SpringBoot配置的文件名是固定的：application.yml application.properties
YAML:以数据为中心 比Json xml更适合做配置文件
YAML语法:
1 字面量:普通值(字符串 布尔值 数字)
(1) k: v
(2) " "不会转义 ' '会转义
2 对象，map(属性和值)
(1) k: v
(2) 在下一行 写对象的属性和值
数组(List,set)
用 - 表示数组中的一个元素
行内写法
properties配置文件容易乱码 需要在设置中找到这个然后调成这样
示例1(在yml文件中配置):
application.yaml文件中配置
Person:
name: 张三
age: 21
boss: true
birth: 2022/12/5
maps: {key1: value1,key2: value2}
list: [dog,cat,pig]Person类中利用ConfigurationProperties(prefix=" ")引入配置类中的元素 但是注意Person类中的类的名字必须与application.yaml中一致
package com.qcby.model;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.stereotype.Component;
import java.util.Date;
import java.util.List;
import java.util.Map;
@Component
@ConfigurationProperties(prefix = "person")
public class Person {
private String name;
private Integer age;
private boolean boss;
private Date birth;
private Map<String,String> maps;
private List<String> list;
public Person() {
}
public Person(String name, Integer age, boolean boss, Date birth, Map<String, String> maps, List<String> list) {
this.name = name;
this.age = age;
this.boss = boss;
this.birth = birth;
this.maps = maps;
this.list = list;
}
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 boolean isBoss() {
return boss;
}
public void setBoss(boolean boss) {
this.boss = boss;
}
public Date getBirth() {
return birth;
}
public void setBirth(Date birth) {
this.birth = birth;
}
public Map<String, String> getMaps() {
return maps;
}
public void setMaps(Map<String, String> maps) {
this.maps = maps;
}
public List<String> getList() {
return list;
}
public void setList(List<String> list) {
this.list = list;
}
@Override
public String toString() {
return "Person{" +
"name='" + name + '\'' +
", age=" + age +
", boss=" + boss +
", birth=" + birth +
", maps=" + maps +
", list=" + list +
'}';
}
}
最终在Test包下进行测试
@RunWith(SpringRunner.class) //声明为测试单元
@SpringBootTest //读取配置
public class SpringBoot01ApplicationTests {
@Autowired
Person person;
@Test
public void Context(){
System.out.println(person);
}
}示例2(在properties文件中配置)
在application.properties中
person.email=lucky
person.hello=junit
person.lastName=jiangjiayi
person.age=12
person.boss=true
person.list=dog,cat
person.maps.key1=value1
person.maps.key2=value2
person.dog.name=${person.hello} //${} 可以理解为Vue中的{{}} 调用的是上面的person.hello的值
person.dog.age=16Person类
package com.qcby.model;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.stereotype.Component;
import javax.validation.constraints.Email;
import java.util.Date;
import java.util.List;
import java.util.Map;
@Component
@ConfigurationProperties(prefix = "person")
public class Person {
String email;
String hello;
String lastName;
int age;
boolean boss;
List<String> list;
Map<String,String>maps;
Dog dog;
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public String getHello() {
return hello;
}
public void setHello(String hello) {
this.hello = hello;
}
public String getLastName() {
return lastName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
public boolean isBoss() {
return boss;
}
public void setBoss(boolean boss) {
this.boss = boss;
}
public List<String> getList() {
return list;
}
public void setList(List<String> list) {
this.list = list;
}
public Map<String, String> getMaps() {
return maps;
}
public void setMaps(Map<String, String> maps) {
this.maps = maps;
}
public Dog getDog() {
return dog;
}
public void setDog(Dog dog) {
this.dog = dog;
}
@Override
public String toString() {
return "Person{" +
"email='" + email + '\'' +
", hello='" + hello + '\'' +
", lastName='" + lastName + '\'' +
", age=" + age +
", boss=" + boss +
", list=" + list +
", maps=" + maps +
", dog=" + dog +
'}';
}
}
Dog类
package com.qcby.model;
public class Dog {
String name;
int age;
public Dog() {
}
public Dog(String name, int age) {
this.name = name;
this.age = age;
}
@Override
public String toString() {
return "Dog{" +
"name='" + name + '\'' +
", age=" + age +
'}';
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
}
测试类
@RunWith(SpringRunner.class) //声明为测试单元
@SpringBootTest //读取配置
public class SpringBoot01ApplicationTests {
@Autowired
Person person;
@Test
public void Context(){
System.out.println(person);
}
}如果不是标准的application.properties 是其他的Person类中需要用PropertySource来添加配置文件的路径
@ImportSource
导入Spring的配置文件，让配置文件里面的内容生效；Spring Boot里面没有Spring的配置文件，我们自己编写的配置文件，也不能自动识别；想让Spring的配置文件生效，加载进来；@ImportResource标注在一个配置类上
SpringBoot推荐给容器中添加组件的方式；推荐使用全注解的方式
1、配置类@Configuration------>Spring配置文件
2、使用@Bean给容器中添加组件，将方法的返回值添加到容器中 容器中这个组件的默认ID就是方法名
生成随机数：
${random.value}、${random.int}、${random.long}
${random.int(10)}、${random.int[1024,65536]}
多profile文件
通过spring:
profiles:
active: 来决定运行谁
配置文件加载位置的优先级
–file:./config/
–file:./
–classpath:/config/
–classpath:/
优先级由高到底，高优先级的配置会覆盖低优先级的配置；
