java利用Jfreechart生成图表(折线/饼图)
后台生成图表并生成图片保存,不需要前端.
添加依赖
org.jfree
jfreechart
1.5.0
编写工具类(目前实现折线图和饼图)
import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Font;
import java.awt.Paint;
import java.awt.Rectangle;
import java.io.File;
import java.text.NumberFormat;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.StandardChartTheme;
import org.jfree.chart.axis.CategoryLabelPositions;
import org.jfree.chart.axis.ValueAxis;
import org.jfree.chart.block.BlockBorder;
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.DefaultDrawingSupplier;
import org.jfree.chart.plot.PieLabelLinkStyle;
import org.jfree.chart.plot.PiePlot;
import org.jfree.chart.plot.Plot;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.plot.XYPlot;
import org.jfree.chart.renderer.category.LineAndShapeRenderer;
import org.jfree.chart.renderer.category.StandardBarPainter;
import org.jfree.chart.renderer.xy.StandardXYBarPainter;
import org.jfree.chart.ui.RectangleInsets;
import org.jfree.chart.ui.TextAnchor;
import org.jfree.data.category.DefaultCategoryDataset;
import org.jfree.data.general.DefaultPieDataset;
/**
* @Description:绘制图表(折线图/饼图)
*/
@SuppressWarnings("rawtypes")
public class ChartUtils {
private static String NO_DATA_MSG = "暂无数据";
private static Font FONT = new Font("宋体", Font.PLAIN, 20);
public static Color[] CHART_COLORS = {
new Color(31,129,188), new Color(92,92,97), new Color(144,237,125), new Color(255,188,117),
new Color(153,158,255), new Color(255,117,153), new Color(253,236,109), new Color(128,133,232),
new Color(158,90,102),new Color(255, 204, 102) };// 颜色
static{
setChartTheme();
}
/**
* 中文主题样式 解决乱码
*/
public static void setChartTheme() {
// 设置中文主题样式 解决乱码
StandardChartTheme chartTheme = new StandardChartTheme("CN");
// 设置标题字体
chartTheme.setExtraLargeFont(FONT);
// 设置图例的字体
chartTheme.setRegularFont(FONT);
// 设置轴向的字体
chartTheme.setLargeFont(FONT);
chartTheme.setSmallFont(FONT);
chartTheme.setTitlePaint(new Color(51, 51, 51));
chartTheme.setSubtitlePaint(new Color(85, 85, 85));
chartTheme.setLegendBackgroundPaint(Color.WHITE);// 设置标注
chartTheme.setLegendItemPaint(Color.BLACK);//
chartTheme.setChartBackgroundPaint(Color.WHITE);
// 绘制颜色绘制颜色.轮廓供应商
// paintSequence,outlinePaintSequence,strokeSequence,outlineStrokeSequence,shapeSequence
Paint[] OUTLINE_PAINT_SEQUENCE = new Paint[] { Color.WHITE };
// 绘制器颜色源
DefaultDrawingSupplier drawingSupplier = new DefaultDrawingSupplier(CHART_COLORS, CHART_COLORS, OUTLINE_PAINT_SEQUENCE,
DefaultDrawingSupplier.DEFAULT_STROKE_SEQUENCE, DefaultDrawingSupplier.DEFAULT_OUTLINE_STROKE_SEQUENCE,
DefaultDrawingSupplier.DEFAULT_SHAPE_SEQUENCE);
chartTheme.setDrawingSupplier(drawingSupplier);
chartTheme.setPlotBackgroundPaint(Color.WHITE);// 绘制区域
chartTheme.setPlotOutlinePaint(Color.WHITE);// 绘制区域外边框
chartTheme.setLabelLinkPaint(new Color(8, 55, 114));// 链接标签颜色
chartTheme.setLabelLinkStyle(PieLabelLinkStyle.CUBIC_CURVE);
chartTheme.setAxisOffset(new RectangleInsets(5, 12, 5, 12));
chartTheme.setDomainGridlinePaint(new Color(192, 208, 224));// X坐标轴垂直网格颜色
chartTheme.setRangeGridlinePaint(new Color(192, 192, 192));// Y坐标轴水平网格颜色
chartTheme.setBaselinePaint(Color.WHITE);
chartTheme.setCrosshairPaint(Color.BLUE);// 不确定含义
chartTheme.setAxisLabelPaint(new Color(51, 51, 51));// 坐标轴标题文字颜色
