SpringBoot中自定义Stater

自定义Stater

1. 构建第一个Module

目录结构：

代码：

最底层的配置类：

package com.itheima.springbootconfig;

public class MakyRedis {

    String name = "" ;
    int id = 20;

    public MakyRedis() {
    }

    public MakyRedis(String name, int id) {
        this.name = name;
        this.id = id;
        System.out.println(name+""+id);
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }


}
//=========================================================================================================
package com.itheima.springbootconfig;


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

@ConfigurationProperties(prefix = "maky")
public class RdisConfiguraProperties {

    String name = "local";
    int id = 10;

    public RdisConfiguraProperties() {
    }

    public RdisConfiguraProperties(String name, int id) {
        this.name = name;
        this.id = id;

    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }
}
//======================================================================================================
package com.itheima.springbootconfig;


import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
@EnableConfigurationProperties(RdisConfiguraProperties.class)
public class RedisConfiguration {

    @Autowired
    private  RdisConfiguraProperties maky;

    @Bean
    public MakyRedis getRedis() {

        return new MakyRedis(maky.getName(),maky.getId());
    }
}
//======================================================================================================
================ pom文件：=================

	org.springframework.boot
	spring-boot-configuration-processor
	true

Resources目录下要定义META-INF/spring.factories文件，为了让springboot启动时自动加载该文件，从而能够实现自动配置

org.springframework.boot.autoconfigure.EnableAutoConfiguration=\
  com.itheima.springbootconfig.RedisConfiguration

2. 构建第二个Module

该module只负责将第一个module的项目id引入到pom配置文件中，视为starter

	com.itheima
	springboot-config
	0.0.1-SNAPSHOT

4. 构建第三个Module

该module负责调用自定义的starter

1、首先在该module的pom文件中引入第二个项目的id

2、调用方法

	com.itheima
	springboot-starter
	0.0.1-SNAPSHOT

package com.itheima.springbootenable;

import com.itheima.springbootconfig.RedisConfiguration;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.ConfigurableApplicationContext;


@SpringBootApplication
public class SpringbootEnableApplication {

	public static void main(String[] args) {
		ConfigurableApplicationContext run = SpringApplication.run(SpringbootEnableApplication.class, args);
		RedisConfiguration bean = run.getBean(RedisConfiguration.class);
		System.out.println(bean.getRedis());

	}
}

 可以通过修改该module中的配置文件application.properties(yml) 来指定第一个module中被该注解指定的前缀为maky的值

@ConfigurationProperties(prefix = "maky")

示例：
maky.name=Maky
maky.id=18

目录结构：