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POcan't print the request.getparameter value in jsp page
 

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  1. POcan't print the request.getparameter value in jsp page
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    <p>i am new to jsp i try to print a my database value in my jsp page, the below program work fine while i directly print the s1="january" and s2="2012" value,both datatype VARCHAR</p> <pre><code>String QueryString = "SELECT reading,totalcost,paiddate,receiptnumber FROM userseven WHERE readingmonth = '"+s1+"' AND readingyear= '"+s2+"'"; </code></pre> <p>if i try to print my request.getparameter("t1")( t1 contain january ) value request.getparameter("t2");(t2 contain 2011)</p> <p>it won't print any think,</p> <pre><code>String QueryString = "SELECT reading,totalcost,paiddate,receiptnumber FROM userseven WHERE readingmonth = '"+s11+"' AND readingyear= '"+s22+"'"; &lt;body&gt; &lt;form action="yeardb.jsp"&gt; &lt;table border="1" &gt; &lt;tr&gt; &lt;td&gt;Select Year&lt;/td&gt; &lt;td&gt; &lt;select name="t1"&gt; &lt;option value="2013"&gt;2013&lt;/option&gt; &lt;option value="2012"&gt;2012&lt;/option&gt; &lt;option value="2011"&gt;2011&lt;/option&gt; &lt;option value="2010"&gt;2010&lt;/option&gt; &lt;/select&gt; &lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td&gt; &lt;tr&gt;&lt;td&gt;Select Month:&lt;/td&gt; &lt;td&gt; &lt;select name="t2"&gt; &lt;option value="january"&gt;JANUARY&lt;/option&gt; &lt;option value="march"&gt;March&lt;/option&gt; &lt;option value="may"&gt;May&lt;/option&gt; &lt;option value="july"&gt;JULY&lt;/option&gt; &lt;option value="aug"&gt;AUGUEST&lt;/option&gt; &lt;option value="oct"&gt;OCTOBER&lt;/option&gt; &lt;option value="dec"&gt;DECEMBER&lt;/option&gt; &lt;/select&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td&gt; &lt;input type= "submit" value="submit" &gt; &lt;/td&gt;&lt;/tr&gt; &lt;/table&gt; &lt;/form&gt; &lt;/body&gt; yeardb.jsp ******** &lt;!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"&gt; &lt;%@page import="com.mysql.jdbc.Driver"%&gt; &lt;%@ page import="java.sql.*" %&gt; &lt;%@ page import="java.io.*" %&gt; &lt;html&gt; &lt;head&gt; &lt;title&gt;display data from the table using jsp&lt;/title&gt; &lt;/head&gt; &lt;body&gt; &lt;h1&gt;welcome&lt;/h1&gt; &lt;% String s11=request.getParameter("t1"); String s22=request.getParameter("t2"); String s1="january"; String s2="2011"; out.print("i am String"+s11); out.print("i am String"+s22); out.print("outside try"); try { out.print("inside try"); String connectionURL = "jdbc:mysql://localhost:3306/horizontal"; Connection connection = null; Statement statement = null; ResultSet rs = null; Class.forName("com.mysql.jdbc.Driver").newInstance(); connection = DriverManager.getConnection(connectionURL, "root", "root"); statement = connection.createStatement(); out.print("before query"); String QueryString = "SELECT reading,totalcost,paiddate,receiptnumber FROM userseven WHERE readingmonth = '"+s1+"' AND readingyear= '"+s2+"'"; out.print("after query"); rs = statement.executeQuery(QueryString); </code></pre> <p>%></p> <pre><code> &lt;TABLE cellpadding="15" border="1" style="background-color: #ffffcc;"&gt; &lt;% out.print("outside while"); while (rs.next()) { out.print("inside while"); %&gt; &lt;TR&gt; &lt;TD&gt;&lt;%=rs.getString(1)%&gt;&lt;/TD&gt; &lt;TD&gt;&lt;%=rs.getString(2)%&gt;&lt;/TD&gt; &lt;TD&gt;&lt;%=rs.getString(3)%&gt;&lt;/TD&gt; &lt;TD&gt;&lt;%=rs.getString(4)%&gt;&lt;/TD&gt; &lt;/TR&gt; &lt;% } %&gt; &lt;% // close all the connections. rs.close(); statement.close(); connection.close(); } catch (Exception ex) { %&gt; &lt;/font&gt; &lt;font size="+3" color="red"&gt;&lt;/b&gt; &lt;% out.println("Unable to connect to database."); } %&gt; &lt;/TABLE&gt;&lt;TABLE&gt; &lt;TR&gt; &lt;button type="submit"&gt;&lt;-- back&lt;/button&gt;&lt;/TD&gt; &lt;/TR&gt; &lt;/TABLE&gt; &lt;/font&gt; </code></pre>
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    1. USGiri
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    1. This table or related slice is empty.
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    1. This table or related slice is empty.
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    1. This table or related slice is empty.
 

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