在Struts2中使用JFreeChar
1、在struts2中，默认的struts-default.xml中，并没有包含chart的result-type，它是插件的形式使用的。把 struts2的解压包的lib里找到struts2-jfreechart-plugin-2.0.11.jar，拷贝到你的项目的 classpath里，同时在struts.xml里面增加一个chart的result-type。
Java代码
<result-types>??
??? <result-type name="chart" type="chart">??
??????? <param name="chart">chart</param>??
??????? <param name="height">400</param>??
??????? <param name="width">700</param>??
??? </result>??
</action>??
<action name="ListAllFruit4Pie2" type="chart">??
??????? <param name="chart">chart</param>??
??????? <param name="height">400</param>??
??????? <param name="width">700</param>??
??? </result>??
</action>?
<result-types>
<result-type name="chart" type="chart">
<param name="chart">chart</param>
<param name="height">400</param>
<param name="width">700</param>
</result>
</action>
<action name="ListAllFruit4Pie2" type="chart">
<param name="chart">chart</param>
<param name="height">400</param>
<param name="width">700</param>
</result>
</action>
2、需要再添加jfreechart-1.0.9.jar和jcommon-1.0.12.jar（JasperReports和JFreeChart都需要的）到你的classpath里面。
3、在你的action代码里，返回一个JFreeChart对象即可。
ListAllFruit4Bar2Action代码：
Java代码
package chart;??
?
import org.jfree.chart.JFreeChart;??
?
import com.opensymphony.xwork2.ActionSupport;??
?
public class ListAllFruit4Bar2Action extends ActionSupport {??
??? private static final long serialVersionUID = 1L;??
??? private JFreeChart chart;??
??????
??? @Override?
??? public String execute() throws Exception {??
??????? chart = FruitService.createBarChart();??
??????? return SUCCESS;??
??? }??
??????
??? public JFreeChart getChart() {??
??????? return chart;??
??? }??
}?
package chart;
import org.jfree.chart.JFreeChart;
import com.opensymphony.xwork2.ActionSupport;
public class ListAllFruit4Bar2Action extends ActionSupport {
private static final long serialVersionUID = 1L;
??? private JFreeChart chart;
@Override
public String execute() throws Exception {
chart = FruitService.createBarChart();
return SUCCESS;
}
public JFreeChart getChart() {
return chart;
}
}
ListAllFruit4Pie2Action代码：
Java代码
package chart;??
?
import org.jfree.chart.JFreeChart;??
?
import com.opensymphony.xwork2.ActionSupport;??
?
public class ListAllFruit4Pie2Action extends ActionSupport {??
??? private static final long serialVersionUID = 1L;??
??? private JFreeChart chart;??
??????
??? @Override?
??? public String execute() throws Exception {??
??????? chart = FruitService.createPaiChart();??
??????? return SUCCESS;??
??? }??
??????
??? public JFreeChart getChart() {??
??????? return chart;??
??? }??
}?
package chart;
import org.jfree.chart.JFreeChart;
import com.opensymphony.xwork2.ActionSupport;
public class ListAllFruit4Pie2Action extends ActionSupport {
private static final long serialVersionUID = 1L;
??? private JFreeChart chart;
@Override
public String execute() throws Exception {
chart = FruitService.createPaiChart();
return SUCCESS;
}
public JFreeChart getChart() {
return chart;
}
}
FruitService代码：
Java代码
package chart;??
?
import org.jfree.chart.ChartFactory;??
import org.jfree.chart.JFreeChart;??
import org.jfree.chart.plot.PlotOrientation;??
import org.jfree.data.category.CategoryDataset;??
import org.jfree.data.category.DefaultCategoryDataset;??
?
public class FruitService {??
?
??? public static JFreeChart createBarChart() {??
??????? CategoryDataset dataset = getDataSet2();??
??????? JFreeChart chart = ChartFactory.createBarChart3D(??
??????????????? "水果产量图", // 图表标题??
??????????????? "水果", // 目录轴的显示标签??
??????????????? "产量", // 数值轴的显示标签??
??????????????? dataset, // 数据集??
??????????????? PlotOrientation.VERTICAL, // 图表方向：水平、垂直??
??????????????? true,?? // 是否显示图例(对于简单的柱状图必须是false)??
