Question

I’ve to create a dynamic html table using the values configured in a table. I’m using JSP with MVC architecture.

I’ve a row number, column number and value fields in table. If the values are 1,5 and HELLO correspondingly, then I’ve to display this HELLO in row 1 and column 5.

The table structure is like the following.

row column   value
 1     5     value1
 2     8     value2  

Any ideas?

Answer 1

You need to collect the data in a String[][] first:

int rows = getMaxRowNumberFromDB();
int cols = getMaxColNumberFromDB();
String[][] values = new String[rows][cols];

// ...

while (resultSet.next()) {
    int row = resultSet.getInt("row");
    int col = resultSet.getInt("col");
    String value = resultSet.getString("value");
    values[row][col] = value;
}

(note that array indexes are zero based, you may want to substract 1 from row and col first)

Then display it using JSTL c:forEach (or any data iterating tag your “MVC architecture” thing is using) in JSP:

<table>
    <c:forEach items="${values}" var="row">
        <tr>
            <c:forEach items="${row}" var="value">
                <td>${value}</td>
            </c:forEach>
        </tr>
    </c:forEach>
</table>