JFreechart工具类
import java.awt.BasicStroke;import java.awt.Color;import java.awt.Font;import java.io.IOException;import java.text.DecimalFormat;import java.text.NumberFormat;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpSession;import org.apache.struts2.ServletActionContext;import org.jfree.chart.ChartFactory;import org.jfree.chart.JFreeChart;import org.jfree.chart.axis.CategoryAxis;import org.jfree.chart.axis.NumberAxis;import org.jfree.chart.axis.ValueAxis;import org.jfree.chart.labels.ItemLabelAnchor;import org.jfree.chart.labels.ItemLabelPosition;import org.jfree.chart.labels.StandardCategoryItemLabelGenerator;import org.jfree.chart.labels.StandardPieSectionLabelGenerator;import org.jfree.chart.plot.CategoryPlot;import org.jfree.chart.plot.PiePlot;import org.jfree.chart.plot.PlotOrientation;import org.jfree.chart.renderer.category.BarRenderer3D;import org.jfree.chart.renderer.category.CategoryItemRenderer;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 org.jfree.data.general.DefaultPieDataset;import org.jfree.ui.TextAnchor;public class JFreeChartUtil {/** * 根据参数创建曲线图 * * @author HeCheng * @time 2010-12-13 15:56:42 * * @return */public static String[] createLineChartByCategoryDataset(CategoryDataset dataset, String firstTitle, String subTitle,int width, int height, int min, int max) {int pieWidth = getLineWidth(width);int pieHeight = getlineHeight(height);String fileName = "";String fileUrl = "";JFreeChart chart = ChartFactory.createLineChart(firstTitle, "", "",dataset, PlotOrientation.VERTICAL, true, true, true);chart.setBackgroundPaint(Color.white);// 设置子标题TextTitle subtitle = new TextTitle(subTitle, new Font("黑体", Font.BOLD,12));chart.addSubtitle(subtitle);Font titleFont = new Font("宋体", Font.PLAIN, 25); // 图片标题Font itemfont = new Font("宋体", Font.PLAIN, 15);// 图示字体chart.getTitle().setFont(titleFont);chart.getLegend().setItemFont(itemfont); // 设置最底下方框内的字体（图示）chart.getLegend().setVisible(false);// 不显示图示// 其他参数final CategoryPlot plot = (CategoryPlot) chart.getPlot();CategoryItemRenderer cgir = plot.getRenderer();// 在数量点上显示数值cgir.setBaseItemLabelsVisible(true);cgir.setBasePositiveItemLabelPosition(new ItemLabelPosition(ItemLabelAnchor.OUTSIDE12, TextAnchor.BASELINE_LEFT));cgir.setBaseItemLabelGenerator(new StandardCategoryItemLabelGenerator());// 设置数值字体cgir.setBaseItemLabelFont(new Font("Dialog", 0, 12));// 是否显示数值cgir.setBaseItemLabelsVisible(true);// 回传plot.setRenderer(cgir);// 背景色，线条色plot.setBackgroundPaint(Color.white);plot.setRangeGridlinePaint(Color.pink);// 线条属性NumberAxis rangeAxis = (NumberAxis) plot.getRangeAxis();rangeAxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());rangeAxis.setLowerBound(min);rangeAxis.setUpperBound(max);rangeAxis.setAutoRangeIncludesZero(false);// 其他属性final LineAndShapeRenderer renderer = (LineAndShapeRenderer) plot.getRenderer();renderer.setDrawOutlines(true);renderer.setSeriesStroke(0, new BasicStroke(2.0f,BasicStroke.CAP_ROUND, BasicStroke.JOIN_ROUND, 1.0f,new float[] { 10.0f, 6.0f }, 0.0f));renderer.setSeriesStroke(1, new BasicStroke(2.0f,BasicStroke.CAP_ROUND, BasicStroke.JOIN_ROUND, 1.0f,new float[] { 6.0f, 6.0f }, 0.0f));renderer.setSeriesStroke(2, new BasicStroke(2.0f,BasicStroke.CAP_ROUND, BasicStroke.JOIN_ROUND, 1.0f,new float[] { 2.0f, 6.0f }, 0.0f));HttpServletRequest request = ServletActionContext.getRequest();HttpSession session = request.getSession();try {fileName = ServletUtilities.saveChartAsPNG(chart, pieWidth,pieHeight, null, session);} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}fileUrl = request.getContextPath() + "/DisplayChart?filename="+ fileName;return new String[] { fileName, fileUrl };}/** * 获取曲线图默认宽度 * * @param width * @return */public static int getLineWidth(int width) {switch (width) {case 0:return 350;case 1:return 1000;default:return width;}}/** * 获取曲线图默认高度 * * @param width * @return */public static int getlineHeight(int height) {switch (height) {case 0:return 300;case 1:return 560;default:return height;}}/** * 根据参数创建饼图 * * @author HeCheng * @time 2010-12-10 09:57:29 * @param dataset * @return */public static String[] createPieChartByDefaultPieDataset(DefaultPieDataset dataset, String imageName, int width, int height) {int pieWidth = getPieWidth(width);int pieHeight = getPieHeight(height);String fileName = "";String fileUrl = "";JFreeChart chart = ChartFactory.createPieChart(imageName, dataset,true, false, false);PiePlot pieplot = (PiePlot) chart.getPlot();// 设置标题栏字体chart.getTitle().setFont(new Font("宋体", com.lowagie.text.Font.BOLD, 20));// 设置图块标识字体pieplot.setLabelFont(new Font("宋体", com.lowagie.text.Font.BOLD, 12));// 设置背景颜色pieplot.setBackgroundPaint(Color.white);// 设置饼图边框是否显示pieplot.setOutlineVisible(false);// 设置下方类别字体chart.getLegend().setItemFont(new Font("宋体", com.lowagie.text.Font.BOLD, 12));// 设置每一个方块里显示的内容，为name:数量(百分比),第2和第3个参数为格式化pieplot.setLabelGenerator(new StandardPieSectionLabelGenerator("{0}:{1}({2}) ", NumberFormat.getNumberInstance(),new DecimalFormat("0.0000%")));HttpServletRequest request = ServletActionContext.getRequest();HttpSession session = request.getSession();try {fileName = ServletUtilities.saveChartAsPNG(chart, pieWidth,pieHeight, null, session);} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}fileUrl = request.getContextPath() + "/DisplayChart?filename="+ fileName;return new String[] { fileName, fileUrl };}/** * 获取饼图默认宽度 * * @param width * @return */public static int getPieWidth(int width) {switch (width) {case 0:return 700;case 1:return 1000;default:return width;}}/** * 获取饼图默认高度 * * @param width * @return */public static int getPieHeight(int height) {switch (height) {case 0:return 450;case 1:return 560;default:return height;}}/** * 根据参数创建柱形图 * * @author HeCheng * @time 2010-12-10 09:59:46 * @return */public String[] createBarChartByDefaultCategoryDataset(DefaultCategoryDataset dataset) {String fileName = "";String fileUrl = "";// 第3个boolean值表示是否显示dataset的第二项JFreeChart chart = ChartFactory.createBarChart3D("肉类销量统计图", "四省对比情况","销量", dataset, PlotOrientation.VERTICAL, true, true, true);CategoryPlot plot = chart.getCategoryPlot();// 获取图表区域对象CategoryAxis domainAxis = plot.getDomainAxis();// 设置标题字体chart.getTitle().setFont(new Font("宋体", Font.BOLD, 20));// 小标题字体domainAxis.setLabelFont(new Font("黑体", Font.BOLD, 14));// 各项字体（柱形下方）domainAxis.setTickLabelFont(new Font("宋体", Font.BOLD, 12));// 垂直标题ValueAxis rangeAxis = plot.getRangeAxis();// 获取柱状// 数值单位字体rangeAxis.setLabelFont(new Font("黑体", Font.BOLD, 15));// 各项字体（最下方）chart.getLegend().setItemFont(new Font("黑体", Font.BOLD, 15));CategoryPlot plot1 = chart.getCategoryPlot();// 设置网格背景颜色// plot1.setBackgroundPaint(Color.white);// 设置网格竖线颜色// plot1.setDomainGridlinePaint(Color.pink);// 设置网格横线颜色plot1.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);// 默认的数字显示在柱子中，通过如下两句可调整数字的显示// 将数字显示出来renderer.setBasePositiveItemLabelPosition(new ItemLabelPosition(ItemLabelAnchor.OUTSIDE12, TextAnchor.BASELINE_LEFT));renderer.setItemLabelAnchorOffset(10D);// 设置每个地区所包含的平行柱的之间距离renderer.setItemMargin(0.2);plot1.setRenderer(renderer);HttpServletRequest request = ServletActionContext.getRequest();HttpSession session = request.getSession();try {fileName = ServletUtilities.saveChartAsPNG(chart, 500, 300, null,session);} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}fileUrl = request.getContextPath() + "/DisplayChart?filename="+ fileName;return new String[] { fileName, fileUrl };}}