基于jfreechart生成曲线、柱状等图片并展示到JSP
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2022-06-22 09:34:12
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！...
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 {
}
}
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。