1、在struts2中，默認的struts-default.xml中，并沒有包含chart的result-type，它是插件的形式使用的。把 struts2的解壓包的lib里找到struts2-jfreechart-plugin-2.0.11.jar，拷貝到你的項目的 classpath里，同時在struts.xml里面增加一個chart的result-type。
Java代碼
<result-types>??
??? <result-type name="chart" class="org.apache.struts2.dispatcher.ChartResult"/>??
</result-types>??
<action name="ListAllFruit4Bar2" class="chart.ListAllFruit4Bar2Action">??
??? <result name="success" type="chart">??
??????? <param name="chart">chart</param>??
??????? <param name="height">400</param>??
??????? <param name="width">700</param>??
??? </result>??
</action>??
<action name="ListAllFruit4Pie2" class="chart.ListAllFruit4Pie2Action">??
??? <result name="success" 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" class="org.apache.struts2.dispatcher.ChartResult"/>
</result-types>
<action name="ListAllFruit4Bar2" class="chart.ListAllFruit4Bar2Action">
<result name="success" type="chart">
<param name="chart">chart</param>
<param name="height">400</param>
<param name="width">700</param>
</result>
</action>
<action name="ListAllFruit4Pie2" class="chart.ListAllFruit4Pie2Action">
<result name="success" 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代碼里，返回一個JFreeChart對象即可。
ListAllFruit4Bar2Action代碼：
Java代碼
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代碼：
Java代碼
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代碼：
Java代碼
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(??
??????????????? "水果產量圖", // 圖表標題??
??????????????? "水果", // 目錄軸的顯示標簽??
??????????????? "產量", // 數值軸的顯示標簽??
??????????????? dataset, // 數據集??
??????????????? PlotOrientation.VERTICAL, // 圖表方向：水平、垂直??
??????????????? true,?? // 是否顯示圖例(對于簡單的柱狀圖必須是false)??
??????????????? true,?? // 是否生成工具??
??????????????? true??? // 是否生成URL鏈接??
??????????????? );??
??????? return chart;??
??? }??
?
??? private static CategoryDataset getDataSet2() {??
??????? DefaultCategoryDataset dataset = new DefaultCategoryDataset();??
??????? dataset.addValue(100, "北京", "蘋果");??
??????? dataset.addValue(100, "上海", "蘋果");??
??????? dataset.addValue(100, "廣州", "蘋果");??
??????? dataset.addValue(200, "北京", "梨子");??
??????? dataset.addValue(200, "上海", "梨子");??
??????? dataset.addValue(200, "廣州", "梨子");??
??????? dataset.addValue(300, "北京", "葡萄");??
??????? dataset.addValue(300, "上海", "葡萄");??
??????? dataset.addValue(300, "廣州", "葡萄");??
??????? dataset.addValue(400, "北京", "香蕉");??
??????? dataset.addValue(400, "上海", "香蕉");??
??????? dataset.addValue(400, "廣州", "香蕉");??
??????? dataset.addValue(500, "北京", "荔枝");??
??????? dataset.addValue(500, "上海", "荔枝");??
??????? dataset.addValue(500, "廣州", "荔枝");??
??????? return dataset;??
??? }??
???????
??? public static JFreeChart createPaiChart() {??
??????? DefaultPieDataset data = getDataSet();??
??????? JFreeChart chart = ChartFactory.createPieChart3D("水果產量圖",? // 圖表標題??
??????? data,???
??????? true, // 是否顯示圖例??
??????? false,??
??????? false?
??????? );??
??????? PiePlot plot = (PiePlot) chart.getPlot();??
??????? resetPiePlot(plot);??
??????? return chart;??
??? }??
??????
??? private static void resetPiePlot(PiePlot plot) {??
??????? String unitSytle = "{0}={1}({2})";??
??????????
??????? plot.setNoDataMessage("無對應的數據，請重新查詢。");??
??????? plot.setNoDataMessagePaint(Color.red);??
??????????
??????? //指定 section 輪廓線的厚度(OutlinePaint不能為null)??
??????? plot.setOutlineStroke(new BasicStroke(0));??
??????????
??????? //設置第一個 section 的開始位置，默認是12點鐘方向??
??????? plot.setStartAngle(90);???????????
?
??????? plot.setToolTipGenerator(new StandardPieToolTipGenerator(unitSytle,??
??????????????? NumberFormat.getNumberInstance(),??
??????????????? new DecimalFormat("0.00%")));??
??????????
??????? //指定圖片的透明度??
??????? plot.setForegroundAlpha(0.65f);??
??????????
??????? //引出標簽顯示樣式??
??????? plot.setLabelGenerator(new StandardPieSectionLabelGenerator(unitSytle,??
??????????????? NumberFormat.getNumberInstance(),??
??????????????? new DecimalFormat("0.00%")));??
??????????????
??????? //圖例顯示樣式??
??????? plot.setLegendLabelGenerator(new StandardPieSectionLabelGenerator(unitSytle,??
