需要的jar包：
jfreechart-1.0.13.jar
jcommon-1.0.14.jar
package com.viathink.lims.util;import java.awt.Color;import java.awt.Font;import java.io.File;import java.io.FileOutputStream;import java.io.IOException;import java.text.DecimalFormat;import java.text.NumberFormat;import java.util.List;import java.util.Map;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.CategoryLabelPositions;import org.jfree.chart.axis.NumberAxis;import org.jfree.chart.axis.ValueAxis;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.LineAndShapeRenderer;import org.jfree.data.category.CategoryDataset;import org.jfree.data.category.DefaultCategoryDataset;import org.jfree.data.general.DefaultPieDataset;import org.jfree.ui.RectangleInsets;public class ChartImgUtil {/*** 创建折线图* * @param dateList* map的key:'name'为x轴值 count为y轴值* @param title* 标题名* @param xName* X轴标题* @param yName* Y轴标题* @param imgPath* 图片存储路径* @throws Exception*/public static void writeLineImg(List<Map<String, Object>> dateList, String title, String xName, String yName,String imgPath) throws Exception {DefaultCategoryDataset dataset = getLineDataset(dateList);JFreeChart chart = ChartFactory.createLineChart(title, // 标题xName, // categoryAxisLabel （category轴，横轴，X轴标签）yName, // valueAxisLabel（value轴，纵轴，Y轴的标签）dataset, // datasetPlotOrientation.VERTICAL, false, // legendfalse, // tooltipsfalse); // URLschart.setBackgroundPaint(Color.WHITE);chart.setBackgroundPaint(Color.WHITE);// 配置字体（解决中文乱码的通用方法）Font xfont = new Font("黑体", Font.BOLD, 14); // X轴Font yfont = new Font("黑体", Font.BOLD, 14); // Y轴Font titleFont = new Font("宋体", Font.BOLD, 20); // 图片标题CategoryPlot categoryPlot = chart.getCategoryPlot();categoryPlot.getDomainAxis().setLabelFont(xfont);categoryPlot.getRangeAxis().setLabelFont(yfont);chart.getTitle().setFont(titleFont);categoryPlot.setBackgroundPaint(Color.WHITE);// x轴 // 分类轴网格是否可见categoryPlot.setDomainGridlinesVisible(true);// y轴 //数据轴网格是否可见categoryPlot.setRangeGridlinesVisible(true);// 设置网格竖线颜色categoryPlot.setDomainGridlinePaint(Color.LIGHT_GRAY);// 设置网格横线颜色categoryPlot.setRangeGridlinePaint(Color.LIGHT_GRAY);// 没有数据时显示的文字说明categoryPlot.setNoDataMessage("没有数据显示");// 设置曲线图与xy轴的距离categoryPlot.setAxisOffset(new RectangleInsets(0d, 0d, 0d, 0d));// 设置面板字体Font labelFont = new Font("黑体", Font.BOLD, 14);// 取得Y轴NumberAxis rangeAxis = (NumberAxis) categoryPlot.getRangeAxis();rangeAxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());rangeAxis.setAutoRangeIncludesZero(true);rangeAxis.setUpperMargin(0.20);rangeAxis.setLabelAngle(Math.PI / 2.0);//注释此行Y轴小标题 垂直显示// 取得X轴CategoryAxis categoryAxis = (CategoryAxis) categoryPlot.getDomainAxis();// 设置X轴坐标上的文字categoryAxis.setTickLabelFont(labelFont);// 设置X轴的标题文字categoryAxis.setLabelFont(labelFont);// 横轴上的 Lable 45度倾斜categoryAxis.setCategoryLabelPositions(CategoryLabelPositions.UP_45);// 设置距离图片左端距离categoryAxis.setLowerMargin(0.0);// 设置距离图片右端距离categoryAxis.setUpperMargin(0.0);// 获得renderer 注意这里是下嗍造型到lineandshaperenderer！！LineAndShapeRenderer lineandshaperenderer = (LineAndShapeRenderer) categoryPlot.getRenderer();// 是否显示折点lineandshaperenderer.setBaseShapesVisible(true);// 是否显示折线lineandshaperenderer.setBaseLinesVisible(true);// series 点（即数据点）间有连线可见 显示折点数据lineandshaperenderer.setBaseItemLabelGenerator(new StandardCategoryItemLabelGenerator());lineandshaperenderer.setBaseItemLabelsVisible(true);creatImg(chart, imgPath);}/*** 创建柱形图* * @param dateList* map的key:'name'为x轴值 count为y轴值* @param title* 标题名* @param xName* X轴标题* @param yName* Y轴标题* @param imgPath* 图片存储路径* @throws Exception*/public static void writeBarImg(List<Map<String, Object>> dateList, String title, String xName, String