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[springboot] 2.0 사용시 패키징이 되지 않을 때(jar 혹은 war) 2018.07.12
[스프링부트] Executable JAR 내에서 ResourceUtil.getFile() 사용시 FileNotFoundException 발생 2016.02.22
실행가능한 JAR여부 판단하기 2015.03.19
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[springboot] 2.0 사용시 패키징이 되지 않을 때(jar 혹은 war)

2018. 7. 12. 20:16

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2016. 2. 22. 11:57

[스프링부트] Executable JAR 내에서 ResourceUtil.getFile() 사용시 FileNotFoundException 발생

발생문제

IDE에서 실행하거나 bootrun 명령으로 실행시켰을 경우에는 별다른 이상없이 동작하던

File defaultProfileImage = ResourceUtil.getFile("static/images/default-profile.png");

가 실행가능한 jar(Excutable jar) 형태로 만들어 실행시에는 java.io.FileNotFoundException 을 일으킨다. 그 접근경로를 살펴보면,

...Exception: java.io.FileNotFoundException: class path resource [static/images/default-profile.png] cannot be resolved to absolute file path because it does not reside in the file system: jar:file:/home/ihoneymon/.../build/libs/innoquartz-server.war!/WEB-INF/classes!/static/images/default-profile.png
    at io.honeymon.test.member.ApplicantServiceImpl.setDefaultProfileImage(ApplicantServiceImpl.java:59) ~[classes!/:na]
    at io.honeymon.test.member.ApplicantServiceImpl.register(ApplicantServiceImpl.java:39) ~[classes!/:na]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_25]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_25]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_25]
    at java.lang.reflect.Method.invoke(Method.java:483) ~[na:1.8.0_25]
    at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:302) ~[spring-aop-4.2.4.RELEASE.jar!/:4.2.4.RELEASE]
    at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:190) ~[spring-aop-4.2.4.RELEASE.jar!/:4.2.4.RELEASE]
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157) ~[spring-aop-4.2.4.RELEASE.jar!/:4.2.4.RELEASE]
    at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:99) ~[spring-tx-4.2.4.RELEASE.jar!/:4.2.4.RELEASE]
    at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:281) ~[spring-tx-4.2.4.RELEASE.jar!/:4.2.4.RELEASE]
    at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96) ~[spring-tx-4.2.4.RELEASE.jar!/:4.2.4.RELEASE]
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) ~[spring-aop-4.2.4.RELEASE.jar!/:4.2.4.RELEASE]
    at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:208) ~[spring-aop-4.2.4.RELEASE.jar!/:4.2.4.RELEASE]
    at com.sun.proxy.$Proxy172.register(Unknown Source) ~[na:na]
    at io.honeymon.test.member.SignupController.signUp(SignupController.java:53) ~[classes!/:na]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_25]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_25]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_25]
    at java.lang.reflect.Method.invoke(Method.java:483) ~[na:1.8.0_25]
    at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:222) [spring-web-4.2.4.RELEASE.jar!/:4.2.4.RELEASE]
    at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:137) [spring-web-4.2.4.RELEASE.jar!/:4.2.4.RELEASE]
    at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:110) [spring-webmvc-4.2.4.RELEASE.jar!/:4.2.4.RELEASE]
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:814) [spring-webmvc-4.2.4.RELEASE.jar!/:4.2.4.RELEASE]
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:737) [spring-webmvc-4.2.4.RELEASE.jar!/:4.2.4.RELEASE]
    at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85) [spring-webmvc-4.2.4.RELEASE.jar!/:4.2.4.RELEASE]
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:959) [spring-webmvc-4.2.4.RELEASE.jar!/:4.2.4.RELEASE]
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:893) [spring-webmvc-4.2.4.RELEASE.jar!/:4.2.4.RELEASE]
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:969) [spring-webmvc-4.2.4.RELEASE.jar!/:4.2.4.RELEASE]
    at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:871) [spring-webmvc-4.2.4.RELEASE.jar!/:4.2.4.RELEASE]
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:707) [javax.servlet-api-3.1.0.jar!/:3.1.0]
    at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:845) [spring-webmvc-4.2.4.RELEASE.jar!/:4.2.4.RELEASE]
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:790) [javax.servlet-api-3.1.0.jar!/:3.1.0]
    at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:812) [jetty-servlet-9.2.14.v20151106.jar!/:9.2.14.v20151106]
