基于jfreechart生成曲线、柱状等图片并展示到JSP
cuisuqiang 人气:0虽然现在JS做报表和图形展示已经非常普遍和漂亮了，但是不能忽略有jfreechart 这样一种东西！
这些翻阅资料，在看以前写的示例时发现了关于jfreechart 的简单示例，不管怎样发上来分享一下！
这个示例使用JSP和Servlet做后台和前台展示，下面有源代码可以直接运行！
生产线型趋势图：
package com.xidian.servlet;
import java.awt.Color;
import java.awt.Font;
import java.io.*;
import java.text.SimpleDateFormat;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.jfree.chart.*;
import org.jfree.chart.axis.DateAxis;
import org.jfree.chart.axis.ValueAxis;
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.Day;
import org.jfree.data.time.TimeSeries;
import org.jfree.data.time.TimeSeriesCollection;
import org.jfree.data.xy.XYDataset;
/**
* 生产线型趋势图
* @说明
* @author cuisuqiang
* @version 1.0
* @since
*/
@SuppressWarnings("serial")
public class LineServlet extends HttpServlet {
@SuppressWarnings("deprecation")
@Override
protected void service(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
response.setContentType("text/html");
// 在Mysql中使用 select
// year(accessdate),month(accessdate),day(accessdate),count(*)
// 其中accessdate 是一个date类型的时间
// 时间序列对象集合
TimeSeriesCollection chartTime = new TimeSeriesCollection();
// 时间序列对象，第1个参数表示时间序列的名字，第2个参数是时间类型，这里为天
// 该对象用于保存前count天每天的访问次数
TimeSeries timeSeries = new TimeSeries("日访问", Day.class);
// 为了演示，直接拼装数据
// Day的组装格式是day-month-year 访问次数
timeSeries.add(new Day(1, 1, 2010), 50);
timeSeries.add(new Day(2, 1, 2010), 47);
timeSeries.add(new Day(3, 1, 2010), 82);
timeSeries.add(new Day(4, 1, 2010), 95);
timeSeries.add(new Day(5, 1, 2010), 104);
timeSeries.add(new Day(6, 1, 2010), 425);
chartTime.addSeries(timeSeries);
XYDataset date = chartTime;
try {
// 使用ChartFactory来创建时间序列的图表对象
JFreeChart chart = ChartFactory.createTimeSeriesChart(
"网站每天访问统计", // 图形标题
"日期", // X轴说明
"访问量", // Y轴说明
date, // 数据
true, // 是否创建图例
true, // 是否生成Tooltips
false // 是否生产URL链接
);
// 设置整个图片的背景色
chart.setBackgroundPaint(Color.PINK);
// 设置图片有边框
chart.setBorderVisible(true);
// 获得图表区域对象
XYPlot xyPlot = (XYPlot) chart.getPlot();
// 设置报表区域的背景色
xyPlot.setBackgroundPaint(Color.lightGray);
// 设置横 纵坐标网格颜色
xyPlot.setDomainGridlinePaint(Color.GREEN);
xyPlot.setRangeGridlinePaint(Color.GREEN);
// 设置横、纵坐标交叉线是否显示
xyPlot.setDomainCrosshairVisible(true);
xyPlot.setRangeCrosshairVisible(true);
// 获得数据点（X,Y）的render，负责描绘数据点
XYItemRenderer xyItemRenderer = xyPlot.getRenderer();
if (xyItemRenderer instanceof XYLineAndShapeRenderer) {
XYLineAndShapeRenderer xyLineAndShapeRenderer = (XYLineAndShapeRenderer) xyItemRenderer;
xyLineAndShapeRenderer.setShapesVisible(true); // 数据点可见
xyLineAndShapeRenderer.setShapesFilled(true); // 数据点是实心点
xyLineAndShapeRenderer.setSeriesFillPaint(0, Color.RED); // 数据点填充为蓝色
xyLineAndShapeRenderer.setUseFillPaint(true);// 将设置好的属性应用到render上
}
// 配置以下内容方可解决乱码问题
// 配置字体
Font xfont = new Font("宋体", Font.PLAIN, 12); // X轴
Font yfont = new Font("宋体", Font.PLAIN, 12); // Y轴
Font kfont = new Font("宋体", Font.PLAIN, 12); // 底部
Font titleFont = new Font("宋体", Font.BOLD, 25); // 图片标题
// 图片标题
chart.setTitle(new TextTitle(chart.getTitle().getText(), titleFont));
// 底部
chart.getLegend().setItemFont(kfont);
// X 轴
ValueAxis domainAxis = xyPlot.getDomainAxis();
domainAxis.setLabelFont(xfont);// 轴标题
domainAxis.setTickLabelFont(xfont);// 轴数值
domainAxis.setTickLabelPaint(Color.BLUE); // 字体颜色
// Y 轴
ValueAxis rangeAxis = xyPlot.getRangeAxis();
rangeAxis.setLabelFont(yfont);
rangeAxis.setLabelPaint(Color.BLUE); // 字体颜色
rangeAxis.setTickLabelFont(yfont);
// 定义坐标轴上日期显示的格式
DateAxis dateAxis = (DateAxis) xyPlot.getDomainAxis();
// 设置日期格式
