遇到 Unsupported encoding: [uft-8]] with root cause 的bug

qq_38547368 2018-07-19 04:59:55

代码如下

<%@ page language="java" contentType="text/html;charset=utf-8"pageEncoding="uft-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>jsp页面</title>
</head>
<body>
<%
int i=100 , j=200;

%>
100+200 is :<%=i+j %>
</body>
</html>

错误提示
下午 org.apache.catalina.core.StandardWrapperValve invoke
严重: Servlet.service() for servlet [jsp] in context with path [/ch1] threw exception [Unsupported encoding: [uft-8]] with root cause
org.apache.jasper.JasperException: Unsupported encoding: [uft-8]
at org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:55)
at org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:294)
at org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:81)
at org.apache.jasper.compiler.JspUtil.getReader(JspUtil.java:900)
at org.apache.jasper.compiler.ParserController.doParse(ParserController.java:240)
at org.apache.jasper.compiler.ParserController.parseDirectives(ParserController.java:127)
at org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:202)
at org.apache.jasper.compiler.Compiler.compile(Compiler.java:385)
at org.apache.jasper.compiler.Compiler.compile(Compiler.java:362)
at org.apache.jasper.compiler.Compiler.compile(Compiler.java:346)
at org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:603)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:369)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:386)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:330)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:491)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:668)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408)
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:764)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1388)
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Unknown Source)

HTTP Status 500 – Internal Server Error

Type Exception Report

Message /FirstJSPDemo.jsp (line: [1], column: [83]) The JSP specification requires that an attribute name is preceded by whitespace

Description The server encountered an unexpected condition that prevented it from fulfilling the request.

Exception
org.apache.jasper.JasperException: /FirstJSPDemo.jsp (line: [1], column: [83]) The JSP specification requires that an attribute name is preceded by whitespace
org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:42)
org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:292)
org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:98)
org.apache.jasper.compiler.Parser.parseAttributes(Parser.java:170)
org.apache.jasper.compiler.Parser.parseAttributes(Parser.java:196)
org.apache.jasper.compiler.ParserController.getPageEncodingForJspSyntax(ParserController.java:460)
org.apache.jasper.compiler.ParserController.determineSyntaxAndEncoding(ParserController.java:401)
org.apache.jasper.compiler.ParserController.doParse(ParserController.java:200)
org.apache.jasper.compiler.ParserController.parseDirectives(ParserController.java:127)
org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:202)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:385)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:362)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:346)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:603)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:369)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:386)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:330)
javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)

Note The full stack trace of the root cause is available in the server logs.

Apache Tomcat/9.0.10

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