??????????????? true,?? // 是否生成工具??
??????????????? true??? // 是否生成URL链接??
??????????????? );??
??????? return chart;??
??? }??
?
??? private static CategoryDataset getDataSet2() {??
??????? DefaultCategoryDataset dataset = new DefaultCategoryDataset();??
??????? dataset.addValue(100, "北京", "苹果");??
??????? dataset.addValue(100, "上海", "苹果");??
??????? dataset.addValue(100, "广州", "苹果");??
??????? dataset.addValue(200, "北京", "梨子");??
??????? dataset.addValue(200, "上海", "梨子");??
??????? dataset.addValue(200, "广州", "梨子");??
??????? dataset.addValue(300, "北京", "葡萄");??
??????? dataset.addValue(300, "上海", "葡萄");??
??????? dataset.addValue(300, "广州", "葡萄");??
??????? dataset.addValue(400, "北京", "香蕉");??
??????? dataset.addValue(400, "上海", "香蕉");??
??????? dataset.addValue(400, "广州", "香蕉");??
??????? dataset.addValue(500, "北京", "荔枝");??
??????? dataset.addValue(500, "上海", "荔枝");??
??????? dataset.addValue(500, "广州", "荔枝");??
??????? return dataset;??
??? }??
???????
??? public static JFreeChart createPaiChart() {??
??????? DefaultPieDataset data = getDataSet();??
??????? JFreeChart chart = ChartFactory.createPieChart3D("水果产量图",? // 图表标题??
??????? data,???
??????? true, // 是否显示图例??
??????? false,??
??????? false?
??????? );??
??????? PiePlot plot = (PiePlot) chart.getPlot();??
??????? resetPiePlot(plot);??
??????? return chart;??
??? }??
??????
??? private static void resetPiePlot(PiePlot plot) {??
??????? String unitSytle = "{0}={1}({2})";??
??????????
??????? plot.setNoDataMessage("无对应的数据，请重新查询。");??
??????? plot.setNoDataMessagePaint(Color.red);??
??????????
??????? //指定 section 轮廓线的厚度(OutlinePaint不能为null)??
??????? plot.setOutlineStroke(new BasicStroke(0));??
??????????
??????? //设置第一个 section 的开始位置，默认是12点钟方向??
??????? plot.setStartAngle(90);???????????
?
??????? plot.setToolTipGenerator(new StandardPieToolTipGenerator(unitSytle,??
??????????????? NumberFormat.getNumberInstance(),??
??????????????? new DecimalFormat("0.00%")));??
??????????
??????? //指定图片的透明度??
??????? plot.setForegroundAlpha(0.65f);??
??????????
??????? //引出标签显示样式??
??????? plot.setLabelGenerator(new StandardPieSectionLabelGenerator(unitSytle,??
??????????????? NumberFormat.getNumberInstance(),??
??????????????? new DecimalFormat("0.00%")));??
??????????????
??????? //图例显示样式??
??????? plot.setLegendLabelGenerator(new StandardPieSectionLabelGenerator(unitSytle,??
??????????????? NumberFormat.getNumberInstance(),??
??????????????? new DecimalFormat("0.00%")));??
??? }??
?
??? private static DefaultPieDataset getDataSet() {??
??????? DefaultPieDataset dataset = new DefaultPieDataset();??
??????? dataset.setValue("苹果",100);??
??????? dataset.setValue("梨子",200);??
??????? dataset.setValue("葡萄",300);??
??????? dataset.setValue("香蕉",400);??
??????? dataset.setValue("荔枝",500);??
??????? return dataset;??
??? }??
?