dateAxis.setDateFormatOverride(new SimpleDateFormat("yyyy-MM-dd"));
// 向客户端输出生成的图片
ChartUtilities.writeChartAsJPEG(response.getOutputStream(), 1.0f,
chart, 500, 300, null);
} catch (Exception e) {
e.printStackTrace();
}
}
}
生产柱状图：
package com.xidian.servlet;
import java.awt.Color;
import java.awt.Font;
import java.io.IOException;
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.ChartUtilities;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.CategoryAxis;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.plot.CategoryPlot;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.renderer.category.BarRenderer;
import org.jfree.chart.title.TextTitle;
import org.jfree.data.category.DefaultCategoryDataset;
/**
* 生产柱状图
* @说明
* @author cuisuqiang
* @version 1.0
* @since
*/
@SuppressWarnings("serial")
public class PillarServlet extends HttpServlet {
@Override
protected void service(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
response.setContentType("text/html");
// 使用普通数据集
DefaultCategoryDataset chartDate = new DefaultCategoryDataset();
// 增加测试数据，第一个参数是访问量，最后一个是时间，中间是显示用不考虑
chartDate.addValue(55, "访问量", "2010-01");
chartDate.addValue(65, "访问量", "2010-02");
chartDate.addValue(59, "访问量", "2010-03");
chartDate.addValue(156, "访问量", "2010-04");
chartDate.addValue(452, "访问量", "2010-05");
chartDate.addValue(359, "访问量", "2010-06");
try {
// 从数据库中获得数据集
DefaultCategoryDataset data = chartDate;
// 使用ChartFactory创建3D柱状图，不想使用3D，直接使用createBarChart
JFreeChart chart = ChartFactory.createBarChart3D(
"网站月访问量统计", // 图表标题
"时间", // 目录轴的显示标签
"访问量", // 数值轴的显示标签
data, // 数据集
PlotOrientation.VERTICAL, // 图表方向，此处为垂直方向
// PlotOrientation.HORIZONTAL, //图表方向，此处为水平方向
true, // 是否显示图例
true, // 是否生成工具
false // 是否生成URL链接
);
// 设置整个图片的背景色
chart.setBackgroundPaint(Color.PINK);
// 设置图片有边框
chart.setBorderVisible(true);
Font kfont = new Font("宋体", Font.PLAIN, 12); // 底部
Font titleFont = new Font("宋体", Font.BOLD, 25); // 图片标题
// 图片标题
chart.setTitle(new TextTitle(chart.getTitle().getText(), titleFont));
// 底部
chart.getLegend().setItemFont(kfont);
// 得到坐标设置字体解决乱码
CategoryPlot categoryplot = (CategoryPlot) chart.getPlot();
categoryplot.setDomainGridlinesVisible(true);
categoryplot.setRangeCrosshairVisible(true);
categoryplot.setRangeCrosshairPaint(Color.blue);
NumberAxis numberaxis = (NumberAxis) categoryplot.getRangeAxis();
numberaxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());
BarRenderer barrenderer = (BarRenderer) categoryplot.getRenderer();
barrenderer.setBaseItemLabelFont(new Font("宋体", Font.PLAIN, 12));
barrenderer.setSeriesItemLabelFont(1, new Font("宋体", Font.PLAIN, 12));
CategoryAxis domainAxis = categoryplot.getDomainAxis();
/*------设置X轴坐标上的文字-----------*/
domainAxis.setTickLabelFont(new Font("sans-serif", Font.PLAIN, 11));
/*------设置X轴的标题文字------------*/
domainAxis.setLabelFont(new Font("宋体", Font.PLAIN, 12));
/*------设置Y轴坐标上的文字-----------*/
numberaxis.setTickLabelFont(new Font("sans-serif", Font.PLAIN, 12));
/*------设置Y轴的标题文字------------*/
numberaxis.setLabelFont(new Font("宋体", Font.PLAIN, 12));
/*------这句代码解决了底部汉字乱码的问题-----------*/
chart.getLegend().setItemFont(new Font("宋体", Font.PLAIN, 12));
// 生成图片并输出
ChartUtilities.writeChartAsJPEG(response.getOutputStream(), 1.0f,
chart, 500, 300, null);
} catch (Exception e) {
e.printStackTrace();
}
}
}
生成饼状统计图：
package com.xidian.servlet;
import java.awt.Color;
import java.awt.Font;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.jfree.chart.ChartUtilities;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.plot.PiePlot3D;
