JFreeChart 实现无乱码的柱状图和饼状图实例

package test; import java.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.ValueAxis; import org.jfree.chart.plot.CategoryPlot; import org.jfree.chart.plot.PlotOrientation; import org.jfree.chart.title.TextTitle; import org.jfree.data.category.CategoryDataset; import org.jfree.data.category.DefaultCategoryDataset; /** * 该类用于演示最简单的柱状图生成 * @author Winter Lau */ public class BarChartDemo { public static void main(String[] args) throws IOException{ CategoryDataset dataset = getDataSet2(); 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 ); CategoryPlot plot=chart.getCategoryPlot();//获取图表区域对象 //设置标题文字 TextTitle text=chart.getTitle(); text.setFont(new Font("黑体",Font.BOLD,14)); 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("宋体",Font.BOLD,12)); //垂直标题 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)); FileOutputStream fos_jpg = null; try { fos_jpg = new FileOutputStream("D://fruit.jpg"); ChartUtilities.writeChartAsJPEG(fos_jpg,1.0f,chart,400,300,null); } finally { try { fos_jpg.close(); } catch (Exception e) {} } } /** * 获取一个演示用的简单数据集对象 * @return */ 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; } /** * 获取一个演示用的组合数据集对象 * @return */ 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; } }