制作SpringBoot Starter

 

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>2.7.1</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.charkey</groupId>
    <artifactId>digest-spring-boot-starter</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>digest-spring-boot-starter</name>
    <description>digest-spring-boot-starter</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-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>commons-codec</groupId>
            <artifactId>commons-codec</artifactId>
            <version>1.15</version>
        </dependency>
    </dependencies>

    <build>
        <plugins>
<!--            <plugin>-->
<!--                <groupId>org.springframework.boot</groupId>-->
<!--                <artifactId>spring-boot-maven-plugin</artifactId>-->
<!--            </plugin>-->
        </plugins>
    </build>

</project>

application.properties

spring.application.name=digest-spring-boot-starter
digest.type=sha

Digest.java

package com.charkey.digest;

public interface Digest {

    String digest(String raw);
}

Md5Digest.java

package com.charkey.digest.impl;

import com.charkey.digest.Digest;
import org.apache.commons.codec.digest.DigestUtils;

public class Md5Digest implements Digest {
    @Override
    public String digest(String raw) {
        System.out.println("使用MD5生成。。。");
        return DigestUtils.md2Hex(raw);
    }
}

ShaDigest.java

package com.charkey.digest.impl;

import com.charkey.digest.Digest;
import org.apache.commons.codec.digest.DigestUtils;

public class ShaDigest implements Digest {
    @Override
    public String digest(String raw) {
        System.out.println("使用SHA生成。。。");
        return DigestUtils.sha1Hex(raw);
    }
}

Settings.java

package com.charkey.digest.conf;

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

@Component
@ConfigurationProperties(prefix = "digest")
public class Settings {

    private String type;

    public String getType() {
        return type;
    }

    public void setType(String type) {
        this.type = type;
    }
}

Config.java

package com.charkey.digest.conf;

import com.charkey.digest.Digest;
import com.charkey.digest.impl.Md5Digest;
import com.charkey.digest.impl.ShaDigest;
import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
@EnableConfigurationProperties(Settings.class)
public class Config {

    @Bean
    @ConditionalOnProperty(prefix = "digest",name = "type",havingValue = "md5")
    public Digest md5Digest(){
        System.out.println("MD5 Config init loading ...");
        return new Md5Digest();
    }

    @Bean
    @ConditionalOnProperty(prefix = "digest",name = "type",havingValue = "sha")
    public Digest shaDigest(){
        System.out.println("SHA Config init loading ...");
        return new ShaDigest();
    }
}

DigestSpringBootStarterApplication.java

package com.charkey.digest;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class DigestSpringBootStarterApplication {

    public static void main(String[] args) {
        SpringApplication.run(DigestSpringBootStarterApplication.class, args);
    }
  }
}

创建 resources/META-INF/spring.factories

org.springframework.boot.autoconfigure.EnableAutoConfiguration=com.charkey.digest.conf.Config

 

 

 

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