Jfreechart与Tapestry4.0 结合实现(下)
5)Java类文件:
??? 5-1)StatChartServic.java类:
java 代码?

1. package?com.ce.jfreechart.service;??
2. ??
3. import?java.awt.Color;??
4. import?java.io.IOException;??
5. import?java.text.SimpleDateFormat;??
6. import?java.util.Calendar;??
7. import?java.util.Date;??
8. import?java.util.HashMap;??
9. import?java.util.Map;??
10. ??
11. import?javax.servlet.http.HttpServletRequest;??
12. import?javax.servlet.http.HttpServletResponse;??
13. ??
14. import?org.apache.tapestry.IRequestCycle;??
15. import?org.apache.tapestry.engine.IEngineService;??
16. import?org.apache.tapestry.engine.ILink;??
17. import?org.apache.tapestry.services.Infrastructure;??
18. import?org.apache.tapestry.services.LinkFactory;??
19. import?org.jfree.chart.ChartFactory;??
20. import?org.jfree.chart.ChartUtilities;??
21. import?org.jfree.chart.JFreeChart;??
22. import?org.jfree.chart.axis.CategoryAxis;??
23. import?org.jfree.chart.axis.DateAxis;??
24. import?org.jfree.chart.labels.StandardCategoryItemLabelGenerator;??
25. import?org.jfree.chart.plot.CategoryPlot;??
26. import?org.jfree.chart.plot.PiePlot;??
27. import?org.jfree.chart.plot.PlotOrientation;??
28. import?org.jfree.chart.plot.XYPlot;??
29. import?org.jfree.chart.renderer.category.BarRenderer3D;??
30. import?org.jfree.chart.renderer.xy.XYItemRenderer;??
31. import?org.jfree.chart.renderer.xy.XYLineAndShapeRenderer;??
32. import?org.jfree.chart.urls.StandardPieURLGenerator;??
33. import?org.jfree.data.category.DefaultCategoryDataset;??
34. import?org.jfree.data.general.DefaultPieDataset;??
35. import?org.jfree.data.time.Day;??
36. import?org.jfree.data.time.Hour;??
37. import?org.jfree.data.time.Minute;??
38. import?org.jfree.data.time.Month;??
39. import?org.jfree.data.time.TimeSeries;??
40. import?org.jfree.data.time.TimeSeriesCollection;??
41. import?org.jfree.ui.RectangleInsets;??
42. import?com.ce.jfreechart.vo.PieChartVO;??
43. ??
44. /**?
45. ?*?功能描述：生成统计结果图的服务类（现主要针对胼图）??
46. ?*/??
47. public?class?StatChartService?implements?IEngineService?{??
48. ????private?HttpServletRequest?request;??
49. ??
50. ????private?HttpServletResponse?response;??
51. ??
52. ????private?LinkFactory?linkFactory;??
53. ??
54. ????private?Infrastructure?infrastructure;??
55. ??
56. ????private?final?static?String?SERVICE_NAME?=?"chart";??
57. ??
58. ????public?final?static?String?CHART_PARAS_OBJ_NAME?=?"pcVo";??
59. ??
60. ????public?void?setResponse(HttpServletResponse?response)?{??
61. ????????this.response?=?response;??
62. ????}??
63. ??
64. ????public?void?setRequest(HttpServletRequest?request)?{??
65. ????????this.request?=?request;??
66. ????}??
67. ??
68. ????public?void?setLinkFactory(LinkFactory?linkFactory)?{??
69. ????????this.linkFactory?=?linkFactory;??
70. ????}??
71. ??
72. ????public?ILink?getLink(boolean?post,?Object?parameter)?{??
73. ????????Map?parameters?=?new?HashMap();??
74. ????????return?linkFactory.constructLink(this,?post,?parameters,?false);??