    at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1669) [jetty-servlet-9.2.14.v20151106.jar!/:9.2.14.v20151106]
    at org.eclipse.jetty.websocket.server.WebSocketUpgradeFilter.doFilter(WebSocketUpgradeFilter.java:224) [websocket-server-9.2.14.v20151106.jar!/:9.2.14.v20151106]
    at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652) [jetty-servlet-9.2.14.v20151106.jar!/:9.2.14.v20151106]
    at org.springframework.boot.actuate.autoconfigure.EndpointWebMvcAutoConfiguration$ApplicationContextHeaderFilter.doFilterInternal(EndpointWebMvcAutoConfiguration.java:243) [spring-boot-actuator-1.3.1.RELEASE.jar!/:1.3.1.RELEASE]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.2.4.RELEASE.jar!/:4.2.4.RELEASE]
    at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652) [jetty-servlet-9.2.14.v20151106.jar!/:9.2.14.v20151106]
    at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:77) [spring-web-4.2.4.RELEASE.jar!/:4.2.4.RELEASE]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.2.4.RELEASE.jar!/:4.2.4.RELEASE]
    at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652) [jetty-servlet-9.2.14.v20151106.jar!/:9.2.14.v20151106]
    at org.springframework.boot.actuate.trace.WebRequestTraceFilter.doFilterInternal(WebRequestTraceFilter.java:111) [spring-boot-actuator-1.3.1.RELEASE.jar!/:1.3.1.RELEASE]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.2.4.RELEASE.jar!/:4.2.4.RELEASE]
    at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652) [jetty-servlet-9.2.14.v20151106.jar!/:9.2.14.v20151106]
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:316) [spring-security-web-4.0.3.RELEASE.jar!/:4.0.3.RELEASE]
    at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:126) [spring-security-web-4.0.3.RELEASE.jar!/:4.0.3.RELEASE]
    at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:90) [spring-security-web-4.0.3.RELEASE.jar!/:4.0.3.RELEASE]
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330) [spring-security-web-4.0.3.RELEASE.jar!/:4.0.3.RELEASE]
    at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:114) [spring-security-web-4.0.3.RELEASE.jar!/:4.0.3.RELEASE]
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330) [spring-security-web-4.0.3.RELEASE.jar!/:4.0.3.RELEASE]
    at org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:122) [spring-security-web-4.0.3.RELEASE.jar!/:4.0.3.RELEASE]
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330) [spring-security-web-4.0.3.RELEASE.jar!/:4.0.3.RELEASE]
    at org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:111) [spring-security-web-4.0.3.RELEASE.jar!/:4.0.3.RELEASE]
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330) [spring-security-web-4.0.3.RELEASE.jar!/:4.0.3.RELEASE]
    at org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:169) [spring-security-web-4.0.3.RELEASE.jar!/:4.0.3.RELEASE]
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330) [spring-security-web-4.0.3.RELEASE.jar!/:4.0.3.RELEASE]
    at org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.java:48) [spring-security-web-4.0.3.RELEASE.jar!/:4.0.3.RELEASE]
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330) [spring-security-web-4.0.3.RELEASE.jar!/:4.0.3.RELEASE]
    at org.springframework.security.web.authentication.www.BasicAuthenticationFilter.doFilterInternal(BasicAuthenticationFilter.java:158) [spring-security-web-4.0.3.RELEASE.jar!/:4.0.3.RELEASE]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.2.4.RELEASE.jar!/:4.2.4.RELEASE]
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330) [spring-security-web-4.0.3.RELEASE.jar!/:4.0.3.RELEASE]
    at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:205) [spring-security-web-4.0.3.RELEASE.jar!/:4.0.3.RELEASE]
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330) [spring-security-web-4.0.3.RELEASE.jar!/:4.0.3.RELEASE]
    at org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:120) [spring-security-web-4.0.3.RELEASE.jar!/:4.0.3.RELEASE]
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330) [spring-security-web-4.0.3.RELEASE.jar!/:4.0.3.RELEASE]
    at org.springframework.security.web.header.HeaderWriterFilter.doFilterInternal(HeaderWriterFilter.java:64) [spring-security-web-4.0.3.RELEASE.jar!/:4.0.3.RELEASE]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.2.4.RELEASE.jar!/:4.2.4.RELEASE]
