How to show database values into graph using jsp?

You need to download the jfreechart api and put the jar file inside the lib folder of apache tomcat. Then restart the tomcat server.

<%@ page import="java.sql.*" %>
<%@ page import="java.io.*" %>
<%@ page import="org.jfree.chart.ChartFactory" %>
<%@ page import="org.jfree.chart.ChartUtilities" %>
<%@ page import="org.jfree.chart.JFreeChart" %>
<%@ page import="org.jfree.chart.plot.PlotOrientation"%>
<%@ page import="org.jfree.data.*" %>
<%@ page import="org.jfree.data.jdbc.JDBCCategoryDataset"%>
<%@ page import="org.jfree.chart.ChartPanel"%>

<%
String query="SELECT * from chart";
JDBCCategoryDataset dataset=new JDBCCategoryDataset("jdbc:mysql://localhost:3306/chart",
"com.mysql.jdbc.Driver","root","root");

dataset.executeQuery( query);
JFreeChart chart = ChartFactory.createLineChart("Test", "Id", "Score",
                                dataset, PlotOrientation.VERTICAL, true, true, false);
                ChartPanel chartPanel = new ChartPanel(chart);
                chartPanel.setPreferredSize(new java.awt.Dimension(500, 270));
                ApplicationFrame f = new ApplicationFrame("Chart");
                f.setContentPane(chartPanel);
                f.pack();
                f.setVisible(true);

try
{
ChartUtilities.saveChartAsJPEG(new File("C:/chart.jpg"), chart, 400, 300);
}
catch (IOException e)
{
System.out.println("Problem in creating chart.");
}
%>