Analysis of SpringBoot bottom annotation @Import

Entity class:

@Data
@ToString
@NoArgsConstructor
@AllArgsConstructor
public class Pat {
    private String name;
    private Integer age;
}

@Data
@ToString
@NoArgsConstructor
@AllArgsConstructor
public class User {
    private String name;
    private Integer age;
    private Pat pat;

    public User(String name, Integer age) {
        this.name = name;
        this.age = age;
    }
}

Annotation description:

@Import({User.class, DBHelper.class}): These two types of components are automatically created in the container, and the default component name is the full class name

Output component information in the startup class:

/**
 * com.itcast.bean.User: @Import导入的
 * user01：bean注解导入
 */
for (String s : beanNamesForType) {
    System.out.println(s);
}
System.out.println("==============");
String[] dbhelper = run.getBeanNamesForType(DBHelper.class);
for (String s : dbhelper) {
    System.out.println(s);
}
System.out.println("==============");
String[] pat = run.getBeanNamesForType(Pat.class);
for (String s : pat) {
    System.out.println(s);
}

Console output information:

==============
com.itcast.bean.User： @Import注解输出
user01 @Bean注解输出
==============
ch.qos.logback.core.db.DBHelper
==============
jiangziya

Lei Fengyang 2021 version of SpringBoot2 zero-based entry springboot full set of full version (spring boot2)