
        return age;
    }
 
    public void setage(integer age) {
        this.age = age;
    }
 
    public double getsalary() {
        return salary;
    }
 
    public void setsalary(double salary) {
        this.salary = salary;
    }
 
    public boolean ismarriage() {
        return ismarriage;
    }
 
    public void setmarriage(boolean marriage) {
        ismarriage = marriage;
    }
 
    public car getcar() {
        return car;
    }
 
    public void setcar(car car) {
        this.car = car;
    }
 
    public list<string> gethobbit() {
        return hobbit;
    }
 
    public void sethobbit(list<string> hobbit) {
        this.hobbit = hobbit;
    }
 
    public map<string, object> getmaps() {
        return maps;
    }
 
    public void setmaps(map<string, object> maps) {
        this.maps = maps;
    }
 
    public date getbirthdate() {
        return birthdate;
    }
 
    public void setbirthdate(date birthdate) {
        this.birthdate = birthdate;
    }
 
    private string name; 
    private integer age; 
    private double salary; 
    private boolean ismarriage; 
    private car car; 
    private list<string> hobbit; 
    private map<string, object> maps; 
    private date birthdate;
}

 
public class car { 
    private string carname; 
    private string carbrand; 
    public string getcarname() {
        return carname;
    }
 
    public void setcarname(string carname) {
        this.carname = carname;
    }
 
    public string getcarbrand() {
        return carbrand;
    }
 
    public void setcarbrand(string carbrand) {
        this.carbrand = carbrand;
    }
}

2. 为person类创建yml配置文件

person:
  name: zhangsan
  age: 18
  salary: 8888.88
  car:
    carname: 奥迪a6l
    carbrand: 奥迪
  hobbit:
    - 篮球
    - rap
    - 唱歌
    - 保健
  maps:
    k1: v1
    k2: v2
  birthdate: 1991/08/21
  marriage: true

3.创建启动类

加上注释@enableconfigurationproperties(person.class)，启动的时候提醒person这个class的成员变量是可以从配置文件注入的。

import org.springframework.beans.factory.annotation.autowired;
import org.springframework.boot.springapplication;
import org.springframework.boot.autoconfigure.springbootapplication;
import org.springframework.boot.context.properties.enableconfigurationproperties;
import org.springframework.web.bind.annotation.requestmapping;
import org.springframework.web.bind.annotation.restcontroller;
 
@springbootapplication
@enableconfigurationproperties(person.class)
@restcontroller
public class tulingspc01springbootpropertiesmappingapplication {
 
	@autowired
	private person person; 
	public static void main(string[] args) {
		springapplication.run(tulingspc01springbootpropertiesmappingapplication.class, args);
	}
 
	@requestmapping("/getpersoninfo")
	public person getpersoninfo() {
		return person;
	} 
}

 测试结果：

在yml文件中配置变量

在开发中很多内容不能写死在代码中

就需要动态的配置

例如：二维码的内容

yml文件里增加变量配置

qrcode:
  content: http://192.168.1.1:8081

在代码里获取信息的时候

@value("${qrcode.content}")
private string content;

这样就可以获取yml文件里配置的内容了

降低了代码的耦合

以上为个人经验，希望能给大家一个参考，也希望大家多多支持。