使用jstl的SQL查询的执行时间

Question

I am using jstl to access a database table. After a query has been executed, I need to find its execution time using jstl. I have attached the code I use:

<sql:update dataSource="${conn}" var="addresses">
    ${query}
</sql:update>

Is there a way to find it? I use ${addresses} to find the number of rows affected.

Thanks in advance

Answer 1

A simple solution would be:

<jsp:useBean id="beginUpdate" class="java.util.Date"/>
<sql:update dataSource="${conn}" var="addresses">
    ${query}
</sql:update>
<jsp:useBean id="endUpdate" class="java.util.Date"/>
<c:set var="updateDuration" value="${endUpdate.time - beginUpdate.time}"/>

But this really isn't the best way to accurately time the update. However, if all you need is a general measure of how long it takes, then it's probably fine.