基于jfreechart生成曲线、柱状等图片并展示到JSP

 更新时间:2020-10-17 14:46:20   作者:佚名   我要评论(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,

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!

果博东方这些翻阅资料,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="/page/2.html" 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 {

	}
}

果博东方以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持脚本之家。

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