java代码绘制柱形图 java怎么实现柱形图
eclipse中用JAVA代码怎么画柱形图表
用jfreechart
创新互联公司成立于2013年,先为昭通等服务建站,昭通等地企业,进行企业商务咨询服务。为昭通企业网站制作PC+手机+微官网三网同步一站式服务解决您的所有建站问题。
jfreechart绘制柱状图
import java.io.File;
import java.io.IOException;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartUtilities;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.data.category.DefaultCategoryDataset;
/*
* 绘制柱状图
*你亮哥
* */
public class BarChart3DDemo
{
public static void main(String[] args)
{
try
{
//设置主题
ChartFactory.setChartTheme(Theme.getTheme());
//构造数据
DefaultCategoryDataset dataset = new DefaultCategoryDataset();
dataset.addValue(100, "JAVA","1");
dataset.addValue(200, "js","1");
dataset.addValue(200, "C++", "2");
dataset.addValue(300, "C", "3");
dataset.addValue(400, "HTML", "4");
dataset.addValue(400, "CSS", "5");
/*
* public static JFreeChart createBarChart3D(
* java.lang.String title, 设置图表的标题
* java.lang.String categoryAxisLabel, 设置分类轴的标示
* java.lang.String valueAxisLabel, 设置值轴的标示
* CategoryDataset dataset, 设置数据
* PlotOrientation orientation, 设置图表的方向
* boolean legend, 设置是否显示图例
* boolean tooltips,设置是否生成热点工具
* boolean urls) 设置是否显示url
*/
JFreeChart chart = ChartFactory.createBarChart3D("编程语言统计", "语言",
"学习人数", dataset, PlotOrientation.VERTICAL, true, false,
false);
//保存图表
ChartUtilities.saveChartAsPNG(new File("E:/chart/BarChart3D.png"), chart, 800, 500);
System.out.println("绘图完成");
}
catch (IOException e)
{
e.printStackTrace();
}
}
}
===================================================================================
//一条线 有点 有数
package Test;
import java.awt.Color;
import java.awt.Font;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartFrame;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.AxisSpace;
import org.jfree.chart.labels.ItemLabelAnchor;
import org.jfree.chart.labels.ItemLabelPosition;
import org.jfree.chart.labels.StandardXYItemLabelGenerator;
import org.jfree.chart.plot.XYPlot;
import org.jfree.chart.renderer.xy.XYItemRenderer;
import org.jfree.chart.renderer.xy.XYLineAndShapeRenderer;
import org.jfree.chart.title.TextTitle;
import org.jfree.data.time.Month;
import org.jfree.data.time.TimeSeries;
import org.jfree.data.time.TimeSeriesCollection;
import org.jfree.ui.RectangleInsets;
import org.jfree.ui.TextAnchor;
public class try123 {
public static void main(String[] args){
//首先构造数据
TimeSeries timeSeries = new TimeSeries("BMI", Month.class);
// 时间曲线数据集合
TimeSeriesCollection lineDataset = new TimeSeriesCollection();
// 构造数据集合
timeSeries.add(new Month(1, 2009), 45);
timeSeries.add(new Month(2, 2009), 46);
timeSeries.add(new Month(3, 2009), 1);
timeSeries.add(new Month(4, 2009), 500);
timeSeries.add(new Month(5, 2009), 43);
timeSeries.add(new Month(6, 2009), 324);
timeSeries.add(new Month(7, 2009), 632);
timeSeries.add(new Month(8, 2009), 34);
timeSeries.add(new Month(9, 2009), 12);
timeSeries.add(new Month(10, 2009), 543);
timeSeries.add(new Month(11, 2009), 32);
timeSeries.add(new Month(12, 2009), 225);
