为什么回错?
<% String bb="nihahaonzaina ";
String cc=wen.charAt(2); %>
<%= bb %>
<%= cc %>
--------------------------------------------------------------
org.apache.jasper.JasperException: Unable to compile class for JSPAn error occurred at line: 1 in the jsp file: /ST.jspGenerated servlet error:
[javac] Compiling 1 source fileC:\Program Files\Apache Software Foundation\Tomcat 5.0\work\Catalina\localhost\wenc\org\apache\jsp\ST_jsp.java:42: cannot find symbol
symbol : variable wen
location: class org.apache.jsp.ST_jsp
String cc=wen.charAt(2);
^
1 error
org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:127)
org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:351)
org.apache.jasper.compiler.Compiler.generateClass(Compiler.java:415)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:458)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:439)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:552)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:291)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:301)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:248)
javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
<% String bb="nihahaonzaina ";
String cc=wen.charAt(2); %>
<%= bb %>
<%= cc %>
--------------------------------------------------------------
org.apache.jasper.JasperException: Unable to compile class for JSPAn error occurred at line: 1 in the jsp file: /ST.jspGenerated servlet error:
[javac] Compiling 1 source fileC:\Program Files\Apache Software Foundation\Tomcat 5.0\work\Catalina\localhost\wenc\org\apache\jsp\ST_jsp.java:42: cannot find symbol
symbol : variable wen
location: class org.apache.jsp.ST_jsp
String cc=wen.charAt(2);
^
1 error
org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:127)
org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:351)
org.apache.jasper.compiler.Compiler.generateClass(Compiler.java:415)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:458)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:439)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:552)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:291)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:301)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:248)
javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
程序--------------------------------
<% String bb="nihahaonzaina ";
String cc="";
cc=bb.charAt(2); %>
<%= bb %>
<%= cc %>
错误---------------------------------------
org.apache.jasper.JasperException: Unable to compile class for JSPAn error occurred at line: 1 in the jsp file: /ST.jspGenerated servlet error:
[javac] Compiling 1 source fileC:\Program Files\Apache Software Foundation\Tomcat 5.0\work\Catalina\localhost\wenc\org\apache\jsp\ST_jsp.java:42: incompatible types
found : char
required: java.lang.String
cc=bb.charAt(2);
^
1 error
org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:127)
org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:351)
org.apache.jasper.compiler.Compiler.generateClass(Compiler.java:415)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:458)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:439)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:552)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:291)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:301)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:248)
javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
note The full stack trace of the root cause is available in the Tomcat logs.
改为:
char cc=wen.charAt(2);
如果不想改类型 就改成String cc=wen.subString(2,3);
symbol : variable wenwen没有定义。