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330) [spring-security-web-4.0.3.RELEASE.jar!/:4.0.3.RELEASE]
    at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:91) [spring-security-web-4.0.3.RELEASE.jar!/:4.0.3.RELEASE]
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330) [spring-security-web-4.0.3.RELEASE.jar!/:4.0.3.RELEASE]
    at org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter.doFilterInternal(WebAsyncManagerIntegrationFilter.java:53) [spring-security-web-4.0.3.RELEASE.jar!/:4.0.3.RELEASE]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.2.4.RELEASE.jar!/:4.2.4.RELEASE]
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330) [spring-security-web-4.0.3.RELEASE.jar!/:4.0.3.RELEASE]
    at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:213) [spring-security-web-4.0.3.RELEASE.jar!/:4.0.3.RELEASE]
    at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:176) [spring-security-web-4.0.3.RELEASE.jar!/:4.0.3.RELEASE]
    at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:346) [spring-web-4.2.4.RELEASE.jar!/:4.2.4.RELEASE]
    at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:262) [spring-web-4.2.4.RELEASE.jar!/:4.2.4.RELEASE]
    at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652) [jetty-servlet-9.2.14.v20151106.jar!/:9.2.14.v20151106]
    at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99) [spring-web-4.2.4.RELEASE.jar!/:4.2.4.RELEASE]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.2.4.RELEASE.jar!/:4.2.4.RELEASE]
    at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652) [jetty-servlet-9.2.14.v20151106.jar!/:9.2.14.v20151106]
    at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:121) [spring-web-4.2.4.RELEASE.jar!/:4.2.4.RELEASE]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.2.4.RELEASE.jar!/:4.2.4.RELEASE]
    at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652) [jetty-servlet-9.2.14.v20151106.jar!/:9.2.14.v20151106]
    at org.springframework.boot.actuate.autoconfigure.MetricsFilter.doFilterInternal(MetricsFilter.java:103) [spring-boot-actuator-1.3.1.RELEASE.jar!/:1.3.1.RELEASE]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.2.4.RELEASE.jar!/:4.2.4.RELEASE]
    at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652) [jetty-servlet-9.2.14.v20151106.jar!/:9.2.14.v20151106]
    at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:585) [jetty-servlet-9.2.14.v20151106.jar!/:9.2.14.v20151106]
    at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143) [jetty-server-9.2.14.v20151106.jar!/:9.2.14.v20151106]
    at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:577) [jetty-security-9.2.14.v20151106.jar!/:9.2.14.v20151106]
    at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:223) [jetty-server-9.2.14.v20151106.jar!/:9.2.14.v20151106]
    at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1127) [jetty-server-9.2.14.v20151106.jar!/:9.2.14.v20151106]
    at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:515) [jetty-servlet-9.2.14.v20151106.jar!/:9.2.14.v20151106]
    at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:185) [jetty-server-9.2.14.v20151106.jar!/:9.2.14.v20151106]
    at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1061) [jetty-server-9.2.14.v20151106.jar!/:9.2.14.v20151106]
    at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141) [jetty-server-9.2.14.v20151106.jar!/:9.2.14.v20151106]
    at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:97) [jetty-server-9.2.14.v20151106.jar!/:9.2.14.v20151106]
    at org.eclipse.jetty.server.Server.handle(Server.java:499) [jetty-server-9.2.14.v20151106.jar!/:9.2.14.v20151106]
    at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:311) [jetty-server-9.2.14.v20151106.jar!/:9.2.14.v20151106]
    at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:257) [jetty-server-9.2.14.v20151106.jar!/:9.2.14.v20151106]
    at org.eclipse.jetty.io.AbstractConnection$2.run(AbstractConnection.java:544) [jetty-io-9.2.14.v20151106.jar!/:9.2.14.v20151106]
    at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:635) [jetty-util-9.2.14.v20151106.jar!/:9.2.14.v20151106]
    at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:555) [jetty-util-9.2.14.v20151106.jar!/:9.2.14.v20151106]
    at java.lang.Thread.run(Thread.java:745) [na:1.8.0_25]

