import java.awt.Color;
import java.io.*;
import java.util.ArrayList;
import java.util.List;import org.jfree.data.*;
import org.jfree.chart.*;
import org.jfree.chart.plot.*;
import org.jfree.chart.renderer.category.BarRenderer3D;
import org.jfree.data.category.CategoryDataset;
import org.jfree.data.category.DefaultCategoryDataset;
import org.jfree.chart.demo.BarChartDemo1; public class JFreeBarChartDemo {
public static void main(String[] args) throws IOException{
//第一步:设置数据源
CategoryDataset dataset = getDataSet2();
//第二步:生成jfreechart图形
JFreeChart chart = ChartFactory.createBarChart3D(
"水果产量图", // 图表标题
"水果", // 目录轴的显示标签
"产量", // 数值轴的显示标签
dataset, // 数据集
PlotOrientation.VERTICAL, // 图表方向:水平、垂直
true, // 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
);
// 第三步:生成装载图形的特殊面板 [Jv5kl_Q{
chart.setTitle("这里设置标题");
CategoryPlot plot = chart.getCategoryPlot();
//设置颜色 BarRenderer3D renderer = new BarRenderer3D();
renderer.setSeriesPaint(0, Color.green);
renderer.setSeriesPaint(1, new Color(0, 100, 255));
renderer.setSeriesPaint(2, Color.RED); plot.setRenderer(renderer);
FileOutputStream fos_jpg = null;
try {
fos_jpg = new FileOutputStream("D:\fruit.jpg");
ChartUtilities.writeChartAsJPEG(fos_jpg,1,chart,400,300,null);
} finally {
try {
fos_jpg.close();
} catch (Exception e) {}
}
}
private static CategoryDataset getDataSet() {
DefaultCategoryDataset dataset = new DefaultCategoryDataset();
dataset.addValue(100, null, "苹果");
dataset.addValue(200, null, "梨子");
dataset.addValue(300, null, "葡萄");
dataset.addValue(400, null, "香蕉");
dataset.addValue(500, null, "荔枝");
return dataset;
}
private static CategoryDataset getDataSet2() {
DefaultCategoryDataset dataset = new DefaultCategoryDataset();
dataset.addValue(100, "北京", "苹果");
dataset.addValue(100, "上海", "苹果");
dataset.addValue(100, "广州", "苹果");
dataset.addValue(200, "北京", "梨子");
dataset.addValue(200, "上海", "梨子");
dataset.addValue(200, "广州", "梨子");
dataset.addValue(300, "北京", "葡萄");
dataset.addValue(300, "上海", "葡萄");
dataset.addValue(300, "广州", "葡萄");
dataset.addValue(400, "北京", "香蕉");
dataset.addValue(400, "上海", "香蕉");
dataset.addValue(400, "广州", "香蕉");
dataset.addValue(500, "北京", "荔枝");
dataset.addValue(500, "上海", "荔枝");
dataset.addValue(500, "广州", "荔枝");
return dataset;
}
}
运行出现下面错误:
Exception in thread "main"java.io.FileNotFoundException:D:fruit.jpg<文件名、目录名或卷标语法不正确>
at java.io.FileOutputStream.open<Native Method>
at java.io.FileOutputStream.<init><FileOutputStream.java:179>
at java.io.FileOutputStream.<init><FileOutputStream.java:70>
at JFreeBarChartDemo.main< JFreeBarChartDemo.java:46>
import java.io.*;
import java.util.ArrayList;
import java.util.List;import org.jfree.data.*;
import org.jfree.chart.*;
import org.jfree.chart.plot.*;
import org.jfree.chart.renderer.category.BarRenderer3D;
import org.jfree.data.category.CategoryDataset;
import org.jfree.data.category.DefaultCategoryDataset;
import org.jfree.chart.demo.BarChartDemo1; public class JFreeBarChartDemo {
public static void main(String[] args) throws IOException{
//第一步:设置数据源
CategoryDataset dataset = getDataSet2();
//第二步:生成jfreechart图形
JFreeChart chart = ChartFactory.createBarChart3D(
"水果产量图", // 图表标题
"水果", // 目录轴的显示标签
"产量", // 数值轴的显示标签
dataset, // 数据集
PlotOrientation.VERTICAL, // 图表方向:水平、垂直
true, // 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
);
// 第三步:生成装载图形的特殊面板 [Jv5kl_Q{
chart.setTitle("这里设置标题");
CategoryPlot plot = chart.getCategoryPlot();
//设置颜色 BarRenderer3D renderer = new BarRenderer3D();
renderer.setSeriesPaint(0, Color.green);
renderer.setSeriesPaint(1, new Color(0, 100, 255));
renderer.setSeriesPaint(2, Color.RED); plot.setRenderer(renderer);
FileOutputStream fos_jpg = null;
try {
fos_jpg = new FileOutputStream("D:\fruit.jpg");
ChartUtilities.writeChartAsJPEG(fos_jpg,1,chart,400,300,null);
} finally {
try {
fos_jpg.close();
} catch (Exception e) {}
}
}
private static CategoryDataset getDataSet() {
DefaultCategoryDataset dataset = new DefaultCategoryDataset();
dataset.addValue(100, null, "苹果");
dataset.addValue(200, null, "梨子");
dataset.addValue(300, null, "葡萄");
dataset.addValue(400, null, "香蕉");
dataset.addValue(500, null, "荔枝");
return dataset;
}
private static CategoryDataset getDataSet2() {
DefaultCategoryDataset dataset = new DefaultCategoryDataset();
dataset.addValue(100, "北京", "苹果");
dataset.addValue(100, "上海", "苹果");
dataset.addValue(100, "广州", "苹果");
dataset.addValue(200, "北京", "梨子");
dataset.addValue(200, "上海", "梨子");
dataset.addValue(200, "广州", "梨子");
dataset.addValue(300, "北京", "葡萄");
dataset.addValue(300, "上海", "葡萄");
dataset.addValue(300, "广州", "葡萄");
dataset.addValue(400, "北京", "香蕉");
dataset.addValue(400, "上海", "香蕉");
dataset.addValue(400, "广州", "香蕉");
dataset.addValue(500, "北京", "荔枝");
dataset.addValue(500, "上海", "荔枝");
dataset.addValue(500, "广州", "荔枝");
return dataset;
}
}
运行出现下面错误:
Exception in thread "main"java.io.FileNotFoundException:D:fruit.jpg<文件名、目录名或卷标语法不正确>
at java.io.FileOutputStream.open<Native Method>
at java.io.FileOutputStream.<init><FileOutputStream.java:179>
at java.io.FileOutputStream.<init><FileOutputStream.java:70>
at JFreeBarChartDemo.main< JFreeBarChartDemo.java:46>
改为fos_jpg = new FileOutputStream("D:\\fruit.jpg");
或者fos_jpg = new FileOutputStream("D:/fruit.jpg");
字符串里面单独1个\会作转义字符的