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JSP CheckBox Example

By: Dorris in JSP Tutorials on 2010年12月27日 [フレーム]

JSP CheckBox is used to create a CheckBox in JSP. The JSP Page allows the user to select more than one option from multiple checkbox and also print the user-defined message that specifies the 'languages' option chosen by the user on submitting the button.

This Tutorial illustrates an elaborate example of 'JSP CheckBox'. To understand and grasp the example we create a CheckBox.jsp page that includes the html tag<input type="checkbox"> to create the checkboxes. The HTML page allows the user to select multiple languages using checkboxes. After submitting the button, the action is performed which displays the selected languages. The method request.getParameter Values("id") is used to return the value of selected checkbox. The for loop is used to execute the code repeatedly till the length of variable i is less than equal to selected position of checkbox. Finally the out.println is used to print the selected checkbox in the browser.

jspCheckBox.jsp

<html>
 <h2>Select Languages:</h2>
 
 <form ACTION="jspCheckBox.jsp">
 <input type="checkbox" name="id"
 value="Java"> Java<BR>
 <input type="checkbox" name="id"
 value=".NET"> .NET<BR>
 <input type="checkbox" name="id" value="PHP">
 PHP<BR>
 <input type="checkbox" name="id"
 value="C/C++"> C/C++<BR>
 <input type="checkbox" name="id"
 value="PERL"> PERL <BR>
 <input type="submit" value="Submit">
 </form>
 <%
 
 String select[] = request.getParameterValues("id"); 
 if (select != null && select.length != 0) {
 out.println("You have selected: ");
 for (int i = 0; i < select.length; i++) {
 out.println(select[i]); 
 }
 }
 %>
 </html>

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