SSH框架通过JFreeChart实现柱状图和获取项目路径

获取项目路径:String url= ServletActionContext.getRequest().getRealPath("/upload");

一.直接生成的图片输出到jsp页面

1.jsp页面

  1. <%@ page language="java" contentType="text/html; charset=UTF-8"
  2. pageEncoding="UTF-8"%>
  3. <%@ taglib prefix="s" uri="/struts-tags" %>
  4. <%
  5. String path = request.getContextPath();
  6. String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
  7. %>
  8. <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
  9. <html>
  10. <head>
  11. <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
  12. <base href="<%=basePath%>">
  13. <title>Insert title here</title>
  14. </head>
  15. <body>
  16. <!--img src='D:\temp\chart.jpg' width="680" height="700" onload="alert('图片存在');"  onerror="alert('无此图片');"/-->
  17. <img alt="统计图" src="<%=basePath%>/chart2.action">
  18. </body>
  19. </html>
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags" %>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<base href="<%=basePath%>">
<title>Insert title here</title>
</head>
<body>
<!--img src='D:\temp\chart.jpg' width="680" height="700" onload="alert('图片存在');" onerror="alert('无此图片');"/-->
<img alt="统计图" src="<%=basePath%>/chart2.action">
</body>
</html>

2.action类

  1. public String execute() throws Exception{
  2. //添加数据
  3. DefaultCategoryDataset dataset = new DefaultCategoryDataset();
  4. dataset.addValue(42000, "月份" , "1月");
  5. dataset.addValue(40000 , "月份" , "2月");
  6. dataset.addValue(34000 , "月份" , "3月");
  7. dataset.addValue(18000 , "月份" , "4月");
  8. dataset.addValue(26000 , "月份" , "5月");
  9. dataset.addValue(42000 , "月份" , "6月");
  10. dataset.addValue(40000 , "月份" , "7月");
  11. dataset.addValue(34000 , "月份" , "8月");
  12. dataset.addValue(18000 , "月份" , "9月");
  13. dataset.addValue(26000 , "月份" , "10月");
  14. dataset.addValue(45000 , "月份" , "11月");
  15. dataset.addValue(38000 , "月份" , "12月");
  16. //创建一个柱状图
  17. JFreeChart chart = ChartFactory.createBarChart3D("年度人口统计图", "人口", "数量",dataset,PlotOrientation.VERTICAL, true, false, false);
  18. chart.setTitle(new TextTitle("年度人口统计图", new Font("黑体", Font.ITALIC,22)));
  19. LegendTitle legend = chart.getLegend(0);
  20. legend.setItemFont(new Font("宋体", Font.BOLD, 14));
  21. CategoryPlot plot = (CategoryPlot) chart.getPlot();
  22. CategoryAxis categoryAxis = plot.getDomainAxis();
  23. categoryAxis.setLabelFont(new Font("宋体", Font.BOLD, 22));
  24. categoryAxis.setCategoryLabelPositions(CategoryLabelPositions.UP_45);
  25. categoryAxis.setTickLabelFont(new Font("宋体", Font.BOLD, 18));
  26. NumberAxis numberAxis = (NumberAxis) plot.getRangeAxis();
  27. numberAxis.setLabelFont(new Font("宋体", Font.BOLD, 22));
  28. HttpServletResponse response=ServletActionContext.getResponse();
  29. response.setContentType("image/");
  30. ChartUtilities.writeChartAsJPEG(response.getOutputStream(), 1, chart, 900, 600, null);
  31. response.getOutputStream().close();
  32. return null;
  33. }
	public String execute() throws Exception{
//添加数据
DefaultCategoryDataset dataset = new DefaultCategoryDataset();
dataset.addValue(42000, "月份" , "1月");
dataset.addValue(40000 , "月份" , "2月");
dataset.addValue(34000 , "月份" , "3月");
dataset.addValue(18000 , "月份" , "4月");
dataset.addValue(26000 , "月份" , "5月");
dataset.addValue(42000 , "月份" , "6月");
dataset.addValue(40000 , "月份" , "7月");
dataset.addValue(34000 , "月份" , "8月");
dataset.addValue(18000 , "月份" , "9月");
dataset.addValue(26000 , "月份" , "10月");
dataset.addValue(45000 , "月份" , "11月");
dataset.addValue(38000 , "月份" , "12月");
		//创建一个柱状图
JFreeChart chart = ChartFactory.createBarChart3D("年度人口统计图", "人口", "数量",dataset,PlotOrientation.VERTICAL, true, false, false);
chart.setTitle(new TextTitle("年度人口统计图", new Font("黑体", Font.ITALIC,22)));
LegendTitle legend = chart.getLegend(0);
legend.setItemFont(new Font("宋体", Font.BOLD, 14));
CategoryPlot plot = (CategoryPlot) chart.getPlot();
CategoryAxis categoryAxis = plot.getDomainAxis();
categoryAxis.setLabelFont(new Font("宋体", Font.BOLD, 22));
categoryAxis.setCategoryLabelPositions(CategoryLabelPositions.UP_45);
categoryAxis.setTickLabelFont(new Font("宋体", Font.BOLD, 18));
NumberAxis numberAxis = (NumberAxis) plot.getRangeAxis();
numberAxis.setLabelFont(new Font("宋体", Font.BOLD, 22)); HttpServletResponse response=ServletActionContext.getResponse();
response.setContentType("image/");
ChartUtilities.writeChartAsJPEG(response.getOutputStream(), 1, chart, 900, 600, null);
response.getOutputStream().close(); return null;
}
</pre>3.struts.xml配置<p></p>
  1. <action name="chart2" class="Char2tAction">
  2. <result name="success">/Chart.jsp</result>
  3. </action>
      <action name="chart2" class="Char2tAction">
<result name="success">/Chart.jsp</result>
</action>


