[해결 방법] java.lang.ClassNotFoundException

👉 기본 환경

- Language: Java

- DB: MySQL

- IDE: IntelliJ

 

 

⌨️ 코드

import com.example.demo.dao.srt.SrtFcstInfoDAO;
import com.example.demo.dao.srt.SrtFcstInfoRepository;
import com.example.demo.dto.srt.RqstParams;
import com.example.demo.entity.srt.UltraSrtFcst;
import com.example.demo.entity.srt.UltraSrtNcst;
import com.example.demo.entity.srt.VilageFcst;
import com.example.demo.service.srt.SrtFcstInfoServiceImpl;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;
import org.springframework.transaction.annotation.Transactional;
 
import java.util.List;
 
import static org.junit.Assert.*;
 
@RunWith(SpringRunner.class)
@SpringBootTest
@Transactional
public class srtFcstInfoServiceTest {
 
    @Autowired
    SrtFcstInfoService srtFcstInfoService;
 
    @Autowired
    SrtFcstInfoRepository srtFcstInfoRepository;
 
 
    // UltraSrtNcst
    @Test
    public void 초단기실황조회() throws Exception {
 
        // given
        RqstParams rqstParams = createRqstParams();
 
        // when
        srtFcstInfoService.getUltraSrtNcst(rqstParams);
 
        // then
        List<UltraSrtNcst> savedDataList = srtFcstInfoRepository.findAllUltraSrtNcst();
        assertEquals(Integer.parseInt(rqstParams.getNumOfRows()), savedDataList.size());
 
    }
 
}
 

 

 

🖨️오류

org.gradle.api.internal.tasks.testing.TestSuiteExecutionException: Could not execute test class 'com.example.demo.service.srtFcstInfoServiceTest'.
    at org.gradle.api.internal.tasks.testing.SuiteTestClassProcessor.processTestClass(SuiteTestClassProcessor.java:54)
    at java.base@17.0.7/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at java.base@17.0.7/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
    at java.base@17.0.7/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.base@17.0.7/java.lang.reflect.Method.invoke(Method.java:568)
    at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:36)
    at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24)
    at org.gradle.internal.dispatch.ContextClassLoaderDispatch.dispatch(ContextClassLoaderDispatch.java:33)
    at org.gradle.internal.dispatch.ProxyDispatchAdapter$DispatchingInvocationHandler.invoke(ProxyDispatchAdapter.java:94)
    at jdk.proxy1/jdk.proxy1.$Proxy2.processTestClass(Unknown Source)
    at org.gradle.api.internal.tasks.testing.worker.TestWorker$2.run(TestWorker.java:176)
    at org.gradle.api.internal.tasks.testing.worker.TestWorker.executeAndMaintainThreadName(TestWorker.java:129)
    at org.gradle.api.internal.tasks.testing.worker.TestWorker.execute(TestWorker.java:100)
    at org.gradle.api.internal.tasks.testing.worker.TestWorker.execute(TestWorker.java:60)
    at org.gradle.process.internal.worker.child.ActionExecutionWorker.execute(ActionExecutionWorker.java:56)
    at org.gradle.process.internal.worker.child.SystemApplicationClassLoaderWorker.call(SystemApplicationClassLoaderWorker.java:113)
    at org.gradle.process.internal.worker.child.SystemApplicationClassLoaderWorker.call(SystemApplicationClassLoaderWorker.java:65)
    at app//worker.org.gradle.process.internal.worker.GradleWorkerMain.run(GradleWorkerMain.java:69)
    at app//worker.org.gradle.process.internal.worker.GradleWorkerMain.main(GradleWorkerMain.java:74)
Caused by: org.gradle.internal.UncheckedException: java.lang.ClassNotFoundException: com.example.demo.service.srtFcstInfoServiceTest
    at org.gradle.internal.UncheckedException.throwAsUncheckedException(UncheckedException.java:68)
    at org.gradle.internal.UncheckedException.throwAsUncheckedException(UncheckedException.java:41)
    at org.gradle.api.internal.tasks.testing.junitplatform.JUnitPlatformTestClassProcessor.loadClass(JUnitPlatformTestClassProcessor.java:137)
    at org.gradle.api.internal.tasks.testing.junitplatform.JUnitPlatformTestClassProcessor.access$100(JUnitPlatformTestClassProcessor.java:58)
    at org.gradle.api.internal.tasks.testing.junitplatform.JUnitPlatformTestClassProcessor$CollectAllTestClassesExecutor.execute(JUnitPlatformTestClassProcessor.java:100)
    at org.gradle.api.internal.tasks.testing.junitplatform.JUnitPlatformTestClassProcessor$CollectAllTestClassesExecutor.execute(JUnitPlatformTestClassProcessor.java:90)
    at org.gradle.api.internal.tasks.testing.junit.AbstractJUnitTestClassProcessor.processTestClass(AbstractJUnitTestClassProcessor.java:60)
    at org.gradle.api.internal.tasks.testing.SuiteTestClassProcessor.processTestClass(SuiteTestClassProcessor.java:52)
    ... 18 more
Caused by: java.lang.ClassNotFoundException: com.example.demo.service.srtFcstInfoServiceTest
    at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:641)
    at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:188)
    at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:520)
    at java.base/java.lang.Class.forName0(Native Method)
    at java.base/java.lang.Class.forName(Class.java:467)
    at org.gradle.api.internal.tasks.testing.junitplatform.JUnitPlatformTestClassProcessor.loadClass(JUnitPlatformTestClassProcessor.java:135)
    ... 23 more
 

 

 

📡 원인

1. test class 이름의 시작이 소문자로 시작

 

😮 대문자로 변경해도 동일한 오류 발생

 

2. 프로젝트 파일 경로에 한글이 있을 경우, 인코딩 문제로 오류 발생

    - IntelliJ에서 콘솔창에 한글 설정을 위해 idea64.exe.vmoptions에 -Dfile.encoding=UTF-8를 추가한 부분에서 문제 발생

    - 📚 IntelliJ에서 콘솔창에 한글 설정 참고 자료

[IntelliJ] 콘솔 한글깨짐 처리 (console log encoding .. with tomcat)

 

 

📰 해결 방법

1. test class 이름의 시작이 대문자로 변경

 

😮 대문자로 변경해도 동일한 오류 발생 시,

 

2. 프로젝트 파일 경로를 모두 영문으로 변경