We Keep Coding

how can get dropdown selected value in textbox in jsp

i want selected value in input text field in jsp how to do please help? I am new with jsp.
<select class="leavetype" name="leavetype">
<option value="10">CL</option>
<option value="7">ML</option>
<option value="12">SL</option>
<option value="20">EL/PL</option>
<option value="5">CPL</option>
</select>
<input type="text" name="leave"/>

See this video:- https://www.youtube.com/watch?v=89rRD04QZE4
Hope so it will help you.
In jsp page you may write. ${param.leavetype}.

You can achieve through javascript by using onChange function. Within in function need to do like this document.getElementById ("leave").value = data.value;
Refer this Answer

Add one more option field in the Struts2 select tag

i have one struts 2 select tag like below.
<s:select list="myList" listKey="myListVal" listValue="myListDesc"></s:select>
it rendered as below
<select data-inputs="myListInput" >
<option value="myListVal1" >myListDesc1</option>
<option value="myListVal2" >myListDesc2</option>
<option value="myListVal3" >myListDesc3</option>
</select>
i want to add one more option field with null value
<option value="" ></option>
to the Option field with modification in the list.
In struts 1 it is possible like below
<html:option value=""></html:option>
like that is it possible in the struts 2
note:i couldn't able to modifiy the list before the page load in the java

There is an Attribute called emptyOption in the select tag.
It worked as below.
<s:select list="myList" listKey="myListVal" listValue="myListDesc" emptyOption="true" ></s:select>

if you want to add one more option field with null value at the begining of the list you can use headerKey & headerValue attribute of s:select tag.
Check example given below.
<s:select list="myList" listKey="myListVal" listValue="myListDesc" headerKey="0" headerValue="" ></s:select>
So the first element of your list will be empty & it's value will be 0(zero) here.
It will be render as
<select data-inputs="myListInput" >
<option value="" >0</option>
<option value="myListVal1" >myListDesc1</option>
<option value="myListVal2" >myListDesc2</option>
<option value="myListVal3" >myListDesc3</option>
</select>
You can set any value on place of 0 (zero).
Hope this will help you.

How to avoid the duplicate entry of select box option while edit page?

Could anyone please explain me how to avoid the duplicate enters of records in to the select box options during editing the page.I am using java to develop web application I am very new to that,I need to remove the duplicates from the select box option while editing.Could anyone please help me .
Sample Code
<td><select property="employeestatus" value="" id="employeestatus">
<c:if test="${employee.employeestatus!=null}">
<option value="${employee.employeestatus}">${employee.employeestatus}</option>
</c:if>
<option value="">Select</option>
<option value="Active">Active</option>
<option value="Terminated">Terminated</option>
<option value="Deceased">Deceased</option>
<option value="Resigned">Resigned</option>
<option value="InActive">InActive</option>
</select>
<html:errors property="employeestatus"/>
<p id="employeestatus" style="color:red"/>
</td>

I would suggest to add the selected attribute on the option corresponding to your "employeestatus" variable instead of duplicating this option on the first line.
See HTML option selected Attribute
By the <html:errors ...>, I gess you use Struts 1. If it's true, I would use the
<html:select ...> tag and
<html:options or optionsCollection ...>
with java Map store in some context (servlet, session or request) to configure options. That struts tag will select the good option corresponding to your variable value.
See Struts <html:select ...> doc

how to display a default option in a dropdown list

Given
<html:select property="loginPathId" style="width:190px">
<option value=""></option>
<html:optionsCollection property="loginPath" value="id" label="displayName"/>
</html:select>
Right now, it is a dropdown list with an empty default value. how do i populate it by default with say option value=1?
Can this be done without using jQuery, and only with struts, java, javascript and html?

Inside the option you wanted selected:
<option selected="selected">value</option>

<html:select property="status" value="...your status choise here...">
<html:optionsCollection name="loginPath" label="displayName" value="id" />
</html:select>

how to retrieve multiple selected values from <select multiple > in java code?

code is below:
<select name="merTransactionTypeId" class="cbox" multiple>
<!--
<option value="0" <%=request.getParameter("merTransactionTypeId")!=null?"0".equalsIgnoreCase(request.getParameter("merTransactionTypeId"))?"selected":"":""%>>All</option>
-->
<option value="2" <%=request.getParameter("merTransactionTypeId")!=null?"2".equalsIgnoreCase(request.getParameter("merTransactionTypeId"))?"selected":"":""%>>Reload</option>
<option value="1" <%=request.getParameter("merTransactionTypeId")!=null?"1".equalsIgnoreCase(request.getParameter("merTransactionTypeId"))?"selected":"":""%>>Sale</option>
<option value="5" <%=request.getParameter("merTransactionTypeId")!=null?"5".equalsIgnoreCase(request.getParameter("merTransactionTypeId"))?"selected":"":""%>>CCMS_Recharge</option>
<option value="6" <%=request.getParameter("merTransactionTypeId")!=null?"6".equalsIgnoreCase(request.getParameter("merTransactionTypeId"))?"selected":"":""%>>Loyalty_Award</option>
<option value="7" <%=request.getParameter("merTransactionTypeId")!=null?"7".equalsIgnoreCase(request.getParameter("merTransactionTypeId"))?"selected":"":""%>>Loyalty_Redeem</option>
<option value="16" <%=request.getParameter("merTransactionTypeId")!=null?"16".equalsIgnoreCase(request.getParameter("merTransactionTypeId"))?"selected":"":""%>>FCC_Reload</option>
<option value="11" <%=request.getParameter("merTransactionTypeId")!=null?"11".equalsIgnoreCase(request.getParameter("merTransactionTypeId"))?"selected":"":""%>>Tracking</option>
<option value="12" <%=request.getParameter("merTransactionTypeId")!=null?"12".equalsIgnoreCase(request.getParameter("merTransactionTypeId"))?"selected":"":""%>>Fund_Transfer_From_Card</option>
</select>
i am trying to retrieve values from dropdown with code in scriplet as
<% String[] selectedTransactionTypes = request.getParameterValues("merTransactionTypeId"); %>
...but it's returning null. Please help me out.

Apparently the listbox isn't enclosed in the same <form>, or there's even no means of a <form>, or maybe you tried to access it at the wrong moment (e.g. before form submit), or maybe there's a typo in the parameter name (use getParameterNames() to view them all).
That said, I strongly recommend you to leave the old fashioned scriptlets aside and go ahead with a servlet class to preprocess and postprocess the request and taglibs/EL to control the flow and access data in JSP. It will make your code much cleaner.