How to work with POST method in jsp page
This is detailed JSP code, how to use POST method
instead of GET method in jsp page. GET is default method for sending the request
to the server. The difference between these two methods has been described
below:
Difference between GET and POST
GET:
1. URL Changes to the submitted script name, appended with a list of each variable with the value.
2. Use only if the number of variable to be used in a form are very
less.
3. Never use GET forms when asking for login ID and passwords.
4. Even hidden variables are shown as a part of the URL.
5. Web servers might complain about long URLs being
submitted. A lot of times a URL 255 char or more is a problem.
|
POST:
1. This is the best way of submitting forms to the web server.
2. There is no limitation on the number of Variables passed from
the form.
3. This is a transparent way of transmitting variables to the web
server where hidden variable are always hidden! |
jsp_with_post_method.jsp: Using POST method is
nothing different than using GET method as request method in JSP. For this we
just need to set the value 'POST' for the 'method' attribute of
html 'form' element.
<HTML>
<HEAD>
<TITLE>first page...create session</TITLE>
</HEAD>
<BODY bgcolor="#6E6E6E">
<% String name = "ravi";
session.setAttribute("user", name);
%>
// use POST method to avoid show data in url
<FORM NAME="form1" ACTION="jsp_with_post_method.jsp" METHOD="POST">
<TABLE bgcolor="#D8D8D8">
<tr>
<td> Enter name </td>
<td><input type="text" name="txtName"></td>
</tr>
<tr>
<td> Enter Email id </td>
<td><input type="text" name="email"></td>
</tr>
<tr align="center"><td></td>
<td><INPUT TYPE="submit" VALUE="show"></td>
</FORM>
<%
if (request.getParameter("txtName") != null &&
request.getParameter("txtName") != null) {
if (!(request.getParameter("txtName").equals("")) &&
!(request.getParameter("txtName").equals(""))) {%>
<tr>
<td> Your name is </td>
<td><%=request.getParameter("txtName")%></td>
</tr>
<tr>
<td> Email id is </td>
<td><%=request.getParameter("email")%></td>
</tr>
<%}
}
%>
</TABLE>
</body>
</html>
|
Save this
code with extension .jsp in your application directory ("user"
directory, in our case) in tomcat server. To run this application
first start Tomcat server by click on startup.bat file in
tomcat-6.0.16/bin then open browser and type the url http://localhost:8080/user/jsp_with_post_method.jsp in address
bar.
Enter name and email id in the appropriate text box and
click on show button.
Download source
code
|
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