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解决jfreechart中文乱码方案整理【图】

2009年12月17日 admin 发表评论阅读评论

这篇博文只是对网上关于jfreechart中文乱码解决方法的一个汇总整理。

我也是最近要使用到jfreechart这个图表工具，也是碰到了中文乱码这个问题，后来通过搜索（jfreechart图片乱码等关键词）解决了这个乱码，但发现一个问题就是有的文章只是解决了图表中乱码的某一个方面，比如图表标题，而有的文章不是解决图表标题乱码，却能够解决图表X、Y轴上文字和标题乱码以及底部中文乱码，有鉴于此，于是我就将这些解决方法都汇总在了一起，希望对碰到jfreechart中文乱码的朋友有帮助。

下图是一个柱形图表，非常典型的中文乱码（其他形式图表就不说明了，因为柱形非常有代表性）：

以上图表对应的jsp文件代码为：

<%@ page contentType="text/html;charset=UTF-8"%>

<%@ 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,

org.jfree.data.general.DatasetUtilities,

org.jfree.chart.plot.*,

org.jfree.chart.labels.*,

org.jfree.chart.renderer.category.BarRenderer3D,

java.awt.*,

org.jfree.ui.*,

org.jfree.chart.axis.AxisLocation,org.jfree.chart.title.TextTitle,org.jfree.chart.axis.CategoryAxis,org.jfree.chart.axis.NumberAxis"%>

<%

double[][] data = new double[][] {{1310, 1220, 1110, 1000},{720, 700, 680, 640},{1130, 1020, 980, 800},{440, 400, 360, 300}};

String[] rowKeys = {"猪肉", "niurou","鸡肉", "鱼肉"};

String[] columnKeys = {"广州", "shenzhen", "东莞", "佛山"};

CategoryDataset dataset = DatasetUtilities.createCategoryDataset(rowKeys, columnKeys, data);

JFreeChart chart = ChartFactory.createBarChart3D("","肉类","销量",dataset,PlotOrientation.VERTICAL,true,true,false);

CategoryPlot plot = chart.getCategoryPlot();

//设置网格背景颜色

plot.setBackgroundPaint(Color.white);

//设置网格竖线颜色

plot.setDomainGridlinePaint(Color.pink);

//设置网格横线颜色

plot.setRangeGridlinePaint(Color.pink);

//显示每个柱的数值，并修改该数值的字体属性

BarRenderer3D renderer = new BarRenderer3D();

renderer.setBaseItemLabelGenerator(new StandardCategoryItemLabelGenerator());

renderer.setBaseItemLabelsVisible(true);

//默认的数字显示在柱子中，通过如下两句可调整数字的显示

//注意：此句很关键，若无此句，那数字的显示会被覆盖，给人数字没有显示出来的问题

renderer.setBasePositiveItemLabelPosition(new ItemLabelPosition(ItemLabelAnchor.OUTSIDE12, TextAnchor.BASELINE_LEFT));

renderer.setItemLabelAnchorOffset(10D);

renderer.setItemLabelFont(new Font("宋体", Font.PLAIN, 12));

renderer.setItemLabelsVisible(true);

//设置每个地区所包含的平行柱的之间距离

//renderer.setItemMargin(0.3);

plot.setRenderer(renderer);

//设置地区、销量的显示位置

//将下方的“肉类”放到上方

plot.setDomainAxisLocation(AxisLocation.TOP_OR_RIGHT);

//将默认放在左边的“销量”放到右方

plot.setRangeAxisLocation(AxisLocation.BOTTOM_OR_RIGHT);

String filename = ServletUtilities.saveChartAsPNG(chart, 700, 400, null, session);

String graphURL = request.getContextPath() + "/DisplayChart?filename=" + filename;

%>

<img src="<%= graphURL %>" width=700 height=400 border=0 usemap="#<%= filename %>">

注意到在以上的图表中，有四个位置的中文乱码：

1、图表标题以及副标题乱码

2、 X轴乱码

3、 Y轴乱码

4、图表底部乱码

如下图所示：

对这四个位置的乱码分别进行解决：

NumberAxis numberaxis = (NumberAxis) plot.getRangeAxis();

CategoryAxis domainAxis = plot.getDomainAxis();

1、图表标题以及副标题乱码

Font font = new Font("宋体", Font.BOLD, 16);

