Jfreechart 0.9.11柱状图，当只有一个柱子的时候

Question

楼主，看看下面这些文章，是否对你有帮助？
http://www.csdn.net/develop/article/23/23291.shtm
http://tech.ccidnet.com/pub/article/c1077_a71701_p1.html
http://www-900.ibm.com/developerWorks/cn/java/l-jfreechart/

Answer 1

对jfreechart进行一些属性的配置，仔细看一下javadoc
类似这种，看了javadoc你就明白了。http://www-900.ibm.com/developerWorks/cn/java/l-jfreechart/文章很好//  Create the chart object
        CategoryAxis categoryAxis = new CategoryAxis("");
        ValueAxis valueAxis = new NumberAxis("");
        BarRenderer renderer = new BarRenderer();
        renderer.setItemURLGenerator(new StandardCategoryURLGenerator("xy_chart.jsp","series","section"));
        renderer.setItemLabelGenerator(new StandardCategoryItemLabelGenerator());        Plot plot = new CategoryPlot(dataset, categoryAxis, valueAxis, renderer);
        JFreeChart chart = new JFreeChart("", JFreeChart.DEFAULT_TITLE_FONT, plot, false);
        chart.setBackgroundPaint(java.awt.Color.white);        //  Write the chart image to the temporary directory
        ChartRenderingInfo info = new ChartRenderingInfo(new StandardEntityCollection());
        filename = ServletUtilities.saveChartAsPNG(chart, 500, 300, info, session);        //  Write the image map to the PrintWriter
        ChartUtilities.writeImageMap(pw, filename, info);
        pw.flush();我很穷，给点分分吧。