技術標籤：Springboot

[email protected]註解

properties檔案新增student屬性，使用時用@Value("${變數}")

server.port=8081
spring.datasource.username=root
spring.datasource.password=talent
spring.datasource.url=jdbc:mysql://localhost:3306/mybatis?useUnicode=true&characterEncoding=utf-8&useSSL=true&serverTimezone=UTC
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
mybatis.configuration.log-impl: org.apache.ibatis.logging.stdout.StdOutImpl
mybatis.mapper-locations=classpath:mapping/*Mapping.xml

student.name=李磊
student.age=20
student.sex=男
student.school=中學
 

@Value("${student.name}")
    String name;
    @RequestMapping("getValue")
    public String getValue(){
        return name;

    }

[email protected]

@Value註解只能加一個變數上邊，如果有許多一個個加，比較繁瑣可以使用@ConfigurationProperties

使用方法：

1.加依賴

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-configuration-processor</artifactId>
    <optional>true</optional>
</dependency>
 

2實體類添加註解指定prefix

package com.demo.springlearn.entity;

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

@Data
@Component
@ConfigurationProperties(prefix = "student")
public class Student {
    String name;
    int age;
    String sex;
    String school;
}
 

3.自動配置後獲取值

@Autowired
    Student student;
    @RequestMapping("getStudent")
    public Student getStudent(){
        return student;

    }

配置檔案中文亂碼解決：

https://blog.csdn.net/wlh2015/article/details/84102068?utm_medium=distribute.pc_relevant.none-task-blog-BlogCommendFromMachineLearnPai2-2.control&depth_1-utm_source=distribute.pc_relevant.none-task-blog-BlogCommendFromMachineLearnPai2-2.control

Properties線上轉換yml格式網址：

https://www.toyaml.com/index.html