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How to get the selected value from drop down list in jsp?

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难免孤独
难免孤独 2020-12-31 08:25
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  • 萌比男神i
    2020-12-31 08:45

    Direct value should work just fine:

    var sel = document.getElementsByName('item');
var sv = sel.value;
alert(sv);

    The only reason your code might fail is when there is no item selected, then the selectedIndex returns -1 and the code breaks.

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  • 滥情空心
    2020-12-31 08:45 
        <%-- if you want to select value from drop-downlist here is jsp code. --%>
    <body>
    <form name="f1" method="get" action="#">
       <select name="clr">
           <option>Red</option>
           <option>Blue</option>   
           <option>Green</option>
           <option>Pink</option>
       </select>
     <input type="submit" name="submit" value="Select Color"/>
    </form>
    <%-- To display selected value from dropdown list. --%>
     <% 
                String s=request.getParameter("clr");
                if (s !=null)
                {
                    out.println("Selected Color is : "+s);
                }
      %>
</body>
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  • 轻奢々
    2020-12-31 08:55

    use jquery

    $("#item").change(function({
    var x=$(this).val();
});

    Your value will be in x variable, use this variable value in your jsp, like this {x} this statement will give the value

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  • 灰色年华
    2020-12-31 08:56

    I've got one more additional option to get value by id:

    var idElement = document.getElementById("idName");
var selectedValue = idElement.options[idElement.selectedIndex].value;

    It's a simple JavaScript solution.

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