Springboot自定义Starter插件

 

1.建立maven项目。

2导入springboot的autoconfigure插件及springboot-parent。

    4.0.0

    com.byhoo
    token-redis-springboot-starter
    1.0-SNAPSHOT
    
    
        org.springframework.boot
        spring-boot-starter-parent
        2.0.0.RELEASE
    
    

        
        
            org.springframework.boot
            spring-boot-autoconfigure
            2.2.1.RELEASE
        
        
        
            org.springframework.boot
            spring-boot-configuration-processor
            true
        
    

3.编写TokenProperties文件用来读取配置文件信息

package com.bayhoo.utils;

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

/**
 * Created by lenovo on 2019/12/3.
 */

@ConfigurationProperties(prefix = "bayhoo")
public class TokenProperties {
    private String tokenRedisHost;
    private String tokenRedisPwd;

    /*
     配置文件中 配置文件中key没有打写,都是小写
        tokenRedisHost = token-redis-host
     */
    public void setTokenRedisHost(String tokenRedisHost) {
        this.tokenRedisHost = tokenRedisHost;
    }

    public void setTokenRedisPwd(String tokenRedisPwd) {
        this.tokenRedisPwd = tokenRedisPwd;
    }

    public String getTokenRedisHost() {
        return tokenRedisHost;
    }

    public String getTokenRedisPwd() {
        return tokenRedisPwd;
    }
}

@ConfigurationProperties 配置属性  prefix参数为属性前缀昵称

4.创建服务层用来测试TokenService

package com.bayhoo.service;

        import com.bayhoo.utils.TokenProperties;
        import org.springframework.beans.factory.annotation.Autowired;

/**
 * Created by lenovo on 2019/12/3.
 */

public class TokenService {
    @Autowired
    private TokenProperties tokenProperties;
    public String getToken(){
        return tokenProperties.getTokenRedisHost()+"，"+tokenProperties.getTokenRedisPwd();
    }

}

5.创建自动配置类TokenAutoConfiguration

package com.bayhoo.config;

import com.bayhoo.service.TokenService;
import com.bayhoo.utils.TokenProperties;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

/**
 * Created by lenovo on 2019/12/3.
 */
@Configuration
@EnableConfigurationProperties(TokenProperties.class)
public class TokenAutoConfiguration {

    @Bean
    public TokenService tokenService(){
        return new TokenService();
    }
}

• @Configuration：表明此类是一个配置类，将变为一个bean被spring进行管理。
• @EnableConfigurationProperties：启用属性配置，将读取HelloServiceProperties里面的属性。
• @bean:作用之一就是能够管理第三方jar包内的类到容器中

6.在resources文件夹下面新建一个META-INF文件，并在下面创建spring.factories文件，将配置类(TokenAutoConfiguration)注入到IOC容器中。

org.springframework.boot.autoconfigure.EnableAutoConfiguration=com.bayhoo.config.TokenAutoConfiguration

到现在我们的token-redis-springboot-starter 就编写完成啦，由于我们的springboot-starter插件是自定义的，所以正确命名应该为xxx-spring-boot-starter 然后在执行 mvn clean install 将我们的springboot-starter打入maven库。

 

7.新建一个项目，在pom包中引入我们的token-redis-springboot-starter 

           com.byhoo
           token-redis-springboot-starter
           1.0-SNAPSHOT

8.在application.yml添加我们自己的属性

bayhoo:
  token-redis-pwd: 123456
  token-redis-host: 127.0.0.1

9.在启动类上编写接口

package com.bayhoo;

import ch.qos.logback.core.net.SyslogOutputStream;
import com.bayhoo.service.TokenService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.web.bind.annotation.RequestAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

/**
 * Created by lenovo on 2019/12/5.
 */
@SpringBootApplication
@RestController
public class SpringbootApplication {

    @Autowired
    private TokenService tokenService;

    @RequestMapping("/userName")
    public String userName(){

        return tokenService.getToken();
    }

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

}

 启动springboot项目就可以啦