springboot 自定义starter模块

自定义starter需要三步走，定义对象类，定义配置类，定义META-INF下spring.factories文件，指定自动配置类

目录结构如下

 

 

1、定义对象类

package city.albert.entity;

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

/**
 * @author niunafei
 * @function
 * @email niunafei0315@163.com
 * @date 2020/6/30  10:26 AM
 *
 * 开启配置自动注入EnableConfigurationProperties
 * 引入配置属性 ConfigurationProperties
 *
 */
@EnableConfigurationProperties(SimpleBean.class)
@ConfigurationProperties(prefix = "simple")
public class SimpleBean {

    private Integer id;

    private String name;

    private Integer age;

    public Integer getId() {
        return id;
    }

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

    public String getName() {
        return name;
    }

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

    public Integer getAge() {
        return age;
    }

    public void setAge(Integer age) {
        this.age = age;
    }

    @Override
    public String toString() {
        return "SimpleBean{" +
                "id=" + id +
                ", name='" + name + '\'' +
                ", age=" + age +
                '}';
    }
}

 

2、定义配置类

package city.albert.config;

import city.albert.entity.SimpleBean;
import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

/**
 * @author niunafei
 * @function
 * @email niunafei0315@163.com
 * @date 2020/6/30  10:36 AM
 * @Configuration指定改类为配置类
 * @ConditionalOnClass指定该类加载条件为classspath下有指定的类，然后进行初始化
 */
@Configuration
@ConditionalOnClass(SimpleBean.class)
public class SimpleConfig {


    static {
        System.out.println("classLoader");
    }

    @Bean
    public SimpleBean simpleBean() {
        return new SimpleBean();
    }
}

 

3、定义META-INF下spring.factories文件

方式1、文件中指定自动配置类

org.springframework.boot.autoconfigure.EnableAutoConfiguration=city.albert.config.SimpleConfig

方式2、可以不定义上面文件使用Import注解也可以

 

 

4、使用

1、pom中引入包

   <dependency>
      <groupId>city.albert</groupId>
      <artifactId>zdy-spring-boot-starter</artifactId>
      <version>1.0-SNAPSHOT</version>
   </dependency>

 

2、添加配置注入属性

simple.id=20
simple.name=小明
simple.age=18

3、注入使用

@Autowired
private SimpleBean simpleBean;


@Test
void contextLoads() {
   //业务测试
   System.out.println(simpleBean);

}

 

 

SpringBoot单元测试与Idea热部署、读取配置文件