有关jfreechar???? 请举一个例子用jfreechar画一个曲线图 解决方案 » 免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货 index.jsp<%@ page contentType="text/html;charset=GBK"%><%@ page import="org.jfree.data.general.DefaultPieDataset"%><%@ page import="org.jfree.chart.*"%><%@ page import="org.jfree.chart.plot.*"%><%@ page import="org.jfree.chart.servlet.ServletUtilities"%><%@ page import="org.jfree.chart.labels.StandardPieItemLabelGenerator"%><%@ page import="org.jfree.chart.urls.StandardPieURLGenerator"%><%@ page import="org.jfree.chart.entity.StandardEntityCollection"%><%@ page import="java.io.*"%><HTML><HEAD><META http-equiv=Content-Type content="text/html; charset=GBK"><TITLE>[email protected]</TITLE></HEAD><BODY><%DefaultPieDataset data = new DefaultPieDataset();data.setValue("高中以下",370);data.setValue("高中",1530);data.setValue("大专",5700);data.setValue("本科",8280);data.setValue("硕士",4420);data.setValue("博士",80);PiePlot3D plot = new PiePlot3D(data);//3D饼图plot.setURLGenerator(new StandardPieURLGenerator("barview.jsp"));//设定链接JFreeChart chart = new JFreeChart("",JFreeChart.DEFAULT_TITLE_FONT, plot, true);chart.setBackgroundPaint(java.awt.Color.white);//可选,设置图片背景色chart.setTitle("程序员学历情况调查表");//可选,设置图片标题plot.setToolTipGenerator(new StandardPieItemLabelGenerator());StandardEntityCollection sec = new StandardEntityCollection();ChartRenderingInfo info = new ChartRenderingInfo(sec);PrintWriter w = new PrintWriter(out);//输出MAP信息//500是图片长度,300是图片高度String filename = ServletUtilities.saveChartAsPNG(chart, 500, 300, info, session);out.print("图片读写完毕");ChartUtilities.writeImageMap(w, "map0", info, false);String graphURL = request.getContextPath() + "/servlet/DisplayChart?filename=" + filename;%><P ALIGN="CENTER"><img src="<%= graphURL %>" width=500 height=300 border=0 usemap="#map0" alt=""></P></BODY></HTML>//=========================================barview.jsp<HTML><HEAD><META http-equiv=Content-Type content="text/html; charset=GBK"><TITLE>[email protected]</TITLE></HEAD><body><%@ page contentType="text/html;charset=GBK"%><%@ page import="org.jfree.chart.ChartFactory,org.jfree.chart.JFreeChart,org.jfree.chart.plot.PlotOrientation,org.jfree.chart.servlet.ServletUtilities,org.jfree.data.category.*"%><%CategoryDataset dataset;String category=request.getParameter("category");category= new String(category.getBytes("ISO8859_1"), "GBK");if(category.equals("本科")||category.equals("高中")||category.equals("大专")){dataset=getDataSet();}else if(category.equals("硕士")||category.equals("博士")){dataset=getDataSet2();}else{dataset=getDataSet3();}String title=category+"程序员在各城市薪金情况统计";JFreeChart chart = ChartFactory.createBarChart3D(title,"城市","薪金",dataset,PlotOrientation.VERTICAL,true,false,false);String filename = ServletUtilities.saveChartAsPNG(chart, 500, 300, null, session);String graphURL = request.getContextPath() + "/servlet/DisplayChart?filename=" + filename;%><P ALIGN="CENTER"><img src="<%= graphURL %>" width=500 height=300 border=0 usemap="#<%= filename %>"></P><%!private static CategoryDataset getDataSet() {DefaultCategoryDataset dataset = new DefaultCategoryDataset();dataset.addValue(2000, "北京", "VB");dataset.addValue(1800, "上海", "VB");dataset.addValue(2200, "广州", "VB");dataset.addValue(3200, "北京", "JAVA");dataset.addValue(3500, "上海", "JAVA");dataset.addValue(3600, "广州", "JAVA");dataset.addValue(3300, "北京", "DOT NET");dataset.addValue(3400, "上海", "DOT NET");dataset.addValue(3700, "广州", "DOT NET");dataset.addValue(2500, "北京", "DELPHI");dataset.addValue(2800, "上海", "DELPHI");dataset.addValue(3200, "广州", "DELPHI");dataset.addValue(5000, "北京", "VC");dataset.addValue(3500, "上海", "VC");dataset.addValue(4600, "广州", "VC");return