import org.jfree.chart.title.TextTitle;
import org.jfree.data.general.DefaultPieDataset;
/**
* 生成饼状统计图
* @说明
* @author cuisuqiang
* @version 1.0
* @since
*/
@SuppressWarnings("serial")
public class CakeServlet extends HttpServlet {
protected void service(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
response.setContentType("text/html");
// 默认数据类型
DefaultPieDataset dataType = new DefaultPieDataset();
// 数据参数 内容，数量
dataType.setValue("IE6", 156);
dataType.setValue("IE7", 230);
dataType.setValue("IE8", 45);
dataType.setValue("火狐", 640);
dataType.setValue("谷歌", 245);
try {
DefaultPieDataset data = dataType;
// 生成普通饼状图除掉 3D 即可
// 生产3D饼状图
PiePlot3D plot = new PiePlot3D(data);
JFreeChart chart = new JFreeChart(
"用户使用的浏览器类型", // 图形标题
JFreeChart.DEFAULT_TITLE_FONT, // 标题字体
plot, // 图标标题对象
true // 是否显示图例
);
// 设置整个图片的背景色
chart.setBackgroundPaint(Color.PINK);
// 设置图片有边框
chart.setBorderVisible(true);
// 配置字体
Font kfont = new Font("宋体", Font.PLAIN, 12); // 底部
Font titleFont = new Font("宋体", Font.BOLD, 25); // 图片标题
// 图片标题
chart.setTitle(new TextTitle(chart.getTitle().getText(), titleFont));
// 底部
chart.getLegend().setItemFont(kfont);
ChartUtilities.writeChartAsJPEG(response.getOutputStream(), 1.0f,
chart, 500, 300, null);
} catch (Exception e) {
e.printStackTrace();
}
}
}
柱状分布统计图：
package com.xidian.servlet;
import java.awt.Color;
import java.awt.Font;
import java.io.IOException;
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.ChartUtilities;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.CategoryAxis;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.plot.CategoryPlot;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.renderer.category.BarRenderer;
import org.jfree.chart.title.TextTitle;
import org.jfree.data.category.DefaultCategoryDataset;
/**
* 柱状分布统计图
* @说明
* @author cuisuqiang
* @version 1.0
* @since
*/
@SuppressWarnings("serial")
public class ParagraphsServlet extends HttpServlet {
protected void service(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
response.setContentType("text/html");
DefaultCategoryDataset dataTime = new DefaultCategoryDataset();
// 这是一组数据
dataTime.addValue(52, "0-6", "2010-1-1");
dataTime.addValue(86, "6-12", "2010-1-1");
dataTime.addValue(126, "12-18", "2010-1-1");
dataTime.addValue(42, "18-24", "2010-1-1");
// 这是一组数据
dataTime.addValue(452, "0-6", "2010-1-2");
dataTime.addValue(96, "6-12", "2010-1-2");
dataTime.addValue(254, "12-18", "2010-1-2");
dataTime.addValue(126, "18-24", "2010-1-2");
// 这是一组数据
dataTime.addValue(256, "0-6", "2010-1-3");
dataTime.addValue(86, "6-12", "2010-1-3");
dataTime.addValue(365, "12-18", "2010-1-3");
dataTime.addValue(24, "18-24", "2010-1-3");
try {
DefaultCategoryDataset data = dataTime;
// 使用ChartFactory创建3D柱状图，不想使用3D，直接使用createBarChart
JFreeChart chart = ChartFactory.createBarChart3D(
"网站时间段访问量统计",
"时间",
"访问量",
data,
PlotOrientation.VERTICAL,
true,
false,
false
);
// 设置整个图片的背景色
chart.setBackgroundPaint(Color.PINK);
// 设置图片有边框
chart.setBorderVisible(true);
Font kfont = new Font("宋体", Font.PLAIN, 12); // 底部
Font titleFont = new Font("宋体", Font.BOLD, 25); // 图片标题
// 图片标题
chart.setTitle(new TextTitle(chart.getTitle().getText(), titleFont));
// 底部
chart.getLegend().setItemFont(kfont);
// 得到坐标设置字体解决乱码
CategoryPlot categoryplot = (CategoryPlot) chart.getPlot();
categoryplot.setDomainGridlinesVisible(true);
categoryplot.setRangeCrosshairVisible(true);
categoryplot.setRangeCrosshairPaint(Color.blue);
NumberAxis numberaxis = (NumberAxis) categoryplot.getRangeAxis();
numberaxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());
BarRenderer barrenderer = (BarRenderer) categoryplot.getRenderer();
barrenderer.setBaseItemLabelFont(new Font("宋体", Font.PLAIN, 12));
barrenderer.setSeriesItemLabelFont(1, new Font("宋体", Font.PLAIN, 12));
CategoryAxis domainAxis = categoryplot.getDomainAxis();
/*------设置X轴坐标上的文字-----------*/
domainAxis.setTickLabelFont(new Font("sans-serif", Font.PLAIN, 11));
/*------设置X轴的标题文字------------*/
domainAxis.setLabelFont(new Font("宋体", Font.PLAIN, 12));
/*------设置Y轴坐标上的文字-----------*/
numberaxis.setTickLabelFont(new Font("sans-serif", Font.PLAIN, 12));
/*------设置Y轴的标题文字------------*/
numberaxis.setLabelFont(new Font("宋体", Font.PLAIN, 12));
/*------这句代码解决了底部汉字乱码的问题-----------*/
chart.getLegend().setItemFont(new Font("宋体", Font.PLAIN, 12));
ChartUtilities.writeChartAsJPEG(response.getOutputStream(), 1.0f,
chart, 500, 300, null);
} catch (Exception es) {
es.printStackTrace();
}
}
}
JSP上使用IMG图片来请求Servlet显示图片：
<%@ page language="java" pageEncoding="UTF-8"%> <% String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <base href="<%=basePath%>" rel="external nofollow" > <title></title> <meta http-equiv="pragma" content="no-cache"> <meta http-equiv="cache-control" content="no-cache"> <meta http-equiv="expires" content="0"> <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> <meta http-equiv="description" content="This is my page"> </head> <body> <center> <img src="LineServlet"> <img src="PillarServlet"> <img src="ParagraphsServlet"> <img src="CakeServlet"> </center> </body> </html>
WEB.xml配置：
<?xml version="1.0" encoding="UTF-8"?> <web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"> <filter> <filter-name>EncodingFilter</filter-name> <filter-class>org.filter.EncodingFilter</filter-class> </filter> <filter-mapping> <filter-name>EncodingFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <servlet> <servlet-name>LineServlet</servlet-name> <servlet-class>com.xidian.servlet.LineServlet</servlet-class> </servlet> <servlet> <servlet-name>PillarServlet</servlet-name> <servlet-class>com.xidian.servlet.PillarServlet</servlet-class> </servlet> <servlet> <servlet-name>ParagraphsServlet</servlet-name> <servlet-class> com.xidian.servlet.ParagraphsServlet </servlet-class> </servlet> <servlet> <servlet-name>CakeServlet</servlet-name> <servlet-class>com.xidian.servlet.CakeServlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>LineServlet</servlet-name> <url-pattern>/LineServlet</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>PillarServlet</servlet-name> <url-pattern>/PillarServlet</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>ParagraphsServlet</servlet-name> <url-pattern>/ParagraphsServlet</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>CakeServlet</servlet-name> <url-pattern>/CakeServlet</url-pattern> </servlet-mapping> <welcome-file-list> <welcome-file>index.jsp</welcome-file> </welcome-file-list> </web-app>
为了解决乱码问题，我配置了一个过滤器：
package org.filter;
import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
/**
* 处理乱码
* @说明
* @author cuisuqiang
* @version 1.0
* @since
*/
public class EncodingFilter implements Filter {
public void destroy() {
}
public void doFilter(ServletRequest request, ServletResponse response,
FilterChain chain) throws IOException, ServletException {
request.setCharacterEncoding("gbk");
response.setCharacterEncoding("gbk");
chain.doFilter(request, response);
}
public void init(FilterConfig arg0) throws ServletException {
}
}
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