75. ????}??
76. ??
77. ????public?void?setInfrastructure(Infrastructure?infrastructure)?{??
78. ????????this.infrastructure?=?infrastructure;??
79. ????}??
80. ??
81. ????public?String?getName()?{??
82. ????????return?SERVICE_NAME;??
83. ????}??
84. ??
85. ????public?void?service(IRequestCycle?cycle)?throws?IOException?{??
86. ????????PieChartVO?pcVo?=?(PieChartVO)?request.getSession()??
87. ????????????????.getAttribute(CHART_PARAS_OBJ_NAME);??
88. ????????if?(pcVo?==?null)?{??
89. ????????????return;??
90. ????????}??
91. ??
92. ????????Chart?chart?=?new?Chart();??
93. ??
94. ????????try?{??
95. ????????????chart.getPieChart3D(request,?response,?pcVo);??
96. ????????}?finally?{??
97. ????????????request.getSession().removeAttribute(CHART_PARAS_OBJ_NAME);??
98. ????????}??
99. ????}??
100. }??
101. ??
102. /**?
103. ?*?功能描述：输出JFreeChart图的类?
104. ?*/??
105. class?Chart?{??
106. ??
107. ????/**?
108. ?????*?方法描述：生成3D胼状图的方法?
109. ?????*??
110. ?????*?@param?request?
111. ?????*????????????：HttpServletRequest?
112. ?????*?@param?response?
113. ?????*????????????：HttpServletResponse?
114. ?????*?@param?PieChartVO??
115. ?????*????????????：参数传递vo?
116. ?????*?@throws?IOException?
117. ?????*/??
118. ????public?void?getPieChart3D(HttpServletRequest?request,??
119. ????????????HttpServletResponse?response,?PieChartVO?pcVo)?throws?IOException?{??
120. ????????response.setDateHeader("Expires",?0);??
121. ????????response.setContentType("image/jpeg");??
122. ??
123. ????????String?title?=?pcVo.getTitle();??
124. ??
125. ????????String[]?name?=?pcVo.getName();??
126. ??
127. ????????double[]?value?=?pcVo.getValue();??
128. ??
129. ????????int?width?=?pcVo.getWidth();??
130. ??
131. ????????int?hight?=?pcVo.getHight();??
132. ??
133. ????????if?(title?==?null?||?"".equals(title))?{??
134. ????????????title?=?"?";??
135. ????????}??
136. ????????if?(name?==?null?||?name.length?==?0?||?value?==?null??
137. ????????????????||?value.length?==?0)?{??
138. ????????????return;??
139. ????????}??
140. ????????if?(width?<=?0)?{??
141. ????????????width?=?400;??
142. ????????}??
143. ????????if?(hight?<=?0)?{??
144. ????????????hight?=?400;??
145. ????????}??
146. ??
147. ????????DefaultPieDataset?defaultpiedataset?=?new?DefaultPieDataset();??
148. ????????int?j?=?name.length?<=?value.length???name.length?:?value.length;??
149. ????????for?(int?i?=?0;?i?<?j;?i++)?{??
150. ????????????defaultpiedataset.setValue(name[i],?value[i]);??
151. ????????}??
152. ??
153. ????????JFreeChart?chart?=?ChartFactory.createPieChart3D(title,??
154. ????????????????defaultpiedataset,?true,?true,?false);??
155. ??
156. ????????chart.setBackgroundPaint(Color.WHITE);??
157. ????????PiePlot?plot?=?(PiePlot)?chart.getPlot();?????
158. ????????plot.setNoDataMessage("No?data?available");?????
159. ????????ChartUtilities.writeChartAsJPEG(response.getOutputStream(),?chart,??
160. ????????????????width,?hight);??
161. ????}??
162. ??
163. }??

