我用jfreechart生成柱状图，在柱的顶端显示数值，怎么会显示竖起呢？比如123.就显示成
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怎么样调成正常显示啊？
------解决方案--------------------------------------------------------
public class JFreeCharTest1 {
/**
* @param args
*/
public static CategoryDataset CreateCategory(){
DefaultCategoryDataset cds=new DefaultCategoryDataset();
cds.setValue(10,"开发人员","beyondsoft");
cds.setValue(18,"初级开发人员","beyondsoft");
cds.setValue(22,"高级开发人员","beyondsoft");
cds.setValue(26,"测试人员","hisoft");
cds.setValue(33,"黑盒测试人员","hisoft");
cds.setValue(44,"白盒测试人员","hisoft");
return cds;
}
public static JFreeChart getfreechart(){
JFreeChart chart=ChartFactory.createBarChart("IT市场形式分析","公司名","人数",CreateCategory(), PlotOrientation.VERTICAL, true, true, true);
CategoryPlot categoryplot = (CategoryPlot) chart.getPlot();
// 设置图表的纵轴和横轴org.jfree.chart.axis.CategoryAxis
NumberAxis numberaxis = (NumberAxis) categoryplot.getRangeAxis();
CategoryAxis domainAxis = categoryplot.getDomainAxis();
TextTitle textTitle = chart.getTitle();
textTitle.setFont(new Font("黑体", Font.PLAIN, 20));
domainAxis.setTickLabelFont(new Font("sans-serif", Font.PLAIN, 11));
domainAxis.setLabelFont(new Font("宋体", Font.PLAIN, 12));
numberaxis.setTickLabelFont(new Font("sans-serif", Font.PLAIN, 12));
numberaxis.setLabelFont(new Font("黑体", Font.PLAIN, 12));
chart.getLegend().setItemFont(new Font("宋体", Font.PLAIN, 12));
return chart;
}
public static void main(String[] args) {
ChartFrame frame=new ChartFrame("IT市场形式分析",getfreechart());
frame.pack();
frame.setVisible(true);
}
}
参考下吧。
------解决方案--------------------------------------------------------
- Java code
JFreeChart chart = ChartFactory.createBarChart("企业风险度等级统计图", // 图表标题 "企业风险度等级", // 目录轴的显示标签 "企业风险度等级个数", // 数值轴的显示标签 getPillarDateSet(riskLevelList, sum), // 数据 // PlotOrientation.HORIZONTAL, //图表方向水平 PlotOrientation.VERTICAL, // 图表方向垂直 true, // 是否显示图例 false, // 是否显示工具提示 false // 是否生成URL ); // 设置标题及标题字体 chart.setTitle(new TextTitle("企业风险度等级统计图", new Font("宋体", Font.BOLD, 18))); //设置图例文字 chart.getLegend().setItemFont(new Font("宋体", Font.BOLD, 12)); // 获取柱状图plot对象 CategoryPlot plot = (CategoryPlot) chart.getPlot(); // 设置柱型的颜色 plot.getRenderer().setSeriesPaint(0, Color.blue); plot.setNoDataMessage("抱歉，没有查到相关的数据..."); // 取得横轴 CategoryAxis categoryAxis = plot.getDomainAxis(); // 设置横轴的字体 categoryAxis.setLabelFont(new Font("sans-serif", Font.BOLD, 18)); // 设置分类标签以45度倾斜 // categoryAxis.setCategoryLabelPositions(CategoryLabelPositions.UP_45); // 设置分类标签字体 categoryAxis.setTickLabelFont(new Font("sans-serif", Font.PLAIN, 15)); // 取得纵轴 NumberAxis numberAxis = (NumberAxis) plot.getRangeAxis(); // 设置纵轴的字体 numberAxis.setLabelFont(new Font("宋体", Font.BOLD, 18)); BarRenderer3D renderer = new BarRenderer3D(); // 显示每个柱的数值，并修改该数值的字体属性 renderer.setBaseItemLabelGenerator(new StandardCategoryItemLabelGenerator()); renderer.setBaseItemLabelsVisible(true); renderer.setBasePositiveItemLabelPosition(new ItemLabelPosition( ItemLabelAnchor.OUTSIDE12, TextAnchor.BASELINE_LEFT)); renderer.setItemLabelAnchorOffset(10D); //renderer.setBaseOutlinePaint(Color.BLACK); // 设置wall的颜色 for (int i = 0; i < riskLevelList.size(); i++) { RiskLevel risk = riskLevelList.get(i); String color[] = risk.getColor().split(","); renderer.setSeriesPaint( i, new Color(Integer.parseInt(color[0]), Integer .parseInt(color[1]), Integer.parseInt(color[2]))); } // 设置每种风险的平行柱的之间距离 renderer.setItemMargin(0.1); // 显示每个柱的数值，并修改该数值的字体属性 plot.setRenderer(renderer); // 设置背景透明度（0~1） plot.setBackgroundAlpha(0.9f); ChartRenderingInfo info = new ChartRenderingInfo( new StandardEntityCollection()); String filename = ServletUtilities.saveChartAsPNG(chart, 700, 650, info, request.getSession()); mapMessage = ChartUtilities.getImageMap("map0", info); src = request.getContextPath() + "/servlet/DisplayChart?filename=" + filename;