Struts2整合JFreeChar

1，导入struts2开发的jar包和struts2-jfreechart-plugin-2.3.16.3.jar

2，web.xml配置

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
  <display-name>Struts2JFreeChart</display-name>
  <welcome-file-list>
    <welcome-file>index.html</welcome-file>
    <welcome-file>index.htm</welcome-file>
    <welcome-file>index.jsp</welcome-file>
    <welcome-file>default.html</welcome-file>
    <welcome-file>default.htm</welcome-file>
    <welcome-file>default.jsp</welcome-file>
  </welcome-file-list>
  
  <filter>
       <filter-name>StrutsPrepareAndExecuteFilter</filter-name>
    <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
  </filter>
  
  <filter-mapping>
          <filter-name>StrutsPrepareAndExecuteFilter</filter-name>
          <url-pattern>/*</url-pattern>
  </filter-mapping>
  
</web-app>

3，edu.hhxy.chart.bar.BarCharAction.java(Action)

package edu.hhxy.chart.bar;

import java.awt.Color;

import org.jfree.chart.ChartFactory;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.labels.ItemLabelAnchor;
import org.jfree.chart.labels.ItemLabelPosition;
import org.jfree.chart.labels.StandardCategoryItemLabelGenerator;
import org.jfree.chart.plot.CategoryPlot;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.renderer.category.BarRenderer3D;
import org.jfree.data.category.CategoryDataset;
import org.jfree.data.general.DatasetUtilities;
import org.jfree.ui.TextAnchor;

import com.opensymphony.xwork2.ActionSupport;

public class BarCharAction extends ActionSupport {

    /**
     * 
     */
    private static final long serialVersionUID = 1L;

    private JFreeChart chart;

    public JFreeChart getChart() {
        return chart;
    }

    @Override
    public String execute() throws Exception {
        double[][] data = new double[][] { { 1320, 1110, 1123, 321 },
                { 720, 210, 1423, 1321 }, { 830, 1310, 123, 521 },
                { 400, 1110, 623, 321 } };
        String[] rowKeys = { "苹果", "香蕉", "橘子", "梨子" };
        String[] columnKeys = { "深圳", "北京", "上海", "南京" };
        CategoryDataset dataset = DatasetUtilities.createCategoryDataset(
                rowKeys, columnKeys, data);
        chart = ChartFactory.createBarChart3D("水果销售统计图", "水果", "销售", dataset,
                PlotOrientation.VERTICAL, true, true, true);

        CategoryPlot plot = chart.getCategoryPlot();
        // 设置网格背景颜色
        plot.setBackgroundPaint(Color.white);
        // 设置网格竖线颜色
        plot.setDomainGridlinePaint(Color.pink);
        // 设置网格横线颜色
        plot.setRangeGridlinePaint(Color.pink);

        // 显示每个柱的数值，并修改该数值的字体属性
        BarRenderer3D renderer = new BarRenderer3D();
        renderer.setBaseItemLabelGenerator(new StandardCategoryItemLabelGenerator());
        renderer.setBaseItemLabelsVisible(true);

        renderer.setBasePositiveItemLabelPosition(new ItemLabelPosition(
                ItemLabelAnchor.OUTSIDE12, TextAnchor.BASELINE_LEFT));
        renderer.setItemLabelAnchorOffset(10D);

        // 设置平行柱的之间距离
        renderer.setItemMargin(0.4);

        plot.setRenderer(renderer);
        return SUCCESS;
    }
}

4，struts.xml中配置Action

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
    "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
    "http://struts.apache.org/dtds/struts-2.3.dtd">

<struts>
    
    <package name="jfreechart" extends="jfreechart-default">
        <action name="barChart" class="edu.hhxy.chart.bar.BarCharAction">
            <result name="success" type="chart">
               <param name="value">chart</param>
               <param name="type">png</param>
               <param name="width">700</param>
               <param name="height">500</param>
             </result>
        </action>
    </package>
    
</struts>

5，index.jsp

<%@ page language="java" contentType="text/html; charset=utf-8"
    pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Insert title here</title>
</head>
<body>
    <img src="barChart" />
</body>
</html>

Result: