动态 水晶报表

package ambow.ecport.utils;import java.io.IOException;import java.util.ArrayList;import java.util.HashMap;import java.util.Iterator;import java.util.List;import java.util.Map;import javax.servlet.ServletException;import javax.servlet.ServletRequest;import javax.servlet.ServletResponse;import javax.servlet.http.HttpServlet;import org.jfree.chart.ChartFactory;import org.jfree.chart.ChartUtilities;import org.jfree.chart.JFreeChart;import org.jfree.chart.plot.PlotOrientation;import org.jfree.data.category.CategoryDataset;import org.jfree.data.category.DefaultCategoryDataset;/** * 通过servlet直接输出图表 * * @author 1e+10 */@SuppressWarnings("serial")public class PieCharServlet extends HttpServlet {public void service(ServletRequest req, ServletResponse res)throws ServletException, IOException {res.setContentType("image/jpeg");CategoryDataset dataset = getDataSet2();JFreeChart chart = ChartFactory.createBarChart3D("书销售量", // 图表标题"类别", // 目录轴的显示标签"书", // 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);ChartUtilities.writeChartAsJPEG(res.getOutputStream(), 1.0f, chart,800, 600, null);}/** * 获取一个演示用的组合数据集对象 * * @return */@SuppressWarnings("unchecked")private static CategoryDataset getDataSet2() {DefaultCategoryDataset dataset = new DefaultCategoryDataset();List list = new ArrayList();list.add("java类");list.add("c语言类");list.add("c#类");list.add("普通类");list.add("小说");list.add("ttttt");list.add("ccccc");list.add("qqqqq");List list1 = new ArrayList();list1.add("北京");list1.add("上海");list1.add("广东");list1.add("江苏");list1.add("湖南");List list2 = new ArrayList();list2.add(100);list2.add(200);list2.add(300);list2.add(400);list2.add(500);list2.add(600);list2.add(700);list2.add(800);//Object[][] a = { { 100, "java类" }, { 200, "c语言类" }, { 400, "小说" } };Map<Integer, String> map = new HashMap<Integer, String>();map.put(100, "java类");map.put(200, "c语言类");map.put(400, "小说");Map<Integer, String> map1 = new HashMap<Integer, String>();map1.put(100, "北京");map1.put(200, "上海");map1.put(400, "广东");for (Iterator iter = map.entrySet().iterator(); iter.hasNext();) {Map.Entry<Integer, String> e = (Map.Entry<Integer, String>) iter.next();for (Iterator iter1 = map1.entrySet().iterator(); iter1.hasNext();) {Map.Entry<Integer, String> c = (Map.Entry<Integer, String>) iter1.next();dataset.addValue(c.getKey(), c.getValue(), e.getValue());}}/* * for(int i = 0; i < a.length; i++) { for(int j = 0; j < a[i].length; * j++) { dataset.addValue(a[i], "上海", a[i][j]); } } *//* * for (Iterator iter = list.iterator(); iter.hasNext();) { String name = * (String)iter.next(); //dataset.addValue(0, null, name); for(Iterator * iter1 = list1.iterator(); iter1.hasNext();) { String chengshi = * (String)iter1.next(); //dataset.addValue(0, chengshi, null); * for(Iterator iter2 = list2.iterator(); iter2.hasNext();) { int tt = * (Integer)iter2.next(); dataset.addValue(tt, chengshi, name); } * for(Iterator iter2 = list2.iterator(); iter2.hasNext();) { int tt = * (Integer)iter2.next(); dataset.addValue(tt, "上海", name); } * //dataset.addValue(200, "上海", name); } dataset.addValue(200, "北京", * (String)list.get(1)); dataset.addValue(200, "上海", * (String)list.get(1)); dataset.addValue(200, "广州", * (String)list.get(1)); dataset.addValue(300, "北京", * (String)list.get(2)); dataset.addValue(300, "上海", * (String)list.get(2)); dataset.addValue(300, "广州", * (String)list.get(2)); dataset.addValue(400, "北京", * (String)list.get(3)); dataset.addValue(400, "上海", * (String)list.get(3)); dataset.addValue(400, "广州", * (String)list.get(3)); dataset.addValue(500, "北京", * (String)list.get(4)); dataset.addValue(500, "上海", * (String)list.get(4)); dataset.addValue(500, "广州", * (String)list.get(4)); dataset.addValue(500, "北京", * (String)list.get(5)); dataset.addValue(500, "上海", * (String)list.get(5)); dataset.addValue(500, "广州", * (String)list.get(5)); } */return dataset;}}

 

花了一点时间把从jfreeChart上API中的静态的报表改成了动态的，不用在手动的传东西上去了，

只要得到两个Map就行。

 

效果：