JFreeChart项目实例

最近利用JFreeChart和MySQL数据库做了一个JSP网页，展现Android Martet全球12个国家的TOP800游戏排名的曲线走势
准备知识，请先阅读我先前写的博客

JFreeChart学习示例
需导入jar包如下：
完整代码：
<%@ page language="java" contentType="text/html" pageEncoding="utf-8" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"  "http://www.w3.org/TR/html4/loose.dtd">
 
 <%@ page language="java" import="java.sql.*" %>
 <%@ page language="java" import="java.io.*" %>
 
 <%@ page language="java" import="java.io.*" %>
 <%@ page language="java" import="java.awt.*" %>
 <%@ page language="java" import="org.jfree.data.*" %>
 <%@ page language="java" import="org.jfree.data.category.*" %>
 <%@ page language="java" import="org.jfree.data.general.*" %>
 <%@ page language="java" import="org.jfree.chart.*" %>
 <%@ page language="java" import="org.jfree.chart.entity.*" %>
 <%@ page language="java" import="org.jfree.chart.plot.*" %>
 

<%
 	// GLOBLE PARAMS
 	// MySQL 连接JDBC
 	String MYSQL_DRIVER = "com.mysql.jdbc.Driver";
 	String MYSQL_URL = "jdbc:mysql://localhost:3306/top800";

 	// 数据库查询语句
 	String chartTitle = "GameName of Country";
 	String sql = "select * from (select name, id, dtime, top, country, category, rating, ratingcount, download, price, version, filesize, requireandroid, url from gametop800 where name like \"%3D Bowling%\" and country = \"usa\" order by dtime desc limit 0, 2147483647) as tbl order by dtime asc";
 %>



<%@page import="org.jfree.chart.plot.PlotOrientation"%>
<%@page import="java.util.Date"%>
<%@page import="org.jfree.chart.servlet.ServletUtilities"%>
<%@page import="org.jfree.chart.axis.NumberAxis"%>
<%@page import="org.jfree.chart.axis.CategoryAxis"%>
<%@page import="org.jfree.chart.axis.CategoryLabelPositions"%><html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Top800 Game Free Chart Line</title>
</head>

<body>
<center>
<form method="post">

<div style="margin: auto 30px; width: 1000px" >

	<select name="game_type">
		<option value="游戏名称">游戏名称</option>
		<option value="游戏包名">游戏包名</option>
	</select>：
	<input type="text" name="game_keyword" style="width:300px" />
	
	    
	所属国家：
	<select name="countryname"  style="width:100px">
		<option value="usa">usa</option>
		<option value="england">england</option>
		<option value="france">france</option>
		<option value="japan">japan</option>
		<option value="italy">italy</option>
		<option value="german">german</option>
		<option value="india">india</option>
		<option value="spain">spain</option>
		<option value="russia">russia</option>
		<option value="china">china</option>
		<option value="eu">eu</option>
	</select>
	
	    
	记录时间：
	<select name="game_dtime">
		<option value="全部">全部</option>
		<option value="最近一周">最近一周</option>
		<option value="最近一月">最近一月</option>
	</select>
	
	    
	<input type="submit" value="查询" style="width:60px">

</div>

	<hr style="width: 80%" />
	
	<%
			String game_type = new String("游戏名称");
			String game_keyword = "3D Bowling";
			String countryname = "usa";
			String game_dtime = new String("全部");

			request.setCharacterEncoding("utf-8");
			game_type    = request.getParameter("game_type");
			game_keyword = request.getParameter("game_keyword");
			countryname  = request.getParameter("countryname");
			game_dtime   = request.getParameter("game_dtime");

			int limitTop = Integer.MAX_VALUE;

			game_type = game_type == null ? game_type = "游戏名称" : game_type.trim();
			game_keyword = game_keyword == null ? game_keyword = "3D Bowling" : game_keyword.trim();
			countryname  = countryname  == null ? countryname  = "usa" : countryname.trim();
			game_dtime   = game_dtime   == null ? game_dtime   = "全部" : game_dtime.trim();

			if (game_dtime != null) {
				if (game_dtime.equals("全部")) {
					limitTop = Integer.MAX_VALUE;
				} else if (game_dtime.equals("最近一周")) {
					limitTop = 7;
				} else if (game_dtime.equals("最近一月")) {
					limitTop = 30;
				} else {
					limitTop = Integer.MAX_VALUE;
				}
			}

			if (game_keyword != null && game_keyword != "") {
				chartTitle = game_keyword + " of " + countryname;

				if (game_type.equals("游戏名称")) {
					sql = "select * from (select name, id, dtime, top, country, category, rating, ratingcount, download, price, version, filesize, requireandroid, url from gametop800 where name like \"%"
							+ game_keyword
							+ "%\" and country = \""
							+ countryname
							+ "\" order by dtime desc limit 0, "
							+ limitTop + ") as tbl order by dtime asc";

