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Stevn
Asked: 2020-05-16 10:50:41 +0800 CST 2020-05-16 10:50:41 +0800 CST

Create JSTL Accumulator

  • 772

I am creating a page using JSTL and I want to create a variable that accumulates a total within twoforEach

<c:forEach var="mesas" items="${result.cuentas.mesas}">
  <c:forEach var="saldoMesa" items="${mesas.saldo}">
    Aqui quiero que mi variable se acumule
  </c:forEach>
</c:forEach>

That's my code, and I want to print such a variable in a div.

java

1 Answers

  1. Best Answer

    You can use <c:set>:

    <c:set var="contador" value="${0}" />
<c:forEach var="mesas" items="${result.cuentas.mesas}">
    <c:forEach var="saldoMesa" items="${mesas.saldo}">
        <c:set var="contador" value="${contador + saldoMesa}" />
    </c:forEach>
</c:forEach>
<div>
    Resultado: ${contador}
</div>
    • 2