https://bz.apache.org/bugzilla/show_bug.cgi?id=58110
Bug ID: 58110
Summary: JSP compiler points error to wrong line number when
there are two same return statements.
Product: Tomcat 7
Version: unspecified
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P2
Component: Jasper
Assignee: dev@tomcat.apache.org
Reporter: lovet...@qq.com
Created attachment 32888
--> https://bz.apache.org/bugzilla/attachment.cgi?id=32888&action=edit
Apache Tomcat_7.0.61 - Error report.html
I forgot to delete the last return "" statement, and JSP compile point error to
line number #8 which is same as the last return statement.
Code:
----------------------------------------------------------------------------------------------------
<%@ page pageEncoding='UTF-8' contentType='text/html'%>
<%@ page import = 'java.util.*' %>
<%!
String test ()
{
List<Object> listObjectClasses = null;
if (listObjectClasses==null || listObjectClasses.size()==0)
return "";
String sImageIconFile = null;
for (Object objectClass : listObjectClasses)
{
//sImageIconFile = "active-directory-objectClass-" +
(String)objectClass + ".png";
}
boolean isImageIconFileExist = false;
if (! (sImageIconFile==null || sImageIconFile.isEmpty()))
{
sImageIconFile = "images/" + sImageIconFile;
//File fileImageIcon = new File (application.getRealPath
(sImageIconFile));
//isImageIconFileExist = fileImageIcon.exists ();
}
return (sImageIconFile==null || sImageIconFile.isEmpty()) ? "" : "<img
src='" + sImageIconFile + "'/>";
return "";
// This statement above will cause tomcat JDT compiler point error to
line #8。 But if move this line into the above line, then compiler will point
error to the right line number #23
}
%>
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JSP compile exception
----------------------------------------------------------------------------------------------------
org.apache.jasper.JasperException: Unable to compile class for JSP:
An error occurred at line: 8 in the jsp file: /test.jsp
Unreachable code
5: {
6: List<Object> listObjectClasses = null;
7: if (listObjectClasses==null || listObjectClasses.size()==0)
8: return "1";
9:
10: String sImageIconFile = null;
11: for (Object objectClass : listObjectClasses)
Stacktrace:
org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:103)
org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:366)
org.apache.jasper.compiler.JDTCompiler.generateClass(JDTCompiler.java:485)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:379)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:354)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:341)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:657)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:357)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:395)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:339)
javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
org.apache.catalina.filters.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:108)
----------------------------------------------------------------------------------------------------
If I put the test() function into a .java file and use javac to compile it,
javac will point error to right line number.
----------------------------------------------------------------------------------------------------
$ javac Test.java
Picked up _JAVA_OPTIONS: -Dawt.useSystemAAFontSettings=lcd
Test.java:24: 错误: 无法访问的语句
return "";
^
1 个错误
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