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自定义starter

starter：

? 1、这个场景需要使用到的依赖是什么？

? 2、如何编写自动配置

@Configuration  //指定这个类是一个配置类
@ConditionalOnXXX  //在指定条件成立的情况下自动配置类生效
@AutoConfigureAfter  //指定自动配置类的顺序
@Bean  //给容器中添加组件

@ConfigurationPropertie结合相关xxxProperties类来绑定相关的配置
@EnableConfigurationProperties //让xxxProperties生效加入到容器中

自动配置类要能加载
将需要启动就加载的自动配置类，配置在META-INF/spring.factories
org.springframework.boot.autoconfigure.EnableAutoConfiguration=org.springframework.boot.autoconfigure.admin.SpringApplicationAdminJmxAutoConfiguration,org.springframework.boot.autoconfigure.aop.AopAutoConfiguration,

? 3、模式：

启动器只用来做依赖导入；

专门来写一个自动配置模块；

启动器依赖自动配置；别人只需要引入启动器（starter）

mybatis-spring-boot-starter；自定义启动器名-spring-boot-starter

步骤：

1）、启动器模块

4.0.0com.maple.starter
    maple-spring-boot-starter
    1.0-SNAPSHOTcom.maple.starter
            maple-spring-boot-starter-autoconfigurer
            0.0.1-SNAPSHOT

2）、自动配置模块

4.0.0com.maple.starter
   maple-spring-boot-starter-autoconfigurer
   0.0.1-SNAPSHOTjarmaple-spring-boot-starter-autoconfigurerDemo project for Spring Bootorg.springframework.boot
      spring-boot-starter-parent
      1.5.10.RELEASEUTF-8UTF-81.8org.springframework.boot
         spring-boot-starter
      

package com.maple.starter;

import org.springframework.boot.context.properties.ConfigurationProperties;

@ConfigurationProperties(prefix = "maple.hello")
public class HelloProperties {

    private String prefix;
    private String suffix;

    public String getPrefix() {
        return prefix;
    }

    public void setPrefix(String prefix) {
        this.prefix = prefix;
    }

    public String getSuffix() {
        return suffix;
    }

    public void setSuffix(String suffix) {
        this.suffix = suffix;
    }
}

package com.maple.starter;

public class HelloService {

    HelloProperties helloProperties;

    public HelloProperties getHelloProperties() {
        return helloProperties;
    }

    public void setHelloProperties(HelloProperties helloProperties) {
        this.helloProperties = helloProperties;
    }

    public String sayHellmaple(String name){
        return helloProperties.getPrefix()+"-" +name + helloProperties.getSuffix();
    }
}

package com.maple.starter;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.autoconfigure.condition.ConditionalOnWebApplication;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
@ConditionalOnWebApplication //web应用才生效
@EnableConfigurationProperties(HelloProperties.class)
public class HelloServiceAutoConfiguration {

    @Autowired
    HelloProperties helloProperties;
    @Bean
    public HelloService helloService(){
        HelloService service = new HelloService();
        service.setHelloProperties(helloProperties);
        return service;
    }
}

SpringBoot自定义starter

标签：port   dep   repos   condition   基本配置   boot   config   ext   hot   

原文地址：https://www.cnblogs.com/junlinsky/p/13262404.html