Unable to compile class for JSP:

標籤：http   io   java   for   sp   on   c   line   ef   

org.apache.jasper.JasperException: Unable to compile class for JSP: An error occurred at line: 1 in the generated java fileThe type java.util.Map$Entry cannot be resolved. It is indirectly referenced from required .class filesStacktrace:org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:102)org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:331)org.apache.jasper.compiler.JDTCompiler.generateClass(JDTCompiler.java:469)org.apache.jasper.compiler.Compiler.compile(Compiler.java:378)org.apache.jasper.compiler.Compiler.compile(Compiler.java:353)org.apache.jasper.compiler.Compiler.compile(Compiler.java:340)org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:646)org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:357)org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)javax.servlet.http.HttpServlet.service(HttpServlet.java:722)

目前位置，在上個錯誤發生後，我降低了JDK版本後，這個錯誤也就消失了！

JDK版本是一個原因。。

Unable to compile class for JSP: