JFreeChart开发web报表
一般的柱状图
三维的柱状图
竖的柱状图
多行的柱状图
前期准备工作，以及页面调用可以参考JFreeChart开发--饼状 图(1)
这里只有参考图和后台代码
对应代码
一般的柱状图
package chart;import java.awt.Color;
import java.awt.Font;
import java.io.IOException;
import java.io.PrintWriter;import javax.servlet.http.HttpSession;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartRenderingInfo;
import org.jfree.chart.ChartUtilities;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.CategoryAxis;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.entity.StandardEntityCollection;
import org.jfree.chart.plot.CategoryPlot;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.renderer.category.BarRenderer;
import org.jfree.chart.servlet.ServletUtilities;
import org.jfree.chart.title.TextTitle;
import org.jfree.data.category.CategoryDataset;
import org.jfree.data.category.DefaultCategoryDataset;
public class Barchart2D {
private static CategoryDataset createDataset() {
String s = "生源省份";//这个就是用于说明图形颜色表的的是什么意思String s1 = "北京";
String s2 = "天津";
String s3 = "河北";
String s4 = "安徽";
String s5 = "辽宁";
String s6 = "河南";
String s7 = "山东";DefaultCategoryDataset defaultCategoryDataset = new DefaultCategoryDataset();
defaultCategoryDataset.addValue(2000, s, s1);
defaultCategoryDataset.addValue(600, s, s2);
defaultCategoryDataset.addValue(1200, s, s3);
defaultCategoryDataset.addValue(579, s, s4);
defaultCategoryDataset.addValue(347, s, s5);
defaultCategoryDataset.addValue(468, s, s6);
defaultCategoryDataset.addValue(2000, s, s7);return defaultCategoryDataset;
}private static JFreeChart createChart(CategoryDataset categorydataset) {
String name = "学校生源统计柱状图";
String x_name = "省份";
String y_name = "数量";
System.out.println("name=" + name);
System.out.println("x_name=" + x_name);
JFreeChart jfreechart = ChartFactory.createBarChart(name, x_name,
y_name, categorydataset, PlotOrientation.VERTICAL, true, true,
false);jfreechart.setBackgroundPaint(Color.white);//Color 是paint类型的对象
CategoryPlot categoryplot = jfreechart.getCategoryPlot();
NumberAxis numberaxis = (NumberAxis) categoryplot.getRangeAxis();
CategoryAxis domainAxis = categoryplot.getDomainAxis();//定义字体格式
Font font = new Font("微软雅黑", Font.CENTER_BASELINE, 12);
TextTitle title = new TextTitle("Liguokun 李国坤2D图");
//设置标题的格式
title.setFont(font);
//把标题设置到图片里面
jfreechart.setTitle(title);
domainAxis.setTickLabelFont(new Font("sans-serif", Font.PLAIN, 11));
domainAxis.setLabelFont(new Font("宋体", Font.PLAIN, 12));
numberaxis.setTickLabelFont(new Font("sans-serif", Font.PLAIN, 12));
numberaxis.setLabelFont(new Font("黑体", Font.PLAIN, 12));
jfreechart.getLegend().setItemFont(new Font("宋体", Font.PLAIN, 12));
categoryplot.setDomainGridlinePaint(Color.white);
categoryplot.setDomainGridlinesVisible(true);
categoryplot.setDomainGridlinePaint(Color.blue);//下面用来让柱图更加好看
BarRenderer barrenderer = (BarRenderer) categoryplot.getRenderer();
barrenderer.setDrawBarOutline(true);
barrenderer.setOutlinePaint(Color.black);//加了个黑边，
barrenderer.setMaximumBarWidth(0.05);
barrenderer.setSeriesFillPaint(0, Color.blue);return jfreechart;
}
public static String generateBarChart(HttpSession session, PrintWriter pw) {
String filename = "";CategoryDataset categorydataset = createDataset();//在类里可以调用私有的成员啊
JFreeChart jfreechart = createChart(categorydataset);ChartRenderingInfo info = new ChartRenderingInfo(
new StandardEntityCollection());try {
filename = ServletUtilities.saveChartAsPNG(jfreechart, 500, 300,
info, session);
} catch (IOException e) {
e.printStackTrace();
}<
补充：软件开发 , Java ,