dataset;}private static CategoryDataset getDataSet2() {DefaultCategoryDataset dataset = new DefaultCategoryDataset();dataset.addValue(2000, "上海", "VB");dataset.addValue(3000, "北京", "JAVA");dataset.addValue(3330, "上海", "JAVA");dataset.addValue(3500, "广州", "JAVA");dataset.addValue(3500, "北京", "DOT NET");dataset.addValue(4000, "上海", "DOT NET");dataset.addValue(4800, "广州", "DOT NET");dataset.addValue(2600, "北京", "DELPHI");dataset.addValue(2200, "上海", "DELPHI");dataset.addValue(4000, "北京", "VC");dataset.addValue(4000, "上海", "VC");dataset.addValue(4200, "广州", "VC");return dataset;}private static CategoryDataset getDataSet3() {DefaultCategoryDataset dataset = new DefaultCategoryDataset();dataset.addValue(2100, "北京", "VB");dataset.addValue(2200, "上海", "VB");dataset.addValue(2100, "广州", "VB");dataset.addValue(3000, "北京", "JAVA");dataset.addValue(3200, "上海", "JAVA");dataset.addValue(3600, "广州", "JAVA");dataset.addValue(4100, "北京", "DOT NET");dataset.addValue(4200, "上海", "DOT NET");dataset.addValue(4160, "广州", "DOT NET");dataset.addValue(2400, "北京", "DELPHI");dataset.addValue(2600, "上海", "DELPHI");dataset.addValue(2500, "广州", "DELPHI");dataset.addValue(5400, "北京", "VC");dataset.addValue(5000, "上海", "VC");dataset.addValue(5500, "广州", "VC");return dataset;}%></body></html>//=======================web.xml<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" "http://java.sun.com/dtd/web-app_2_3.dtd"><web-app> <display-name>web</display-name> <servlet> <servlet-name>DisplayChart</servlet-name> <servlet-class>org.jfree.chart.servlet.DisplayChart</servlet-class> </servlet> <servlet-mapping> <servlet-name>DisplayChart</servlet-name> <url-pattern>/servlet/DisplayChart</url-pattern> </servlet-mapping></web-app> 看看这段代码的结果 帮匹配一个简单的字符串? ajax实现google suggest例子 新手提问,高手帮我看看这个程序 求助~~~~~ 组件和容器的区别是什么? ???如何在Java 中自定义一个事件??? 毕业设计现求一个关于JSP编写的网上拍卖系统的程序。。希望好心人帮帮忙。。必当重谢 大家都用什么工具做界面?现在需要用awt做一个界面,我用jdk快累死了,做得也不好看!郁闷... 请教大侠索引程序 Java中有什么方法获取Applet小程序窗口的高和宽 菜鸟求助
<%@ page import="org.jfree.data.general.DefaultPieDataset"%>
<%@ page import="org.jfree.chart.*"%>
<%@ page import="org.jfree.chart.plot.*"%>
<%@ page import="org.jfree.chart.servlet.ServletUtilities"%>
<%@ page import="org.jfree.chart.labels.StandardPieItemLabelGenerator"%>
<%@ page import="org.jfree.chart.urls.StandardPieURLGenerator"%>
<%@ page import="org.jfree.chart.entity.StandardEntityCollection"%>
<%@ page import="java.io.*"%>
<HTML>
<HEAD>
<META http-equiv=Content-Type content="text/html; charset=GBK">
<TITLE>[email protected]</TITLE>
</HEAD>
<BODY>
<%DefaultPieDataset data = new DefaultPieDataset();
data.setValue("高中以下",370);
data.setValue("高中",1530);
data.setValue("大专",5700);
data.setValue("本科",8280);
data.setValue("硕士",4420);
data.setValue("博士",80);PiePlot3D plot = new PiePlot3D(data);//3D饼图
plot.setURLGenerator(new StandardPieURLGenerator("barview.jsp"));//设定链接
JFreeChart chart = new JFreeChart("",JFreeChart.DEFAULT_TITLE_FONT, plot, true);
chart.setBackgroundPaint(java.awt.Color.white);//可选,设置图片背景色
chart.setTitle("程序员学历情况调查表");//可选,设置图片标题
plot.setToolTipGenerator(new StandardPieItemLabelGenerator());
StandardEntityCollection sec = new StandardEntityCollection();
ChartRenderingInfo info = new ChartRenderingInfo(sec);
PrintWriter w = new PrintWriter(out);//输出MAP信息
//500是图片长度,300是图片高度
String filename = ServletUtilities.saveChartAsPNG(chart, 500, 300, info, session);
out.print("图片读写完毕");
ChartUtilities.writeImageMap(w, "map0", info, false);String graphURL = request.getContextPath() + "/servlet/DisplayChart?filename=" + filename;%><P ALIGN="CENTER">
<img src="<%= graphURL %>" width=500 height=300 border=0 usemap="#map0" alt="">
</P>
</BODY>
</HTML>