로그를 살펴보면 cannot be resolved to absolute file path because it does not reside in the file system: jar:file:/home/ihoneymon/.../build/libs/innoquartz-server.war!/WEB-INF/classes!/static/images/default-profile.png 항목이 보일 것이다. 이에 대해서는,

해결책

war 파일이나 IDE로 application run as로 실행하였다면 실제 resource 파일인 file:// 프로토콜을 쓰기 때문에 File객체를 생성해 줄수 있지만, executable jar로 실행 했다면 FileNotFoundException이 발생 하게 됩니다.

Spring Boot Executable jar에서 file resource 처리 - 소내기의 겸손한 지식

에서 설명하고 있다. jar 파일로 실행시에는 VfsResourceDelegate 를 사용하면서 실제 파일시스템에서 지원하는 프로토콜로 처리가 되기에 의도했던 것과는 다르게 동작하게 된다. 이를 해결하기 위한 방법도 위의 포스팅에서 설명되어 있다.

해결적용

ClassPathResource classPathResource = new ClassPathResource("static/images/default-profile.png");
// classPathResource.getInputStream(); 를 사용하도록 처리

문제 해결!

참고

Spring Boot Executable jar에서 file resource 처리 - 소내기의 겸손한 지식

저작자표시

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실행가능한 JAR여부 판단하기

2015. 3. 19. 10:54

실행가능한 JAR(executable jar)을 생성하게 되면 다음과 같이 META-INF 폴더 밑에 MANIFEST.MF 파일이 생성된다.

├── Application.class
└── META-INF
    └── MANIFEST.MF

MANIFEST.MF 내용

Manifest specification

Manifest-Version: 1.0
Class-Path: .
Main-Class: Application // 실행가능한jar의 엔트리포인트가 되는 클래스명

예제

java.util.jar.JarFile API를 이용해서 Jar 파일에 대한 정보를 읽어드릴 수 있다.
다음과 같이 JDK6과 JDK7에서 가져올 수 있는 부분이 다른 것으로 보인다.

ㅡ_-);; JDK6, JDK7, JDK8에서 다를 수 있는데 그걸 테스트하기가 좀… 귀찮…

JarFile jarFile = new JarFile(/** 식별하려고 하는 jar 파일*/);

private boolean hasMainClassManifest(JarFile jarFile) throws IOException {
    Double javaVersion = Double.parseDouble(System.getProperty("java.specification.version"));
    log.debug("Java version: {}", javaVersion);
    log.debug("Has Main-Class: {}", jarFile.getManifest().getEntries().containsKey("Main-Class"));
    log.debug("Has Main-Class: {}", jarFile.getManifest().getMainAttributes().getValue("Main-Class"));
    if(1.7 > javaVersion) {
        return jarFile.getManifest().getEntries().containsKey("Main-Class");
    } else if(1.7 == javaVersion) {
        return null != jarFile.getManifest().getMainAttributes().getValue("Main-Class");
    } else {
        //TODO JDK 8 에서는 어떻게 될까?
        log.debug("Not implements");
        return false;
    }
}

대략 위의 메서드를 통해서 선택한 jar가 실행가능한 Main-Class를 가지고 있는지 여부를 확인할 수 있다.

참고

JAR File Specification

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실행가능한 .jar 실행하기

2010. 2. 20. 00:35

방법은 간단하다.

java -jar 파일명.jar

하면 된다.

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