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if/else statements inside jsps

41
The if else statement inside my jsp is not working, it gives me the following error:

Expand|Select|Wrap|Line Numbers
  1. type Exception report
  2.  
  3. message 
  4.  
  5. description The server encountered an internal error () that prevented it from fulfilling this request.
  6.  
  7. exception 
  8.  
  9. org.apache.jasper.JasperException: Unable to compile class for JSP
  10.  
  11. An error occurred at line: 51 in the jsp file: /website/weather.jsp
  12. Generated servlet error:
  13. The operator > is undefined for the argument type(s) String, int
  14.  
  15.  
  16.     org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:510)
  17.     org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:375)
  18.     org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
  19.     org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
  20.     javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
  21.  
  22.  
  23. root cause 
  24.  
  25. org.apache.jasper.JasperException: Unable to compile class for JSP
  26.  
  27. An error occurred at line: 51 in the jsp file: /website/weather.jsp
  28. Generated servlet error:
  29. The operator > is undefined for the argument type(s) String, int
  30.  
  31.  
  32.     org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:84)
  33.     org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:328)
  34.     org.apache.jasper.compiler.JDTCompiler.generateClass(JDTCompiler.java:414)
  35.     org.apache.jasper.compiler.Compiler.compile(Compiler.java:297)
  36.     org.apache.jasper.compiler.Compiler.compile(Compiler.java:276)
  37.     org.apache.jasper.compiler.Compiler.compile(Compiler.java:264)
  38.     org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:563)
  39.     org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:303)
  40.     org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
  41.     org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
  42.     javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
  43.  
  44.  
  45. note The full stack trace of the root cause is available in the Apache Tomcat/5.5.17 logs.
  46.  
  47.  
  48.  
  49.  
  50.  
  51.  
  52.  
  53.  
  54.  
  55.  
  56.  
Expand|Select|Wrap|Line Numbers
  1.  
  2. <%@ page import="java.util.*,java.io.*" %>
  3.  
  4.  
  5.  
  6. <html>
  7. <head>
  8.  
  9. <meta http-equiv="refresh" content="10">
  10.  
  11. <LINK REL="stylesheet" TYPE="text/css" HREF="stylesheet1.css">
  12.  
  13. </head>
  14.  
  15. <body>
  16.  
  17. <hr></hr>
  18.  
  19. <center>
  20.  
  21. <h1> 
  22.  
  23.  Weather Forecast</h1>
  24.  <br>
  25.  
  26.  
  27.  <a href="test.html"> Local Five day forecast </a>
  28.  
  29.  <br><br>
  30.  
  31.  <table border=1   cellpadding=5 cellspacing=0 width="50%">
  32. <tr><th colspan=2>Todays Temperature </th></tr>
  33.  
  34. <tr ><th>Outlook</th> <TD><center><IMG SRC="sunny.gif" ALT="S" BORDER=0 WIDTH=100 HEIGHT=100 ></center></TD></tr>
  35.  
  36.  
  37.  <% 
  38.  
  39.   String tempString;
  40.   BufferedReader dataFile1 = null;
  41.    try {
  42.    //String[] temp = {"Temperature", "Light"};
  43.    int recCount1 = 0;
  44.     FileReader dFile1 = new FileReader("w:/www/DataFile1.txt");
  45.        dataFile1 = new BufferedReader(dFile1);
  46.     tempString = dataFile1.readLine();
  47.     %>
  48.  
  49.  
  50.      <% if (tempString > 30) {  %>
  51.  
  52.    <img src="sunny.gif">
  53.  
  54. <% } else { %>
  55.     <img src="rainy.gif">
  56. <%} %>
  57.  
  58.  
  59.  
  60.     <tr><th>Temperature (Degree Celsius) :</th> <td><%=tempString%></td></tr> 
  61.     <%
  62.  
  63.     while(tempString != null){
  64.  
  65.  
  66. %>
  67.  
  68.  
  69.  
  70.  
  71.  
  72. <%    
  73.  
  74.      recCount1++;
  75.  
  76.      tempString = dataFile1.readLine();
  77.  
