SpringBoot實現yml配置文件為變量賦值

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yml配置文件為變量賦值

1. 創建person類和Car類

在person類上加註釋 @ConfigurationProperties(prefix = "person")，表明這個類的成員變量的值從配置類註入。

註意這裡的person類的成員變量需要有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. 為person類創建yml配置文件

person:
  name: zhangsan
  age: 18
  salary: 8888.88
  car:
    carName: 奧迪A6L
    carBrand: 奧迪
  hobbit:
    - 籃球
    - rap
    - 唱歌
    - 保健
  maps:
    k1: v1
    k2: v2
  birthDate: 1991/08/21
  marriage: true

3.創建啟動類

加上註釋@EnableConfigurationProperties(Person.class)，啟動的時候提醒Person這個class的成員變量是可以從配置文件註入的。

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;
	} 
}

 測試結果：

在yml文件中配置變量

在開發中很多內容不能寫死在代碼中

就需要動態的配置

例如：二維碼的內容

yml文件裡增加變量配置

QrCode:
  content: http://192.168.1.1:8081

在代碼裡獲取信息的時候

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

這樣就可以獲取yml文件裡配置的內容瞭

降低瞭代碼的耦合

以上為個人經驗，希望能給大傢一個參考，也希望大傢多多支持WalkonNet。

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