1 创建redis-spring-boot-autoconfigure模块

1.1 新建RedisProperties配置类

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

@ConfigurationProperties(prefix = "redis")
public class RedisProperties {
    
    

    private String host = "localhost";

    private int port = 6379;

    public String getHost() {
    
    
        return host;
    }

    public void setHost(String host) {
    
    
        this.host = host;
    }

    public int getPort() {
    
    
        return port;
    }

    public void setPort(int port) {
    
    
        this.port = port;
    }
}

1.2 新建RedisAutoConfiguration，注入bean

import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.context.annotation.Bean;
import redis.clients.jedis.Jedis;
import org.springframework.context.annotation.Configuration;

@Configuration
@EnableConfigurationProperties(RedisProperties.class)
@ConditionalOnClass(Jedis.class)
public class RedisAutoConfiguration {
    
    

    /**
     * 提供Jedis jedis
     * @return
     */
    @Bean
    @ConditionalOnMissingBean(name = "jedis")
    public Jedis jedis(RedisProperties redisProperties){
    
    
        System.out.println("RedisAutoConfiguration.......");
        return new Jedis(redisProperties.getHost(),redisProperties.getPort());
    }
}

1.3 新建spring.factories

• 路径为：resources\META-INF\spring.factories
• 内容如下：

org.springframework.boot.autoconfigure.EnableAutoConfiguration=com.yunfeng.redis.config.RedisAutoConfiguration

1.4 pom的依赖如下

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

        <!-- 引入jedis依赖 -->
        <dependency>
            <groupId>redis.clients</groupId>
            <artifactId>jedis</artifactId>
        </dependency>
    </dependencies>

2 创建redis-spring-boot-starter模块，并依赖redis-spring-boot-autoconfigure的模块

• 此模块只是包装作用，无需其他代码
• pom依赖如下：

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

        <!-- 引入配置模块 -->
        <dependency>
            <groupId>com.yunfeng</groupId>
            <artifactId>redis-spring-boot-autoconfigure</artifactId>
            <version>0.0.1-SNAPSHOT</version>
        </dependency>
    </dependencies>

3 新建测试模块，并引入自定义的redis-starter依赖，测试获取Jedis的Bean，并操作redis

3.1 测试模块的pom中引入自己定义的starter

	<!-- 引入自定义redis的starter -->
        <dependency>
            <groupId>com.example</groupId>
            <artifactId>redis-spring-boot-starter</artifactId>
            <version>0.0.1-SNAPSHOT</version>
        </dependency>

3.2 测试模块的启动类里测试

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.ConfigurableApplicationContext;
import org.springframework.context.annotation.Bean;
import redis.clients.jedis.Jedis;

@SpringBootApplication
public class SpringbootConditionApplication {
    
    

    public static void main(String[] args) {
    
    
        //启动Springboot的应用，返回Spring的IOC容器
        ConfigurableApplicationContext context = SpringApplication.run(SpringbootConditionApplication.class, args);

        Jedis jedis = context.getBean(Jedis.class);
        System.out.println(jedis);

        jedis.set("name","husiyuan");
        String name = jedis.get("name");
        System.out.println("name = " + name);
    }

    //若存在则不使用自定义starter中的Jedis
    @Bean
    public Jedis jedis(){
    
    
        return new Jedis("localhost",6379);
    }

}