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java 从零开始，学习笔记之基础入门<统计图>（四十四)

2014-02-25 11:41 831 查看

统计图（JFreeChart）
JSP内嵌代码单独实现

（在web.xml配置如下代码）

<servlet>
<servlet-name>DisplayChart</servlet-name>
<servlet-class>org.jfree.chart.servlet.DisplayChart</servlet-class>
</servlet>

<servlet-mapping>
<servlet-name>DisplayChart</servlet-name>
<url-pattern>/servlet/DisplayChart</url-pattern>
</servlet-mapping>

Index.jsp

<%@
page language="java"import="java.util.*"pageEncoding="utf-8"%>
<%@pageimport="org.jfree.data.category.*"%>
<%@pageimport="org.jfree.chart.JFreeChart"%>
<%@pageimport="org.jfree.chart.ChartFactory"%>
<%@pageimport="org.jfree.chart.plot.PlotOrientation"%>
<%@pageimport="org.jfree.chart.servlet.ServletUtilities"%>
<%@pageimport="org.jfree.chart.title.TextTitle"%>
<%@pageimport="java.awt.Font"%>
<%@pageimport="org.jfree.chart.axis.CategoryAxis"%>
<%@pageimport="org.jfree.chart.plot.CategoryPlot"%>
<%@pageimport="org.jfree.chart.axis.ValueAxis"%>
<%
    // request.setCharacterEncoding("utf-8");
// response.setCharacterEncoding("utf-8");
//
// //数据结果集
// DefaultCategoryDataset dataset = new DefaultCategoryDataset();
// dataset.addValue(200,"广州","苹果");
// dataset.addValue(100,"广州","梨子");
//
// //创建JFreeChart
// JFreeChart chart = ChartFactory.createBarChart("水果销售统计图","水果","销售",dataset,PlotOrientation.VERTICAL,false,false,false);
//
// //生成一张图片，以供页面中的img标签使用
// String pngName=ServletUtilities.saveChartAsPNG(chart,500,300,null,session);
// System.out.println("图片名称"+pngName);
// String grapgURL=request.getContextPath()+"/servlet/DisplayChart?filename="+pngName;


    //第二种写法
       //注意在web.xml文件中进行配置
       DefaultCategoryDataset dataset = new DefaultCategoryDataset();
       dataset.addValue(300, "广州","苹果");
       dataset.addValue(200, "广州","梨子");
       dataset.addValue(500, "广州","葡萄");
       dataset.addValue(340, "广州","芒果");
       dataset.addValue(280, "广州","荔枝");

       JFreeChart chart = ChartFactory.createBarChart3D("水果销量统计图",
                         "水果",//x轴名称
                         "销量",//y轴名称
                         dataset, //
绘图数据集
                         PlotOrientation.VERTICAL,
// 柱形图绘制方向
                         false,//
显示图例
                         false,//
显示图例名称
                         false);//
生成链接

       TextTitle textTitle=chart.getTitle();
       textTitle.setFont(new Font("黑体",Font.PLAIN,20));

       //对图像区域的字体进行设置
       CategoryPlot plot=chart.getCategoryPlot();
       //横向图像与对象
       CategoryAxis domainAxis=plot.getDomainAxis();
       domainAxis.setVisible(true);
       //plot.setDomainAxes(domainAxis);
       //横向坐标
       domainAxis.setTickLabelFont(new Font("黑体",Font.PLAIN,15));    //横向标题
       domainAxis.setLabelFont(new Font("黑体",Font.PLAIN,20));
       //纵向图像域对象
       ValueAxis rAxis=plot.getRangeAxis();
       //纵向坐标
       rAxis.setTickLabelFont(new Font("黑体",Font.PLAIN,20));
       //纵向标题
       rAxis.setLabelFont(new Font("黑体",Font.PLAIN,15));
       String filename =ServletUtilities.saveChartAsJPEG(chart, 500, 300,null, session);
        //String filename = ServletUtilities.saveChartAsPNG(chart, 500, 300, null, session);
       String graphURL = request.getContextPath() +
"/servlet/DisplayChart?filename=" + filename;

%>

<!DOCTYPEHTML
PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>

    <title>My JSP 'index.jsp' starting page</title>
    <metahttp-equiv="pragma"content="no-cache">
    <metahttp-equiv="cache-control"content="no-cache">
    <metahttp-equiv="expires"content="0">
    <metahttp-equiv="keywords"content="keyword1,keyword2,keyword3">
    <metahttp-equiv="description"content="This
is my page">
    
</head>

<body>
    This is my JSP page. <br>
    <imgsrc="<%=graphURL%>"/>
</body>
</html>

Servlet实现：

Servlet中的代码

ChartAction.java

package com.ibm.action;

import java.awt.Font;
import java.io.IOException;
import java.io.PrintWriter;

