jfreechart 折线图 日期显示问题 我在横轴上要显示1个月的31天记录,为什么日期显示的不正确,是隔着显示的,比如1-5,1-12,1-19,1-26,每次都是+7。我要显示的是31天的记录啊,我数据里记录都是正常的,为什么显示在报表上就不对了,请问需要设置什么属性才能正确显示? 解决方案 » 免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货 我的 jfreechart 源代码给你1:饼图: package test; import java.awt.Font; import javax.swing.JPanel; import org.jfree.chart.ChartFactory;import org.jfree.chart.ChartPanel;import org.jfree.chart.JFreeChart;import org.jfree.chart.plot.PiePlot;import org.jfree.data.general.DefaultPieDataset;import org.jfree.data.general.PieDataset;import org.jfree.ui.ApplicationFrame;import org.jfree.ui.RefineryUtilities; public class PieCharts extends ApplicationFrame{ public PieCharts(String s){ super(s); setContentPane(createDemoPanel()); } // 生成显示图表的面板 public static JPanel createDemoPanel(){ JFreeChart jfreechart = createChart(createDataset()); return new ChartPanel(jfreechart); } // 生成饼图数据集对象 public static PieDataset createDataset(){ DefaultPieDataset defaultpiedataset = new DefaultPieDataset(); defaultpiedataset.setValue("管理人员",10.02D); defaultpiedataset.setValue("市场人员",20.23D); defaultpiedataset.setValue("开发人员",60.02D); defaultpiedataset.setValue("OEM人员",10.02D); defaultpiedataset.setValue("其他人员",5.11D); return defaultpiedataset; } //生成图表主对象JFreeChart public static JFreeChart createChart(PieDataset piedataset){ //定义图表对象 JFreeChart jfreechart = ChartFactory.createPieChart("CityInfoPort公司组织架构图",piedataset,true,true,false); //获得图表显示对象 PiePlot pieplot = (PiePlot)jfreechart.getPlot(); //设置图表标签字体 pieplot.setLabelFont(new Font("SansSerif",Font.BOLD,12)); pieplot.setNoDataMessage("No data available"); pieplot.setCircular(true); pieplot.setLabelGap(0.01D);//间距 return jfreechart; } public static void main(String[] args){ PieCharts fjc = new PieCharts("CityInfoPort公司组织架构图"); fjc.pack(); RefineryUtilities.centerFrameOnScreen(fjc); fjc.setVisible(true); } }2:折线图 package test; import javax.swing.JPanel; import org.jfree.chart.ChartFactory;import org.jfree.chart.ChartPanel;import org.jfree.chart.JFreeChart;import org.jfree.chart.axis.NumberAxis;import org.jfree.chart.plot.CategoryPlot;import org.jfree.chart.plot.PlotOrientation;import org.jfree.data.category.DefaultCategoryDataset;import org.jfree.ui.ApplicationFrame;import org.jfree.ui.RefineryUtilities; public class LineCharts extends ApplicationFrame { public LineCharts(String s) { super(s); setContentPane(createDemoLine()); } public static void main(String[] args) { LineCharts fjc = new LineCharts("折线图"); fjc.pack(); RefineryUtilities.centerFrameOnScreen(fjc); fjc.setVisible(true); } // 生成显示图表的面板 public static JPanel createDemoLine() { JFreeChart jfreechart = createChart(createDataset()); return new ChartPanel(jfreechart); } // 生成图表主对象JFreeChart public static JFreeChart createChart(DefaultCategoryDataset linedataset) { //定义图表对象 JFreeChart chart = ChartFactory.createLineChart("折线图", // chart title "时间", // domain axis label "销售额(百万)", // range axis label linedataset, // data PlotOrientation.VERTICAL, // orientation true, // include legend true, // tooltips false // urls ); CategoryPlot plot = chart.getCategoryPlot(); // customise the range axis... NumberAxis rangeAxis = (NumberAxis) plot.getRangeAxis(); rangeAxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits()); rangeAxis.setAutoRangeIncludesZero(true); rangeAxis.setUpperMargin(0.20); rangeAxis.setLabelAngle(Math.PI / 2.0); return chart; } //生成数据 public static DefaultCategoryDataset createDataset() { DefaultCategoryDataset linedataset = new DefaultCategoryDataset(); // 各曲线名称 String series1 = "冰箱"; String series2 = "彩电"; String series3 = "洗衣机"; // 横轴名称(列名称) String type1 = "1月"; String type2 = "2月"; String type3 = "3月"; linedataset.addValue(0.0, series1, type1); linedataset.addValue(4.2, series1, type2); linedataset.addValue(3.9, series1, type3); linedataset.addValue(1.0, series2, type1); linedataset.addValue(5.2, series2, type2); linedataset.addValue(7.9, series2, type3); linedataset.addValue(2.0, series3, type1); linedataset.addValue(9.2, series3, type2); linedataset.addValue(8.9, series3, type3); return