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# 차트 관련 예제및 소스 : http://www.java2s.com/Code/Java/CatalogJava.htm
참고사이트 : www.jfree.org
샘플예제 Applet 실행 : http://mimul.com/examples/jfree/jfreechart-1.0.10-demo.jnlp

# 차트 한글 깨짐 현상시 확인

# BarChartBean.java

package util.chart;

import org.jfree.chart.*;
import org.jfree.data.category.*;
import org.jfree.chart.renderer.category.*;
import org.jfree.chart.axis.CategoryAxis;
import org.jfree.chart.axis.CategoryLabelPositions;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.labels.StandardCategoryItemLabelGenerator;
import org.jfree.chart.plot.*;
import java.awt.*;

/**
 * FileName : BarChartBean.java
 * Comment  : 
 * @version : 1.0
 * @author  : sunshiny
 * @date    : 2011. 1. 5.
 */
public class BarChartBean {

	public static void main(String arg[]){
		BarChartBean bcb = new BarChartBean();

		JFreeChart chart = bcb.getBarChart();
		ChartFrame frame1 = new ChartFrame("Bar Chart",chart);
		frame1.setSize(700,250);  
		frame1.setVisible(true);
		frame1.setLocation(100, 200);


	}

	public JFreeChart getBarChart() {
		String titleStr = "차트 타이틀";

		// row keys...
		final String series1 = "First";
		//        final String series2 = "Second";
		//        final String series3 = "Third";

		// column keys...
		final String category1 = "서울";
		final String category2 = "부산";
		final String category3 = "대구";
		final String category4 = "인천";
		final String category5 = "광주";
		final String category6 = "대전";
		final String category7 = "울산";
		final String category8 = "경기";
		final String category9 = "강원";
		final String category10 = "충북";
		final String category11 = "충남";
		final String category12 = "전북";
		final String category13 = "전남";
		final String category14 = "경북";
		final String category15 = "경남";
		final String category16 = "제주";

		// create the dataset...
		final DefaultCategoryDataset dataset = new DefaultCategoryDataset();

		dataset.addValue(1.0, series1, category1);
		dataset.addValue(5.0, series1, category2);
		dataset.addValue(4.0, series1, category3);
		dataset.addValue(27.0, series1, category4);
		dataset.addValue(30.0, series1, category5);
		dataset.addValue(10.0, series1, category6);
		dataset.addValue(11.0, series1, category7);
		dataset.addValue(7.0, series1, category8);
		dataset.addValue(2.0, series1, category9);
		dataset.addValue(16.0, series1, category10);
		dataset.addValue(19.0, series1, category11);
		dataset.addValue(22.0, series1, category12);
		dataset.addValue(23.0, series1, category13);
		dataset.addValue(27.0, series1, category14);
		dataset.addValue(31.0, series1, category15);
		dataset.addValue(12.0, series1, category16);

		JFreeChart chart = ChartFactory.createBarChart(titleStr, "", ""
				, dataset, PlotOrientation.VERTICAL, true,true, false);

		/**
		 * Chart 폰트 설정, 클래스 파일 위치 : package org.jfree.chart.StandardChartTheme.java
		 * 		
		 */
		chart.getTitle().setFont(new Font("sansserif", Font.BOLD, 20));
		chart.getLegend().setItemFont(new Font("sansserif", Font.BOLD, 15));
		chart.getCategoryPlot().setNoDataMessageFont(new Font("sansserif", Font.BOLD, 15));
		chart.getPlot().setNoDataMessageFont(new Font("sansserif", Font.BOLD, 15));

		System.out.println(chart.getPlot().getNoDataMessageFont().getName());

		chart.setBackgroundPaint(Color.WHITE);
		chart.getTitle().setPaint(Color.orange);

		StandardCategoryItemLabelGenerator stdCateGen 
		= new StandardCategoryItemLabelGenerator();
		BarRenderer barRender = new BarRenderer();

		CategoryPlot plot = chart.getCategoryPlot();

		barRender.setItemLabelGenerator(stdCateGen); // 그래프별 값 출력
		plot.setRenderer(barRender);                 // 그래프별 값 출력

		/*		plot.setDomainAxis(new CategoryAxis("지역"));
		plot.setRangeAxis(new NumberAxis("수치"));
		plot.setOrientation(PlotOrientation.VERTICAL);
		 */

		//		plot.setDomainGridlinesVisible(true);
		plot.setRangeGridlinesVisible(true); // 가로 그리드 라인 보이기

		plot.setRangeGridlinePaint(Color.GRAY); 
		plot.setBackgroundPaint(Color.WHITE);

		// set the range axis to display integers only...
		final NumberAxis rangeAxis = (NumberAxis) plot.getRangeAxis();
		rangeAxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());
		rangeAxis.setUpperMargin(0.40);

		// disable bar outlines...
		final CategoryItemRenderer renderer = plot.getRenderer();
		renderer.setSeriesItemLabelsVisible(0, Boolean.TRUE);

		final CategoryAxis domainAxis = plot.getDomainAxis();
		// x축 문자열 회전(STANDARD, UP_45, UP_90,DOWN_45,DOWN_90)
		domainAxis.setCategoryLabelPositions(CategoryLabelPositions.STANDARD); 
		domainAxis.setLowerMargin(0.01d);
		domainAxis.setUpperMargin(0.01d);
		domainAxis.setCategoryMargin(0.30);

		return chart;
	}
}

<%@ page language="java" contentType="image/png; charset=UTF-8"	pageEncoding="UTF-8" %>
<%@ page import="org.jfree.chart.*" %>
<%@ page import="util.chart.*"%>
<%@ page import="java.util.*"%>
<%@ page import="org.jfree.data.category.*"%>
<%@ page import="org.jfree.ui.RefineryUtilities"%>
<%@ page import="org.jfree.chart.plot.PlotOrientation"%>


<%
	ServletOutputStream sos = response.getOutputStream();
	BarChartBean bcb = new BarChartBean();
	JFreeChart chart = bcb.getBarChart();
	ChartUtilities.writeChartAsPNG(sos, chart, 700, 250);
	

/*
	심각: Servlet.service() for servlet jsp threw exception
	java.lang.IllegalStateException: getOutputStream() has already been called for this response
	# Exception
	jsp에서 outputStream을 사용할때 servlet에서 생성된 writer 객체와 중복이 되어서 발생하는 에러.
	이때 servlet에서 생성된 writer 객체를 clear 시키고 jsp에서 다시 생성해서 사용하면 되는것.
	
*/
	out.clear();
	out = pageContext.pushBody();	

%>