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.ValueAxis;
import org.jfree.chart.plot.CategoryPlot;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.title.TextTitle;
import org.jfree.data.category.DefaultCategoryDataset;
import org.jfree.data.general.DefaultPieDataset;

public
class ChartAction extends HttpServlet {

    public
void doGet(HttpServletRequest request, HttpServletResponse response)
           throws ServletException, IOException {

       response.setContentType("text/html");
       PrintWriter out = response.getWriter();
       out
              .println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");
       out.println("<HTML>");
       out.println(" <HEAD><TITLE>A Servlet</TITLE></HEAD>");
       out.println(" <BODY>");
       out.print("    This is ");
       out.print(this.getClass());
       out.println(", using the GET method");
       out.println(" </BODY>");
       out.println("</HTML>");
       out.flush();
       out.close();
    }

    public
void doPost(HttpServletRequest request, HttpServletResponse response)
           throws ServletException, IOException {

       response.setContentType("text/html");
       PrintWriter out = response.getWriter();
       out
              .println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");
       out.println("<HTML>");
       out.println(" <HEAD><TITLE>A Servlet</TITLE></HEAD>");
       out.println(" <BODY>");
       out.print("   This is ");
       out.print(this.getClass());
       out.println(", using the POST method");
       out.println(" </BODY>");
       out.println("</HTML>");
       out.flush();
       out.close();
    }

    @Override
    protected
void service(HttpServletRequest request, HttpServletResponse response)
           throws ServletException, IOException {
           response.setContentType("image/jpeg");
           //指定数据结果集对象
           DefaultCategoryDataset dataset = getDataSet();

           //利用ChartFactory创建一个图标对象并指定默认格式
           JFreeChart chart = ChartFactory.createBarChart3D("水果销量统计图",
                      "水果",//x轴名称
                      "销量",//y轴名称
                      dataset, //
绘图数据集
                      PlotOrientation.VERTICAL,//
柱形图绘制方向
                      false,//
显示图例
                      false,//
显示图例名称
                      false);//
生成链接

           TextTitle textTitle=chart.getTitle();
           textTitle.setFont(new Font("黑体",Font.PLAIN,20));

           //对图像区域的字体进行设置
           CategoryPlot plot=chart.getCategoryPlot();
           //横向图像与对象
           CategoryAxis domainAxis=plot.getDomainAxis();
           domainAxis.setVisible(true);
           //plot.setDomainAxes(domainAxis);
           //横向坐标
           domainAxis.setTickLabelFont(new Font("黑体",Font.PLAIN,15));      //横向标题
           domainAxis.setLabelFont(new Font("黑体",Font.PLAIN,20));
           //纵向图像域对象
           ValueAxis rAxis=plot.getRangeAxis();
           //纵向坐标
           rAxis.setTickLabelFont(new Font("黑体",Font.PLAIN,20));
           //纵向标题
           rAxis.setLabelFont(new Font("黑体",Font.PLAIN,15));

           //创建一张图片
           //图片流数据最终将在客户端img标签中被捕获到
           ChartUtilities.writeChartAsJPEG(response.getOutputStream(), 0.99f,
           chart, 600, 450, null);
    }

    /**
    * * 获取一个简单数据集对象 *
    */
    private
static DefaultCategoryDataset getDataSet() {
    DefaultCategoryDataset dataset = new DefaultCategoryDataset();
    dataset.addValue(300, "广州","苹果");
    dataset.addValue(200, "广州","梨子");
    dataset.addValue(500, "广州","葡萄");
    dataset.addValue(340, "广州","芒果");
    dataset.addValue(280, "广州","荔枝");
    return dataset;
    }
}

页面部分

<%@
page language="java"import="java.util.*"pageEncoding="utf-8"%>

<!DOCTYPEHTML
PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>

    <title>My JSP 'index.jsp' starting page</title>
    <metahttp-equiv="pragma"content="no-cache">
    <metahttp-equiv="cache-control"content="no-cache">
    <metahttp-equiv="expires"content="0">
    <metahttp-equiv="keywords"content="keyword1,keyword2,keyword3">
    <metahttp-equiv="description"content="This
is my page">
    
</head>

<body>
    This is my JSP page. <br>
    <imgsrc="ChartAction"/>
</body>
</html>

Struts实现：

Web.xml

Web.xml

<?xmlversion="1.0"encoding="UTF-8"?>
<web-appversion="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"> <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
</welcome-file-list>

<servlet>
<servlet-name>DisplayChart</servlet-name>
<servlet-class>org.jfree.chart.servlet.DisplayChart</servlet-class>
</servlet>
<servlet>
    <description>This is the description of my J2EE component</description>
    <display-name>This is the display name of my J2EE component</display-name>
    <servlet-name>ChartAction</servlet-name>
    <servlet-class>com.ibm.action.ChartAction</servlet-class>
</servlet>