  78.     }
  79.    }
  80.    catch (FileNotFoundException e) {
  81.    System.err.println("FileStreamsTest: " + e);
  82.   }
  83.   catch(IOException iOE) {
  84.    iOE.printStackTrace();
  85.   }
  86.   finally {
  87.    dataFile1.close();
  88.   }
  89.  
  90. %>
  91.  
  92. </table>
  93. <br><br><br>
  94.  
  95.  
  96. <table border=1   cellpadding=5 cellspacing=0 width="50%">
  97. <tr><th colspan=2>Todays Light Intensity</th></tr>
  98.  
  99. <tr ><th>Outlook</th> <TD><center><IMG SRC="sunny.gif" ALT="S" BORDER=0 WIDTH=100 HEIGHT=100 ></center></TD></tr>
  100.  
  101.  
  102.  <% 
  103.  
  104.   String valString;
  105.   BufferedReader dataFile = null;
  106.    try {
  107.  
  108.    int recCount = 0;
  109.     FileReader dFile = new FileReader("w:/www/DataFile2.txt");
  110.        dataFile = new BufferedReader(dFile);
  111.     valString = dataFile.readLine();
  112.  
  113.     %>
  114.         <tr><th>Light Intensity (Lux) :</th><td><%=valString%></td> </tr>
  115.     <%
  116.  
  117.     while(valString != null){
  118.  
  119. %>
  120.  
  121.  
  122.  
  123.  
  124. <%    
  125.  
  126.      recCount++;
  127.  
  128.      valString = dataFile.readLine();
  129.  
  130.     }
  131.    }
  132.    catch (FileNotFoundException e) {
  133.    System.err.println("FileStreamsTest: " + e);
  134.   }
  135.   catch(IOException iOE) {
  136.    iOE.printStackTrace();
  137.   }
  138.   finally {
  139.    dataFile.close();
  140.   }
  141.  
  142. %>
  143.  </table>
  144.  
  145.  
  146. <br>
  147. <br>
  148. <br>
  149. <br>
  150. <br>
  151. <br>
  152.  
  153. <hr></hr>
  154.  
  155. </body>
  156. </html>
  157.  
  158.  
  159.  
  160.  
Feb 22 '07 #1
3 3140
abctech
157 100+
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 8TB
The if else statement inside my jsp is not working, it gives me the following error:

Expand|Select|Wrap|Line Numbers
  1. type Exception report
  2.  
  3. message 
  4.  
  5. description The server encountered an internal error () that prevented it from fulfilling this request.
  6.  
  7. exception 
  8.  
  9. org.apache.jasper.JasperException: Unable to compile class for JSP
  10.  
  11. An error occurred at line: 51 in the jsp file: /website/weather.jsp
  12. Generated servlet error:
  13. The operator > is undefined for the argument type(s) String, int
  14.  
  15.  
  16.     org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:510)
  17.     org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:375)
  18.     org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
  19.     org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
  20.     javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
  21.  
  22.  
  23. root cause 
  24.  
  25. org.apache.jasper.JasperException: Unable to compile class for JSP
  26.  
  27. An error occurred at line: 51 in the jsp file: /website/weather.jsp
  28. Generated servlet error:
  29. The operator > is undefined for the argument type(s) String, int
  30.  
  31.  
  32.     org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:84)
  33.     org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:328)
  34.     org.apache.jasper.compiler.JDTCompiler.generateClass(JDTCompiler.java:414)
  35.     org.apache.jasper.compiler.Compiler.compile(Compiler.java:297)
  36.     org.apache.jasper.compiler.Compiler.compile(Compiler.java:276)
  37.     org.apache.jasper.compiler.Compiler.compile(Compiler.java:264)
  38.     org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:563)
  39.     org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:303)
  40.     org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
  41.     org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
  42.     javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
  43.  
  44.  
  45. note The full stack trace of the root cause is available in the Apache Tomcat/5.5.17 logs.
  46.  
  47.  
  48.  
  49.  
  50.  
  51.  
  52.  
  53.  
  54.  
  55.  
  56.  
Expand|Select|Wrap|Line Numbers
  1.  
  2. <%@ page import="java.util.*,java.io.*" %>
  3.  
  4.  
  5.  
  6. <html>
  7. <head>
  8.  
  9. <meta http-equiv="refresh" content="10">
  10.  
