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利用JFreeChart生成简单柱状图(Java)

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08/02
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package barchartdemo1; import <a href="http://lib.csdn.net/base/javaee" class='replace_word' title="Java EE知识库" target='_blank' style='color:#df3434; font-weight:bold;'>Java</a>.awt.Font;
import java.io.FileOutputStream;
import java.io.IOException;
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.NumberAxis;
import org.jfree.chart.plot.CategoryPlot;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.data.category.CategoryDataset;
import org.jfree.data.category.DefaultCategoryDataset; /**
*
* @author Administrator
*/
public class Main { /**
* @param args the command line arguments
*/
public static void main(String[] args) throws IOException {
CategoryDataset ds = getDataSet();
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
ds, //数据集
PlotOrientation.VERTICAL, //图表方向
true, //是否显示图例，对于简单的柱状图必须为false
false, //是否生成提示工具
false); //是否生成url链接 CategoryPlot categoryplot = (CategoryPlot) chart.getPlot(); NumberAxis numberaxis = (NumberAxis) categoryplot.getRangeAxis(); CategoryAxis domainAxis = categoryplot.getDomainAxis(); /*------设置X轴坐标上的文字-----------*/
domainAxis.setTickLabelFont(new Font("sans-serif", Font.PLAIN, 11)); /*------设置X轴的标题文字------------*/
domainAxis.setLabelFont(new Font("宋体", Font.PLAIN, 12)); /*------设置Y轴坐标上的文字-----------*/
numberaxis.setTickLabelFont(new Font("sans-serif", Font.PLAIN, 12)); /*------设置Y轴的标题文字------------*/
numberaxis.setLabelFont(new Font("黑体", Font.PLAIN, 12)); /*------这句代码解决了底部汉字乱码的问题-----------*/
chart.getLegend().setItemFont(new Font("宋体", Font.PLAIN, 12)); /*******这句代码解决了标题汉字乱码的问题********/
chart.getTitle().setFont(new Font("宋体", Font.PLAIN, 12)); FileOutputStream out = null;
try {
out = new FileOutputStream("E://Items//BarChartDemo1//image//1.jpg");
ChartUtilities.writeChartAsJPEG(out, 0.5f, chart, 400, 300, null);
} finally {
try {
out.close();
} catch (Exception ex) {
ex.printStackTrace();
}
}
} private static CategoryDataset getDataSet() {
DefaultCategoryDataset ds = new DefaultCategoryDataset();
ds.addValue(100, "北京", "苹果");
ds.addValue(100, "上海", "苹果");
ds.addValue(100, "广州", "苹果");
ds.addValue(200, "北京", "梨子");
ds.addValue(200, "上海", "梨子");
ds.addValue(200, "广州", "梨子");
ds.addValue(300, "北京", "葡萄");
ds.addValue(300, "上海", "葡萄");
ds.addValue(300, "广州", "葡萄");
ds.addValue(400, "北京", "橘子");
ds.addValue(400, "上海", "橘子");
ds.addValue(400, "广州", "橘子");
ds.addValue(500, "北京", "香蕉");
ds.addValue(500, "上海", "香蕉");
ds.addValue(500, "广州", "香蕉");
return ds;
}
}

package barchartdemo1; import <a href="http://lib.csdn.net/base/javaee" class='replace_word' title="Java EE知识库" target='_blank' style='color:#df3434; font-weight:bold;'>Java</a>.awt.Font;
import java.io.FileOutputStream;
import java.io.IOException;
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.NumberAxis;
import org.jfree.chart.plot.CategoryPlot;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.data.category.CategoryDataset;
import org.jfree.data.category.DefaultCategoryDataset; /**
*
* @author Administrator
*/
public class Main { /**
* @param args the command line arguments
*/
public static void main(String[] args) throws IOException {
CategoryDataset ds = getDataSet();
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
ds, //数据集
PlotOrientation.VERTICAL, //图表方向
true, //是否显示图例，对于简单的柱状图必须为false
false, //是否生成提示工具
false); //是否生成url链接 CategoryPlot categoryplot = (CategoryPlot) chart.getPlot(); NumberAxis numberaxis = (NumberAxis) categoryplot.getRangeAxis(); CategoryAxis domainAxis = categoryplot.getDomainAxis(); /*------设置X轴坐标上的文字-----------*/
domainAxis.setTickLabelFont(new Font("sans-serif", Font.PLAIN, 11)); /*------设置X轴的标题文字------------*/
domainAxis.setLabelFont(new Font("宋体", Font.PLAIN, 12)); /*------设置Y轴坐标上的文字-----------*/
numberaxis.setTickLabelFont(new Font("sans-serif", Font.PLAIN, 12)); /*------设置Y轴的标题文字------------*/
numberaxis.setLabelFont(new Font("黑体", Font.PLAIN, 12)); /*------这句代码解决了底部汉字乱码的问题-----------*/
chart.getLegend().setItemFont(new Font("宋体", Font.PLAIN, 12)); /*******这句代码解决了标题汉字乱码的问题********/
chart.getTitle().setFont(new Font("宋体", Font.PLAIN, 12)); FileOutputStream out = null;
try {
out = new FileOutputStream("E://Items//BarChartDemo1//image//1.jpg");
ChartUtilities.writeChartAsJPEG(out, 0.5f, chart, 400, 300, null);
} finally {
try {
out.close();
} catch (Exception ex) {
ex.printStackTrace();
}
}
} private static CategoryDataset getDataSet() {
DefaultCategoryDataset ds = new DefaultCategoryDataset();
ds.addValue(100, "北京", "苹果");
ds.addValue(100, "上海", "苹果");
ds.addValue(100, "广州", "苹果");
ds.addValue(200, "北京", "梨子");
ds.addValue(200, "上海", "梨子");
ds.addValue(200, "广州", "梨子");
ds.addValue(300, "北京", "葡萄");
ds.addValue(300, "上海", "葡萄");
ds.addValue(300, "广州", "葡萄");
ds.addValue(400, "北京", "橘子");
ds.addValue(400, "上海", "橘子");
ds.addValue(400, "广州", "橘子");
ds.addValue(500, "北京", "香蕉");
ds.addValue(500, "上海", "香蕉");
ds.addValue(500, "广州", "香蕉");
return ds;
}
}

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