				} else if (game_type.equals("游戏包名")) {
					sql = "select * from (select name, id, dtime, top, country, category, rating, ratingcount, download, price, version, filesize, requireandroid, url from gametop800 where id = \""
							+ game_keyword
							+ "\" and country = \""
							+ countryname
							+ "\" order by dtime desc limit 0, "
							+ limitTop + ") as tbl order by dtime asc";

				} else {
					sql = "select * from (select name, id, dtime, top, country, category, rating, ratingcount, download, price, version, filesize, requireandroid, url from gametop800 where name like \"%"
							+ game_keyword
							+ "%\" and country = \""
							+ countryname
							+ "\" order by dtime desc limit 0, "
							+ limitTop + ") as tbl order by dtime asc";

				}
			} else {
				game_type = "游戏名称";
				game_keyword = "3D Bowling";
				countryname  = "usa";
				game_dtime   = "全部";
			}
		%>


	<table border="2" width="40%">
		<tr>
			<td valign="middle"><b><%=game_type%>：</b></td>
			<td><%=game_keyword%> </td>
		</tr>
		<tr>
			<td valign="middle"><b>所属国家：</b></td>
			<td><%=countryname%></td>
		</tr>
		<tr>
			<td valign="middle"><b>记录时间：</b></td>
			<td><%=game_dtime%></td>
		</tr>
	</table>
	
	
	<hr style="width: 80%" />
	
<%
		DefaultCategoryDataset dataset = new DefaultCategoryDataset();

		Connection conn = null;
		Statement stmt = null;
		ResultSet rs = null;

		try {
			// 连接 MySQL 数据库
			Class.forName(MYSQL_DRIVER).newInstance();
			conn = DriverManager.getConnection(MYSQL_URL, "root", "");
			stmt = conn.createStatement();
			rs = stmt.executeQuery(sql);

			// 遍历读取的数据集
			while (rs.next()) {
				String name = rs.getString(1);
				String dtime = rs.getString(3);
				int top = rs.getInt(4);

				if (name != null && dtime != null) {
					dataset.addValue(top, name, dtime);		// 构造JFreeChart的数据集dataset
				}
			}

		} catch (Exception e) {
			System.err.println(e.getMessage());

		}

		JFreeChart chart = ChartFactory.createLineChart(
				chartTitle, 	// 标题
				"记录时间", 		// 横轴名称
				"游戏排名", 		// 纵轴名称
				dataset,		// 数据集
				PlotOrientation.VERTICAL,	// 垂直视图 
				true, 
				true, 
				true
		);

		final CategoryPlot plot = (CategoryPlot) chart.getPlot();
		plot.setBackgroundPaint(Color.lightGray);	// 背景色
		plot.setRangeGridlinePaint(Color.blue);		// 横轴虚线
		plot.setRangeGridlinesVisible(true);		// 横轴虚线是否可见

		final NumberAxis rangeAxis = (NumberAxis) plot.getRangeAxis();
		rangeAxis.setAutoRangeMinimumSize(1);		// 距离为1
		rangeAxis.setAutoRangeIncludesZero(true);	// 从零计算
		rangeAxis.setInverted(true);				// 纵轴逆序（原点到顶端，是从大到小）

		final CategoryAxis categoryAxis = plot.getDomainAxis();
		if (limitTop == 7) {
			categoryAxis.setCategoryLabelPositions(CategoryLabelPositions.STANDARD);	// 横轴标准显示（水平）
		} else {
			categoryAxis.setCategoryLabelPositions(CategoryLabelPositions.UP_45);		// 横轴45度显示（倾斜）
		}

