原文件:
<%@ page contentType="text/html;charset=gb2312"%><%@ page import="java.util.*"%>
<html>
<body>
<% int c;
int a=10,b=3;
out.println("a="+a+",b="+b+"<br>");
out.println("a/b="+(a/b)+"<br>");
out.println("a%b="+(a%b)+"<br>");
a++;
out.prinTln("a++后a="+a+"<br>");
c=b++;
out.println("c=b++后c="+c+"<br>");
b--; //恢复b的值
c=++b;
out.println("c=++b后c="+c+"<br>");
%></body>
</html>错误提示
HTTP Status 500 - --------------------------------------------------------------------------------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 JSPAn error occurred at line: 6 in the jsp file: /test/mathApp1.jsp
Generated servlet error:
The method prinTln(String) is undefined for the type JspWriter
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: 6 in the jsp file: /test/mathApp1.jsp
Generated servlet error:
The method prinTln(String) is undefined for the type JspWriter
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:414)
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/5.5.17 logs.
--------------------------------------------------------------------------------
<%@ page contentType="text/html;charset=gb2312"%><%@ page import="java.util.*"%>
<html>
<body>
<% int c;
int a=10,b=3;
out.println("a="+a+",b="+b+"<br>");
out.println("a/b="+(a/b)+"<br>");
out.println("a%b="+(a%b)+"<br>");
a++;
out.prinTln("a++后a="+a+"<br>");
c=b++;
out.println("c=b++后c="+c+"<br>");
b--; //恢复b的值
c=++b;
out.println("c=++b后c="+c+"<br>");
%></body>
</html>错误提示
HTTP Status 500 - --------------------------------------------------------------------------------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 JSPAn error occurred at line: 6 in the jsp file: /test/mathApp1.jsp
Generated servlet error:
The method prinTln(String) is undefined for the type JspWriter
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: 6 in the jsp file: /test/mathApp1.jsp
Generated servlet error:
The method prinTln(String) is undefined for the type JspWriter
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:414)
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/5.5.17 logs.
--------------------------------------------------------------------------------
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应为
out.println("a++后a="+a+"<br>");
为什么他指向 line: 6 呢 很是不解 谢谢你的回答
知道jsp的工作原理,就不难理解了