freeChar 折线图

 

Jfreechar 折线图：

 

package com.gamemag.web.player;

 

import java.awt.Color;

import java.awt.Font;

import java.io.IOException;

import java.io.PrintWriter;

import java.util.List;

 

import javax.servlet.http.HttpSession;

 

import org.jfree.chart.ChartFactory;

import org.jfree.chart.ChartRenderingInfo;

import org.jfree.chart.ChartUtilities;

import org.jfree.chart.JFreeChart;

import org.jfree.chart.axis.CategoryAxis;

import org.jfree.chart.axis.CategoryLabelPositions;

import org.jfree.chart.axis.NumberAxis;

import org.jfree.chart.entity.StandardEntityCollection;

import org.jfree.chart.plot.CategoryPlot;

import org.jfree.chart.plot.PlotOrientation;

import org.jfree.chart.renderer.category.LineAndShapeRenderer;

import org.jfree.chart.servlet.ServletUtilities;

import org.jfree.chart.title.TextTitle;

import org.jfree.data.category.CategoryDataset;

import org.jfree.data.category.DefaultCategoryDataset;

 

import com.gamemag.entity.player.SilverRetained;

 

publicclass SilverLineChart {

 

    privatestatic CategoryDataset createDataset() {

               DefaultCategoryDataset dateaset = new DefaultCategoryDataset();

        dateaset.addValue(672, "苹果", "北京");

        dateaset.addValue(766, "苹果", "上海");

        dateaset.addValue(223, "苹果", "广州");

        dateaset.addValue(540, "苹果", "成都");

        dateaset.addValue(126, "苹果", "深圳");

                                 

        dateaset.addValue(325, "梨子", "北京");

        dateaset.addValue(521, "梨子", "上海");

        dateaset.addValue(210, "梨子", "广州");

        dateaset.addValue(340, "梨子", "成都");

        dateaset.addValue(106, "梨子", "深圳");

       

        dateaset.addValue(332, "葡萄", "北京");

        dateaset.addValue(766, "葡萄", "上海");

        dateaset.addValue(523, "葡萄", "广州");

        dateaset.addValue(240, "葡萄", "成都");

        dateaset.addValue(526, "葡萄", "深圳");

      

       return dateaset;

    }

 

 

 

    // 创建JFreeChar对象

    privatestatic JFreeChart createChart(CategoryDataset categoydataset) {

       JFreeChart jfreechart = ChartFactory.createLineChart("", null, null,

              categoydataset, PlotOrientation.VERTICAL, true, true, false);

       jfreechart.setTextAntiAlias(false);

       jfreechart.setBackgroundPaint(Color.WHITE);

       // 设置图标题的字体重新设置title

       Font font = new Font("线体", Font.BOLD, 25);

       TextTitle title = jfreechart.getTitle();

       title.setFont(font);

       jfreechart.setTitle(title);

 

       // 设置面板字体

       Font labelFont = new Font("SansSerif", Font.TRUETYPE_FONT, 12);

       jfreechart.setBackgroundPaint(Color.WHITE);

 

       CategoryPlot categoryplot = (CategoryPlot) jfreechart.getPlot();

       categoryplot.setDomainGridlinesVisible(true);// x轴 // 分类轴网格是否可见

       categoryplot.setRangeGridlinesVisible(true);// y轴 //数据轴网格是否可见

       categoryplot.setRangeGridlinePaint(Color.WHITE);// 虚线色彩

       categoryplot.setDomainGridlinePaint(Color.WHITE);// 虚线色彩

       categoryplot.setBackgroundPaint(Color.lightGray);

 

       jfreechart.getLegend().setItemFont(new Font("宋体", Font.BOLD, 15));// 图例文字

       jfreechart.getLegend().setPosition(RectangleEdge.RIGHT); // 图例居右

 

       // 设置轴和面板之间的距离

       // categoryplot.setAxisOffset(new RectangleInsets(5D, 5D, 5D, 5D));

       CategoryAxis domainAxis = categoryplot.getDomainAxis();

       domainAxis.setLabelFont(labelFont);// 轴标题

       domainAxis.setTickLabelFont(labelFont);// 轴数值

       // domainAxis.setAxisLineStroke(new BasicStroke(1.6f)); // 设置轴线粗细

       // domainAxis.setCategoryLabelPositions(CategoryLabelPositions.UP_45);

