I. Introduction
The data we obtain after calculation is usually stored in a floating-point array, so I wrote a general function to realize the visualization of array data, the effect is as follows:
2. Procedure
2.1 Define the classes needed for drawing
It is recommended not to modify the following programs without special circumstances, just copy them directly.
package DrawLine;
import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Font;
import java.awt.Paint;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.text.NumberFormat;
import java.util.Arrays;
import java.util.List;
import java.util.Vector;
import javax.swing.SwingUtilities;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.ChartUtilities;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.StandardChartTheme;
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.plot.CategoryPlot;
import org.jfree.chart.plot.DefaultDrawingSupplier;
import org.jfree.chart.plot.PieLabelLinkStyle;
import org.jfree.chart.renderer.category.LineAndShapeRenderer;
import org.jfree.chart.renderer.category.StandardBarPainter;
import org.jfree.chart.renderer.xy.StandardXYBarPainter;
import org.jfree.data.category.DefaultCategoryDataset;
import org.jfree.ui.RectangleInsets;
import org.jfree.ui.TextAnchor;
/**
* @Title:创建折线图
* @author
* @since JDK1.6
* @history
*/
public class CreatLineChart {
/**
* Jfreechart工具类
* <p>
* 解决中午乱码问题<br>
* 用来创建类别图表数据集、创建饼图数据集、时间序列图数据集<br>
* 用来对柱状图、折线图、饼图、堆积柱状图、时间序列图的样式进行渲染<br>
* 设置X-Y坐标轴样式
* <p>
*
*/
private static String NO_DATA_MSG = "数据加载失败";
private static Font FONT = new Font("宋体", Font.PLAIN, 12);
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
/**
* 静态代码块
*/
static {
setChartTheme();
}
/**
* 无参构造器
*/
public CreatLineChart() {
}
/** TODO 可以通过调用这个方法, 提供对应格式的参数即可生成图片,并存在指定位置
* 生成一个这先出并保存为png格式,
* @param title 图片标题
* @param xtitle x轴标题
* @param ytitle y轴标题
* @param filepath 文件路径+文件名
* @param categorie 横坐标类型
* @param series 数据内容
* @param width 图片宽度
* @param height 图片高度
* @throws Exception
*/
public static void CreateNewLineChartForPng(String title,String xtitle,String ytitle,String filepath,List<String> categorie,List<Serie> series,int width,int height) throws Exception{
ChartPanel chartPanel = new CreatLineChart().createChart(title, xtitle, ytitle, categorie,series);
//将图片保存为png格式
saveAsFile(chartPanel.getChart(),filepath,width,height);
}
/**
* 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);
}
/**
* 创建类别数据集合
*/
public static DefaultCategoryDataset createDefaultCategoryDataset(List<Serie> series, String[] categories) {
DefaultCategoryDataset dataset = new DefaultCategoryDataset();
for (Serie serie : series) {
String name = serie.getName();
Vector<Object> data = serie.getData();
if (data != null && categories != null && data.size() == categories.length) {
for (int index = 0; index < data.size(); index++) {
String value = data.get(index) == null ? "" : data.get(index).toString();
if (isPercent(value)) {
value = value.substring(0, value.length() - 1);
}
if (isNumber(value)) {
dataset.setValue(Double.parseDouble(value), name, categories[index]);
}
}
}
}
return dataset;
}
/**
* 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));
}
/**
* 是不是一个%形式的百分比
*
* @param str
* @return
*/
public static boolean isPercent(String str) {
return str != null ? str.endsWith("%") && isNumber(str.substring(0, str.length() - 1)) : false;
