if/else statements inside jsps

41 New Member

The if else statement inside my jsp is not working, it gives me the following error:

Expand|Select|Wrap|Line Numbers

 
type Exception report
 
message 
 
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
 
An error occurred at line: 51 in the jsp file: /website/weather.jsp

Generated servlet error:

The operator > is undefined for the argument type(s) String, int
 
    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
 
An error occurred at line: 51 in the jsp file: /website/weather.jsp

Generated servlet error:

The operator > is undefined for the argument type(s) String, int
 
    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.

Expand|Select|Wrap|Line Numbers

  
<%@ page import="java.util.*,java.io.*" %>
 
<html>

<head>
 
<meta http-equiv="refresh" content="10">
 
<LINK REL="stylesheet" TYPE="text/css" HREF="stylesheet1.css">
 
</head>
 
<body>
 
<hr></hr>
 
<center>
 
<h1> 
 
 Weather Forecast</h1>

 <br>
 
 <a href="test.html"> Local Five day forecast </a>
 
 <br><br>
 
 <table border=1   cellpadding=5 cellspacing=0 width="50%">

<tr><th colspan=2>Todays Temperature </th></tr>
 
<tr ><th>Outlook</th> <TD><center><IMG SRC="sunny.gif" ALT="S" BORDER=0 WIDTH=100 HEIGHT=100 ></center></TD></tr>
 
 <% 
 
  String tempString;

  BufferedReader dataFile1 = null;

   try {

   //String[] temp = {"Temperature", "Light"};

   int recCount1 = 0;

    FileReader dFile1 = new FileReader("w:/www/DataFile1.txt");

       dataFile1 = new BufferedReader(dFile1);

    tempString = dataFile1.readLine();

    %>
 
     <% if (tempString > 30) {  %>
 
   <img src="sunny.gif">
 
<% } else { %>

    <img src="rainy.gif">

<%} %>
 
    <tr><th>Temperature (Degree Celsius) :</th> <td><%=tempString%></td></tr> 

    <%
 
    while(tempString != null){
 
%>
 
<%    
 
     recCount1++;
 
     tempString = dataFile1.readLine();
 
    }

   }

   catch (FileNotFoundException e) {

   System.err.println("FileStreamsTest: " + e);

  }

  catch(IOException iOE) {

   iOE.printStackTrace();

  }

  finally {

   dataFile1.close();

  }
 
%>
 
</table>

<br><br><br>
 
<table border=1   cellpadding=5 cellspacing=0 width="50%">

<tr><th colspan=2>Todays Light Intensity</th></tr>
 
<tr ><th>Outlook</th> <TD><center><IMG SRC="sunny.gif" ALT="S" BORDER=0 WIDTH=100 HEIGHT=100 ></center></TD></tr>
 
 <% 
 
  String valString;

  BufferedReader dataFile = null;

   try {
 
   int recCount = 0;

    FileReader dFile = new FileReader("w:/www/DataFile2.txt");

       dataFile = new BufferedReader(dFile);

    valString = dataFile.readLine();
 
    %>

        <tr><th>Light Intensity (Lux) :</th><td><%=valString%></td> </tr>

    <%
 
    while(valString != null){
 
%>
 
<%    
 
     recCount++;
 
     valString = dataFile.readLine();
 
    }

   }

   catch (FileNotFoundException e) {

   System.err.println("FileStreamsTest: " + e);

  }

  catch(IOException iOE) {

   iOE.printStackTrace();

  }

  finally {

   dataFile.close();

  }
 
%>

 </table>
 
<br>

<br>

<br>

<br>

<br>

<br>
 
<hr></hr>
 
</body>

</html>

Feb 22 '07 #1

Subscribe Reply

3161

abctech

157

New Member

You've declared tempString as String and comparing it with an int in 'if'. Perhaps thats why you are getting an error.

Feb 22 '07 #2

r035198x

13,262

MVP

The if else statement inside my jsp is not working, it gives me the following error:

Expand|Select|Wrap|Line Numbers

type Exception report

message

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

An error occurred at line: 51 in the jsp file: /website/weather.jsp

Generated servlet error:

The operator > is undefined for the argument type(s) String, int

    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

An error occurred at line: 51 in the jsp file: /website/weather.jsp

Generated servlet error:

The operator > is undefined for the argument type(s) String, int

    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.

Expand|Select|Wrap|Line Numbers

<%@ page import="java.util.*,java.io.*" %>

<html>

<head>

<meta http-equiv="refresh" content="10">

<LINK REL="stylesheet" TYPE="text/css" HREF="stylesheet1.css">

</head>

<body>

<hr></hr>

<center>

<h1>

Weather Forecast</h1>

<br>

<a href="test.html"> Local Five day forecast </a>

<br><br>

<table border=1 cellpadding=5 cellspacing=0 width="50%">

<tr><th colspan=2>Todays Temperature </th></tr>

<tr ><th>Outlook</th> <TD><center><IMG SRC="sunny.gif" ALT="S" BORDER=0 WIDTH=100 HEIGHT=100 ></center></TD></tr>

<%

String tempString;

BufferedReader dataFile1 = null;

try {

//String[] temp = {"Temperature", "Light"};

int recCount1 = 0;

    FileReader dFile1 = new FileReader("w:/www/DataFile1.txt");

     dataFile1 = new BufferedReader(dFile1);

    tempString = dataFile1.readLine();

    %>

     <% if (tempString > 30) { %>

<img src="sunny.gif">

<% } else { %>

<img src="rainy.gif">

<%} %>

    <tr><th>Temperature (Degree Celsius) :</th> <td><%=tempString%></td></tr>

    <%

    while(tempString != null){

%>

<%

     recCount1++;

     tempString = dataFile1.readLine();

    }

}

catch (FileNotFoundException e) {

System.err.println("FileStreamsTest: " + e);

}

catch(IOException iOE) {

iOE.printStackTrace();

}

finally {

dataFile1.close();

}

%>

</table>

<br><br><br>

<table border=1 cellpadding=5 cellspacing=0 width="50%">

<tr><th colspan=2>Todays Light Intensity</th></tr>

<tr ><th>Outlook</th> <TD><center><IMG SRC="sunny.gif" ALT="S" BORDER=0 WIDTH=100 HEIGHT=100 ></center></TD></tr>

<%

String valString;

BufferedReader dataFile = null;

try {

int recCount = 0;

    FileReader dFile = new FileReader("w:/www/DataFile2.txt");

     dataFile = new BufferedReader(dFile);

    valString = dataFile.readLine();

    %>

        <tr><th>Light Intensity (Lux) :</th><td><%=valString%></td> </tr>

    <%

    while(valString != null){

%>

<%

     recCount++;

     valString = dataFile.readLine();

    }

}

catch (FileNotFoundException e) {

System.err.println("FileStreamsTest: " + e);

}

catch(IOException iOE) {

iOE.printStackTrace();

}

finally {

dataFile.close();

}

%>

</table>

<br>

<br>

<br>

<br>

<br>

<br>

<hr></hr>

</body>

</html>

Please, do not start many threads for the same problem

Feb 23 '07 #3

dmjpro

2,476

Top Contributor

r u getting complilation or runtime error ....

Feb 24 '07 #4

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