Querying Data with the JSTL in JSP

By: Sathya Narayana Viewed: 153430 times  Printer Friendly Format    


To query data with the JSTL, follow these steps:

  1. Create a new Web application folder called DataAccess inside Tomcat's webapps folder. Create a folder inside it named WEB-INF.

  2. Next you need to give your Web application access to the JSTL by copying the JSTL lib folder into WEB-INF. Be sure to copy the entire lib folder, not just its contents.

  3. You also need to make the MySQL JDBC classes available, which you can find at http://dev.mysql.com/downloads/connector/j/. Once you've downloaded the file, unzip it and copy mysql-connector-java-3.0.9-bin.jar into your webapps folder's WEB-INF/lib directory (the filename may be slightly different if a newer version has been released).

  4. Create the following JSP page in the DataAccess folder as bookList.jsp:

    <%@ taglib prefix="c" uri="http://java.sun.com/jstl/core_rt" %>
    <%@ taglib prefix="sql" uri="http://java.sun.com/jstl/sql_rt" %>
    
    <sql:setDataSource var="datasource"
                     driver="com.mysql.jdbc.Driver"
                        url="jdbc:mysql://localhost/publish"
                       user="publishuser" password="secret"/>
    
    <sql:query var="books" dataSource="${datasource}">
      SELECT id, title, price FROM book
    </sql:query>
    <html>
      <head>
        <title>A First JSP Database</title
      </head>
      <body>
        <table border="1">
          <tr>
             <td>id</td><td>title</td><td>price</td>
          </tr>
    <c:forEach items="${books.rows}" var="row">
          <tr>
            <td><c:out value="${row.id}" /></td>
            <td><c:out value="${row.title}" /></td>
            <td><c:out value="${row.price}" /></td>
          </tr>
    </c:forEach>
       </table>
      </body>
    </html>
    
  5. Start Tomcat.

  6. Start a Web browser, and navigate to http://localhost:8080/DataAccess/bookList.jsp.



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