PieChartPage.java页面类
java 代码?

1. package?com.ce.jfreechart.page;??
2. ??
3. import?javax.servlet.http.HttpServletRequest;??
4. ??
5. import?org.apache.tapestry.annotations.InjectObject;??
6. import?org.apache.tapestry.event.PageBeginRenderListener;??
7. import?org.apache.tapestry.event.PageEvent;??
8. ??
9. import?com.ce.jfreechart.service.StatChartService;??
10. import?com.ce.jfreechart.vo.PieChartVO;??
11. ??
12. /**?
13. ?*?功能描述：公司人员统计页?
14. ?*/??
15. public?abstract?class?PieChartPage?extends?org.apache.tapestry.html.BasePage?implements?PageBeginRenderListener{??
16. ????private?final?String?title??=?"公司人员统计饼状图";??
17. ??????
18. ????@InjectObject("service:tapestry.globals.HttpServletRequest)?
19. ????public?abstract?HttpServletRequest?getRequest();?
20. ?????
21. ????/**??
22. ?????*?页面开始表现时触发，或form重表现时也会触发?
23. ????*/???
24. ????public?void?pageBeginRender(PageEvent?event)?{?
25. ?????????
26. ????????if?(!event.getRequestCycle().isRewinding())?{?
27. ????????????try{?????
28. ?????????????????
29. ????????????????//画饼图?
30. ????????????????String[]?name?=?{"管理人员","市场人员","开发人员","OEM人员","其他人员"};??
31. ????????????????double[]?value?=?{10.02D,20.23D,56.80D,12.30D,5.98D};??
32. ????????????????PieChartVO?pcVo?=?new?PieChartVO();??
33. ????????????????pcVo.setTitle(title);??
34. ????????????????pcVo.setName(name);??
35. ????????????????pcVo.setValue(value);??
36. ????????????????pcVo.setWidth(450);??
37. ????????????????pcVo.setHight(300);??
38. ????????????????if(this.getRequest().getSession().getAttribute(StatChartService.CHART_PARAS_OBJ_NAME)==null)???
39. ????????????????????this.getRequest().getSession().setAttribute(StatChartService.CHART_PARAS_OBJ_NAME,?pcVo);??
40. ????????????}catch(Exception?e){??
41. ????????????????e.printStackTrace();??
42. ????????????}?????
43. ????????}??
44. ????}??
45. }??

参数Vo对象:java 代码?

1. /**?
2. ?*?功能描述：生成JFreeChart饼图的参数Vo对象?
3. ?*/??
4. public?class?PieChartVO?implements?Serializable?{??
5. ??
6. ????private?static?final?long?serialVersionUID?=?1L;??
7. ??
8. ????/**?
9. ?????*?图表标题?
10. ?????*/??
11. ????private?String?title;??
12. ??
13. ????/**?
14. ?????*?具体项名称数组?
15. ?????*/??
16. ????private?String[]?name;??
17. ??
18. ????/**?
19. ?????*?具体项值数组?
20. ?????*/??
21. ????private?double[]?value;??
22. ??
23. ????/**?
24. ?????*?图表宽度?
25. ?????*/??
26. ????private?int?width;??
27. ??
28. ????/**?
29. ?????*?图表高度?
30. ?????*/??
31. ????private?int?hight;??
32. ??
33. ????方法略......??
34. }??

PieChart.html页面文件
xml 代码?

1. >??
2. <html>??
3. ??<head>??
4. ????<title>PieChart.html<!---->title>??
5. ??????
6. ????<meta?http-equiv="keywords"?content="keyword1,keyword2,keyword3">??
7. ????<meta?http-equiv="description"?content="this?is?my?page">??
8. ????<meta?http-equiv="content-type"?content="text/html;?charset=UTF-8">??
9. ??????
10. ????<!---->??
11. ??
12. ??<!---->head>??
13. ????
14. ??<body>??
15. ??<!---->??
16. ??????????????<div?align="center"><img?src="app?service=chart"?border="0"/><!---->div>??
17. ??<!---->body>??
18. <!---->html>??

PieChart.page文件
xml 代码?

1. xml?version="1.0"?encoding="GBK"?>??
3. ??"-//Apache?Software?Foundation//Tapestry?Specification?4.0//EN"???
4. ??"http://jakarta.apache.org/tapestry/dtd/Tapestry_4_0.dtd">??
5. ??
6. <page-specification?class="com.ce.jfreechart.page.PieChartPage">??????????
7. <!---->page-specification>??

1 楼 axiang_2898 2007-05-25 你好,关于jfreechart放入值的问题:
如你上面的:
String[] name = {"管理人员","市场人员","开发人员","OEM人员","管理人员"};
double[] value = {10.02D,20.23D,56.80D,12.30D,5.98D};
PieChartVO pcVo = new PieChartVO();
pcVo.setTitle(title); 6
pcVo.setName(name);
pcVo.setValue(value);

上面的name有二个:管理人员,也就是显示图形时只会显示最后一名称的值,如何把这二个值相加显示呢? 2 楼 kevin_gzhz 2007-06-14 对于在name里出现两个相同"管理人员"的情况我没有尝试过,不过这些都是根据需求自定义的,出现这种情况应该是自己手动去合并数值才是对的,没必要去测试JFreeChart的智能有多高!!