}?
package chart;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.data.category.CategoryDataset;
import org.jfree.data.category.DefaultCategoryDataset;
public class FruitService {
public static JFreeChart createBarChart() {
CategoryDataset dataset = getDataSet2();
JFreeChart chart = ChartFactory.createBarChart3D(
"水果产量图", // 图表标题
"水果", // 目录轴的显示标签
"产量", // 数值轴的显示标签
dataset, // 数据集
PlotOrientation.VERTICAL, // 图表方向：水平、垂直
true, // 是否显示图例(对于简单的柱状图必须是false)
true, // 是否生成工具
true // 是否生成URL链接
);
return chart;
}
private static CategoryDataset getDataSet2() {
DefaultCategoryDataset dataset = new DefaultCategoryDataset();
dataset.addValue(100, "北京", "苹果");
dataset.addValue(100, "上海", "苹果");
dataset.addValue(100, "广州", "苹果");
dataset.addValue(200, "北京", "梨子");
dataset.addValue(200, "上海", "梨子");
dataset.addValue(200, "广州", "梨子");
dataset.addValue(300, "北京", "葡萄");
dataset.addValue(300, "上海", "葡萄");
dataset.addValue(300, "广州", "葡萄");
dataset.addValue(400, "北京", "香蕉");
dataset.addValue(400, "上海", "香蕉");
dataset.addValue(400, "广州", "香蕉");
dataset.addValue(500, "北京", "荔枝");
dataset.addValue(500, "上海", "荔枝");
dataset.addValue(500, "广州", "荔枝");
return dataset;
}
????
??? public static JFreeChart createPaiChart() {
DefaultPieDataset data = getDataSet();
JFreeChart chart = ChartFactory.createPieChart3D("水果产量图",? // 图表标题
data,
true, // 是否显示图例
false,
false
);
PiePlot plot = (PiePlot) chart.getPlot();
resetPiePlot(plot);
return chart;
}
private static void resetPiePlot(PiePlot plot) {
String unitSytle = "{0}={1}({2})";
plot.setNoDataMessage("无对应的数据，请重新查询。");
plot.setNoDataMessagePaint(Color.red);
//指定 section 轮廓线的厚度(OutlinePaint不能为null)
plot.setOutlineStroke(new BasicStroke(0));
//设置第一个 section 的开始位置，默认是12点钟方向
plot.setStartAngle(90);
plot.setToolTipGenerator(new StandardPieToolTipGenerator(unitSytle,
NumberFormat.getNumberInstance(),
new DecimalFormat("0.00%")));
//指定图片的透明度
plot.setForegroundAlpha(0.65f);
//引出标签显示样式
plot.setLabelGenerator(new StandardPieSectionLabelGenerator(unitSytle,
NumberFormat.getNumberInstance(),
new DecimalFormat("0.00%")));
//图例显示样式
plot.setLegendLabelGenerator(new StandardPieSectionLabelGenerator(unitSytle,
NumberFormat.getNumberInstance(),
new DecimalFormat("0.00%")));
}
private static DefaultPieDataset getDataSet() {
DefaultPieDataset dataset = new DefaultPieDataset();
dataset.setValue("苹果",100);
dataset.setValue("梨子",200);
dataset.setValue("葡萄",300);
dataset.setValue("香蕉",400);
dataset.setValue("荔枝",500);
return dataset;
}
}
4、同时在jsp页面里显示--柱图和饼图。
增加一个ListAllFruit4BarAndPie的action：
Java代码
<action name="ListAllFruit4BarAndPie" type="dispatcher">/WEB-INF/chart/ListAllFruit4BarAndPie.jsp</result>??
</action>?
<action name="ListAllFruit4BarAndPie" type="dispatcher">/WEB-INF/chart/ListAllFruit4BarAndPie.jsp</result>
</action>
ListAllFruit4BarAndPie.jsp代码：
Java代码
<%@ page contentType="text/html; charset=UTF-8" %>??
<html>??
<head>??
??? <title>ListAllFruit4BarAndPie</title>??
</head>??
<body>??
??? <center><h2>使用柱图和饼图列取所有水果产量</h2></center>??
??? 柱图:<img src="chart/ListAllFruit4Bar2.action"><br/>??
??? 饼图:<img src="chart/ListAllFruit4Pie2.action">??
</body>??
</html>?
<%@ page contentType="text/html; charset=UTF-8" %>
<html>
<head>
??? <title>ListAllFruit4BarAndPie</title>
</head>
<body>
<center><h2>使用柱图和饼图列取所有水果产量</h2></center>
柱图:<img src="chart/ListAllFruit4Bar2.action"><br/>
饼图:<img src="chart/ListAllFruit4Pie2.action">
</body>
</html>
????????????
生成的HTML的效果图如下：?
? 
?文章出处：http://liyanboss.iteye.com/blog/181282