Tip:参考的别的文章包一定得继承两个类,或者修改源码,实践正确配置如下:

<!-- 柱状图 -->
<package name="struts2" extends="struts-default,jfreechart-default">
<action name="chart2" class="com.ssh.app.web.action.CreateChartBar">

<result name="success">/tLiveStatistics.jsp</result>

</action>
</package>

4.效果图

SSH框架通过JFreeChart实现柱状图和获取项目路径

二.生成图片保存到本地:

1.生成图片

  1. public void createChart() {
  2. // TODO Auto-generated method stub
  3. DefaultCategoryDataset dataset = new DefaultCategoryDataset();
  4. dataset.addValue(1001, "1", "A");
  5. dataset.addValue(800, "2", "A");
  6. dataset.addValue(150, "3", "A");
  7. dataset.addValue(150, "1", "B");
  8. dataset.addValue(150, "2", "B");
  9. dataset.addValue(250, "3", "B");
  10. dataset.addValue(150, "1", "C");
  11. dataset.addValue(33, "2", "C");
  12. dataset.addValue(900, "3", "C");
  13. //      JFreeChart chart = ChartFactory.createBarChart3D(
  14. //                                          "", // 图表标题
  15. //                                          "", // 目录轴的显示标签
  16. //                                          "产量", // 数值轴的显示标签
  17. //                                          dataset, // 数据集
  18. //                                          PlotOrientation.VERTICAL , // 图表方向:垂直
  19. //                                          true, // 是否显示图例(对于简单的柱状图必须是false)
  20. //                                          false, // 是否生成工具
  21. //                                          false // 是否生成URL链接
  22. //                                  );
  23. //JFreeChart chart = ChartFactory.createBarChart3D("","","产量",dataset,PlotOrientation.VERTICAL,true,false,false);
  24. JFreeChart chart = ChartFactory.createBarChart3D("销量统计图", "种类", "产量", dataset, PlotOrientation.VERTICAL, true, false, false);
  25. //重新设置图标标题,改变字体
  26. chart.setTitle(new TextTitle("销量统计图", new Font("黑体", Font.ITALIC , 22)));
  27. //取得统计图标的第一个图例
  28. LegendTitle legend = chart.getLegend(0);
  29. //修改图例的字体
  30. legend.setItemFont(new Font("宋体", Font.BOLD, 14));
  31. //legend.setItemFont(new Font("宋体", Font.TRUETYPE_FONT, 14));
  32. CategoryPlot plot = (CategoryPlot)chart.getPlot();
  33. chart.setBackgroundPaint(ChartColor.WHITE);
  34. //设置柱状图到图片上端的距离
  35. ValueAxis rangeAxis = plot.getRangeAxis();
  36. rangeAxis.setUpperMargin(0.5);
  37. //取得横轴
  38. CategoryAxis categoryAxis = plot.getDomainAxis();
  39. //设置横轴显示标签的字体
  40. categoryAxis.setLabelFont(new Font("宋体" , Font.BOLD , 22));
  41. //分类标签以45度角倾斜
  42. //              categoryAxis.setCategoryLabelPositions(CategoryLabelPositions.UP_45);
  43. categoryAxis.setTickLabelFont(new Font("宋体" , Font.BOLD , 18));
  44. //取得纵轴
  45. NumberAxis numberAxis = (NumberAxis)plot.getRangeAxis();
  46. //设置纵轴显示标签的字体
  47. numberAxis.setLabelFont(new Font("宋体" , Font.BOLD , 22));
  48. //在柱体的上面显示数据