??????????????? NumberFormat.getNumberInstance(),??
??????????????? new DecimalFormat("0.00%")));??
??? }??
?
??? private static DefaultPieDataset getDataSet() {??
??????? DefaultPieDataset dataset = new DefaultPieDataset();??
??????? dataset.setValue("蘋果",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(
"水果產量圖", // 圖表標題
"水果", // 目錄軸的顯示標簽
"產量", // 數值軸的顯示標簽
dataset, // 數據集
PlotOrientation.VERTICAL, // 圖表方向：水平、垂直
true, // 是否顯示圖例(對于簡單的柱狀圖必須是false)
true, // 是否生成工具
true // 是否生成URL鏈接
);
return chart;
}
private static CategoryDataset getDataSet2() {
DefaultCategoryDataset dataset = new DefaultCategoryDataset();
dataset.addValue(100, "北京", "蘋果");
dataset.addValue(100, "上海", "蘋果");
dataset.addValue(100, "廣州", "蘋果");
dataset.addValue(200, "北京", "梨子");
dataset.addValue(200, "上海", "梨子");
dataset.addValue(200, "廣州", "梨子");
dataset.addValue(300, "北京", "葡萄");
dataset.addValue(300, "上海", "葡萄");
dataset.addValue(300, "廣州", "葡萄");
dataset.addValue(400, "北京", "香蕉");
dataset.addValue(400, "上海", "香蕉");
dataset.addValue(400, "廣州", "香蕉");
dataset.addValue(500, "北京", "荔枝");
dataset.addValue(500, "上海", "荔枝");
dataset.addValue(500, "廣州", "荔枝");
return dataset;
}
????
??? public static JFreeChart createPaiChart() {
DefaultPieDataset data = getDataSet();
JFreeChart chart = ChartFactory.createPieChart3D("水果產量圖",? // 圖表標題
data,
true, // 是否顯示圖例
false,
false
);
PiePlot plot = (PiePlot) chart.getPlot();
resetPiePlot(plot);
return chart;
}
private static void resetPiePlot(PiePlot plot) {
String unitSytle = "{0}={1}({2})";
plot.setNoDataMessage("無對應的數據，請重新查詢。");
plot.setNoDataMessagePaint(Color.red);
//指定 section 輪廓線的厚度(OutlinePaint不能為null)
plot.setOutlineStroke(new BasicStroke(0));
//設置第一個 section 的開始位置，默認是12點鐘方向
plot.setStartAngle(90);
plot.setToolTipGenerator(new StandardPieToolTipGenerator(unitSytle,
NumberFormat.getNumberInstance(),
new DecimalFormat("0.00%")));
//指定圖片的透明度
plot.setForegroundAlpha(0.65f);
//引出標簽顯示樣式
plot.setLabelGenerator(new StandardPieSectionLabelGenerator(unitSytle,
NumberFormat.getNumberInstance(),
new DecimalFormat("0.00%")));
//圖例顯示樣式
plot.setLegendLabelGenerator(new StandardPieSectionLabelGenerator(unitSytle,
NumberFormat.getNumberInstance(),
new DecimalFormat("0.00%")));
}
private static DefaultPieDataset getDataSet() {
DefaultPieDataset dataset = new DefaultPieDataset();
dataset.setValue("蘋果",100);
dataset.setValue("梨子",200);
dataset.setValue("葡萄",300);
dataset.setValue("香蕉",400);
dataset.setValue("荔枝",500);
return dataset;
}
}
4、同時在jsp頁面里顯示--柱圖和餅圖。
增加一個ListAllFruit4BarAndPie的action：
Java代碼
<action name="ListAllFruit4BarAndPie" class="">??
??? <result name="success" type="dispatcher">/WEB-INF/chart/ListAllFruit4BarAndPie.jsp</result>??
</action>?
<action name="ListAllFruit4BarAndPie" class="">
<result name="success" type="dispatcher">/WEB-INF/chart/ListAllFruit4BarAndPie.jsp</result>
</action>
ListAllFruit4BarAndPie.jsp代碼：
Java代碼
<%@ page contentType="text/html; charset=UTF-8" %>??
<html>??
<head>??
??? <title>ListAllFruit4BarAndPie</title>??
</head>??
<body>??
??? <center><h2>使用柱圖和餅圖列取所有水果產量</h2></center>??
??? 柱圖:<img src="chart/ListAllFruit4Bar2.action"><br/>??
??? 餅圖:<img src="chart/ListAllFruit4Pie2.action">??
</body>??
</html>?
<%@ page contentType="text/html; charset=UTF-8" %>
<html>
<head>
??? <title>ListAllFruit4BarAndPie</title>
</head>
<body>
<center><h2>使用柱圖和餅圖列取所有水果產量</h2></center>
柱圖:<img src="chart/ListAllFruit4Bar2.action"><br/>
餅圖:<img src="chart/ListAllFruit4Pie2.action">
</body>
</html>
????????????
生成的HTML的效果圖如下：?
?
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