}
/**
* 是不是一个数字
*
* @param str
* @return
*/
public static boolean isNumber(String str) {
return str != null ? str.matches("^[-+]?(([0-9]+)((([.]{0})([0-9]*))|(([.]{1})([0-9]+))))$") : false;
}
/**
* 设置 折线图样式
*
* @param plot
* @param isShowDataLabels
* 是否显示数据标签 默认不显示节点形状
*/
public static void setLineRender(CategoryPlot plot, boolean isShowDataLabels) {
setLineRender(plot, isShowDataLabels, false);
}
/**
* 设置折线图样式
*
* @param plot
* @param isShowDataLabels
* 是否显示数据标签
*/
@SuppressWarnings("deprecation")
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.setStroke(new BasicStroke(1.5F));
//renderer.setSeriesStroke(1, new BasicStroke(0.00001F));
if (isShowDataLabels) {
renderer.setBaseItemLabelsVisible(true);
renderer.setBaseItemLabelGenerator(new StandardCategoryItemLabelGenerator(StandardCategoryItemLabelGenerator.DEFAULT_LABEL_FORMAT_STRING,
NumberFormat.getInstance()));
renderer.setBasePositiveItemLabelPosition(new ItemLabelPosition(ItemLabelAnchor.OUTSIDE1, TextAnchor.BOTTOM_CENTER));// weizhi
}
renderer.setBaseShapesVisible(isShapesVisible);// 数据点绘制形状
setXAixs(plot);
setYAixs(plot);
}
/**
* 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().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);
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
// 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.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
}
/**
* 必须设置文本抗锯齿
*/
public static void setAntiAlias(JFreeChart chart) {
chart.setTextAntiAlias(false);
}
//-----------------------------------------------------------------------------------------------------------------
/**
*
* 折线图
* <p>
* 创建图表步骤：<br/>
* 1：创建数据集合<br/>
* 2：创建Chart：<br/>
* 3:设置抗锯齿，防止字体显示不清楚<br/>
* 4:对柱子进行渲染，<br/>
* 5:对其他部分进行渲染<br/>
* 6:使用chartPanel接收<br/>
* </p>
*/
//创建折线图图表
public DefaultCategoryDataset createDataset(List<String> categorie,List<Serie> series) {
// 标注类别
String[] categories = categorie.toArray(new String[categorie.size()]);
// 创建数据集合
DefaultCategoryDataset dataset = CreatLineChart.createDefaultCategoryDataset(series, categories);
return dataset;
}
/**
* 创建折线图
* @param title 折线图标题
* @param xtitle x轴标题
* @param ytitle y轴标题
* @param categorie 横坐标类别
* @param series 数据集
* @return
* @throws Exception
*/
public ChartPanel createChart(String title,String xtitle,String ytitle,List<String> categorie,List<Serie> series) throws Exception {
// 2：创建Chart[创建不同图形]
JFreeChart chart = ChartFactory.createLineChart(title, xtitle, ytitle, createDataset(categorie,series));
// 3:设置抗锯齿，防止字体显示不清楚
CreatLineChart.setAntiAlias(chart);// 抗锯齿
// 4:对柱子进行渲染[[采用不同渲染]]
CreatLineChart.setLineRender(chart.getCategoryPlot(), false,true);//
// 5:对其他部分进行渲染
CreatLineChart.setXAixs(chart.getCategoryPlot());// X坐标轴渲染
CreatLineChart.setYAixs(chart.getCategoryPlot());// Y坐标轴渲染
// 设置标注无边框
chart.getLegend().setFrame(new BlockBorder(Color.WHITE));
// 6:使用chartPanel接收
ChartPanel chartPanel = new ChartPanel(chart);
return chartPanel;
}
/**
* 主方法 用来测试 `
* @param args
*/
public static void main(String[] args) {
}
/**
* 将图表保存为PNG、JPEG图片
* @param chart 折线图对象
* @param outputPath 文件保存路径, 包含文件名
* @param weight 宽
* @param height 高
* @throws Exception
*/
public static void saveAsFile(JFreeChart chart, String outputPath, int weight, int height)throws Exception {
FileOutputStream out = null;
File outFile = new File(outputPath);
