#配置項(xiàng)目端口號(hào)
server.port=9090
#配置數(shù)據(jù)庫連接信息
spring.datasource.url=jdbc:mysql://localhost:3306/beantext?characterEncoding=utf-8&useSSL=false
#配置數(shù)據(jù)庫用戶名
spring.datasource.username=root
#配置數(shù)據(jù)庫密碼
spring.datasource.password=root
#配置數(shù)據(jù)庫驅(qū)動(dòng)
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver

my.text=hello world

package com.example.demo.controller;

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

@RequestMapping("/pro")
@RestController
public class PropertiesController {
    @Value("${my.text}")
    private String key;

    @RequestMapping("/text1")
    public String getValue() {
        return "獲取到的value為：" + key;
    }
}

my.text=你好 世界

spring: 
  datasource:
    url: jdbc:mysql://localhost:3306/beantext?characterEncoding=utf-8&useSSL=false
    username: root
    password: root
    driver-class-name: com.mysql.cj.jdbc.Driver

# 字符串
string.value: hello

# 布爾類型
boolean.value: true
boolean.value1: false

# 整數(shù)類型
int.value: 10

# 浮點(diǎn)數(shù)
float.value: 3.14159

# Null  ~ 代表null
null.value: ~


# "" 空字符串
# '' 單引號(hào)也表示空字符串
# 冒號(hào)后面什么都不加也可以表示空字符串。但這種方式不直觀，更多的表示是使用引號(hào)括起來
empty:
  value1: ''
  value2: ""
  value3:

package com.example.demo.controller;

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

@RequestMapping("/pro")
@RestController
public class PropertiesController {
    @Value("${string.value}")
    private String value;

    @Value("${boolean.value}")
    private Boolean value1;

    @Value("${boolean.value1}")
    private Boolean value2;

    @Value("${int.value}")
    private Integer value3;

    @Value("${float.value}")
    private Float value4;

    @Value("${null.value}")
    private String value5;



    @RequestMapping("/getValue")
    public String getValue() {
        return "獲取到的value為：" + value+" | "+value1+" | "+value2+" | "+value3+" | "+value4+" | "+value5;
    }
}

string:
  value1: Hello \n SpringBoot
  value2: 'Hello \n SpringBoot'
  value3: "Hello \n SpringBoot"

package com.example.demo.controller;

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

@RequestMapping("/pro")
@RestController
public class PropertiesController {

    @Value("${string.value1}")
    private String value1;

    @Value("${string.value2}")
    private String value2;

    @Value("${string.value3}")
    private String value3;

    @RequestMapping("/getValue")
    public String getValue() {
        System.out.println(value1);
        System.out.println(value2);
        System.out.println(value3);
        return "OK";
    }
}

#配置對象
student:
  name: '張三'
  age: 18

#行的形式
student1: {name: '張三', age: 18}

package com.example.demo.model;

import lombok.Data;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.stereotype.Component;

@Data
@Component
@ConfigurationProperties(prefix = "student")//prefix表示前綴
public class Student {
    private String name;
    private int age;
}

@Controller
public class PropertiesController {
    @Autowired
    private Student student;

    @PostConstruct
    public void getStudent() {
        System.out.println(student);
    }
}

type:
  list:
    - 'zhangsan'
    - 'lisi'
    - 'wangwu'

package com.example.demo.model;

import lombok.Data;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.stereotype.Component;

import java.util.List;

@Data
@Component
@ConfigurationProperties("type")
public class ListConfig {
    private List<String> list;

  }

   

@Controller
public class PropertiesController {

    @Autowired
    private ListConfig listConfig;

    @PostConstruct
    public void getList() {
        System.out.println(listConfig.toString());
    }
}

package com.example.demo.model;

import lombok.Data;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.stereotype.Component;

import java.util.Map;

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

package com.example.demo.controller;

import com.example.demo.model.ListConfig;
import com.example.demo.model.MapConfig;
import com.example.demo.model.Student;
import jakarta.annotation.PostConstruct;
import org.springframework.beans.factory.annotation.Autowired;
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.RestController;

@Controller
public class PropertiesController {

    @Autowired
    private MapConfig mapConfig;

    @PostConstruct
    public void getMap() {
        System.out.println(mapConfig);
    }
}