TextTitle title = new TextTitle("肉类销量统计图", font);

//副标题

TextTitle subtitle = new TextTitle(“副标题”, new Font(“黑体”, Font.BOLD, 12));

chart.addSubtitle(subtitle);

chart.setTitle(title); //标题

2、 X轴乱码

2.1、X轴坐标上的文字：

domainAxis.setTickLabelFont(new Font(“sans-serif”, Font.PLAIN, 11));

2.2、X轴坐标标题（肉类）

domainAxis.setLabelFont(new Font(“宋体”, Font.PLAIN, 12));

3、 Y轴乱码

3.1、Y轴坐标上的文字：

numberaxis.setTickLabelFont(new Font(“sans-serif”, Font.PLAIN, 12));

3.2、Y轴坐标标题（销量）：

numberaxis.setLabelFont(new Font(“黑体”, Font.PLAIN, 12));

4、图表底部乱码（猪肉等文字）

chart.getLegend().setItemFont(new Font(“宋体”, Font.PLAIN, 12));

通过以上设置就解决了中文乱码了，解决中文乱码后的图表如下所示：

对应的完整代码为(jsp)：

<%@ page contentType="text/html;charset=UTF-8"%>

<%@ 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,

org.jfree.data.general.DatasetUtilities,

org.jfree.chart.plot.*,

org.jfree.chart.labels.*,

org.jfree.chart.renderer.category.BarRenderer3D,

java.awt.*,

org.jfree.ui.*,

org.jfree.chart.axis.AxisLocation,org.jfree.chart.title.TextTitle,org.jfree.chart.axis.CategoryAxis,org.jfree.chart.axis.NumberAxis"%>

<%

double[][] data = new double[][] {{1310, 1220, 1110, 1000},{720, 700, 680, 640},{1130, 1020, 980, 800},{440, 400, 360, 300}};

String[] rowKeys = {"猪肉", "niurou","鸡肉", "鱼肉"};

String[] columnKeys = {"广州", "shenzhen", "东莞", "佛山"};

CategoryDataset dataset = DatasetUtilities.createCategoryDataset(rowKeys, columnKeys, data);

JFreeChart chart = ChartFactory.createBarChart3D("","肉类","销量",dataset,PlotOrientation.VERTICAL,true,true,false);

CategoryPlot plot = chart.getCategoryPlot();

//设置字体，不然会中文乱码的

 Font font = new Font("宋体", Font.BOLD, 16); 

 TextTitle title = new TextTitle("肉类销量统计图", font); 

 //副标题 

 TextTitle subtitle = new TextTitle("副标题", new Font("黑体", Font.BOLD, 12)); 

 chart.addSubtitle(subtitle); 

 chart.setTitle(title); //标题

//////////////////////////

NumberAxis numberaxis = (NumberAxis) plot.getRangeAxis(); 

 CategoryAxis domainAxis = plot.getDomainAxis();  

 /*------设置X轴坐标上的文字-----------*/  

 domainAxis.setTickLabelFont(new Font("sans-serif", Font.PLAIN, 11));  

 /*------设置X轴的标题文字------------*/  

 domainAxis.setLabelFont(new Font("宋体", Font.PLAIN, 12));  

 /*------设置Y轴坐标上的文字-----------*/  

 numberaxis.setTickLabelFont(new Font("sans-serif", Font.PLAIN, 12));  

 /*------设置Y轴的标题文字------------*/  

 numberaxis.setLabelFont(new Font("黑体", Font.PLAIN, 12));  

 /*------这句代码解决了底部汉字乱码的问题-----------*/  

 chart.getLegend().setItemFont(new Font("宋体", Font.PLAIN, 12));

//设置网格背景颜色

plot.setBackgroundPaint(Color.white);

//设置网格竖线颜色

plot.setDomainGridlinePaint(Color.pink);

//设置网格横线颜色

plot.setRangeGridlinePaint(Color.pink);

//显示每个柱的数值，并修改该数值的字体属性

BarRenderer3D renderer = new BarRenderer3D();

renderer.setBaseItemLabelGenerator(new StandardCategoryItemLabelGenerator());

renderer.setBaseItemLabelsVisible(true);

