jsp - 引起：java.lang.ClassNotFoundException：com.google.appengine.api.utils.SystemProperty

Question

我是 Google Cloud 平台的初学者，我使用 NetBeans 8.2 部署了我的 java Web 应用程序，并按照此链接上的教程进行操作。当我运行 appengine 时，它​​返回：

“错误：服务器错误

服务器遇到错误，无法完成您的请求。请在 30 秒后重试。”

当我在 Google Cloud Platform 的错误报告中检查错误时：

java.lang.NoClassDefFoundError: com/google/appengine/api/utils/SystemProperty
at org.apache.jsp.login_jsp._jspService (login_jsp.java:120)
at org.apache.jasper.runtime.HttpJspBase.service (HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service (HttpServlet.java:790)
at org.eclipse.jetty.servlet.ServletHolder.handle (ServletHolder.java:848)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter (ServletHandler.java:1772)
at com.google.apphosting.utils.servlet.JdbcMySqlConnectionCleanupFilter.doFilter (JdbcMySqlConnectionCleanupFilter.java:60)
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter (ServletHandler.java:1759)
at org.eclipse.jetty.servlet.ServletHandler.doHandle (ServletHandler.java:582)
at org.eclipse.jetty.server.handler.ScopedHandler.handle (ScopedHandler.java:143)
at org.eclipse.jetty.security.SecurityHandler.handle (SecurityHandler.java:524)
at org.eclipse.jetty.server.session.SessionHandler.doHandle (SessionHandler.java:226)
at org.eclipse.jetty.server.handler.ScopedHandler.handle (ScopedHandler.java:143)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle (HandlerWrapper.java:134)
at com.google.apphosting.runtime.jetty9.ParseBlobUploadHandler.handle (ParseBlobUploadHandler.java:119)
at org.eclipse.jetty.server.handler.ContextHandler.doHandle (ContextHandler.java:1182)
at com.google.apphosting.runtime.jetty9.AppEngineWebAppContext.doHandle (AppEngineWebAppContext.java:187)
at org.eclipse.jetty.servlet.ServletHandler.doScope (ServletHandler.java:512)
at org.eclipse.jetty.server.session.SessionHandler.doScope (SessionHandler.java:185)
at org.eclipse.jetty.server.handler.ContextHandler.doScope (ContextHandler.java:1112)
at org.eclipse.jetty.server.handler.ScopedHandler.handle (ScopedHandler.java:141)
at com.google.apphosting.runtime.jetty9.AppVersionHandlerMap.handle (AppVersionHandlerMap.java:293)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle (HandlerWrapper.java:134)
at org.eclipse.jetty.server.Server.handle (Server.java:539)
at org.eclipse.jetty.server.HttpChannel.handle (HttpChannel.java:333)
at com.google.apphosting.runtime.jetty9.RpcConnection.handle (RpcConnection.java:213)
at com.google.apphosting.runtime.jetty9.RpcConnector.serviceRequest (RpcConnector.java:81)
at com.google.apphosting.runtime.jetty9.JettyServletEngineAdapter.serviceRequest (JettyServletEngineAdapter.java:134)
at com.google.apphosting.runtime.JavaRuntime$RequestRunnable.dispatchServletRequest (JavaRuntime.java:757)
at com.google.apphosting.runtime.JavaRuntime$RequestRunnable.dispatchRequest (JavaRuntime.java:720)
at com.google.apphosting.runtime.JavaRuntime$RequestRunnable.run (JavaRuntime.java:690)
at com.google.apphosting.runtime.JavaRuntime$NullSandboxRequestRunnable.run (JavaRuntime.java:882)
at com.google.apphosting.runtime.ThreadGroupPool$PoolEntry.run (ThreadGroupPool.java:270)
at java.lang.Thread.run (Thread.java:748)

我把 jar 文件放在这个链接中说的库中。

这是什么意思？我只是不想在 Google Cloud SQL 中连接我的 Web 应用程序，登录后它返回 500 服务器错误。

先感谢您。

标签： jspgoogle-app-engine