       // // 横轴上的 Lable ,45度倾斜

 

       domainAxis.setLowerMargin(0.0);// 设置距离图片左端距离

 

       domainAxis.setUpperMargin(0.0);// 设置距离图片右端距离

 

       NumberAxis numberaxis = (NumberAxis) categoryplot.getRangeAxis();

       numberaxis.setLabelFont(labelFont);

       numberaxis.setTickLabelFont(labelFont);

       numberaxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());

       numberaxis.setAutoRangeIncludesZero(true);

       // numberaxis.setAxisLineStroke(new BasicStroke(1.6f)); // 设置轴线粗细

 

       // 获得renderer 注意这里是下嗍造型到lineandshaperenderer！！

       LineAndShapeRenderer lineandshaperenderer = (LineAndShapeRenderer) categoryplot

              .getRenderer();

 

       lineandshaperenderer.setBaseShapesVisible(true); // series 点（即数据点）可见

       lineandshaperenderer.setBaseLinesVisible(true); // series 点（即数据点）间有连线可见

 

       // 获取折线对象 ,设置折线粗细

       LineAndShapeRenderer renderer = (LineAndShapeRenderer) categoryplot

              .getRenderer();

       BasicStroke realLine = new BasicStroke(2.8f); // 设置实线

       // 设置虚线

       float dashes[] = { 5.0f };

       BasicStroke brokenLine = new BasicStroke(8.2f, // 线条粗细

              BasicStroke.CAP_ROUND, // 端点风格

              BasicStroke.JOIN_ROUND, // 折点风格

              8f, dashes, 3.6f);

       for (int i = 0; i < categoydataset.getRowCount(); i++) {

           if (i % 2 == 0)

              renderer.setSeriesStroke(i, realLine); // 利用实线绘制

            else

            renderer.setSeriesStroke(i, brokenLine); // 利用虚线绘制

       }

 

       // 显示折点数据

       // lineandshaperenderer.setBaseItemLabelGenerator(new

       // StandardCategoryItemLabelGenerator());

       // lineandshaperenderer.setBaseItemLabelsVisible(true);

 

       return jfreechart;

    }

 

 

 

    publicstatic String generateLineChart(HttpSession session, PrintWriter out) throws IOException {

       String filename = null;

       CategoryDataset categoryDateset = createDataset();

       JFreeChart chart = createChart(categoryDateset);

       /**

        * File directory = new File(".");

        * System.out.println(directory.getCanonicalPath()+"=========="+img_path);

        *

        * FileOutputStream fos_jpg = null; try {

        *  fos_jpg = new  FileOutputStream("fruit.jpg");

        *      ChartUtilities.writeChartAsJPEG(fos_jpg, 1.0f, chart, 400,300,null);

        * } finally {

        *      try {

        *         fos_jpg.close();

        * } catch (Exception e) {} }

        **/

       ChartRenderingInfo info = new ChartRenderingInfo(

              new StandardEntityCollection());

       try {

           filename = ServletUtilities.saveChartAsPNG(chart, 600, 320, info,

                  session);

           ChartUtilities.writeImageMap(out, filename, info, false);

       } catch (IOException e) {

           e.printStackTrace();

       }

       out.flush();

       return filename;

    }

 

}

 

 

调用方式：

SilverLineChart line = new SilverLineChart();

       HttpSession  session = ServletActionContext.getRequest().getSession();

       HttpServletResponse response =  ServletActionContext.getResponse();

       PrintWriter out = response.getWriter();

      

       filename = line.generateLineChart(session, out );

       filename = "/DisplayChart?filename=" + filename;

 

 

 

<!-- jfreechar 配置web.xml -->

    <servlet>

       <servlet-name>DisplayChart</servlet-name>

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

    </servlet>

    <servlet-mapping>

       <servlet-name>dwr-invoker</servlet-name>

       <url-pattern>/dwr/*</url-pattern>

    </servlet-mapping>

       <servlet-mapping>

       <servlet-name>DisplayChart</servlet-name>

       <url-pattern>/DisplayChart</url-pattern>

    </servlet-mapping>