springboot自定义starter

1，创建一个空工程  new -  project - emptyproject

2，new一个Modules  ---------------- maven （启动器） ：

springboottest-spring-boot-starter

3，new一个Modules  ---------------- spring（做自动配置的）：

springboottest-spring-boot-starter-autoconfigurer   spring版本：1.5.10

4，启动器pom文件中引入自动配置模块：

    <!--启动器-->
     <dependencies>
         <!--引入自动配置模块-->
          <dependency>
              <groupId>com.springboottest.starter</groupId>
              <artifactId>springboottest-spring-boot-starter-autoconfigurer</artifactId>
              <version>0.0.1-SNAPSHOT</version>
          </dependency>
     </dependencies>

5，自动配置器中，删除主主程序等不需要的内容,以及项目的启动类。并编写启动器：

1. pom文件中引入启动器（所有starter的基本配置）：

   <dependencies>
           <!--引入spring-boot-starter-->
           <dependency>
               <groupId>org.springframework.boot</groupId>
               <artifactId>spring-boot-starter</artifactId>
           </dependency>
   
       </dependencies>

2. 编写会被调用的service

3. package com.springboottest.starter;
   
   import org.springframework.boot.context.properties.ConfigurationProperties;
   
   //绑定文件中所有以springboottest.hello 开始的配置
   @ConfigurationProperties(prefix = "springboottest.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.springboottest.starter;
   
   public class HelloService {
      HelloProperties helloProperties;
   
       public HelloProperties getHelloProperties() {
           return helloProperties;
       }
   
       public void setHelloProperties(HelloProperties helloProperties) {
           this.helloProperties = helloProperties;
       }
   
       public  String sayHello(String name){
         return  helloProperties.getPrefix()+"-"+ name + helloProperties.getSuffix();
       };
   }

   package com.springboottest.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)//让属性生效 HelloProperties helloProperties;
   public class HelloServiceAutoConfiguration {
   
       //让属性生效 HelloProperties helloProperties;
       @Autowired
       HelloProperties helloProperties;
       @Bean
       public  HelloService helloService(){
           HelloService service = new HelloService();
           service.setHelloProperties(helloProperties);
           return  service;
       }
   
   }

4. 配置spring.factories让自动配置类生效

   org.springframework.boot.autoconfigure.EnableAutoConfiguration=\
   com.springboottest.starter.HelloServiceAutoConfiguration

5. springboottest-spring-boot-starter  启动器编写完成
6. 两个项目分别install
7. 加载完成，现在可以在别的项目里面调用

6，新建项目，调用自定义启动器的方法

1. pom文件引入自定义启动器

   <!--引入自定义starter-->
           <dependency>
               <groupId>com.springboottest.starter</groupId>
               <artifactId>springboottest-spring-boot-starter</artifactId>
               <version>1.0-SNAPSHOT</version>
           </dependency>

2. 按照规则编写properties，增加前后缀

   springboottest.hello.prefix=SPRINGBOOT
   springboottest.hello.suffix=HELLO WORLD

3. 调用方法