if (!outFile.getParentFile().exists()) {
outFile.getParentFile().mkdirs();
}
out = new FileOutputStream(outputPath);
// 保存为PNG
ChartUtilities.writeChartAsPNG(out, chart, weight, height);
// 保存为JPEG
// ChartUtilities.writeChartAsJPEG(out, chart, weight, height);
out.flush();
if (out != null) {
try {
out.close();
} catch (IOException e) {
// do nothing
e.printStackTrace();
}
}
}
}
Define entity class:
package DrawLine;
import java.io.Serializable;
import java.util.Vector;
/**
* 系列:名字和数据集合 构成一条曲线</br> 可以将serie看作一根线或者一根柱子：
*
* <p>
* 参照JS图表来描述数据：series: [{ name: 'Tokyo', data: [7.0, 6.9, 9.5, 14.5]
* }, { name: 'New York', data: [-0.2, 0.8, 5.7, 11.3} ]
*
*
*/
public class Serie implements Serializable {
private static final long serialVersionUID = 1L;
private String name;// 名字
private Vector<Object> data;// 数据值ֵ
public Serie() {
}
/**
*
* @param name
* 名称（线条名称）
* @param data
* 数据（线条上的所有数据值）
*/
public Serie(String name, Vector<Object> data) {
this.name = name;
this.data = data;
}
/**
*
* @param name
* 名称（线条名称）
* @param array
* 数据（线条上的所有数据值）
*/
public Serie(String name, Object[] array) {
this.name = name;
if (array != null) {
data = new Vector<Object>(array.length);
for (int i = 0; i < array.length; i++) {
data.add(array[i]);
}
}
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Vector<Object> getData() {
return data;
}
public void setData(Vector<Object> data) {
this.data = data;
}
}
2.2 Main program
package CplexTest;
import java.util.Arrays;
import java.util.List;
import java.util.Vector;
import javax.swing.JFrame;
import org.jfree.chart.ChartPanel;
import DrawLine.CreatLineChart;
import DrawLine.Serie;
public class test {
static double[] a = {
1,2,3,2,1};
static double[] b = {
2,4,3,1,2};
public static void main(String[] args) {
String[] legend = {
"曲线a","曲线b"}; //长度应该与绘制曲线数量相同
draw_line("none", "test", "x", "y", legend, a,b);
}
/** TODO 可以通过调用这个方法, 提供对应格式的参数即可生成图片
* @param outputPath 输出路径和图片名称，例如"data/test.png"，如果不需要保存则为"none"
* @param title 图片标题
* @param x_label x轴标题
* @param y_label y轴标题
* @param legend 图例
* @param data 想要绘制的浮点型数组数据，可以写入多个
* @throws Exception
*/
public static void draw_line(String outputPath, String title, String x_label, String y_label, String[] legend, double[]... data)
{
if(legend.length!=data.length)
{
System.out.println("legend与data长度不符，请修改");
}
final JFrame frame = new JFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(1800, 500);//设置图片大小
frame.setLocationRelativeTo(null);
try {
List<String> categorie = null;
List<Serie> series = null;
/*横坐标,这里是简单的定义为1，2，3，···
如果想要自定义横坐标的名称，将下面这段注释然后定义String[] categories={你自己的横坐标名，长度应该与数据长度相等};*/
String[] categories = new String[data[0].length];
for(int i=0;i<data[0].length;i++)
{
categories[i] = Integer.toString(i);
}
categorie = Arrays.asList(categories);
//数据
series = new Vector<Serie>();
// 柱子名称：柱子所有的值集合
for(int i=0;i<data.length;i++)
{
Double[] DoubleArray= new Double[data[i].length];
for(int j=0;j<data[i].length;j++)
{
DoubleArray[j]=data[i][j];
}
series.add(new Serie(legend[i], DoubleArray));
}
ChartPanel chartPanel = new CreatLineChart().createChart(title, x_label, y_label, categorie,series);
frame.getContentPane().add(chartPanel);
frame.setVisible(true);
if(outputPath!="none")
{
CreatLineChart.saveAsFile(chartPanel.getChart(),outputPath,900,500);
}
} catch (Exception e1) {
e1.printStackTrace();
}
}
}