jfreechart-1.0.13报表通过JSP页面来显示
工作中经常遇到图形报表的问题.今天总结一下.jfreechart是一款免费开源的图形报表开发.但他的DEMO源代码和文档是收费的。所以今天把用jad反编译的代码也传上了上来与大家共享.
jfreechart可以实现各种报表,可以在应用程序中实现，也可以以web形式实现.所以代码都是通用的.demo中的代码是桌面应用程序的，所以此处不示范.web形式的代码如下.
在你的WEB工程里,导入以下"试验包"中的jar文件，直接复制代码就行了.我的环境是
tomcat6.0.28
jdk6.0.21
附件中还包含了jfreechart的其他几个官方下载的相关资料,读者们自己研究.有问题可以给我留言,我会尽快给大家回复.希望对大家能有帮助.^-^
<%@ page language="java" contentType="text/html; charset=utf-8" pageEncoding="utf-8"import="org.jfree.chart.*"import="org.jfree.chart.labels.*"import="org.jfree.chart.plot.*"import="org.jfree.chart.renderer.category.*"import="org.jfree.data.category.*"import="org.jfree.data.general.*" import="java.io.*"import="org.jfree.chart.axis.*" %><!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"><title>Insert title here</title></head><body><%DefaultCategoryDataset defaultcategorydataset = new DefaultCategoryDataset();String s = "First";String s1 = "Second";String s2 = "Third";String s3 = "Category 1";String s4 = "Category 2";String s5 = "Category 3";String s6 = "Category 4";String s7 = "Category 5"; defaultcategorydataset.addValue(1.0D, s, s3); defaultcategorydataset.addValue(4D, s, s4); defaultcategorydataset.addValue(3D, s, s5); defaultcategorydataset.addValue(5D, s, s6); defaultcategorydataset.addValue(5D, s, s7); defaultcategorydataset.addValue(5D, s1, s3); defaultcategorydataset.addValue(7D, s1, s4); defaultcategorydataset.addValue(6D, s1, s5); defaultcategorydataset.addValue(8D, s1, s6); defaultcategorydataset.addValue(4D, s1, s7); defaultcategorydataset.addValue(4D, s2, s3); defaultcategorydataset.addValue(3D, s2, s4); defaultcategorydataset.addValue(2D, s2, s5); defaultcategorydataset.addValue(3D, s2, s6); defaultcategorydataset.addValue(6D, s2, s7); JFreeChart jfreechart = ChartFactory.createBarChart("Bar Chart Demo 8", "Category", "Value", defaultcategorydataset, PlotOrientation.VERTICAL, false, true, false); CategoryPlot categoryplot = (CategoryPlot)jfreechart.getPlot(); NumberAxis numberaxis = (NumberAxis)categoryplot.getRangeAxis(); numberaxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits()); numberaxis.setUpperMargin(0.14999999999999999D); CategoryItemRenderer categoryitemrenderer = categoryplot.getRenderer(); categoryitemrenderer.setBaseItemLabelGenerator(new StandardCategoryItemLabelGenerator()); categoryitemrenderer.setSeriesItemLabelsVisible(0, Boolean.TRUE); CategoryAxis categoryaxis = categoryplot.getDomainAxis(); categoryaxis.setCategoryLabelPositions(CategoryLabelPositions.UP_45); OutputStream os = response.getOutputStream();ChartUtilities.writeChartAsPNG(os,jfreechart, 600, 500, true, 10);os.flush();os.close();os=null;response.flushBuffer();out.clear();out = pageContext.pushBody();%></body></html> 1 楼 zhoulenihao 2011-10-12 谢谢您的资料 2 楼 ehang_neu 2012-04-01 谢谢你的资料