yName,String imgPath) throws Exception {CategoryDataset dataset = getBarDataSet(dateList);JFreeChart chart = ChartFactory.createBarChart3D(title, // 图表标题xName, // 目录轴的显示标签yName, // 数值轴的显示标签dataset, // 数据集PlotOrientation.VERTICAL, // 图表方向：水平、垂直false, // 是否显示图例(对于简单的柱状图必须是false)false, // 是否生成工具false // 是否生成URL链接);// 从这里开始CategoryPlot plot = chart.getCategoryPlot();// 获取图表区域对象CategoryAxis domainAxis = plot.getDomainAxis(); // 水平底部列表domainAxis.setLabelFont(new Font("黑体", Font.BOLD, 14)); // 水平底部标题domainAxis.setTickLabelFont(new Font("黑体", Font.BOLD, 14)); // 垂直标题// 横轴上的 Lable 45度倾斜domainAxis.setCategoryLabelPositions(CategoryLabelPositions.UP_45);ValueAxis rangeAxis = plot.getRangeAxis();// 获取柱状rangeAxis.setLabelFont(new Font("黑体", Font.BOLD, 15));// chart.getLegend().setItemFont(new Font("黑体", Font.BOLD, 15));//不显示图例，此行必须注释chart.getTitle().setFont(new Font("宋体", Font.BOLD, 20));// 设置标题字体rangeAxis.setUpperMargin(0.1);// 设置顶部Y坐标轴间距,防止数据无法显示rangeAxis.setLowerMargin(0.1);// 设置底部Y坐标轴间距creatImg(chart, imgPath);}/*** 创建饼图* * @param dateList* map的key:'name'为x轴值 count为y轴值* @param title* 标题名* @param xName* X轴标题* @param yName* Y轴标题* @param imgPath* 图片存储路径* @throws Exception*/public static void writePieImg(List<Map<String, Object>> dateList, String title, String xName, String yName,String imgPath) throws Exception {DefaultPieDataset data = getPieDataSet(dateList);JFreeChart chart = ChartFactory.createPieChart3D(title, data, false, false, false);// 设置百分比PiePlot pieplot = (PiePlot) chart.getPlot();DecimalFormat df = new DecimalFormat("0.00%");// 获得一个DecimalFormat对象，主要是设置小数问题NumberFormat nf = NumberFormat.getNumberInstance();// 获得一个NumberFormat对象//StandardPieSectionLabelGenerator sp1 = new StandardPieSectionLabelGenerator("{0} {2}", nf, df);// 获得StandardPieSectionLabelGenerator对象pieplot.setLabelGenerator(new StandardPieSectionLabelGenerator("{0}:{1}({2})", nf, df));// 设置饼图显示百分比// 没有数据的时候显示的内容pieplot.setNoDataMessage("无数据显示");pieplot.setCircular(false);pieplot.setLabelGap(0.02D);pieplot.setIgnoreNullValues(true);// 设置不显示空值pieplot.setIgnoreZeroValues(true);// 设置不显示负值chart.getTitle().setFont(new Font("宋体", Font.BOLD, 20));// 设置标题字体PiePlot piePlot = (PiePlot) chart.getPlot();// 获取图表区域对象piePlot.setLabelFont(new Font("宋体", Font.BOLD, 15));// 解决乱码creatImg(chart, imgPath);}public static void creatImg(JFreeChart chart, String path) throws Exception {FileOutputStream out = null;File outFile = new File(path);out = new FileOutputStream(outFile);// 保存为JPEGChartUtilities.writeChartAsJPEG(out, chart, 800, 600);// 保存为PNG// ChartUtilities.writeChartAsPNG(out, chart, weight, height);out.flush();if (out != null) {try {out.close();} catch (IOException e) {// do nothinge.printStackTrace();}}}private static DefaultCategoryDataset getLineDataset(List<Map<String, Object>> dateList) {DefaultCategoryDataset dataset = new DefaultCategoryDataset();for (Map<String, Object> map : dateList) {dataset.setValue(Integer.parseInt(map.get("count").toString()), "", map.get("name").toString());}return dataset;}private static CategoryDataset getBarDataSet(List<Map<String, Object>> dateList) {DefaultCategoryDataset dataset = new DefaultCategoryDataset();for (Map<String, Object> map : dateList) {dataset.addValue(Integer.parseInt(map.get("count").toString()), map.get("name").toString(), map.get("name").toString());}return dataset;}private static DefaultPieDataset getPieDataSet(List<Map<String, Object>> dateList) {DefaultPieDataset dataset = new DefaultPieDataset();for (Map<String, Object> map : dateList) {dataset.setValue(map.get("name").toString(), Integer.parseInt(map.get("count").toString()));}return dataset;}}
