【定制化体验：使用Spring Boot自动配置，打造个性化Starter】-编程知识

【定制化体验：使用Spring Boot自动配置，打造个性化Starter】

项目结构

在这里插入图片描述

Pom

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"><modelVersion>4.0.0</modelVersion><groupId>com.custom</groupId><artifactId>spring-boot-starter-custom</artifactId><version>0.1-SNAPSHOT</version><packaging>jar</packaging><description>封装一个简单User组件</description><properties><maven.compiler.source>8</maven.compiler.source><maven.compiler.target>8</maven.compiler.target></properties><dependencies><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter</artifactId><version>2.5.8</version></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-autoconfigure</artifactId><version>2.5.8</version></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-configuration-processor</artifactId><version>2.5.8</version></dependency></dependencies>
</project>

spring.factories 注意书写格式

# Auto Configure
org.springframework.boot.autoconfigure.EnableAutoConfiguration=\
com.custom.config.UserAutoConfiguration

UserService （最后注入成bean）

public class UserService {private String name;private String age;private Long id;public String getName() {return name;}public void setName(String name) {this.name = name;}public String getAge() {return age;}public void setAge(String age) {this.age = age;}public Long getId() {return id;}public void setId(Long id) {this.id = id;}public void pint() {System.out.println(String.format("获取的数据用户名：%s----密码：%s----id:%s", name, age, id));}
}

UserProperties （用户配置）

@ConfigurationProperties(prefix = "song.user")
public class UserProperties {private String start;private String name;private String age;private Long id;public String getName() {return name;}public void setName(String name) {this.name = name;}public String getAge() {return age;}public void setAge(String age) {this.age = age;}public Long getId() {return id;}public void setId(Long id) {this.id = id;}public String getStart() {return start;}public void setStart(String start) {this.start = start;}
}

最关键的配置自动配置类一定要看注释

/*** 功能描述： 自动配置类** @author Songxianyang* @date 2024-04-26 13:40*/
@Configuration
// yaml档中song.user.start 有没有  如果没有则无法自动配置改类
@ConditionalOnProperty(prefix = "song.user", name = {"start"})
// 把yml配置的属性注入进来 然后使用它。启动自动配置属性
@EnableConfigurationProperties(UserProperties.class)
public class UserAutoConfiguration {@Beanpublic UserService userService(UserProperties userProperties) {UserService userService = new UserService();userService.setId(userProperties.getId());userService.setName(userProperties.getName());userService.setAge(userProperties.getAge());return userService;}
}