Tomcat打报表报错NullPointerException.求解

问题描述

以下是错误提示：MissingPermissionsmanifestattributefor:http://localhost:8080/ZktrReport/ReportPrint.jarMissingCodebasemanifestattributefor:http://localhost:8080/ZktrReport/ReportPrint.jarMissingApplication-Name:manifestattributefor:http://localhost:8080/ZktrReport/ReportPrint.jarMissingPermissionsmanifestattributefor:http://localhost:8080/ZktrReport/ReportPrint.jarMissingCodebasemanifestattributefor:http://localhost:8080/ZktrReport/ReportPrint.jarMissingApplication-Name:manifestattributefor:http://localhost:8080/ZktrReport/ReportPrint.jarMissingPermissionsmanifestattributefor:http://localhost:8080/ZktrReport/ReportPrint.jarMissingCodebasemanifestattributefor:http://localhost:8080/ZktrReport/ReportPrint.jarjava.io.IOException:ServerreturnedHTTPresponsecode:500forURL:http://localhost:8080/ZktrReport/ReportEmitter?rpt=fxwz%2Fdanju%2Flld.brt&emitter=toobj&brf=false&pagecap=-1&params=Ywdj_ID%3D34759&vars=nullatsun.net.www.protocol.http.HttpURLConnection.getInputStream(UnknownSource)atbios.report.web.print.WebPrintApplet.init(UnknownSource)atcom.sun.deploy.uitoolkit.impl.awt.AWTAppletAdapter.init(UnknownSource)atsun.plugin2.applet.Plugin2Manager$AppletExecutionRunnable.run(UnknownSource)atjava.lang.Thread.run(UnknownSource)MissingApplication-Name:manifestattributefor:http://localhost:8080/ZktrReport/ReportPrint.jarMissingPermissionsmanifestattributefor:http://localhost:8080/ZktrReport/ReportPrint.jarMissingCodebasemanifestattributefor:http://localhost:8080/ZktrReport/ReportPrint.jarMissingApplication-Name:manifestattributefor:http://localhost:8080/ZktrReport/ReportPrint.jarMissingPermissionsmanifestattributefor:http://localhost:8080/ZktrReport/ReportPrint.jarMissingCodebasemanifestattributefor:http://localhost:8080/ZktrReport/ReportPrint.jarMissingApplication-Name:manifestattributefor:http://localhost:8080/ZktrReport/ReportPrint.jarMissingPermissionsmanifestattributefor:http://localhost:8080/ZktrReport/ReportPrint.jarMissingCodebasemanifestattributefor:http://localhost:8080/ZktrReport/ReportPrint.jarjava.io.IOException:ServerreturnedHTTPresponsecode:500forURL:http://localhost:8080/ZktrReport/ReportEmitter?rpt=fxwz%2Fdanju%2Flld.brt&emitter=toobj&brf=false&pagecap=-1&params=Ywdj_ID%3D34759&vars=nullatsun.net.www.protocol.http.HttpURLConnection.getInputStream(UnknownSource)atbios.report.web.print.WebPrintApplet.init(UnknownSource)atcom.sun.deploy.uitoolkit.impl.awt.AWTAppletAdapter.init(UnknownSource)atsun.plugin2.applet.Plugin2Manager$AppletExecutionRunnable.run(UnknownSource)atjava.lang.Thread.run(UnknownSource)在下是小白，请各位好心的大大能用通俗语言解答，谢谢：）

解决方案

解决方案二：
别的先不说，光就这提问的态度。。。提问最起码好好准备下，给个图片，描述清楚是吧。这个空指针异常最常见的学习下debug跟下
解决方案三：
applet打印啊，打签名了没
解决方案四：
楼主解决了吗？我也遇到这样问题，jar签名了都不管用