package com.gkhy.firework; import lombok.extern.slf4j.Slf4j; import org.junit.Test; import org.junit.runner.RunWith; import org.springframework.boot.test.context.SpringBootTest; import org.springframework.test.context.junit4.SpringRunner; @RunWith(SpringRunner.class) @SpringBootTest(classes = FireworkApplication.class) //@ActiveProfiles("dev") @Slf4j public class TestDemo { @Test public void testStr(){ String idstr="65430119830313043X"; System.out.println(idstr.substring(6,14)); } }