这是一个Web Project
首先是web.xml
xmlns:xsi="/2001/XMLSchema-instance"
xsi:schemaLocation="/xml/ns/javaee
/xml/ns/javaee/web-app_2_5.xsd">
DisplayChart
org.jfree.chart.servlet.DisplayChart
ImageServlet
com.jadyer.servlet.ImageServlet
DisplayChart
/servlet/DisplayChart
ImageServlet
/servlet/imageServlet
index.jsp
下面是用于选择生成图片类型的index.jsp
查看统计报表
普通样式
3D样式
下面是用于显示所生成的折线图的result.jsp
返回
最后是用于生成折线图的ImageServlet.java
package com.jadyer.servlet;
import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Font;
import java.io.IOException;
import java.util.Random;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.plot.CategoryPlot;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.renderer.category.LineAndShapeRenderer;
import org.jfree.chart.servlet.ServletUtilities;
import org.jfree.data.category.CategoryDataset;
import org.jfree.data.category.DefaultCategoryDataset;
/**
* 使用JFreeChart绘制2D和3D折线图
* @create Jun 25, 9:58:11 PM
* @author 玄玉
*/
public class ImageServlet extends HttpServlet {
private static final long serialVersionUID = -2942367547538171657L;
public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
//显示样式(是否为3D效果)
String style = request.getParameter("style");
//生成的折线图的文件名
String imageName = null;
if(null!=style && "3D".equals(style)){
//ChartUtilities.writeChartAsJPEG()是面向Java Application的
//ServletUtilities.saveChartAsPNG()是面向Web开发的
imageName = ServletUtilities.saveChartAsJPEG(createChart(true), 500, 300, request.getSession());
}else{
//saveChartAsPNG()的返回值是生成的图片的名字,它所生成的图片会保存在服务器的临时目录下
//Tomcat6的临时目录是D:/Develop/apache-tomcat-6.0.36/temp/目录
imageName = ServletUtilities.saveChartAsJPEG(createChart(false), 500, 300, request.getSession());
}
//获取图片的路径(此时JFreechart会根据filename到服务器的临时目录中寻找图片)
String imageURL = request.getContextPath() + "/servlet/DisplayChart?filename=" + imageName;
request.setAttribute("imageURL", imageURL);
request.getRequestDispatcher("/result.jsp").forward(request, response);
}
/**
* 创建数据集
*/
private CategoryDataset createDataSet() {
//图例名称
String[] line = {"kaspersky", "Nod32", "360"};
//类别
String[] category = {"", "", "", "", ""};
DefaultCategoryDataset dataSet = new DefaultCategoryDataset();
//向数据集中添加数据
for(int i=0; i
for(int j=0; j
dataSet.addValue(100000 + new Random().nextInt(100000), line[i], category[j]);
}
}
return dataSet;
}
/**
* 生成制图对象
* @param is3D 是否为3D效果
*/
private JFreeChart createChart(boolean is3D){
JFreeChart chart = null;
if(is3D){
//图表标题,X轴标题,Y轴标题,绘图数据集,绘制方向,显示图例,采用标准生成器,生成链接
chart = ChartFactory.createLineChart3D("-优秀杀毒软件杀毒数量统计", "杀毒软件", "查杀病毒数量",
this.createDataSet(), PlotOrientation.VERTICAL, true, true, false);
}else{
chart = ChartFactory.createLineChart("-优秀杀毒软件杀毒数量统计", "杀毒软件", "查杀病毒数量",
this.createDataSet(), PlotOrientation.VERTICAL, true, true, false);
}
chart.getTitle().setFont(new Font("隶书", Font.BOLD, 23)); //设置标题字体
chart.getLegend().setItemFont(new Font("宋体", Font.BOLD, 15)); //设置图例类别字体
chart.setBackgroundPaint(new Color(192, 228, 106)); //设置背景色
CategoryPlot plot = chart.getCategoryPlot(); //获取绘图区对象
plot.getDomainAxis().setLabelFont(new Font("宋体", Font.BOLD, 15)); //设置横轴字体
plot.getDomainAxis().setTickLabelFont(new Font("宋体", Font.BOLD, 15)); //设置坐标轴标尺值字体
plot.getRangeAxis().setLabelFont(new Font("宋体", Font.BOLD, 15)); //设置纵轴字体
plot.setBackgroundPaint(Color.WHITE); //设置绘图区背景色
plot.setRangeGridlinePaint(Color.RED); //设置水平方向背景线颜色
plot.setRangeGridlinesVisible(true); //设置是否显示水平方向背景线,默认值为true
plot.setDomainGridlinePaint(Color.RED); //设置垂直方向背景线颜色
plot.setDomainGridlinesVisible(true); //设置是否显示垂直方向背景线,默认值为false
LineAndShapeRenderer renderer = (LineAndShapeRenderer)plot.getRenderer(); //获取折线对象
BasicStroke realLine = new BasicStroke(1.6f); //设置实线
float dashes[] = {8.0f}; //定义虚线数组
//线条粗细,端点风格,折点风格,折点处理办法,虚线数组,虚线偏移量
BasicStroke brokenLine = new BasicStroke(1.6f, BasicStroke.CAP_SQUARE, BasicStroke.JOIN_MITER, 8.0f, dashes, 0.0f);
renderer.setSeriesStroke(1, brokenLine); //利用虚线绘制
renderer.setSeriesStroke(2, brokenLine); //利用虚线绘制
renderer.setSeriesStroke(3, realLine); //利用实线绘制
return chart;
}
}
