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思路

创建模块，封装starter，最后使用starter.

1 - 创建一个Demo Project，模拟一个需要被封装的DemoModule模块，其中核心方法为exeModuleMethod
2 - 通过starter封装可以直接初始化DemoModule的实例到Spring容器
3 - 在Maven中引入starter，且在yml中配置相应到参数即可直接初始化DemoModule的实例
4 - 在应用中注入DemoModule即可使用其exeModuleMethod方法#

新建项目
pom.xml

<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd"><modelVersion>4.0.0</modelVersion><parent><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>2.1.7.RELEASE</version><relativePath/> <!-- lookup parent from repository --></parent><groupId>com.pdai</groupId><artifactId>demo</artifactId><version>0.0.1-SNAPSHOT</version><name>demo</name><description>Demo project for Spring Boot</description><properties><java.version>1.8</java.version></properties><dependencies><!-- 注意不要引入Springboot模块--></dependencies><build></build></project>

创建一个测试模块

/****/
public class DemoModule {private String version;private String name;public String exeModuleMethod() {return "Demo module, name = " + name + ", version = " + version;}public String getVersion() {return version;}public void setVersion(String version) {this.version = version;}public String getName() {return name;}public void setName(String name) {this.name = name;}
}

install

封装Starter

创建项目 - pom.xml

<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd"><modelVersion>4.0.0</modelVersion><parent><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>2.1.7.RELEASE</version><relativePath/> <!-- lookup parent from repository --></parent><groupId>com.pdai</groupId><artifactId>demo-springboot-starter</artifactId><version>0.0.1-SNAPSHOT</version><name>demo-springboot-starter</name><description>Demo project for Spring Boot</description><properties><java.version>1.8</java.version></properties><dependencies><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-autoconfigure</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-configuration-processor</artifactId><optional>true</optional></dependency><dependency><groupId>com.pdai</groupId><artifactId>demo</artifactId><version>0.0.1-SNAPSHOT</version></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-test</artifactId><scope>test</scope></dependency></dependencies></project>

Properties

import org.springframework.boot.context.properties.ConfigurationProperties;@ConfigurationProperties(prefix = "com.pdai")
public class DemoProperties {private String version;private String name;public String getVersion() {return version;}public void setVersion(String version) {this.version = version;}public String getName() {return name;}public void setName(String name) {this.name = name;}
}

AutoConfiguration

import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;@Configuration
@EnableConfigurationProperties(DemoProperties.class)
public class DemoAutoConfiguration {@Beanpublic com.pdai.demo.module.DemoModule demoModule(DemoProperties properties){com.pdai.demo.module.DemoModule demoModule = new com.pdai.demo.module.DemoModule();demoModule.setName(properties.getName());demoModule.setVersion(properties.getVersion());return demoModule;}
}

spring.factory

在META-INF下创建spring.factory文件

org.springframework.boot.autoconfigure.EnableAutoConfiguration=\
com.pdai.demospringbootstarter.DemoAutoConfiguration

install

使用starter

只需要在application.yml中application.ymlcom:

pdai:name: DEMOversion: v1

pom.xml

<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd"><modelVersion>4.0.0</modelVersion><parent><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>2.1.7.RELEASE</version><relativePath/> <!-- lookup parent from repository --></parent><groupId>com.pdai</groupId><artifactId>demo-usage</artifactId><version>0.0.1-SNAPSHOT</version><name>demo-usage</name><description>Demo starter usage</description><properties><java.version>1.8</java.version></properties><dependencies><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><dependency><groupId>com.pdai</groupId><artifactId>demo-springboot-starter</artifactId><version>0.0.1-SNAPSHOT</version></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-test</artifactId><scope>test</scope></dependency></dependencies><build><plugins><plugin><groupId>org.springframework.boot</groupId><artifactId>spring-boot-maven-plugin</artifactId></plugin></plugins></build></project>

app

import com.pdai.demo.module.DemoModule;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;@SpringBootApplication
@RestController
public class DemoUsageApplication {public static void main(String[] args) {SpringApplication.run(DemoUsageApplication.class, args);}@Autowiredprivate DemoModule demoModule;@GetMapping("demo")public String demo(){return demoModule.exeModuleMethod();}
}

输出

http://localhost:8080/demo

Demo module, name = DEMO, version = v1