ResultSet to Pagination

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How do I convert Resultset object to a paginated view on a JSP?

For example, this is my query and result set:

pst = con.prepareStatement("select userName, job, place from contact");
rs = pst.executeQuery();

To start, you need to add one or two extra request parameters to the JSP: firstrow and (optionally) rowcount. The rowcount can also be left away and definied entirely in the server side.

Then add a bunch of paging buttons to the JSP: the next button should instruct the Servlet to increment the value of firstrow with the value of rowcount. The previous button should obviously decrement the value of firstrow with the value of rowcount. Don't forget to handle negative values and overflows correctly! You can do it with help of SELECT count(id).

Then fire a specific SQL query to retrieve a sublist of the results. The exact SQL syntax however depends on the DB used. In MySQL and PostgreSQL it is easy with LIMIT and OFFSET clauses:

private static final String SQL_SUBLIST = "SELECT id, username, job, place FROM"
    + " contact ORDER BY id LIMIT %d OFFSET %d";

public List<Contact> list(int firstrow, int rowcount) {
    String sql = String.format(SQL_SUBLIST, firstrow, rowcount);

    // Implement JDBC.
    return contacts;
}

In Oracle you need a subquery with rownum clause which should look like:

private static final String SQL_SUBLIST = "SELECT id, username, job, place FROM"
    + " (SELECT id, username, job, place FROM contact ORDER BY id)"
    + " WHERE ROWNUM BETWEEN %d AND %d";

public List<Contact> list(int firstrow, int rowcount) {
    String sql = String.format(SQL_SUBLIST, firstrow, firstrow + rowcount);

    // Implement JDBC.
    return contacts;
}

In DB2 you need the OLAP function row_number() for this:

private static final String SQL_SUBLIST = "SELECT id, username, job, place FROM"
    + " (SELECT row_number() OVER (ORDER BY id) AS row, id, username, job, place"
    + " FROM contact) AS temp WHERE row BETWEEN %d AND %d";

public List<Contact> list(int firstrow, int rowcount) {
    String sql = String.format(SQL_SUBLIST, firstrow, firstrow + rowcount);

    // Implement JDBC.
    return contacts;
}

I don't do MSSQL, but it's syntactically similar to DB2. Also see this topic.

Finally just present the sublist in the JSP page the usual way with JSTL c:forEach.

<table>
    <c:forEach items="${contacts}" var="contact">
        <tr>
            <td>${contact.username}</td>
            <td>${contact.job}</td>
            <td>${contact.place}</td>
        </tr>
    </c:forEach>
</table>
<form action="yourservlet" method="post">
    <input type="hidden" name="firstrow" value="${firstrow}">
    <input type="hidden" name="rowcount" value="${rowcount}">
    <input type="submit" name="page" value="next">
    <input type="submit" name="page" value="previous">
</form>

Note that some may suggest that you need to SELECT the entire table and save the List<Contact> in the session scope and make use of List#subList() to paginate. But this is far from memory-efficient with thousands rows and multiple concurrent users.

For ones who are interested in similar answer in JSF/MySQL context using h:dataTable component, you may find this article useful. It also contains some useful language-agnostic maths to get the "Google-like" pagination nicely to work.

JDBC ResultSet Pagination, The first time the result set display servlet is invoked, the servlet should execute a select count(*) query and save the row count as an HttpSession  What is Pagination in SQL Server? In terms of the SQL Server, the aim of the pagination is, dividing a resultset into discrete pages with the help of the query. When the OFFSET and FETCH arguments are used in with the ORDER BY clause in a SELECT statement, it will be a pagination solution for SQL Server.

This Oracle example is wrong.

Yes, in the outer select whe have good ROWNUM values, but it is still pseudo column so we can not use BETWEEN on it. We need one more select.

The right sql code is:

SELECT c.*
  FROM (SELECT c.*, ROWNUM as rnum
          FROM (SELECT id, username, job, place FROM contact ORDER BY id) c) c
 WHERE c.rnum BETWEEN 5 AND 10

Comrades, using solid sql string and Statement class is SLOOOW. Oracle have to parse your SQL every time your execute it.

//Slooow example
Satement stmt = con.createStatement();
ResultSet rs = stmt.executeQuery("select * from my_table where id = 11");

Use PreparedStatement and binding parameters.

   //Faster example
   PreparedStatement ps = conn.getPrepareStatement("select * from my_table where id = ?");
   ps.setInt(1, 11);

And fastest solution is put your sql in oracle stored procedure and use CallableStatement to call it.

//Fastest example
CallableStatement cs = conn.prepareCall("{? = call my_plsql_function(?)}");
cs.setInt(1, 11);

Why Most Programmers Get Pagination Wrong – Java, SQL and jOOQ., Pagination is one of those things that almost everyone gets wrong for really care about the total number of objects that are in my result set. Pagination of results from a select statement is vital in SQL server programming. Nowadays web apps are becoming the preferred interface even for enterprise application. Delivering only the least required data to the user interface is one among the vital criteria for improving the performance of web app or even client-server application.

