使用 jfreechart 生成 曲线、柱状图、饼状图、分布图 展示到JSP-2
2014-7-9 10596 0
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%>"> <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 {
}
}
