SpringBoot配置文件之properties和yml的使用

# 配置项⽬端⼝号
server.port=8080
#配置数据库连接信息
spring.datasource.url=jdbc:mysql://127.0.0.1:3306/testdb?
characterEncoding=utf8&useSSL=false
spring.datasource.username=root
spring.datasource.password=root

mykey.key1 = bite

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

@RestController
public class PropertiesController {
    @Value("${mykey.key1}")
    private String key1;

    @RequestMapping("/key")
    public String key(){
      return "读取到值:"+key1;
 }
}

spring:
 datasource:
  url: jdbc:mysql://127.0.0.0:3306/dbname?characterEncoding=utf8&useSSL=false
  username: root
  password: root

string:
 hello: bite

@RestController
public class ReadYml {
  @Value("${string.hello}")
  private String hello;

  @RequestMapping("/ymlKey")
  public String key(){
     return "读取到值:"+hello;
  }
}

#以下格式不代表yml文件格式，只是作为说明

# 字符串
string.value: Hello
  
# 布尔值，true或false
boolean.value: true
boolean.value1: false

# 整数
int.value: 10

# 浮点数
float.value: 3.14159

# Null，~代表null
null.value: ~

# "" 空字符串
# 直接后⾯什么都不加就可以了, 但这种⽅式不直观, 更多的表示是使⽤引号括起来
empty.value: ''

student:
 id: 1
 name: Java
 age: 18


#或者可以采用行内写法
student: {id: 1,name: Java,age: 18}

import lombok.Data;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.stereotype.Component;
@ConfigurationProperties(prefix = "student")
@Component
@Data
public class Student {
 private int id;
 private String name;
 private int age;
}

@RestController
public class StudentController {

 @Autowired
 private Student student;
 
 @RequestMapping("/readStudent")
 public String readStudent(){
     return student.toString();
 }
}

dbtypes:
 name:
  - mysql
  - sqlserver
  - db2

@Component
@ConfigurationProperties("dbtypes")
@Data
public class ListConfig {
  private List<String> name;
}

@RestController
public class ReadYml2 {

 @Autowired
 private ListConfig listConfig;

 @RequestMapping("/readList")
 public String readList(){
    return listConfig.toString();
 }
}

maptypes:
 map:
  k1: kk1
  k2: kk2
  k3: kk3

@Component
@ConfigurationProperties("maptypes")
@Data
public class MapConfig {
 private HashMap<String,String> map;
}

@RestController
public class ReadYml2 {

 @Autowired
 private MapConfig mapConfig;

 @RequestMapping("/readMap")
 public String readStudent(){
   return mapConfig.toString();
 }
}