chartTheme.setTickLabelPaint(new Color(67, 67, 72));// 刻度数字
chartTheme.setBarPainter(new StandardBarPainter());// 设置柱状图渲染
chartTheme.setXYBarPainter(new StandardXYBarPainter());// XYBar 渲染
chartTheme.setItemLabelPaint(Color.black);
chartTheme.setThermometerPaint(Color.white);// 温度计
ChartFactory.setChartTheme(chartTheme);
}
public ChartUtils() {
}
/**
* 必须设置文本抗锯齿
*/
public static void setAntiAlias(JFreeChart chart) {
chart.setTextAntiAlias(false);
}
/**
* 设置图例无边框，默认黑色边框
*/
public static void setLegendEmptyBorder(JFreeChart chart) {
chart.getLegend().setFrame(new BlockBorder(Color.WHITE));
}
/**
* 提供静态方法：获取报表图形1：饼状图
* @param title 标题
* @param datas 数据
* @param font 字体
*/
public static void createPiePort(String title,Map datas,String url){
try {
// 如果不使用Font,中文将显示不出来
DefaultPieDataset pds = new DefaultPieDataset();
// 获取迭代器：
Set> set = datas.entrySet();
Iterator iterator=(Iterator) set.iterator();
Entry entry=null;
while(iterator.hasNext()){
entry=(Entry) iterator.next();
pds.setValue(entry.getKey().toString(),Double.parseDouble(entry.getValue().toString()));
}
/**
* 生成一个饼图的图表
* 分别是:显示图表的标题、需要提供对应图表的DateSet对象、是否显示图例、是否生成贴士以及是否生成URL链接
*/
JFreeChart chart = ChartFactory.createPieChart(title, pds, true, false, true);
setPieRender((PiePlot) chart.getPlot());
//将内存中的图片写到本地硬盘
org.jfree.chart.ChartUtils.saveChartAsPNG(new File(url), chart,800,500);
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* 提供静态方法：获取报表图形3：折线图
* @param title 标题
* @param datas 数据
* @param type 分类（第一季，第二季.....）
* @param danwei 柱状图的数量单位
* @param font 字体
*/
public static void createLinePort(String title,Map datas,String xName,String yName,String url){
try {
//种类数据集
DefaultCategoryDataset dataset = new DefaultCategoryDataset();
//获取迭代器：
Set> set = datas.entrySet();
Iterator iterator=(Iterator) set.iterator();
Entry entry=null;
while(iterator.hasNext()){
entry=(Entry) iterator.next();
dataset.setValue(Double.parseDouble(entry.getValue().toString()),//y
title, //名称
entry.getKey().toString()); //x
}
//创建折线图,折线图分水平显示和垂直显示两种
JFreeChart chart = ChartFactory.createLineChart(title, xName, yName, dataset,//2D折线图
PlotOrientation.VERTICAL,
false, // 是否显示图例(对于简单的柱状图必须是false)
true, // 是否生成工具
true);// 是否生成URL链接
//得到绘图区
setLineRender((CategoryPlot)chart.getPlot(),true,true);
org.jfree.chart.ChartUtils.saveChartAsPNG(new File(url), chart, 1000,600);
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* 设置折线图样式
*
* @param plot
* @param isShowDataLabels
* 是否显示数据标签
*/
public static void setLineRender(CategoryPlot plot, boolean isShowDataLabels, boolean isShapesVisible) {
plot.setNoDataMessage(NO_DATA_MSG);
plot.setInsets(new RectangleInsets(10, 10, 0, 10), false);
LineAndShapeRenderer renderer = (LineAndShapeRenderer) plot.getRenderer();
renderer.setDefaultStroke(new BasicStroke(1.5F));
if (isShowDataLabels) {
renderer.setDefaultItemLabelsVisible(true);
renderer.setDefaultItemLabelGenerator(new StandardCategoryItemLabelGenerator(StandardCategoryItemLabelGenerator.DEFAULT_LABEL_FORMAT_STRING,
NumberFormat.getInstance()));
renderer.setDefaultPositiveItemLabelPosition(new ItemLabelPosition(ItemLabelAnchor.OUTSIDE1, TextAnchor.BOTTOM_CENTER));// weizhi
}
renderer.setDefaultShapesVisible(isShapesVisible);// 数据点绘制形状
setXAixs(plot);
setYAixs(plot);
}
/**
* 设置饼状图渲染
*/
