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<%@ page language="java" contentType="text/html; charset=GBK"
pageEncoding="GBK"%>
<%@ page
import="org.jfree.data.general.DefaultPieDataset,org.jfree.chart.ChartFactory,org.jfree.chart.JFreeChart,org.jfree.chart.servlet.*"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=GBK">
<title>Insert title here</title>
</head>
<body>
<%
DefaultPieDataset dpd = new DefaultPieDataset();
dpd.setValue("管理人员", 25);
dpd.setValue("市场人员", 25);
dpd.setValue("开发人员", 45);
dpd.setValue("其他人员", 10);
JFreeChart chart = ChartFactory.createPieChart3D("某公司组织结构图", dpd,
true, false, false);
String fileName = ServletUtilities.saveChartAsPNG(chart, 800, 600,
session);
String url = request.getContextPath() + "/DisplayChart?filename="
+ fileName;
%>
<img src="<%=url%>" width="800" height="600">
</body>
</html>
import java.awt.Color;
import java.awt.Font;
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.StandardLegend;
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.LineAndShapeRenderer;
import org.jfree.chart.servlet.ServletUtilities;
import org.jfree.data.DefaultCategoryDataset;
public class LineChart {
private DefaultCategoryDataset dataset = new DefaultCategoryDataset();
public void setValue(int sum, String line, String wfield) {
dataset.addValue(sum, line, wfield);
}
public String generateLineChart(String title, String wfield, String hfield,
HttpSession session, PrintWriter pw, int wPhoto, int hPhoto) {
String filename = null;
try {
final JFreeChart chart = ChartFactory.createLineChart(title, // 图表标题
wfield, // 横轴的显示标签
hfield, // 纵轴的显示标签
dataset, // 数据集. 就是CategoryDataset类的实例对象
PlotOrientation.VERTICAL, // 图表方向:水平、垂直 || 显示方式
true, // 是否显示图例(标题)
true, // 是否生成提示工具 tooltips || 是否启动热键
false // 是否生成URL链接
);
StandardLegend legend = (StandardLegend) chart.getLegend();// 生成图例
legend.setDisplaySeriesShapes(true);// 显示图例形状
legend.setShapeScaleX(1.5);// 设置图例X轴的大小
legend.setShapeScaleY(1.5);// 设置图例Y轴的大小
legend.setDisplaySeriesLines(true);// 显示图示项的横线
// 设置图片的背景色
chart.setBackgroundPaint(new java.awt.Color(189, 235, 255));
CategoryPlot plot = (CategoryPlot) chart.getPlot();
plot.setBackgroundPaint(new Color(239, 251, 255));// 生成图片中墙体的背景色
plot.setRangeGridlinePaint(Color.black);// 生成图片中格子线的颜色
// 没有数据时显示的消息
plot.setNoDataMessage("没有相关统计数据");
plot.setNoDataMessageFont(new Font("黑体", Font.CENTER_BASELINE, 16));
plot.setNoDataMessagePaint(Color.RED);
NumberAxis rangeAxis = (NumberAxis) plot.getRangeAxis();
rangeAxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());// 设置图中的刻度线的单位
rangeAxis.setAutoRangeIncludesZero(true);// 强制在自动选择的数据范围中包含0
LineAndShapeRenderer renderer = (LineAndShapeRenderer) plot
.getRenderer();
renderer.setDrawShapes(true);// 折线的数据点根据分类使用不同的形状
renderer.setItemLabelsVisible(true);// 显示每个点上的数据值的提示工具,数据标签是否可见
/*
* 输出到本地图片
*/
/*
FileOutputStream fos_jpg=null;
try{
fos_jpg=new FileOutputStream("E:\\line.jpg");
ChartUtilities.writeChartAsJPEG(fos_jpg,100,chart,400,300,null);
}finally{
try{
fos_jpg.close();
}catch(Exception e){}
}
*/
/*
* 返回到客户端
*/
ChartRenderingInfo info = new ChartRenderingInfo(
new StandardEntityCollection());
// 500是图片长度,300是图片高度
filename = ServletUtilities.saveChartAsPNG(chart, wPhoto, hPhoto,
info, session);
ChartUtilities.writeImageMap(pw, filename, info);
pw.flush();
} catch (Exception e) {
e.printStackTrace();
}
return filename;
}
}
<body>
<%
Zxt zxt = new Zxt();
List list = (ArrayList)request.getAttribute("arr");
for(int i = 0; i< list.size(); i++){
StuBean sb = (StuBean)list.get(i);
zxt.setValue(sb.getS_money(),"个人消费比例图",sb.getS_month()+"");
}
String filename=zxt.generateLineChart("个人消费比例图", "月 份",
"费 用", session, new PrintWriter(out), 800, 550);
String graphURL = request.getContextPath()
+ "/DisplayChart?filename=" + filename;
System.out.println("graphURL:"+graphURL);
%>
<p>
<img src="<%=graphURL %>" usemap="#<%=filename %>">
</p>
</body>