<servlet-mapping>
<servlet-name>DisplayChart</servlet-name>
<url-pattern>/servlet/DisplayChart</url-pattern>
</servlet-mapping>
<servlet-mapping>
    <servlet-name>ChartAction</servlet-name>
    <url-pattern>/ChartAction</url-pattern>
</servlet-mapping>

<filter>
<filter-name>filterDispatcher</filter-name>
<filter-class>org.apache.struts2.dispatcher.FilterDispatcher</filter-class>
</filter>

<filter-mapping>
<filter-name>filterDispatcher</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>

</web-app>

Struts.xml

<?xmlversion="1.0"encoding="UTF-8"?>
<!DOCTYPEstruts
PUBLIC
    "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
    "http://struts.apache.org/dtds/struts-2.0.dtd">
<struts>
    <packagename="chartpackage"extends="struts-default">
    
    <result-types>
        <result-typename="chart"class="org.apache.struts2.dispatcher.ChartResult"></result-type>
   </result-types>

    <actionname="chart"class="com.ibm.action.ChartOperAction">
    
        <resultname="success"type="chart">
            <paramname="width">400</param>
            <paramname="height">300</param>
        </result>
    </action>
    </package>
</struts>

ChartOperAction.java

package com.ibm.action;

import java.awt.Font;

import org.jfree.chart.ChartFactory;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.CategoryAxis;
import org.jfree.chart.axis.ValueAxis;
import org.jfree.chart.plot.CategoryPlot;
import org.jfree.chart.plot.PiePlot;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.title.TextTitle;
import org.jfree.data.category.DefaultCategoryDataset;
import org.jfree.data.general.DefaultPieDataset;

public
class ChartOperAction {

    //注意名称
    JFreeChart chart;

    public String execute(){
    //指定数据结果集对象
       DefaultCategoryDataset dataset = getDataSet();

    //利用ChartFactory创建一个图标对象（创建饼状图）
// chart=new JFreeChart("Moderation Function",JFreeChart.DEFAULT_TITLE_FONT,new PiePlot(data),false);


    //利用ChartFactory创建一个图标对象并指定默认格式(创建柱状图)
    chart = ChartFactory.createBarChart3D("水果销量统计图",
                  "水果",//x轴名称
                  "销量",//y轴名称
                  dataset, //
绘图数据集
                  PlotOrientation.VERTICAL,//
柱形图绘制方向
                  false,//
显示图例
                  false,//
显示图例名称
                  false);//
生成链接

    TextTitle textTitle=chart.getTitle();
    textTitle.setFont(new Font("黑体",Font.PLAIN,20));

    //对图像区域的字体进行设置
    CategoryPlot plot=chart.getCategoryPlot();
    //横向图像与对象
    CategoryAxis domainAxis=plot.getDomainAxis();
    domainAxis.setVisible(true);
    //plot.setDomainAxes(domainAxis);
    //横向坐标
    domainAxis.setTickLabelFont(new Font("黑体",Font.PLAIN,15));   //横向标题
    domainAxis.setLabelFont(new Font("黑体",Font.PLAIN,20));
    //纵向图像域对象
    ValueAxis rAxis=plot.getRangeAxis();
    //纵向坐标
    rAxis.setTickLabelFont(new Font("黑体",Font.PLAIN,20));
    //纵向标题
    rAxis.setLabelFont(new Font("黑体",Font.PLAIN,15));

    return
"success";
    }

    /**
    * * 获取一个简单数据集对象 *
    */
    private
static DefaultCategoryDataset getDataSet() {

    //创建柱状图结果集
    DefaultCategoryDataset dataset = new DefaultCategoryDataset();
    dataset.addValue(300, "广州","苹果");
    dataset.addValue(200, "广州","梨子");
    dataset.addValue(500, "广州","葡萄");
    dataset.addValue(340, "广州","芒果");
    dataset.addValue(280, "广州","荔枝");

    //饼状图结果集
// DefaultPieDataset dataset = new DefaultPieDataset();
// dataset.setValue("苹果", 100);
// dataset.setValue("梨子", 200);
// dataset.setValue("葡萄", 300);
// dataset.setValue("香蕉", 400);
// dataset.setValue("荔枝", 500);
    return dataset;
    }

    public JFreeChart getChart() {
       returnchart;
    }

}

页面部分

<%@
page language="java"import="java.util.*"pageEncoding="ISO-8859-1"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

<!DOCTYPEHTML
PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
    <basehref="<%=basePath%>">

    <title>My JSP 'chartoperaction.jsp' starting page</title>

    <metahttp-equiv="pragma"content="no-cache">
    <metahttp-equiv="cache-control"content="no-cache">
    <metahttp-equiv="expires"content="0">
    <metahttp-equiv="keywords"content="keyword1,keyword2,keyword3">
    <metahttp-equiv="description"content="This
is my page">
    

</head>

<body>
    <imgsrc="chart.do"/>
</body>
</html>

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标签： 从零开始学习笔记 java 基础 JFreeChart

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