                        课程
                    
                        /后端开发
                        
                            /Java
                        
                        /JAVA遇见HTML——JSP篇

tomcat正常启动了，但是打开网页就是打不开

type Exception report

message

description The server encountered an internal error () that prevented it from fulfilling this request.

exception

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 files

Stacktrace:
org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:95)
org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:330)
org.apache.jasper.compiler.JDTCompiler.generateClass(JDTCompiler.java:457)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:367)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:345)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:332)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:594)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:342)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:391)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
javax.servlet.http.HttpServlet.service(HttpServlet.java:722)

这就是打开网页报的错，jdk环境变量也设置好了

求指导