//默认的数字显示在柱子中，通过如下两句可调整数字的显示

//注意：此句很关键，若无此句，那数字的显示会被覆盖，给人数字没有显示出来的问题

renderer.setBasePositiveItemLabelPosition(new ItemLabelPosition(ItemLabelAnchor.OUTSIDE12, TextAnchor.BASELINE_LEFT));

renderer.setItemLabelAnchorOffset(10D);

renderer.setItemLabelFont(new Font("宋体", Font.PLAIN, 12));

renderer.setItemLabelsVisible(true);

//设置每个地区所包含的平行柱的之间距离

//renderer.setItemMargin(0.3);

plot.setRenderer(renderer);

//设置地区、销量的显示位置

//将下方的“肉类”放到上方

plot.setDomainAxisLocation(AxisLocation.TOP_OR_RIGHT);

//将默认放在左边的“销量”放到右方

plot.setRangeAxisLocation(AxisLocation.BOTTOM_OR_RIGHT);

String filename = ServletUtilities.saveChartAsPNG(chart, 700, 400, null, session);

String graphURL = request.getContextPath() + "/DisplayChart?filename=" + filename;

%>

<img src="<%= graphURL %>" width=700 height=400 border=0 usemap="#<%= filename %>">

附录：

1、在使用前必须先在web.xml中配置一下servlet，配置很简单，可以根据自己具体情况配置，以下是我配置的：

<servlet>

<servlet-name>DisplayChart</servlet-name>

<servlet-class>org.jfree.chart.servlet.DisplayChart</servlet-class>

<load-on-startup>1</load-on-startup>

</servlet>

<servlet-mapping>

<servlet-name>DisplayChart</servlet-name>

<url-pattern>/DisplayChart</url-pattern>

</servlet-mapping>

2、附件中是关于饼图、柱形图、曲线图的使用写法例子，也是从网上搜集而来，感觉还是很不错的，也整理在这里了。

下载地址：http://www.blogjava.net/Files/bbmonkey62/jfreechart.rar

3、关于Jfreechart的简单介绍：

JFreeChart是一组功能强大、灵活易用的Java绘图API，使用它可以生成多种通用性的报表，包括柱状图、饼图、曲线图、甘特图等。它能够用在Swing和Web等中制作自定义的图表或报表中，并且得到广泛的应用。

JFreeChart是开放源代码的免费软件，但是它的支持文档需要付费才能得到。

其下载地址为：http://sourceforge.net/projects/jfreechart/files/

我使用的就是目前最新的版本1.0.13。

非转载说明，本博文章皆为原创，转载本博文章请务必注明文章出处：
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本文链接地址: 解决jfreechart中文乱码方案整理【图】

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评论 (5) Trackbacks (0) 发表评论 Trackback

zihou

2010年1月20日17:04 | #1

回复 | 引用

其他图形的乱码解决方法与柱形的解决方法是类似的，所不同的是调用的方法不一样而已，如果有其他图形的乱码还解决不了的，可以在此留言，我尽量给出解决方法。
wenwen

2010年3月29日15:46 | #2

回复 | 引用

你好，我照你的方法配置web.xml，也用你的代码…但是为什么我会出现下面的问题的？
HTTP Status 500 -

type Exception report

message

description The server encountered an internal error () that prevented it from fulfilling this request.

exception

org.apache.jasper.JasperException: Unable to compile class for JSP:

An error occurred at line: 6 in the generated java file
Only a type can be imported. org.jfree.chart.ChartFactory resolves to a package

An error occurred at line: 7 in the generated java file
Only a type can be imported. org.jfree.chart.JFreeChart resolves to a package

An error occurred at line: 8 in the generated java file
Only a type can be imported. org.jfree.chart.plot.PlotOrientation resolves to a package

An error occurred at line: 9 in the generated java file
Only a type can be imported. org.jfree.chart.servlet.ServletUtilities resolves to a package

An error occurred at line: 10 in the generated java file
Only a type can be imported. org.jfree.data.category.CategoryDataset resolves to a package

An error occurred at line: 11 in the generated java file
Only a type can be imported. org.jfree.data.general.DatasetUtilities resolves to a package

An error occurred at line: 14 in the generated java file
Only a type can be imported. org.jfree.chart.renderer.category.BarRenderer3D resolves to a package

An error occurred at line: 17 in the generated java file
Only a type can be imported. org.jfree.chart.axis.AxisLocation resolves to a package

An error occurred at line: 18 in the generated java file
Only a type can be imported. org.jfree.chart.title.TextTitle resolves to a package

An error occurred at line: 19 in the generated java file
Only a type can be imported. org.jfree.chart.axis.CategoryAxis resolves to a package

An error occurred at line: 20 in the generated java file
Only a type can be imported. org.jfree.chart.axis.NumberAxis resolves to a package

An error occurred at line: 35 in the jsp file: /WebRoot/sample02.jsp
CategoryDataset cannot be resolved to a type
32:
33: String[] columnKeys = {“骞垮窞”, “shenzhen”, “涓滆帪”, “浣涘北”};
34:
35: CategoryDataset dataset = DatasetUtilities.createCategoryDataset(rowKeys, columnKeys, data);
36:
37: JFreeChart chart = ChartFactory.createBarChart3D(“”,”鑲夌被”,”閿�噺”,dataset,PlotOrientation.VERTICAL,true,true,false);
38:

An error occurred at line: 35 in the jsp file: /WebRoot/sample02.jsp
DatasetUtilities cannot be resolved
32:
33: String[] columnKeys = {“骞垮窞”, “shenzhen”, “涓滆帪”, “浣涘北”};
34:
35: CategoryDataset dataset = DatasetUtilities.createCategoryDataset(rowKeys, columnKeys, data);
36:
37: JFreeChart chart = ChartFactory.createBarChart3D(“”,”鑲夌被”,”閿�噺”,dataset,PlotOrientation.VERTICAL,true,true,false);
38:

An error occurred at line: 37 in the jsp file: /WebRoot/sample02.jsp
JFreeChart cannot be resolved to a type
34:
35: CategoryDataset dataset = DatasetUtilities.createCategoryDataset(rowKeys, columnKeys, data);
36:
37: JFreeChart chart = ChartFactory.createBarChart3D(“”,”鑲夌被”,”閿�噺”,dataset,PlotOrientation.VERTICAL,true,true,false);
38:
39: CategoryPlot plot = chart.getCategoryPlot();
40:

An error occurred at line: 37 in the jsp file: /WebRoot/sample02.jsp
ChartFactory cannot be resolved
34:
35: CategoryDataset dataset = DatasetUtilities.createCategoryDataset(rowKeys, columnKeys, data);
36:
37: JFreeChart chart = ChartFactory.createBarChart3D(“”,”鑲夌被”,”閿�噺”,dataset,PlotOrientation.VERTICAL,true,true,false);
38:
39: CategoryPlot plot = chart.getCategoryPlot();
40:

An error occurred at line: 37 in the jsp file: /WebRoot/sample02.jsp
PlotOrientation.VERTICAL cannot be resolved to a type
34:
35: CategoryDataset dataset = DatasetUtilities.createCategoryDataset(rowKeys, columnKeys, data);
36:
37: JFreeChart chart = ChartFactory.createBarChart3D(“”,”鑲夌被”,”閿�噺”,dataset,PlotOrientation.VERTICAL,true,true,false);
38:
39: CategoryPlot plot = chart.getCategoryPlot();
40:

An error occurred at line: 39 in the jsp file: /WebRoot/sample02.jsp
CategoryPlot cannot be resolved to a type
36:
37: JFreeChart chart = ChartFactory.createBarChart3D(“”,”鑲夌被”,”閿�噺”,dataset,PlotOrientation.VERTICAL,true,true,false);
38:
39: CategoryPlot plot = chart.getCategoryPlot();
40:
41: //璁剧疆瀛椾綋锛屼笉鐒朵細涓枃涔辩爜鐨�
42:

An error occurred at line: 45 in the jsp file: /WebRoot/sample02.jsp
TextTitle cannot be resolved to a type
42:
43: Font font = new Font(“瀹嬩綋”, Font.BOLD, 16);
44:
45: TextTitle title = new TextTitle(“鑲夌被閿�噺缁熻鍥�, font);
46:
47: //鍓爣棰�
48:

An error occurred at line: 45 in the jsp file: /WebRoot/sample02.jsp
TextTitle cannot be resolved to a type
42:
43: Font font = new Font(“瀹嬩綋”, Font.BOLD, 16);
44:
45: TextTitle title = new TextTitle(“鑲夌被閿�噺缁熻鍥�, font);
46:
47: //鍓爣棰�
48:

An error occurred at line: 49 in the jsp file: /WebRoot/sample02.jsp
TextTitle cannot be resolved to a type
46:
47: //鍓爣棰�
48:
49: TextTitle subtitle = new TextTitle(“鍓爣棰�, new Font(“榛戜綋”, Font.BOLD, 12));
50:
51: chart.addSubtitle(subtitle);
52:

An error occurred at line: 49 in the jsp file: /WebRoot/sample02.jsp
TextTitle cannot be resolved to a type
46:
47: //鍓爣棰�
48:
49: TextTitle subtitle = new TextTitle(“鍓爣棰�, new Font(“榛戜綋”, Font.BOLD, 12));
50:
51: chart.addSubtitle(subtitle);
52:

An error occurred at line: 57 in the jsp file: /WebRoot/sample02.jsp
NumberAxis cannot be resolved to a type
54:
55: //////////////////////////
56:
57: NumberAxis numberaxis = (NumberAxis) plot.getRangeAxis();
58:
59: CategoryAxis domainAxis = plot.getDomainAxis();
60:

An error occurred at line: 57 in the jsp file: /WebRoot/sample02.jsp
NumberAxis cannot be resolved to a type
54:
55: //////////////////////////
56:
57: NumberAxis numberaxis = (NumberAxis) plot.getRangeAxis();
58:
59: CategoryAxis domainAxis = plot.getDomainAxis();
60:

An error occurred at line: 59 in the jsp file: /WebRoot/sample02.jsp
CategoryAxis cannot be resolved to a type
56:
57: NumberAxis numberaxis = (NumberAxis) plot.getRangeAxis();
58:
59: CategoryAxis domainAxis = plot.getDomainAxis();
60:
61: /*——璁剧疆X杞村潗鏍囦笂鐨勬枃瀛�———-*/
62:

An error occurred at line: 95 in the jsp file: /WebRoot/sample02.jsp
BarRenderer3D cannot be resolved to a type
92:
93: //鏄剧ず姣忎釜鏌辩殑鏁板�锛屽苟淇敼璇ユ暟鍊肩殑瀛椾綋灞炴�
94:
95: BarRenderer3D renderer = new BarRenderer3D();
96:
97: renderer.setBaseItemLabelGenerator(new StandardCategoryItemLabelGenerator());
98:

An error occurred at line: 95 in the jsp file: /WebRoot/sample02.jsp
BarRenderer3D cannot be resolved to a type
92:
93: //鏄剧ず姣忎釜鏌辩殑鏁板�锛屽苟淇敼璇ユ暟鍊肩殑瀛椾綋灞炴�
94:
95: BarRenderer3D renderer = new BarRenderer3D();
96:
97: renderer.setBaseItemLabelGenerator(new StandardCategoryItemLabelGenerator());
98:

An error occurred at line: 97 in the jsp file: /WebRoot/sample02.jsp
StandardCategoryItemLabelGenerator cannot be resolved to a type
94:
95: BarRenderer3D renderer = new BarRenderer3D();
96:
97: renderer.setBaseItemLabelGenerator(new StandardCategoryItemLabelGenerator());
98:
99: renderer.setBaseItemLabelsVisible(true);
100:

An error occurred at line: 105 in the jsp file: /WebRoot/sample02.jsp
ItemLabelPosition cannot be resolved to a type
102:
103: //娉ㄦ剰锛氭鍙ュ緢鍏抽敭锛岃嫢鏃犳鍙ワ紝閭ｆ暟瀛楃殑鏄剧ず浼氳瑕嗙洊锛岀粰浜烘暟瀛楁病鏈夋樉绀哄嚭鏉ョ殑闂
104:
105: renderer.setBasePositiveItemLabelPosition(new ItemLabelPosition(ItemLabelAnchor.OUTSIDE12, TextAnchor.BASELINE_LEFT));
106:
107: renderer.setItemLabelAnchorOffset(10D);
108:

An error occurred at line: 105 in the jsp file: /WebRoot/sample02.jsp
ItemLabelAnchor.OUTSIDE12 cannot be resolved to a type
102:
103: //娉ㄦ剰锛氭鍙ュ緢鍏抽敭锛岃嫢鏃犳鍙ワ紝閭ｆ暟瀛楃殑鏄剧ず浼氳瑕嗙洊锛岀粰浜烘暟瀛楁病鏈夋樉绀哄嚭鏉ョ殑闂
104:
105: renderer.setBasePositiveItemLabelPosition(new ItemLabelPosition(ItemLabelAnchor.OUTSIDE12, TextAnchor.BASELINE_LEFT));
106:
107: renderer.setItemLabelAnchorOffset(10D);
108:

An error occurred at line: 105 in the jsp file: /WebRoot/sample02.jsp
TextAnchor.BASELINE_LEFT cannot be resolved to a type
102:
103: //娉ㄦ剰锛氭鍙ュ緢鍏抽敭锛岃嫢鏃犳鍙ワ紝閭ｆ暟瀛楃殑鏄剧ず浼氳瑕嗙洊锛岀粰浜烘暟瀛楁病鏈夋樉绀哄嚭鏉ョ殑闂
104:
105: renderer.setBasePositiveItemLabelPosition(new ItemLabelPosition(ItemLabelAnchor.OUTSIDE12, TextAnchor.BASELINE_LEFT));
106:
107: renderer.setItemLabelAnchorOffset(10D);
108:

An error occurred at line: 123 in the jsp file: /WebRoot/sample02.jsp
AxisLocation.TOP_OR_RIGHT cannot be resolved to a type
120:
121: //灏嗕笅鏂圭殑鈥滆倝绫烩�鏀惧埌涓婃柟
122:
123: plot.setDomainAxisLocation(AxisLocation.TOP_OR_RIGHT);
124:
125: //灏嗛粯璁ゆ斁鍦ㄥ乏杈圭殑鈥滈攢閲忊�鏀惧埌鍙虫柟
126:

An error occurred at line: 127 in the jsp file: /WebRoot/sample02.jsp
AxisLocation.BOTTOM_OR_RIGHT cannot be resolved to a type
124:
125: //灏嗛粯璁ゆ斁鍦ㄥ乏杈圭殑鈥滈攢閲忊�鏀惧埌鍙虫柟
126:
127: plot.setRangeAxisLocation(AxisLocation.BOTTOM_OR_RIGHT);
128:
129: String filename = ServletUtilities.saveChartAsPNG(chart, 700, 400, null, session);
130:

An error occurred at line: 129 in the jsp file: /WebRoot/sample02.jsp
ServletUtilities cannot be resolved
126:
127: plot.setRangeAxisLocation(AxisLocation.BOTTOM_OR_RIGHT);
128:
129: String filename = ServletUtilities.saveChartAsPNG(chart, 700, 400, null, session);
130:
131: String graphURL = request.getContextPath() + “/DisplayChart?filename=” + filename;
132:

Stacktrace:
org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:92)
org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:330)
org.apache.jasper.compiler.JDTCompiler.generateClass(JDTCompiler.java:439)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:334)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:312)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:299)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:589)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:317)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
wenwen

2010年3月29日15:47 | #3

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为什么不能编译文件啊？
子猴

2010年3月29日16:18 | #4

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这种错误一般是系统内部出错，我刚看了下你贴出的错误信息，注意到了如下一些错误：
1、An error occurred at line: 39 in the jsp file: /WebRoot/sample02.jsp
CategoryPlot cannot be resolved to a type
2、An error occurred at line: 49 in the jsp file: /WebRoot/sample02.jsp
TextTitle cannot be resolved to a type
等等一些类不能被识别的错误。。。。
给出的建议如下：
1、请确认所需的jar包已经包含到你的编译环境中，比如包含CategoryPlot类的jar包。
2、如果也是运行的jsp页面，请确认你的jar包已经放在了运行环境包目录下，请注意：1中所说的编译环境与运行环境是不一样的，编译环境是用来编译类的，而运行环境一般是用来运行jsp文件的，运行环境一般是你系统的项目根目录/WebRoot/WEB-INF/lib，你必须将相关的jar包放在这个目录下才能确保jsp文件正常运行
我觉得你的错误很可能是以上第2中所说造成的，你可以先这样确认一下，如果还不行，可以再留言，希望能帮到你。
站长工具

2010年5月25日05:24 | #5

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我用的是另外一个