# key與=與value之間不要加空格
key=value

server.port=8088

# 配置數(shù)據(jù)庫 URL
spring.datasource.url="jdbc:mysql://127.0.0.1:3306/tr?characterEncoding=utf8&useSSL=false"
# 配置數(shù)據(jù)庫 username
spring.datasource.name="root"
# 配置數(shù)據(jù)庫 password
spring.datasource.password="111111"
# 設(shè)置驅(qū)動
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver

# 用戶自定義配置
custom.name=zhangsan
custom.id=666

// 要注意${}不能省略
@Value("${配置信息key}")
private String name;

package com.example.springboot.controller;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
@Controller
@ResponseBody
public class TestController2 {
    // 自定義配置和系統(tǒng)配置都可以讀取
    @Value("${custom.name}")
    private String name;
    @Value("${custom.id}")
    private String id;
    @Value("${server.port}")
    private String port;
    @RequestMapping("/coustom")
    public String sayHi() {
        return "name : " + name + " "
                + "id : " + id + " "
                + "port : " + port;
    }
}

# :后面空格一定不能省
key: value

# 配置端口
server:
  port: 8088
# 配置數(shù)據(jù)庫
spring:
  datasource:
    url: "jdbc:mysql://127.0.0.1:3306/tr?characterEncoding=utf8&useSSL=false"
    username: "root"
    password: "111111"
# 自定義配置信息
custom:
  name: zhangsan
  id: 666

string:
 str1: Hello \n Spring Boot.
 str2: 'Hello \n Spring Boot.'
 str3: "Hello \n Spring Boot."

@Controller
public class YmlString {
    @Value("${string.str1}")
    private String str1;
    @Value("${string.str2}")
    private String str2;
    @Value("${string.str3}")
    private String str3;
    @PostConstruct
     public void postConstruct() {
         System.out.println("string.str1：" + str1);
         System.out.println("string.str2：" + str2);
         System.out.println("string.str3：" + str3);
     }
}

# 字符串
string.value: Hello
# 布爾值，true或false
boolean.value: true
boolean.value1: false
# 整數(shù)
int.value: 10
int.value1: 0b1010_0111_0100_1010_1110 # ?進(jìn)制
# 浮點數(shù)
float.value: 3.14159
float.value1: 314159e-5 # 科學(xué)計數(shù)法
# Null，~代表null
null.value: ~

package com.example.springboot.controller;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;
import javax.annotation.PostConstruct;
@Component
public class TestController3 {
    @Value("${string.value}")
    private String str;
    @Value("${boolean.value}")
    private boolean bool;
    @Value("${float.value}")
    private float flo;
    @Value("${null.value}")
    private Integer nul;
    @PostConstruct
    public void postConsrtuct() {
        System.out.println("str: " + str);
        System.out.println("bool: " + bool);
        System.out.println("flo: " + flo);
        System.out.println("nul: " + nul);
    }
}

student:
  id: 1
  name: 張三
  age: 18

student: {id: 1,name: 張三,age: 18}

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

package com.example.springboot.controller;
import com.example.springboot.model.Student;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import javax.annotation.PostConstruct;
@Controller
public class ConfigController {
    @Autowired
    private Student student;
    @PostConstruct
    public void postConsrtuct() {
        System.out.println(student);
    }
}

dbtypes:
	name:
		- mysql
		- sqlserver
		- db2

dbtypes: {name: [mysql, sqlserver, db2]}

import lombok.Data;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.stereotype.Component;
import java.util.List;
@Data
@ConfigurationProperties(prefix = "dbtypes")
@Component
public class ConfigList {
    private List<String> name;
}

package com.example.springboot.controller;
import com.example.springboot.model.ConfigList;
import org.springframework.stereotype.Controller;
import javax.annotation.PostConstruct;
import javax.annotation.Resource;
@Controller
public class ConfigController {
    @Resource
    private ConfigList configList;
    @PostConstruct
    public void postConstruct() {
    	System.out.println(configList.getName());
    }
}

tes:
  map:
    1: 張三
    2: 李四

tes:
  maps: {1: 張三,2: 李四}

package com.example.springboot.model;
import lombok.Data;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.stereotype.Component;
import java.util.Map;
@Data
@ConfigurationProperties(prefix = "tes")
@Component
public class ConfigMap {
    private Map<Integer, String> map;
}

package com.example.springboot.controller;
import com.example.springboot.model.ConfigMap;
import org.springframework.stereotype.Controller;
import javax.annotation.PostConstruct;
import javax.annotation.Resource;
@Controller
public class ConfigController2 {
    @Resource
    private ConfigMap configMap;
    @PostConstruct
    public void postConstruct() {
        System.out.println(configMap.toString());
    }
}

# 指定運行環(huán)境為測試環(huán)境(application.properties)
spring.profiles.active=test
# 指定運行環(huán)境為生產(chǎn)環(huán)境(application.xml)
spring:
  profiles:
    active: pord

java -jar xxx.jar --spring.profiles.active=test