  11. <LINK REL="stylesheet" TYPE="text/css" HREF="stylesheet1.css">
  12.  
  13. </head>
  14.  
  15. <body>
  16.  
  17. <hr></hr>
  18.  
  19. <center>
  20.  
  21. <h1> 
  22.  
  23. Weather Forecast</h1>
  24. <br>
  25.  
  26.  
  27. <a href="test.html"> Local Five day forecast </a>
  28.  
  29. <br><br>
  30.  
  31. <table border=1 cellpadding=5 cellspacing=0 width="50%">
  32. <tr><th colspan=2>Todays Temperature </th></tr>
  33.  
  34. <tr ><th>Outlook</th> <TD><center><IMG SRC="sunny.gif" ALT="S" BORDER=0 WIDTH=100 HEIGHT=100 ></center></TD></tr>
  35.  
  36.  
  37. <% 
  38.  
  39. String tempString;
  40. BufferedReader dataFile1 = null;
  41. try {
  42. //String[] temp = {"Temperature", "Light"};
  43. int recCount1 = 0;
  44.     FileReader dFile1 = new FileReader("w:/www/DataFile1.txt");
  45.      dataFile1 = new BufferedReader(dFile1);
  46.     tempString = dataFile1.readLine();
  47.     %>
  48.  
  49.  
  50.      <% if (tempString > 30) { %>
  51.  
  52. <img src="sunny.gif">
  53.  
  54. <% } else { %>
  55. <img src="rainy.gif">
  56. <%} %>
  57.  
  58.  
  59.  
  60.     <tr><th>Temperature (Degree Celsius) :</th> <td><%=tempString%></td></tr> 
  61.     <%
  62.  
  63.     while(tempString != null){
  64.  
  65.  
  66. %>
  67.  
  68.  
  69.  
  70.  
  71.  
  72. <%    
  73.  
  74.      recCount1++;
  75.  
  76.      tempString = dataFile1.readLine();
  77.  
  78.     }
  79. }
  80. catch (FileNotFoundException e) {
  81. System.err.println("FileStreamsTest: " + e);
  82. }
  83. catch(IOException iOE) {
  84. iOE.printStackTrace();
  85. }
  86. finally {
  87. dataFile1.close();
  88. }
  89.  
  90. %>
  91.  
  92. </table>
  93. <br><br><br>
  94.  
  95.  
  96. <table border=1 cellpadding=5 cellspacing=0 width="50%">
  97. <tr><th colspan=2>Todays Light Intensity</th></tr>
  98.  
  99. <tr ><th>Outlook</th> <TD><center><IMG SRC="sunny.gif" ALT="S" BORDER=0 WIDTH=100 HEIGHT=100 ></center></TD></tr>
  100.  
  101.  
  102. <% 
  103.  
  104. String valString;
  105. BufferedReader dataFile = null;
  106. try {
  107.  
  108. int recCount = 0;
  109.     FileReader dFile = new FileReader("w:/www/DataFile2.txt");
  110.      dataFile = new BufferedReader(dFile);
  111.     valString = dataFile.readLine();
  112.  
  113.     %>
  114.         <tr><th>Light Intensity (Lux) :</th><td><%=valString%></td> </tr>
  115.     <%
  116.  
  117.     while(valString != null){
  118.  
  119. %>
  120.  
  121.  
  122.  
  123.  
  124. <%    
  125.  
  126.      recCount++;
  127.  
  128.      valString = dataFile.readLine();
  129.  
  130.     }
  131. }
  132. catch (FileNotFoundException e) {
  133. System.err.println("FileStreamsTest: " + e);
  134. }
  135. catch(IOException iOE) {
  136. iOE.printStackTrace();
  137. }
  138. finally {
  139. dataFile.close();
  140. }
  141.  
  142. %>
  143. </table>
  144.  
  145.  
  146. <br>
  147. <br>
  148. <br>
  149. <br>
  150. <br>
  151. <br>
  152.  
  153. <hr></hr>
  154.  
  155. </body>
  156. </html>
  157.  
  158.  
  159.  
  160.  
Please, do not start many threads for the same problem
Feb 23 '07 #3
dmjpro
2,476 2GB
r u getting complilation or runtime error ....
Feb 24 '07 #4

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