lineDataset.addSeries(timeSeries);
JFreeChart chart = ChartFactory.createTimeSeriesChart("", "date", "bmi", lineDataset, true, true, true);
//增加标题
chart.setTitle(new TextTitle("XXXBMI指数", new Font("隶书", Font.ITALIC, 15)));
chart.setAntiAlias(true);
XYPlot plot = (XYPlot) chart.getPlot();
plot.setAxisOffset(new RectangleInsets(10,10,10,10));//图片区与坐标轴的距离
plot.setOutlinePaint(Color.PINK);
plot.setInsets(new RectangleInsets(15,15,15,15));//坐标轴与最外延的距离
// plot.setOrientation(PlotOrientation.HORIZONTAL);//图形的方向,包括坐标轴。
AxisSpace as = new AxisSpace();
as.setLeft(25);
as.setRight(25);
plot.setFixedRangeAxisSpace(as);
chart.setPadding(new RectangleInsets(5,5,5,5));
chart.setNotify(true);
// 设置曲线是否显示数据点
XYLineAndShapeRenderer xylineandshaperenderer = (XYLineAndShapeRenderer)plot.getRenderer();
xylineandshaperenderer.setBaseShapesVisible(true);
// 设置曲线显示各数据点的值
XYItemRenderer xyitem = plot.getRenderer();
xyitem.setBaseItemLabelsVisible(true);
xyitem.setBasePositiveItemLabelPosition(new ItemLabelPosition(ItemLabelAnchor.INSIDE10, TextAnchor.BASELINE_LEFT));
xyitem.setBaseItemLabelGenerator(new StandardXYItemLabelGenerator());
xyitem.setBaseItemLabelFont(new Font("Dialog", 1, 14));
plot.setRenderer(xyitem);
//显示
ChartFrame frame = new ChartFrame("try1", chart);
frame.pack();
frame.setVisible(true);
}
}
怎样用JAVA来实现在网页中制作柱状图
JFreeChart是JAVA平台上的一个开放的图表绘制类库。它完全使用JAVA语言编写,是为applications, applets, servlets 以及JSP等使用所设计。JFreeChart可生成饼图(pie charts)、柱状图(bar charts)、散点图(scatter plots)、时序图(time series)、甘特图(Gantt charts)等等多种图表,并且可以产生PNG和JPEG格式的输出,还可以与PDF和EXCEL关联。
JFreeChart的主页地址为:
在这里可以找到最新版本的JFreeChart的相关信息,如说明文档、下载连接以及示例图表等。
JFreeChart目前是最好的java图形解决方案,基本能够解决目前的图形方面的需求。
IBM文档:
Javaeye社区:
怎么用java做柱形图!!!
首先要有jfreechart.jar和jcommon-1.0.12.jar两个包然后在web.xml配置
servlet
servlet-nameDisplayChart/servlet-name
servlet-classorg.jfree.chart.servlet.DisplayChart/servlet-class
/servlet
servlet-mapping
servlet-nameDisplayChart/servlet-name
url-pattern/DisplayChart/url-pattern
/servlet-mapping
最后是jsp代码:
%@ page contentType="text/html;charset=GBK"%
%@ page import="org.jfree.chart.ChartFactory,
org.jfree.chart.JFreeChart,
org.jfree.chart.plot.PlotOrientation,
org.jfree.chart.servlet.ServletUtilities,
org.jfree.data.category.CategoryDataset,
org.jfree.data.general.DatasetUtilities"%
%
double[][] data = new double[][] {{1310}, {720}, {1130}, {440}};
String[] rowKeys = {"猪肉", "牛肉","鸡肉", "鱼肉"};
String[] columnKeys = {""};
CategoryDataset dataset = DatasetUtilities.createCategoryDataset(rowKeys, columnKeys, data);
JFreeChart chart = ChartFactory.createBarChart3D("广州肉类销量统计图", "肉类",
"销量",
dataset,
PlotOrientation.VERTICAL,
true,
false,
false);
String filename = ServletUtilities.saveChartAsPNG(chart, 500, 300, null, session);
String graphURL = request.getContextPath() + "/DisplayChart?filename=" + filename;
%
img src="%= graphURL %"width=500 height=300 border=0 usemap="#%= filename %"
网页名称:java代码绘制柱形图 java怎么实现柱形图
网站路径:http://myzitong.com/article/doepoos.html