		FileOutputStream fos_jpg = null;
		String file_jpg = null;
		String url_jpg = null;

		try {
			final ChartRenderingInfo info = new ChartRenderingInfo(new StandardEntityCollection());

			file_jpg = ServletUtilities.saveChartAsJPEG(chart, 1200, 600, info, null);			// 生成图片
			url_jpg = request.getContextPath() + "/servlet/DisplayChart?filename=" + file_jpg;	// 图片路径

		} catch (Exception e) {
			out.println(e);
		} finally {
			try {
				fos_jpg.close();
			} catch (Exception e) {
				e.printStackTrace();
			}
		}
	%>
 
<img src=<%=url_jpg%>  border="1"  />	<!-- 显示图片（url_jpg为JFreeChart生成图片的路径） --> 

<hr style="width: 80%" />

<table border="2" borderColor="#00000" cellPadding="0" cellSpacing="0" width="auto" >
	<tbody>
		<tr>
			<td bgColor="#008080" height="28" align="center" valign="middle">
				<font color="#ffffff"><b>name</b></font></td>
			<td bgColor="#008080" height="28" align="center" valign="middle">
				<font color="#ffffff"><b>id</b></font></td>
			<td bgColor="#008080" height="28" align="center" valign="middle">
				<font color="#ffffff"><b>dtime</b></font></td>
			<td bgColor="#008080" height="28" align="center" valign="middle">
				<font color="#ffffff"><b>top</b></font></td>
			<td bgColor="#008080" height="28" align="center" valign="middle">
				<font color="#ffffff"><b>country</b></font></td>
			<td bgColor="#008080" height="28" align="center" valign="middle">
				<font color="#ffffff"><b>category</b></font></td>
			<td bgColor="#008080" height="28" align="center" valign="middle">
				<font color="#ffffff"><b>rating</b></font></td>
			<td bgColor="#008080" height="28" align="center" valign="middle">
				<font color="#ffffff"><b>ratingcount</b></font></td>
			<td bgColor="#008080" height="28" align="center" valign="middle">
				<font color="#ffffff"><b>download</b></font></td>
			<td bgColor="#008080" height="28" align="center" valign="middle">
				<font color="#ffffff"><b>price</b></font></td>
			<td bgColor="#008080" height="28" align="center" valign="middle">
				<font color="#ffffff"><b>version</b></font></td>
			<td bgColor="#008080" height="28" align="center" valign="middle">
				<font color="#ffffff"><b>filesize</b></font></td>
			<td bgColor="#008080" height="28" align="center" valign="middle">
				<font color="#ffffff"><b>requireandroid</b></font></td>
		</tr>
		<%
			try {
				rs = stmt.executeQuery(sql);
				while (rs.next()) {
		%>
		<tr>
			<td height="18" vAlign="middle" align="center"><a href="<%=rs.getString(14)%>" target="_blank"><%=rs.getString(1)%></a></td>
			<td height="18" valign="middle" align="center"><%=rs.getString(2)%></td>
			<td height="18" valign="middle" align="center"><%=rs.getString(3)%></td>
			<td height="18" valign="middle" align="center" bgColor="#ffcc68"><%=rs.getInt(4)%></td>
			<td height="18" valign="middle" align="center"><%=rs.getString(5)%></td>
			<td height="18" valign="middle" align="center"><%=rs.getString(6)%></td>
			<td height="18" valign="middle" align="center"><%=rs.getString(7)%></td>
			<td height="18" valign="middle" align="center"><%=rs.getString(8)%></td>
			<td height="18" valign="middle" align="center"><%=rs.getString(9)%></td>
			<td height="18" valign="middle" align="center"><%=rs.getString(10)%></td>
			<td height="18" valign="middle" align="center"><%=rs.getString(11)%></td>
			<td height="18" valign="middle" align="center"><%=rs.getString(12)%></td>
			<td height="18" valign="middle" align="center"><%=rs.getString(13)%></td>
		</tr>
		<%
			}
			} catch (Exception e) {
				System.out.println(e.getMessage());
			}
		%>

	</tbody>
</table>


<%
	try {
		rs.close();
		stmt.close();
		conn.close();

	} catch (Exception e) {
		System.out.println(e.getMessage());

	}
%>

</form>
</center>
</body>
</html>
效果图：
这是我们公司（创新工场

Doodle Mobile

）出品的经典休闲游戏——

3D Bowling

，目前已经进入Android Market全球排名前10
米扑博客

Most Valuable Package of Mobile Internet

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原文： JFreeChart项目实例

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