//=========================================
barview.jsp
<HTML>
<HEAD>
<META http-equiv=Content-Type content="text/html; charset=GBK">
<TITLE>[email protected]</TITLE>
</HEAD><body><%@ page contentType="text/html;charset=GBK"%>
<%@ page import="org.jfree.chart.ChartFactory,
org.jfree.chart.JFreeChart,
org.jfree.chart.plot.PlotOrientation,
org.jfree.chart.servlet.ServletUtilities,
org.jfree.data.category.*"%>
<%
CategoryDataset dataset;
String category=request.getParameter("category");
category= new String(category.getBytes("ISO8859_1"), "GBK");
if(category.equals("本科")||category.equals("高中")||category.equals("大专"))
{
dataset=getDataSet();
}
else if(category.equals("硕士")||category.equals("博士"))
{
dataset=getDataSet2();
}else
{
dataset=getDataSet3();
}
String title=category+"程序员在各城市薪金情况统计";
JFreeChart chart = ChartFactory.createBarChart3D(title,
"城市",
"薪金",
dataset,
PlotOrientation.VERTICAL,
true,
false,
false);String filename = ServletUtilities.saveChartAsPNG(chart, 500, 300, null, session);
String graphURL = request.getContextPath() + "/servlet/DisplayChart?filename=" + filename;
%>
<P ALIGN="CENTER">
<img src="<%= graphURL %>" width=500 height=300 border=0 usemap="#<%= filename %>">
</P>
<%!
private static CategoryDataset getDataSet() {
DefaultCategoryDataset dataset = new DefaultCategoryDataset();
dataset.addValue(2000, "北京", "VB");
dataset.addValue(1800, "上海", "VB");
dataset.addValue(2200, "广州", "VB");
dataset.addValue(3200, "北京", "JAVA");
dataset.addValue(3500, "上海", "JAVA");
dataset.addValue(3600, "广州", "JAVA");
dataset.addValue(3300, "北京", "DOT NET");
dataset.addValue(3400, "上海", "DOT NET");
dataset.addValue(3700, "广州", "DOT NET");
dataset.addValue(2500, "北京", "DELPHI");
dataset.addValue(2800, "上海", "DELPHI");
dataset.addValue(3200, "广州", "DELPHI");
dataset.addValue(5000, "北京", "VC");
dataset.addValue(3500, "上海", "VC");
dataset.addValue(4600, "广州", "VC");
return dataset;
}
private static CategoryDataset getDataSet2() {
DefaultCategoryDataset dataset = new DefaultCategoryDataset();
dataset.addValue(2000, "上海", "VB");
dataset.addValue(3000, "北京", "JAVA");
dataset.addValue(3330, "上海", "JAVA");
dataset.addValue(3500, "广州", "JAVA");
dataset.addValue(3500, "北京", "DOT NET");
dataset.addValue(4000, "上海", "DOT NET");
dataset.addValue(4800, "广州", "DOT NET");
dataset.addValue(2600, "北京", "DELPHI");
dataset.addValue(2200, "上海", "DELPHI");
dataset.addValue(4000, "北京", "VC");
dataset.addValue(4000, "上海", "VC");
dataset.addValue(4200, "广州", "VC");
return dataset;
}
private static CategoryDataset getDataSet3() {
DefaultCategoryDataset dataset = new DefaultCategoryDataset();
dataset.addValue(2100, "北京", "VB");
dataset.addValue(2200, "上海", "VB");
dataset.addValue(2100, "广州", "VB");
dataset.addValue(3000, "北京", "JAVA");
dataset.addValue(3200, "上海", "JAVA");
dataset.addValue(3600, "广州", "JAVA");
dataset.addValue(4100, "北京", "DOT NET");
dataset.addValue(4200, "上海", "DOT NET");
dataset.addValue(4160, "广州", "DOT NET");
dataset.addValue(2400, "北京", "DELPHI");
dataset.addValue(2600, "上海", "DELPHI");
dataset.addValue(2500, "广州", "DELPHI");
dataset.addValue(5400, "北京", "VC");
dataset.addValue(5000, "上海", "VC");
dataset.addValue(5500, "广州", "VC");
return dataset;
}
%>
</body>
</html>//=======================
web.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" "http://java.sun.com/dtd/web-app_2_3.dtd"><web-app>
<display-name>web</display-name>
<servlet>
<servlet-name>DisplayChart</servlet-name>
<servlet-class>org.jfree.chart.servlet.DisplayChart</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>DisplayChart</servlet-name>
<url-pattern>/servlet/DisplayChart</url-pattern>
</servlet-mapping>
</web-app>