Buttons in JSP Table - html

Question

I have JSP page with a table:
<table class="table table-hover">
<tbody>
<thead class="thead-light">
<th scope="col">#</th>
<th scope="col">Number</th>
<th scope="col">Tariff</th>
<th scope="col">Cost</th>
<th scope="col">Action</th>
</thead>
<tbody>
<c:forEach items="${contractsList}" var="contract" varStatus="loop">
<thead>
<th scope="col">${loop.index + 1}</th>
<th>${contract.number}</th>
<th>${contract.tariffName}</th>
<th>TODO</th>
<th><input type="submit" value="Block"></th>
</thead>
</c:forEach>
</tbody>
</table>
How can I make a button in each row send POST request with data from this row? For example, I'm pressing a button in row #2 and it sends post request to some url with number of contract from this row as a request parameter. I tried adding <form> tag but it ruins formatting of the table and for me it's not clear how to pass contract's number as a request parameter in this case.
UPDATE: I did it this way
<tr onclick="showContract('${contract.contractId}')" style="cursor: pointer;">
<script>
function showContract(id) {
var form = document.createElement('form');
document.body.appendChild(form);
form.method = 'post';
form.action = '/client/show_contract';
var input = document.createElement('input');
input.type = 'hidden';
input.name = 'contractId';
input.value = id;
form.appendChild(input);
form.submit();
}
</script>

Answer 1

Easiest way is to put your form tag inside the loop.
<c:forEach items="${contractsList}" var="contract" varStatus="loop">
<form action="..YourServlet" method="post">
<thead>
<th scope="col">${loop.index + 1}</th>
<th>${contract.number}</th>
<th>${contract.tariffName}</th>
<th>TODO</th>
<th><input type="submit" value="Block"></th>
</thead>
<input type="hidden" name="cnumber" value="${contract.number}"/>
<input type="hidden" name="ctarrif" value="${contract.tarrifName}"/>
</form>
</c:forEach>
Then in your servlet just get parameters like you would normally do:
String contractNumber = request.getParameter ("cname");
String tarrifName = request.getParameter ("ctarrif");