安装tomcat 以后
http://localhost:8080/ 可以显示
Hello World 测试也行
The server encountered an internal error () that prevented it from fulfilling this request.exception org.apache.jasper.JasperException: Unable to compile class for JSP
org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:97)
org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:346)
org.apache.jasper.compiler.Compiler.generateClass(Compiler.java:414)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:472)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:451)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:439)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:511)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:295)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
root cause Unable to find a javac compiler;
com.sun.tools.javac.Main is not on the classpath.
Perhaps JAVA_HOME does not point to the JDK
org.apache.tools.ant.taskdefs.compilers.CompilerAdapterFactory.getCompiler(CompilerAdapterFactory.java:106)
org.apache.tools.ant.taskdefs.Javac.compile(Javac.java:935)
org.apache.tools.ant.taskdefs.Javac.execute(Javac.java:764)
org.apache.jasper.compiler.Compiler.generateClass(Compiler.java:382)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:472)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:451)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:439)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:511)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:295)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
note The full stack trace of the root cause is available in the Apache Tomcat/5.0.28 logs.
我把test.jsp放在C:\Tomcat\webapps\jsp-examples\jsp2\simpletag下
测试报上面的错误!郁闷死了!
http://localhost:8080/ 可以显示
Hello World 测试也行
The server encountered an internal error () that prevented it from fulfilling this request.exception org.apache.jasper.JasperException: Unable to compile class for JSP
org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:97)
org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:346)
org.apache.jasper.compiler.Compiler.generateClass(Compiler.java:414)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:472)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:451)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:439)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:511)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:295)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
root cause Unable to find a javac compiler;
com.sun.tools.javac.Main is not on the classpath.
Perhaps JAVA_HOME does not point to the JDK
org.apache.tools.ant.taskdefs.compilers.CompilerAdapterFactory.getCompiler(CompilerAdapterFactory.java:106)
org.apache.tools.ant.taskdefs.Javac.compile(Javac.java:935)
org.apache.tools.ant.taskdefs.Javac.execute(Javac.java:764)
org.apache.jasper.compiler.Compiler.generateClass(Compiler.java:382)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:472)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:451)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:439)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:511)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:295)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
note The full stack trace of the root cause is available in the Apache Tomcat/5.0.28 logs.
我把test.jsp放在C:\Tomcat\webapps\jsp-examples\jsp2\simpletag下
测试报上面的错误!郁闷死了!
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JAVA_HOME没设置正确
你分别找一下jdk的lib下和tomcat的common下哪里缺少一个tool.jar,你把有的一边copy到没有的一边去提示是因为没有这个包,不支持动态编译JSP
com.sun.tools.javac.Main is not on the classpath.
Perhaps JAVA_HOME does not point to the JDK看看你的javahome
或者在server.xml再配一个Context,然后在webapps下建个目录.
你分别找一下jdk的lib下和tomcat的common下哪里缺少一个tools.jar,你把有的一边copy到没有的一边去提示是因为没有这个包,不支持动态编译JSP
Generated servlet error:
Syntax error on tokens, delete these tokensAn error occurred at line: 4 in the jsp file: /classic.jsp
Generated servlet error:
Syntax error, insert ";" to complete StatementAn error occurred at line: 20 in the jsp file: /classic.jsp
Generated servlet error:
Syntax error on token(s), misplaced construct(s)An error occurred at line: 20 in the jsp file: /classic.jsp
Generated servlet error:
Syntax error on token "<", delete this tokenAn error occurred at line: 20 in the jsp file: /classic.jsp
Generated servlet error:
Syntax error on token "<", invalid ExpressionAn error occurred at line: 20 in the jsp file: /classic.jsp
Generated servlet error:
Syntax error on token "<", invalid Expression
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:510)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:375)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
root cause org.apache.jasper.JasperException: Unable to compile class for JSPAn error occurred at line: 4 in the jsp file: /classic.jsp
Generated servlet error:
Syntax error on tokens, delete these tokensAn error occurred at line: 4 in the jsp file: /classic.jsp
Generated servlet error:
Syntax error, insert ";" to complete StatementAn error occurred at line: 20 in the jsp file: /classic.jsp
Generated servlet error:
Syntax error on token(s), misplaced construct(s)An error occurred at line: 20 in the jsp file: /classic.jsp
Generated servlet error:
Syntax error on token "<", delete this tokenAn error occurred at line: 20 in the jsp file: /classic.jsp
Generated servlet error:
Syntax error on token "<", invalid ExpressionAn error occurred at line: 20 in the jsp file: /classic.jsp
Generated servlet error:
Syntax error on token "<", invalid Expression
org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:84)
org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:328)
org.apache.jasper.compiler.JDTCompiler.generateClass(JDTCompiler.java:409)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:297)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:276)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:264)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:563)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:303)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
note The full stack trace of the root cause is available in the Apache Tomcat/5.5.15 logs.
我从新写了一个还是这样的问题!
Syntax error on tokens, delete these tokensAn error occurred at line: 4 in the jsp file: /classic.jsp
Generated servlet error:
Syntax error, insert ";" to complete StatementAn error occurred at line: 20 in the jsp file: /classic.jsp
Generated servlet error:
Syntax error on token(s), misplaced construct(s)An error occurred at line: 20 in the jsp file: /classic.jsp
Generated servlet error:
Syntax error on token "<", delete this tokenAn error occurred at line: 20 in the jsp file: /classic.jsp
Generated servlet error:
Syntax error on token "<", invalid ExpressionAn error occurred at line: 20 in the jsp file: /classic.jsp
Generated servlet error:
Syntax error on token "<", invalid Expression
这都是标点符号错误。语法的错误,在仔细看看。
<HEAD>
<TITLE>
JSP测试页面---HelloWorld!
</TITLE>
</HEAD>
<BODY>
<center>
当前的时间是:
<%=new java.util.Date()%>
</center>
</BODY>
</HTML>
这个语法也有错吗?
--------------------------------------------------------------------------------type Exception reportmessage 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
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:510)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:375)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
root cause org.apache.jasper.JasperException: Unable to compile class for JSP
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:572)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:303)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
root cause java.io.UTFDataFormatException: Invalid byte 1 of 1-byte UTF-8 sequence.
org.apache.jasper.xmlparser.UTF8Reader.invalidByte(UTF8Reader.java:620)
org.apache.jasper.xmlparser.UTF8Reader.read(UTF8Reader.java:491)
org.apache.jasper.xmlparser.XMLEncodingDetector.load(XMLEncodingDetector.java:999)
org.apache.jasper.xmlparser.XMLEncodingDetector.skipString(XMLEncodingDetector.java:950)
org.apache.jasper.xmlparser.XMLEncodingDetector.scanXMLDecl(XMLEncodingDetector.java:1208)
org.apache.jasper.xmlparser.XMLEncodingDetector.getEncoding(XMLEncodingDetector.java:120)
org.apache.jasper.xmlparser.XMLEncodingDetector.getEncoding(XMLEncodingDetector.java:108)
org.apache.jasper.compiler.ParserController.determineSyntaxAndEncoding(ParserController.java:304)
org.apache.jasper.compiler.ParserController.doParse(ParserController.java:169)
org.apache.jasper.compiler.ParserController.parse(ParserController.java:100)
org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:155)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:295)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:276)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:264)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:563)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:303)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
note The full stack trace of the root cause is available in the Apache Tomcat/5.5.15 logs
java.io.UTFDataFormatException: Invalid byte 1 of 1-byte UTF-8 sequence.
是不是你的代码里面有全角空格之类的不可见字符
自己打一遍,不要用网页上copy的