public static void setPieRender(Plot plot) {
plot.setNoDataMessage(NO_DATA_MSG);
plot.setInsets(new RectangleInsets(10, 10, 5, 10));
PiePlot piePlot = (PiePlot) plot;
piePlot.setInsets(new RectangleInsets(0, 0, 0, 0));
piePlot.setCircular(true);// 圆形
// piePlot.setSimpleLabels(true);// 简单标签
piePlot.setLabelGap(0.01);
piePlot.setInteriorGap(0.05D);
piePlot.setLegendItemShape(new Rectangle(10, 10));// 图例形状
piePlot.setIgnoreNullValues(true);
piePlot.setLabelBackgroundPaint(null);// 去掉背景色
piePlot.setLabelShadowPaint(null);// 去掉阴影
piePlot.setLabelOutlinePaint(null);// 去掉边框
piePlot.setShadowPaint(null);
// 0:category 1:value:2 :percentage
piePlot.setLabelGenerator(new StandardPieSectionLabelGenerator("{0}:{2}"));// 显示标签数据
}
/**
* 设置类别图表(CategoryPlot) X坐标轴线条颜色和样式
*
* @param axis
*/
public static void setXAixs(CategoryPlot plot) {
Color lineColor = new Color(31, 121, 170);
plot.getDomainAxis().setCategoryLabelPositions(CategoryLabelPositions.UP_45);
plot.getDomainAxis().setAxisLinePaint(lineColor);// X坐标轴颜色
plot.getDomainAxis().setTickMarkPaint(lineColor);// X坐标轴标记|竖线颜色
}
/**
* 设置类别图表(CategoryPlot) Y坐标轴线条颜色和样式 同时防止数据无法显示
*
* @param axis
*/
public static void setYAixs(CategoryPlot plot) {
// Color lineColor = new Color(192, 208, 224);
Color lineColor = new Color(31, 121, 170);
ValueAxis axis = plot.getRangeAxis();
axis.setAxisLinePaint(lineColor);// Y坐标轴颜色
axis.setTickMarkPaint(lineColor);// Y坐标轴标记|竖线颜色
// false隐藏Y刻度
axis.setAxisLineVisible(true);
axis.setTickMarksVisible(true);
// Y轴网格线条
plot.setRangeGridlinePaint(new Color(192, 192, 192));
plot.setRangeGridlineStroke(new BasicStroke(1));
plot.getRangeAxis().setUpperMargin(0.1);// 设置顶部Y坐标轴间距,防止数据无法显示
plot.getRangeAxis().setLowerMargin(0.1);// 设置底部Y坐标轴间距
}
/**
* 设置XY图表(XYPlot) X坐标轴线条颜色和样式
*
* @param axis
*/
public static void setXY_XAixs(XYPlot plot) {
Color lineColor = new Color(31, 121, 170);
plot.getDomainAxis().setAxisLinePaint(lineColor);// X坐标轴颜色
plot.getDomainAxis().setTickMarkPaint(lineColor);// X坐标轴标记|竖线颜色
}
/**
* 设置XY图表(XYPlot) Y坐标轴线条颜色和样式 同时防止数据无法显示
*
* @param axis
*/
public static void setXY_YAixs(XYPlot plot) {
Color lineColor = new Color(192, 208, 224);
ValueAxis axis = plot.getRangeAxis();
axis.setAxisLinePaint(lineColor);// X坐标轴颜色
axis.setTickMarkPaint(lineColor);// X坐标轴标记|竖线颜色
// 隐藏Y刻度
axis.setAxisLineVisible(false);
axis.setTickMarksVisible(false);
// Y轴网格线条
plot.setRangeGridlinePaint(new Color(192, 192, 192));
plot.setRangeGridlineStroke(new BasicStroke(1));
plot.setDomainGridlinesVisible(false);
plot.getRangeAxis().setUpperMargin(0.12);// 设置顶部Y坐标轴间距,防止数据无法显示
plot.getRangeAxis().setLowerMargin(0.12);// 设置底部Y坐标轴间距
}
public static void main(String[] args) {
ChartUtils utils = new ChartUtils();
Map map=new HashMap();
map.put("天使", (double) 1000);
map.put("雄兵连", (double) 700);
map.put("太阳之光", (double) 600);
map.put("辅助", (double) 400);
createPiePort("超神学院女神投票结果", map,"E:\\test\\aa.jpg");
Map map1=new HashMap();
//设置第一期的投票信息
map1.put("2020-02-03", (double) 700);
map1.put("2020-02-04", (double) 1000);
map1.put("2020-02-05", (double) 600);
map1.put("2020-02-06", (double) 400);
map1.put("2020-02-07", (double) 4000);
map1.put("2020-02-08", (double) 1200);
map1.put("2020-02-09", (double) 800);
createLinePort("近7日金额(日报)",map1,"日期","金额（元）","E:\\test\\cc.jpg");
}
}
运行main方法,完成