plot.setDataset(1, lineDataset);

DefaultCategoryDataset barDataset = new DefaultCategoryDataset();

barDataset.addValue(1.0, barSeries1, category1);
barDataset.addValue(4.0, barSeries1, category2);
barDataset.addValue(3.0, barSeries1, category3);
barDataset.addValue(5.0, barSeries1, category4);
 
CategoryPlot plot = chart.getCategoryPlot();
plot.setDataset(2, barDataset);
plot.mapDatasetToRangeAxis(1, 1);
plot.setRangeAxis(2, domainAxis);

------解决方案--------------------

探讨


大侠一看你的回答就是高手 能不能留下QQ  我们交流下


------解决方案--------------------

对于JfreeChart，是在CategoryAxis类中绘制的X轴，如果想改变X轴的绘制坐标，可以继承CategoryAxis类，重写其getCategoryStart()方法，然后再用你继承的CategoryAxis类来绘制X轴

我的邮箱：joy@mgsei.com（看不到你的图）

------解决方案--------------------

Java code

package com.article.action;

import java.awt.Font;
import java.util.List;

import org.jfree.chart.ChartFactory;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.CategoryAxis;
import org.jfree.chart.axis.CategoryLabelPositions;
import org.jfree.chart.axis.NumberAxis;
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;

import com.article.service.ArticleService;
import com.opensymphony.xwork2.ActionSupport;

public class BarChart3DAction extends ActionSupport{
    private ArticleService as;
    private JFreeChart chart; 
    public JFreeChart getChart(){ 
        chart = ChartFactory.createBarChart3D( 
                            "文章发布数量统计图", // 图表标题 
                            "月份", // 目录轴的显示标签 
                            "数量", // 数值轴的显示标签 
                            getDataSet(), // 数据集 
                            //PlotOrientation.HORIZONTAL , // 图表方向：水平 
                            PlotOrientation.VERTICAL , // 图表方向：垂直 
                            false,  // 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 
                            ); 
                             
        //重新设置图标标题，改变字体 
        chart.setTitle(new TextTitle("文章发布数量统计图", new Font("黑体", Font.ITALIC , 22)));  
        CategoryPlot plot = (CategoryPlot)chart.getPlot(); 
        //取得横轴 
        CategoryAxis categoryAxis = plot.getDomainAxis(); 
        //设置横轴显示标签的字体 
        categoryAxis.setLabelFont(new Font("宋体" , Font.BOLD , 22)); 
        //分类标签以45度角倾斜 
        categoryAxis.setCategoryLabelPositions(CategoryLabelPositions.UP_45); 
        categoryAxis.setTickLabelFont(new Font("宋体" , Font.BOLD , 18)); 
        //取得纵轴 
        NumberAxis numberAxis = (NumberAxis)plot.getRangeAxis(); 
        //设置纵轴显示标签的字体 
        numberAxis.setLabelFont(new Font("宋体" , Font.BOLD , 22));

        return chart; 
    } 
    //返回一个CategoryDataset实例 
    private  CategoryDataset getDataSet() 
    { 
        DefaultCategoryDataset dataset = new DefaultCategoryDataset(); 
       List list= as.BarChart3D();
       for (int i = 0; i < list.size(); i++) {   
            Object[] row = (Object[]) list.get(i);   
            Integer month = (Integer) row[0];   
                Integer shuliang = (Integer) row[1];  
                dataset.addValue(shuliang , ""