  49. BarRenderer custombarrenderer3d = new BarRenderer();
  50. custombarrenderer3d.setBaseItemLabelPaint(Color.BLACK);//数据字体的颜色
  51. custombarrenderer3d.setBaseItemLabelGenerator(new StandardCategoryItemLabelGenerator());
  52. custombarrenderer3d.setBaseItemLabelsVisible(true);
  53. plot.setRenderer(custombarrenderer3d);
  54. //HttpServletRequest request = null;
  55. //request.getSession().getServletContext().getRealPath("/");
  56. //URL a = Thread.currentThread().getContextClassLoader().getResource("");
  57. //URL a = Thread.currentThread().getContextClassLoader().getResource("");
  58. //System.out.println(a);
  59. FileOutputStream fos = null;
  60. //String imagePath = "D:\\chart.jpg";
  61. String imagePath = "D:\\temp\\chart.jpg";
  62. ChartRenderingInfo info = new ChartRenderingInfo();
  63. try {
  64. fos = new FileOutputStream(imagePath);
  65. //将统计图标输出成JPG文件
  66. ChartUtilities.writeChartAsJPEG(
  67. fos, //输出到哪个输出流
  68. 1, //JPEG图片的质量,0~1之间
  69. chart, //统计图标对象
  70. 800, //宽
  71. 600,//高
  72. info //ChartRenderingInfo 信息
  73. );
  74. fos.close();
  75. } catch (FileNotFoundException e) {
  76. // TODO Auto-generated catch block
  77. e.printStackTrace();
  78. } catch (IOException e) {
  79. // TODO Auto-generated catch block
  80. e.printStackTrace();
  81. }
  82. }
	public void createChart() {
// TODO Auto-generated method stub
DefaultCategoryDataset dataset = new DefaultCategoryDataset();
dataset.addValue(1001, "1", "A");
dataset.addValue(800, "2", "A");
dataset.addValue(150, "3", "A");
dataset.addValue(150, "1", "B");
dataset.addValue(150, "2", "B");
dataset.addValue(250, "3", "B");
dataset.addValue(150, "1", "C");
dataset.addValue(33, "2", "C");
dataset.addValue(900, "3", "C");
// JFreeChart chart = ChartFactory.createBarChart3D(
// "", // 图表标题
// "", // 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:垂直
// true, // 是否显示图例(对于简单的柱状图必须是false)
// false, // 是否生成工具
// false // 是否生成URL链接
// );
//JFreeChart chart = ChartFactory.createBarChart3D("","","产量",dataset,PlotOrientation.VERTICAL,true,false,false);
JFreeChart chart = ChartFactory.createBarChart3D("销量统计图", "种类", "产量", dataset, PlotOrientation.VERTICAL, true, false, false);
	//重新设置图标标题,改变字体
chart.setTitle(new TextTitle("销量统计图", new Font("黑体", Font.ITALIC , 22)));
//取得统计图标的第一个图例
LegendTitle legend = chart.getLegend(0);
//修改图例的字体
legend.setItemFont(new Font("宋体", Font.BOLD, 14));
//legend.setItemFont(new Font("宋体", Font.TRUETYPE_FONT, 14));
CategoryPlot plot = (CategoryPlot)chart.getPlot(); chart.setBackgroundPaint(ChartColor.WHITE); //设置柱状图到图片上端的距离
ValueAxis rangeAxis = plot.getRangeAxis();
rangeAxis.setUpperMargin(0.5); //取得横轴
CategoryAxis categoryAxis = plot.getDomainAxis();
//设置横轴显示标签的字体
categoryAxis.setLabelFont(new Font("宋体" , Font.BOLD , 22));
//分类标签以45度角倾斜

