JSTL SQL Query Tag <sql:query> Example

JSTL Query Tag provides capability to fetch the data from databased by executing query directly from JSP and it can be stored in a variable to use later with the help of scope attribute.

JSTL SQL Query Tag has following attributes.

1. datasource Attribute: Specifies the datasource. Make sure that you already created datasource using serDataSource tag before writing query.

2. sql Attribute: Specifies the SQL statement to run on database.

3. var Attribute: Store the result of SQL statement.

Syntax-
<sql:query

  var="<string>"

  scope="<string>"

  sql="<string>"

  dataSource="<string>"

  startRow="<string>"

  maxRows="<string>"/>


JSP SQL <sql:query> tag Example:
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
    pageEncoding="ISO-8859-1"%>
<%@ taglib prefix="sql" uri="http://java.sun.com/jsp/jstl/sql"%>

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" 
    "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>JSTL SQL Tags - setDataSource Example</title>
</head>
<body>

 <sql:setDataSource driver="com.mysql.jdbc.Driver"
            url="jdbc:mysql://localhost:3306/database_name"
            var="localSource" 
            user="database_user"  
            password="database_password"/>

 <sql:query dataSource="${localSource}" var="result">
SELECT * from Employees;
</sql:query>
 
<table border="1" width="100%">
<tr>
<th>Emp ID</th>
<th>First Name</th>
<th>Last Name</th>
<th>Age</th>
</tr>
<c:forEach var="row" items="${result.rows}">
<tr>
<td><c:out value="${row.id}"/></td>
<td><c:out value="${row.first}"/></td>
<td><c:out value="${row.last}"/></td>
<td><c:out value="${row.age}"/></td>
</tr>
</c:forEach>
</table>
</body>
</html>

Now try to access above JSP, which should display the following result:

Emp ID First Name Last Name Age
1111 Dinesh Rajput 27
2222 Sweety Rajput 24




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