pom.xml
org.reflections reflections0.9.10
IInit.java
package org.example.testsingleton; public interface IInit { void init(); }
Main.java
package org.example.testsingleton; import org.reflections.Reflections; import java.util.Set; public class Main implements IInit { public static int MIN_NAME_LEN = 0; @Override public void init() { MIN_NAME_LEN = 1; } public static void login(String userName) { if (userName.length() < MIN_NAME_LEN) { System.out.println("名字过短"); } else { System.out.println("ok"); } } public static void main(String[] args) { Reflections reflections = new Reflections("org.example.testsingleton"); Set> set = reflections.getSubTypesOf(IInit.class); set.forEach(c -> { try { IInit inst = c.getConstructor().newInstance(); inst.init(); } catch (Exception e) { e.printStackTrace(); } }); System.out.println(Main.MIN_NAME_LEN); Main.login("11"); } }
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