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JFreeChart项目实例

發布時間：2024/9/5 编程问答 37 豆豆

生活随笔收集整理的這篇文章主要介紹了 JFreeChart项目实例小編覺得挺不錯的,現在分享給大家,幫大家做個參考.

最近利用JFreeChart和MySQL數據庫做了一個JSP網頁，展現Android Martet全球10個國家的TOP800游戲排名的曲線走勢

準備知識，請先閱讀我先前寫的博客
JFreeChart學習示例

Linux JSP連接MySQL數據庫

需導入jar包如下：

完整代碼：

<%@ 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 連接JDBC String MYSQL_DRIVER = "com.mysql.jdbc.Driver"; String MYSQL_URL = "jdbc:mysql://localhost:3306/top800"; // 數據庫查詢語句 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="游戲名稱">游戲名稱</option> <option value="游戲包名">游戲包名</option> </select>： <input type="text" name="game_keyword" style="width:300px" /> ???? 所屬國家： <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> ???? 記錄時間： <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="查詢" style="width:60px"> </div> <hr style="width: 80%" /> <% String game_type = new String("游戲名稱"); 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 = "游戲名稱" : 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("游戲名稱")) { 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("游戲包名")) { 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 = "游戲名稱"; 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>所屬國家：</b></td> <td><%=countryname%></td> </tr> <tr> <td valign="middle"><b>記錄時間：</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 { // 連接 MySQL 數據庫 Class.forName(MYSQL_DRIVER).newInstance(); conn = DriverManager.getConnection(MYSQL_URL, "root", ""); stmt = conn.createStatement(); rs = stmt.executeQuery(sql); // 遍歷讀取的數據集 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); // 構造JFreeChart的數據集dataset } } } catch (Exception e) { System.err.println(e.getMessage()); } JFreeChart chart = ChartFactory.createLineChart( chartTitle, // 標題 "記錄時間", // 橫軸名稱 "游戲排名", // 縱軸名稱 dataset, // 數據集 PlotOrientation.VERTICAL, // 垂直視圖 true, true, true ); final CategoryPlot plot = (CategoryPlot) chart.getPlot(); plot.setBackgroundPaint(Color.lightGray); // 背景色 plot.setRangeGridlinePaint(Color.blue); // 橫軸虛線 plot.setRangeGridlinesVisible(true); // 橫軸虛線是否可見 final NumberAxis rangeAxis = (NumberAxis) plot.getRangeAxis(); rangeAxis.setAutoRangeMinimumSize(1); // 距離為1 rangeAxis.setAutoRangeIncludesZero(true); // 從零計算 rangeAxis.setInverted(true); // 縱軸逆序（原點到頂端，是從大到小） final CategoryAxis categoryAxis = plot.getDomainAxis(); if (limitTop == 7) { categoryAxis.setCategoryLabelPositions(CategoryLabelPositions.STANDARD); // 橫軸標準顯示（水平） } else { categoryAxis.setCategoryLabelPositions(CategoryLabelPositions.UP_45); // 橫軸45度顯示（傾斜） } 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); // 生成圖片 url_jpg = request.getContextPath() + "/servlet/DisplayChart?filename=" + file_jpg; // 圖片路徑 } catch (Exception e) { out.println(e); } finally { try { fos_jpg.close(); } catch (Exception e) { e.printStackTrace(); } } %> <img src=<%=url_jpg%> border="1" />  <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>

效果圖：

這是我們公司出品的經典休閑游戲——3D Bowling，目前已經進入Android Market全球排名前10

轉載于:https://www.cnblogs.com/springmvc-hibernate/archive/2011/10/29/2484070.html

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