Servlet Controller cannot access my jsp request values

[Arunkumar Chinnadurai]

Hi Friends,


this is my jsp code

<form name="frmAdminLogin" method="post" style="margin:0px" action="AdminLoginController">
<div class="content_container">
	    	<div class="admin_login_panel">
	        	<div class="login_panel_header">
	            	Login
	            </div>
	            <div class="admin_login_panel_content">
	            	<table width="100%" align="center">
	                	<tr>
	                    	<td class="cell_space" width="40%"> Admin ID</td>
	                        <td class="cell_space" width="60%"> <input type="text" class="input_box_id" id="txtAdminUserName" /></td>
	                    </tr>
	                	<tr>
	                    	<td class="cell_space"> Password</td>
	                        <td class="cell_space"> <input type="password" class="input_box_pwd" id="txtAdminPassword" /></td>
	                    </tr>
	                    <tr>
	                    	<td class="cell_space" colspan="2"><hr style="border:1px solid #fff;" /></td>
	                    </tr>
	                    <tr>
	                    	<td class="cell_space" align="center" colspan="2">
	                        <input type="submit" name="subAdminLogin" onclick="return validate_adminlogin(this.form)" class="button green" value="Submit" /> </td>
	                    </tr>
	                    <tr>
	                    	<td>
	                    		<div id="error_adminlogin"></div>
	                    	</td>
	                    </tr>
	                </table>
	            </div>
	        </div>
	       
	    </div>

this is my servlet code :

protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException 
	{
		if(request.getParameter("subAdminLogin")!=null)			
		{
			if(request.getParameter("subAdminLogin").equals("Submit"))
			{
				l=new Login();				
				l.setEmpID(request.getParameter("txtAdminUserName"));
				l.setPassword(request.getParameter("txtAdminPassword"));
				System.out.println("Admin User ID : "+request.getParameter("txtAdminUserName")+"\t Password : "+request.getParameter("txtAdminPassword"));
				lu=new LoginUtility();
				if(!lu.checkSplCharSet_Text(l.getEmpID()) && !lu.checkSplCharSet_Password(l.getPassword()) && lu.validateUser(l))
				{					
					RequestDispatcher rd1=request.getRequestDispatcher("adminhome.jsp");
					rd1.forward(request, response);
					
					strMsg="Login Successfully....!!!";
					HttpSession sesLogin=request.getSession();
					sesLogin.setAttribute("objLogin", l);	
					
					request.setAttribute("Msg_Status","YES");
					request.setAttribute("Msg_Desc",strMsg);					
				}
				else
				{
					strMsg="Invalid UserName/Password....!  Please enter correct username/passowrd ....!";
					request.setAttribute("Msg_Status","YES");
					request.setAttribute("Msg_Desc",strMsg);				
				}
			}
		}

I`m getting folowing error . please help me out from this.

Admin User ID : null Password : null
The String is : null
java.lang.NullPointerException
at com.tekno.utility.LoginUtility.checkSplCharSet_Text(LoginUtility.java:158)
at com.tekno.controller.AdminLoginController.doPost(AdminLoginController.java:40)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:710)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:263)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:584)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
at java.lang.Thread.run(Unknown Source)
java.lang.NullPointerException
at com.tekno.utility.LoginUtility.checkSplCharSet_Password(LoginUtility.java:177)
at com.tekno.controller.AdminLoginController.doPost(AdminLoginController.java:40)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:710)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:263)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:584)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
at java.lang.Thread.run(Unknown Source)
From Has Record : select * from login where empid='null' and password=md5('null')

[Bear Bibeault]

Here's the important part of the error message:

java.lang.NullPointerException
at com.tekno.utility.LoginUtility.checkSplCharSet_Text(LoginUtility.java:158)
at com.tekno.controller.AdminLoginController.doPost(AdminLoginController.java:40)

It tells you exactly where the problem lies.

[Seetharaman Venkatasamy]

<input type="text" class="input_box_id" id="txtAdminUserName" />
<input type="password" class="input_box_pwd" id="txtAdminPassword" />

because

request.getParameter("txtAdminUserName")

this returns null. Use *name attribute of input tag* to get value on servlet.
replace id with name

[Seetharaman Venkatasamy]

I am too slow

[Arunkumar Chinnadurai]

I`m getting the out put .

i give control id in jsp pages, but in servlet controller i`m getting via name no i have changed the control properties are name..


thanks

[Arunkumar Chinnadurai]

Thanks to Seetharaman Venkatasamy

[Rob Spoor]

Seetharaman Venkatasamy wrote:replace id with name

I would actually not replace the name attribute, but add the id attribute with the same value. The name attribute is mostly used for submitting forms whereas the id attribute has several client side purposes (mostly for CSS and JavaScript).

[Seetharaman Venkatasamy]

Arunkumar Chinnadurai wrote:Thanks to Seetharaman Venkatasamy

You are welcome