Paginating large SQL-Results, I want to paginate a large result set from an SQL query on a website where I use Spring-JDBC for querying and Displaytag for display. I thought about it for a  The paging of a large database resultset in Web applications is a well known problem. In short, you don't want all the results from your query to be displayed on a single Web page, so some sort of paged display is more appropriate.

Look up the Value List Pattern, and apply that. That's typically the best way to handle these kinds of things.

Pagination best practices, Classic pagination layout. Now, the most common way of sampling a result set is to split it into multiple pages or subsets of data. One such  ResultSet to Pagination. Как преобразовать объект Resultset в разбитый на страницы вид на JSP? Например, это мой запрос и набор результатов: pst = con.prepareStatement("select userName, job, place from contact"); rs = pst.executeQuery();

You can use displaytag for paigination or resultset but u download some jar file from displattag

first you create one servlet StudentList.java

public class StudentList extends HttpServlet 

{ public void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

        ArrayList al=new ArrayList();
        StudentDao stdo=new StudentDao(); // this is DAO Class (Data Acccess Object)

        try
        {
            al=stdo.getStudentList(); //getstudent list dao method
        }
        catch (SQLException e) 
        {
            e.printStackTrace();
        }
        catch (Exception e) 
        {
            e.printStackTrace();
        }
        request.setAttribute("al",al);

        RequestDispatcher rd=request.getRequestDispatcher("StudentPaging.jsp");
        rd.forward(request,response);

}

}

// dao method

public ArrayList getStudentList() throws SQLException,Exception
{
    ArrayList ai=new ArrayList();
    Connection con=null;
    Statement st=null;
    ResultSet rs=null;
    Date dt=new Date();
    SimpleDateFormat sdf=new SimpleDateFormat("dd/MM/yyyy");
    StudentInformation sdata=null;

    con=MyConnection.creatConnection();
    if(con!=null)
    {
        st=con.createStatement();
        String select="select * from STUDENT";
        System.out.println(select);

        rs=st.executeQuery(select);
        if(rs!=null)
        {
            while(rs.next())
            {
                sdata=new StudentInformation();
                sdata.setSid(rs.getString("SID"));
                sdata.setFirstName(rs.getString("FIRSTNAME"));
                sdata.setMiddleName(rs.getString("MIDDLENAME"));
                sdata.setLastName(rs.getString("LASTNAME"));
                dt=rs.getDate("SDATE");
                sdata.setDateofbirth(sdf.format(dt));
                sdata.setGender(rs.getString("GENDER"));
                sdata.setAddress(rs.getString("ADDRESS"));
                sdata.setHigestQulification(rs.getString("HIQULIFICATION"));
                sdata.setLanguageKnow(rs.getString("LANGUAGE"));
                sdata.setHobby(rs.getString("HOBBY"));
                sdata.setTermCondition(rs.getString("TERMCON"));
                ai.add(sdata);
            }
        }
    }
    return ai;
}

Query pagination with JPA and Hibernate, Learn how to use pagination with JPA and Hibernate to restrict the size of the underlying JDBC result set for entity queries or DTO projections. And then the pagination index lets you know that it is not in the first or second page of results. That’s when it’s time to refactor. But knowing that you have had 2 pages of results that didn’t work out of a lot more pages is the only possible way to know if you should refactor, I think.

JDBC ResultSet Paging[URGENT] (JDBC and Relational Databases , give me a solution to implement paging with the Jdbc ResultSet. I have more than a thousand record in the database table and i need to display only few records at   Pagination is common in Web-based applications: The user inputs a set of criteria, which runs a query and then lets the user click the Previous and Next buttons to page through the result set. To achieve this paging functionality, the application needs to be able to get a certain set of rows from the query.

JDBC basics pagination · GitHub, String query = "SELECT * FROM messages LIMIT 5 OFFSET 10"; // OR LIMIT 10, 5. Statement st = connect.createStatement(ResultSet. The following image shows how records are broken into pages. Now assume that the result set is updated by five new records while we are on the first page. The following image shows the current

How to Do Pagination in Oracle: SQL Query With Example, Thankfully, Oracle database provides a convenient method row_number() that can be used to provide a unique row number to each row in result  The result set reflects changes made to the underlying data source while the result set remains open. The default ResultSet type is TYPE_FORWARD_ONLY. Note: Not all databases and JDBC drivers support all ResultSet types. The method DatabaseMetaData.supportsResultSetType returns true if the specified ResultSet type is supported and false otherwise.

Comments
  • Suppose that database insertions and deletions have been happening while the user is looking at one page. The row numbers will not be stable over time, I think? The effect could be to give the user some unexpected changes in position.
  • This is a non-concern. You don't want to view an already deleted item or miss edited data. The only resort to that would be to haul the entire DB table into Java's memory and work on that only, but you don't want to do that.
  • @BalusC - wow. Awesome answer. I can put that to good use myself.
  • BalusC, this is a good compilation but Oracle sql is wrong. I write correct sql in my answer.
  • Your Oracle query doesn't work. You can't use BETWEEN with ROWNUM if the lower bound is > 1, because each row will be filtered before a rownum value is assigned to it. So "where ROWNUM BETWEEN 2 and xxx" always return an empty result set. See stackoverflow.com/a/13740166/191367
  • This is not very efficient if you have a resultset with thousands of rows. Rather do the paging at database level.