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Naveen
How to create bar chart using database values i.e excellent,good,average fields using jsp?It is like opinion poll.I want to show how many votes are came for excellent,good,average in a graph format.
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November 5, 2012 at 3:01 PM
Here is a jsp code that create bar chart using database values.
<%@ 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"%>
<%
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 .createBarChart3D(
"Test",
"Id",
"Score",
dataset,
PlotOrientation.VERTICAL,true, true, false);
try
{
ChartUtilities.saveChartAsJPEG(new File("C:/chart.jpg"), chart, 400, 300);
}
catch (IOException e)
{
System.out.println("Problem in creating chart.");
}
%>
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