// categoryAxis.setCategoryLabelPositions(CategoryLabelPositions.UP_45);

categoryAxis.setTickLabelFont(new Font("宋体" , Font.BOLD , 18));

			//取得纵轴
NumberAxis numberAxis = (NumberAxis)plot.getRangeAxis();
//设置纵轴显示标签的字体
numberAxis.setLabelFont(new Font("宋体" , Font.BOLD , 22)); //在柱体的上面显示数据
BarRenderer custombarrenderer3d = new BarRenderer();
custombarrenderer3d.setBaseItemLabelPaint(Color.BLACK);//数据字体的颜色
custombarrenderer3d.setBaseItemLabelGenerator(new StandardCategoryItemLabelGenerator());
custombarrenderer3d.setBaseItemLabelsVisible(true);
plot.setRenderer(custombarrenderer3d);
//HttpServletRequest request = null;
//request.getSession().getServletContext().getRealPath("/");
//URL a = Thread.currentThread().getContextClassLoader().getResource("");
//URL a = Thread.currentThread().getContextClassLoader().getResource("");
//System.out.println(a);
FileOutputStream fos = null;
//String imagePath = "D:\\chart.jpg";
String imagePath = "D:\\temp\\chart.jpg";
ChartRenderingInfo info = new ChartRenderingInfo();
try {
fos = new FileOutputStream(imagePath);
//将统计图标输出成JPG文件
ChartUtilities.writeChartAsJPEG(
fos, //输出到哪个输出流
1, //JPEG图片的质量,0~1之间
chart, //统计图标对象
800, //宽
600,//高
info //ChartRenderingInfo 信息
);
fos.close();
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block e.printStackTrace();
} }</pre><br>

2.显示到jsp:     

  1. try{
  2. String impath = "D:\\temp\\chart.jpg";//此处的图路径,是上面所示代码中生成柱状图的存储路径
  3. File file = new File(impath);
  4. InputStream inputStream = null;
  5. if(file.exists()){
  6. try {
  7. inputStream = new FileInputStream(file);
  8. } catch (FileNotFoundException e) {
  9. }
  10. }
  11. int i = inputStream.available();
  12. byte data[] = new byte[i];
  13. inputStream.read(data);
  14. HttpServletResponse response = ServletActionContext.getResponse();
  15. ServletOutputStream out = response.getOutputStream();
  16. response.setContentType("image/jpeg");
  17. out.write(data);
  18. out.flush();
  19. out.close();
  20. }catch(IOException e){
  21. e.printStackTrace();
  22. }
		try{
		String impath = "D:\\temp\\chart.jpg";//此处的图路径,是上面所示代码中生成柱状图的存储路径
File file = new File(impath); InputStream inputStream = null;
if(file.exists()){
try {
inputStream = new FileInputStream(file); } catch (FileNotFoundException e) { }
} int i = inputStream.available();
byte data[] = new byte[i];
inputStream.read(data); HttpServletResponse response = ServletActionContext.getResponse();
ServletOutputStream out = response.getOutputStream(); response.setContentType("image/jpeg"); out.write(data);
out.flush();
out.close(); }catch(IOException e){
e.printStackTrace();
}</pre><br>
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