excel导出在docker环境中总是失败的问题
excel导出在docker环境中总是失败，最直接的原因还是因为没有安装中文字体，解决方法如下：
DOCKER环境中没有安装中文字体，需要安装
java.lang.NullPointerException:null 2020/5/29上午8:40:11atsun.awt.FontConfiguration.getVersion(FontConfiguration.java:1264) 2020/5/29上午8:40:11atsun.awt.FontConfiguration.readFontConfigFile(FontConfiguration.java:219) 2020/5/29上午8:40:11atsun.awt.FontConfiguration.init(FontConfiguration.java:107) 2020/5/29上午8:40:11atsun.awt.X11FontManager.createFontConfiguration(X11FontManager.java:776) 2020/5/29上午8:40:11atsun.font.SunFontManager$2.run(SunFontManager.java:431) 2020/5/29上午8:40:11atjava.security.AccessController.doPrivileged(NativeMethod) 2020/5/29上午8:40:11atsun.font.SunFontManager.(SunFontManager.java:376) 2020/5/29上午8:40:11atsun.awt.X11FontManager. (X11FontManager.java:57) 2020/5/29上午8:40:11atsun.reflect.NativeConstructorAccessorImpl.newInstance0(NativeMethod) 2020/5/29上午8:40:11atsun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) 2020/5/29上午8:40:11atsun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) 2020/5/29上午8:40:11atjava.lang.reflect.Constructor.newInstance(Constructor.java:422) 2020/5/29上午8:40:11atjava.lang.Class.newInstance(Class.java:442) 2020/5/29上午8:40:11atsun.font.FontManagerFactory$1.run(FontManagerFactory.java:83) 2020/5/29上午8:40:11atjava.security.AccessController.doPrivileged(NativeMethod) 2020/5/29上午8:40:11atsun.font.FontManagerFactory.getInstance(FontManagerFactory.java:74) 2020/5/29上午8:40:11atjava.awt.Font.getFont2D(Font.java:491) 2020/5/29上午8:40:11atjava.awt.Font.canDisplayUpTo(Font.java:2060) 2020/5/29上午8:40:11atjava.awt.font.TextLayout.singleFont(TextLayout.java:470) 2020/5/29上午8:40:11atjava.awt.font.TextLayout. (TextLayout.java:531) 2020/5/29上午8:40:11atorg.apache.poi.ss.util.SheetUtil.getDefaultCharWidth(SheetUtil.java:254) 2020/5/29上午8:40:11atorg.apache.poi.xssf.streaming.AutoSizeColumnTracker. (AutoSizeColumnTracker.java:117) 2020/5/29上午8:40:11atorg.apache.poi.xssf.streaming.SXSSFSheet. (SXSSFSheet.java:77) 2020/5/29上午8:40:11atorg.apache.poi.xssf.streaming.SXSSFWorkbook.createAndRegisterSXSSFSheet(SXSSFWorkbook.java:636) 2020/5/29上午8:40:11atorg.apache.poi.xssf.streaming.SXSSFWorkbook.createSheet(SXSSFWorkbook.java:657) 2020/5/29上午8:40:11atorg.apache.poi.xssf.streaming.SXSSFWorkbook.createSheet(SXSSFWorkbook.java:71) 2020/5/29上午8:40:11atcom.chanjet.dsf.util.ExcelUtil.exportExcel(ExcelUtil.java:783) 2020/5/29上午8:40:11atcom.chanjet.dsf.base.BaseService.uploadExcel(BaseService.java:89) 2020/5/29上午8:40:11atcom.chanjet.dsf.goods.service.impl.GoodsServiceImpl.importExcel(GoodsServiceImpl.java:340) 2020/5/29上午8:40:11atcom.chanjet.dsf.goods.service.impl.GoodsServiceImpl$$FastClassBySpringCGLIB$$d268cc51.invoke( ) 2020/5/29上午8:40:11atorg.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:218) 2020/5/29上午8:40:11atorg.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:685) 2020/5/29上午8:40:11atcom.chanjet.dsf.goods.service.impl.GoodsServiceImpl$$EnhancerBySpringCGLIB$$a0a512ec.importExcel( ) 2020/5/29上午8:40:11atcom.chanjet.dsf.goods.controller.GoodsController.importExcel(GoodsController.java:105) 2020/5/29上午8:40:11atsun.reflect.NativeMethodAccessorImpl.invoke0(NativeMethod) 2020/5/29上午8:40:11atsun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) 2020/5/29上午8:40:11atsun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 2020/5/29上午8:40:11atjava.lang.reflect.Method.invoke(Method.java:497) 2020/5/29上午8:40:11atorg.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:190) 2020/5/29上午8:40:11atorg.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138) 2020/5/29上午8:40:11atorg.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:106) 2020/5/29上午8:40:11atorg.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:879) 2020/5/29上午8:40:11atorg.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:793) 2020/5/29上午8:40:11atorg.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) 2020/5/29上午8:40:11atorg.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1040) 2020/5/29上午8:40:11atorg.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:943) 2020/5/29上午8:40:11atorg.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006) 2020/5/29上午8:40:11atorg.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:909) 2020/5/29上午8:40:11atjavax.servlet.http.HttpServlet.service(HttpServlet.java:660) 2020/5/29上午8:40:11atorg.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883) 2020/5/29上午8:40:11atjavax.servlet.http.HttpServlet.service(HttpServlet.java:741) 2020/5/29上午8:40:11atorg.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) 2020/5/29上午8:40:11atorg.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) 2020/5/29上午8:40:11atorg.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) 2020/5/29上午8:40:11atorg.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) 2020/5/29上午8:40:11atorg.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) 2020/5/29上午8:40:11atcom.chanjet.dsf.filter.RefreshContextFilter.doFilter(RefreshContextFilter.java:29) 2020/5/29上午8:40:11atorg.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) 2020/5/29上午8:40:11atorg.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) 2020/5/29上午8:40:11atcom.chanjet.dsf.filter.WebLogMDCFilter.doFilter(WebLogMDCFilter.java:27) 2020/5/29上午8:40:11atorg.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) 2020/5/29上午8:40:11atorg.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) 2020/5/29上午8:40:11atorg.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201) 2020/5/29上午8:40:11atorg.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) 2020/5/29上午8:40:11atorg.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) 2020/5/29上午8:40:11atorg.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) 2020/5/29上午8:40:11atorg.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202) 2020/5/29上午8:40:11atorg.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) 2020/5/29上午8:40:11atorg.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:541) 2020/5/29上午8:40:11atorg.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139) 2020/5/29上午8:40:11atorg.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) 2020/5/29上午8:40:11atorg.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74) 2020/5/29上午8:40:11atorg.apache.catalina.valves.RemoteIpValve.invoke(RemoteIpValve.java:747) 2020/5/29上午8:40:11atorg.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343) 2020/5/29上午8:40:11atorg.apache.coyote.http11.Http11Processor.service(Http11Processor.java:367) 2020/5/29上午8:40:11atorg.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65) 2020/5/29上午8:40:11atorg.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:868) 2020/5/29上午8:40:11atorg.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1639) 2020/5/29上午8:40:11atorg.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) 2020/5/29上午8:40:11atjava.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) 2020/5/29上午8:40:11atjava.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) 2020/5/29上午8:40:11atorg.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) 2020/5/29上午8:40:11atjava.lang.Thread.run(Thread.java:745)
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