报错信息：

org.apache.jasper.JasperException: Unable to compile class for JSP: An error occurred at line: 1 in the generated java file
The type java.io.ObjectInputStream cannot be resolved. It is indirectly referenced from required .class filesStacktrace:org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:92)org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:330)org.apache.jasper.compiler.JDTCompiler.generateClass(JDTCompiler.java:439)org.apache.jasper.compiler.Compiler.compile(Compiler.java:349)org.apache.jasper.compiler.Compiler.compile(Compiler.java:327)org.apache.jasper.compiler.Compiler.compile(Compiler.java:314)org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:592)org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:317)org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)javax.servlet.http.HttpServlet.service(HttpServlet.java:717)org.springframework.web.servlet.view.InternalResourceView.renderMergedOutputModel(InternalResourceView.java:172)org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:303)org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1228)org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:1011)org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:955)org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:877)org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:966)org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:857)javax.servlet.http.HttpServlet.service(HttpServlet.java:617)org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:842)javax.servlet.http.HttpServlet.service(HttpServlet.java:717)

note The full stack trace of the root cause is available in the Apache Tomcat/6.0.29 logs.

Apache Tomcat/6.0.29

看了最后一行tomcat的版本是6，再结合百度的说明，感觉是tomcat的版本不对。

我本来启动的命令是mvn tomcat:run，于是我换成mvn tomcat7:run尝试着启动，没想到问题就解决了