springboot配置

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2022-01-11

官方文档

Sping Boot Reference Guide

#更改项目的端口号
server.port=8081

#springboot这个配置文件中到底可以配置哪些东西呢

#方法一，官方的配置太多了


#方法二，了解原理，一通百通

配置文件

Sprongboot使用一个全局的配置文件，配置文件名称是固定的

  • application.properties
    • 语法结构：key=value
  • application.yml
    • 语法结构：key:空格 value

yaml配置：

server:
	prot: 8080

server:
  port: 8081
  #对空格的要求非常严格
  #普通的key-value

  #注入到我们的配置类中！

  name: lina

  #对象
  student:
    name: lina
    age: 3

    #行内写法
    student: {name: lina,age: 3}

    # 数组
pets:
  - cat
  - dog
  - pig

 pets: [cat,dog,pig]

xml配置：

<server>
    <port>8081<port>
</server>

给属性赋值的几种方式

第一种赋值方式

在yaml直接配置数据：

person:
  name: lina
  age: 22
  happy: flase
  birth: 1999/05/05
  maps: {k1: v1,k2: v2}
  lists:
    -code
    -music
    -sleep
  dog:
    name: 布丁
    age: 1

可以通过这个配置产生提示

@ConfigurationProperties

  1. Dog

package com.na.pojo;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;


@Component
public class Dog {
    private String name;
    private String age;

    public Dog() {
    }

    public Dog(String name, String age) {
        this.name = name;
        this.age = age;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getAge() {
        return age;
    }

    public void setAge(String age) {
        this.age = age;
    }

    @Override
    public String toString() {
        return "Dog{" +
                "namel='" + name + '\'' +
                ", age='" + age + '\'' +
                '}';
    }
}
  1. Person
package com.na.pojo;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.stereotype.Component;

import java.util.Date;
import java.util.List;
import java.util.Map;


/*
@ConfigurationProperties作用：
将配置文件中配置每一个属性的值，映射到这个组件中；
告诉SpringBoot将本类中的所有属性和配置文件进行绑定
参数 prefix = "person" : 将配置文件中的person下面的所有属性一一对应

只有这个组件是容器中的组件，才能使用容器提供@ConfigurationProperties功能
 */
@Component //注册bean
@ConfigurationProperties(prefix = "person")
public class Person {

    private String name;
    private String age;
    private String happy;
    private Date birth;
    private Map<String,Object>maps;
    private List<Object> lists;
    private Dog dog;

    public Person() {
    }

    public Person(String name, String age, String happy, Date birth, Map<String, Object> maps, List<Object> lists, Dog dog) {
        this.name = name;
        this.age = age;
        this.happy = happy;
        this.birth = birth;
        this.maps = maps;
        this.lists = lists;
        this.dog = dog;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getAge() {
        return age;
    }

    public void setAge(String age) {
        this.age = age;
    }

    public String getHappy() {
        return happy;
    }

    public void setHappy(String happy) {
        this.happy = happy;
    }

    public Date getBirth() {
        return birth;
    }

    public void setBirth(Date birth) {
        this.birth = birth;
    }

    public Map<String, Object> getMaps() {
        return maps;
    }

    public void setMaps(Map<String, Object> maps) {
        this.maps = maps;
    }

    public List<Object> getLists() {
        return lists;
    }

    public void setLists(List<Object> lists) {
        this.lists = lists;
    }

    public Dog getDog() {
        return dog;
    }

    public void setDog(Dog dog) {
        this.dog = dog;
    }

    @Override
    public String toString() {
        return "Person{" +
                "name='" + name + '\'' +
                ", age='" + age + '\'' +
                ", happy='" + happy + '\'' +
                ", birth=" + birth +
                ", maps=" + maps +
                ", lists=" + lists +
                ", dog=" + dog +
                '}';
    }
}
  1. test
package com.na;

import com.na.pojo.Dog;
import com.na.pojo.Person;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.boot.test.context.SpringBootTest;

@SpringBootTest
class Springboot01HelloworldApplicationTests {

    @Autowired
    private Person person;
    @Test
    void contextLoads() {
        System.out.println(person);

    }

}

第二种赋值方式

在.properties中赋值

name=lina

1.Person


package com.na.pojo;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.PropertySource;
import org.springframework.stereotype.Component;

import java.util.Date;
import java.util.List;
import java.util.Map;

@Component //注册bean
//@ConfigurationProperties(prefix = "person")
@PropertySource(value = "classpath:application.properties")
public class Person {

    //SPEL表达式取出配置文件的值
    @Value("${name}")
    private String name;
    private String age;
    private String happy;
    private Date birth;
    private Map<String,Object>maps;
    private List<Object> lists;
    private Dog dog;

    public Person() {
    }

    public Person(String name, String age, String happy, Date birth, Map<String, Object> maps, List<Object> lists, Dog dog) {
        this.name = name;
        this.age = age;
        this.happy = happy;
        this.birth = birth;
        this.maps = maps;
        this.lists = lists;
        this.dog = dog;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getAge() {
        return age;
    }

    public void setAge(String age) {
        this.age = age;
    }

    public String getHappy() {
        return happy;
    }

    public void setHappy(String happy) {
        this.happy = happy;
    }

    public Date getBirth() {
        return birth;
    }

    public void setBirth(Date birth) {
        this.birth = birth;
    }

    public Map<String, Object> getMaps() {
        return maps;
    }

    public void setMaps(Map<String, Object> maps) {
        this.maps = maps;
    }

    public List<Object> getLists() {
        return lists;
    }

    public void setLists(List<Object> lists) {
        this.lists = lists;
    }

    public Dog getDog() {
        return dog;
    }

    public void setDog(Dog dog) {
        this.dog = dog;
    }

    @Override
    public String toString() {
        return "Person{" +
                "name='" + name + '\'' +
                ", age='" + age + '\'' +
                ", happy='" + happy + '\'' +
                ", birth=" + birth +
                ", maps=" + maps +
                ", lists=" + lists +
                ", dog=" + dog +
                '}';
    }
}

2.test

package com.na;

import com.na.pojo.Dog;
import com.na.pojo.Person;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.boot.test.context.SpringBootTest;

@SpringBootTest
class Springboot01HelloworldApplicationTests {

    @Autowired
    private Person person;
    @Test
    void contextLoads() {
        System.out.println(person);

    }

}

多环境配置以及配置文件位置

文件位置

  1. file:./config/
  2. file:./
  3. classpath:/config/
  4. classpath:/

多环境配置

"—"来分割

server:
  port: 8081

---
server:
  port: 8082
spring:
  profiles: dev

  
---
server:
  port: 8083

---
server:
  port: 8084

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