linedataset; } }3:柱状图: package test; import java.awt.Color; import javax.swing.JPanel; import org.jfree.chart.ChartFactory;import org.jfree.chart.ChartPanel;import org.jfree.chart.JFreeChart;import org.jfree.chart.labels.StandardCategoryItemLabelGenerator;import org.jfree.chart.plot.CategoryPlot;import org.jfree.chart.plot.PlotOrientation;import org.jfree.chart.renderer.category.BarRenderer3D;import org.jfree.data.category.CategoryDataset;import org.jfree.data.general.DatasetUtilities;import org.jfree.ui.ApplicationFrame;import org.jfree.ui.RefineryUtilities; public class BarCharts extends ApplicationFrame { public BarCharts(String s) { super(s); setContentPane(createDemoBar()); } // 生成显示图表的面板 public static JPanel createDemoBar() { JFreeChart jfreechart = createChart(createDataset()); return new ChartPanel(jfreechart); } // 生成图表主对象JFreeChart public static JFreeChart createChart(CategoryDataset dataset) { JFreeChart chart = ChartFactory.createBarChart3D("水果销量统计图", //建立3D柱状图 "水果",//横轴名称 "销量",//纵轴名称 dataset,//数据集 PlotOrientation.VERTICAL,//纵向显示 true,//显示每个颜色柱子的柱名 false, false); CategoryPlot plot = chart.getCategoryPlot();//设置图的高级属性 BarRenderer3D renderer = new BarRenderer3D();//3D属性修改 renderer.setBaseOutlinePaint(Color.BLACK);//设置边框颜色为black renderer.setWallPaint(Color.gray); //设置wall的颜色为gray renderer .setItemLabelGenerator(new StandardCategoryItemLabelGenerator());//设置柱顶数据,API中居然没有StandardCategoryItemLabelGenerator这个类 //renderer.setItemLabelFont(new Font("黑体",Font.PLAIN,12));//设置柱顶数据字体 renderer.setItemLabelsVisible(true);//打开ItemLabel开关 plot.setRenderer(renderer);//将修改后的属性值保存到图中 plot.setForegroundAlpha(0.6f);//柱的透明度 return chart; } // 生成数据 public static CategoryDataset createDataset() { double[][] data = new double[][] { { 672, 766, 223, 540, 126 }, { 325, 521, 210, 340, 106 }, { 332, 256, 523, 240, 526 } };// 设置数据 String[] rowKeys = { "苹果", "梨子", "葡萄" };// 行标志 String[] columnKeys = { "北京", "上海", "广州", "成都", "深圳" };// 列标志 CategoryDataset linedataset = DatasetUtilities.createCategoryDataset( rowKeys, columnKeys, data); // 建立数据集 return linedataset; } public static void main(String[] args) { BarCharts fjc = new BarCharts("柱状图"); fjc.pack(); RefineryUtilities.centerFrameOnScreen(fjc); fjc.setVisible(true); } } ◆新手求助◆ jasper excel servlet!! 数据显示问题 jsp问题请高手指教 在web中使用输入输出流的问题~~ 各位大虾帮帮忙! 如何将类文件装成jar文件? 想讨论一下关于一个BEAN对应多个表的问题。 在 JSP 中怎么进行各种数据类型的转换? jsp与sqlserver链接的登陆 jdbc strut2配置问题 struts2 页面自增量
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.plot.PiePlot;
import org.jfree.data.general.DefaultPieDataset;
import org.jfree.data.general.PieDataset;
import org.jfree.ui.ApplicationFrame;
import org.jfree.ui.RefineryUtilities; public class PieCharts extends ApplicationFrame{
public PieCharts(String s){
super(s);
setContentPane(createDemoPanel());
}
// 生成显示图表的面板
public static JPanel createDemoPanel(){
JFreeChart jfreechart = createChart(createDataset());
return new ChartPanel(jfreechart);
}
// 生成饼图数据集对象
public static PieDataset createDataset(){
DefaultPieDataset defaultpiedataset = new DefaultPieDataset();
defaultpiedataset.setValue("管理人员",10.02D);
defaultpiedataset.setValue("市场人员",20.23D);
defaultpiedataset.setValue("开发人员",60.02D);
defaultpiedataset.setValue("OEM人员",10.02D);
defaultpiedataset.setValue("其他人员",5.11D);
return defaultpiedataset;
}
//生成图表主对象JFreeChart
public static JFreeChart createChart(PieDataset piedataset){
//定义图表对象
JFreeChart jfreechart = ChartFactory.createPieChart("CityInfoPort公司组织架构图",piedataset,true,true,false);
//获得图表显示对象
PiePlot pieplot = (PiePlot)jfreechart.getPlot();
//设置图表标签字体
pieplot.setLabelFont(new Font("SansSerif",Font.BOLD,12));
pieplot.setNoDataMessage("No data available");
pieplot.setCircular(true);
pieplot.setLabelGap(0.01D);//间距
return jfreechart;
}
public static void main(String[] args){
PieCharts fjc = new PieCharts("CityInfoPort公司组织架构图");
fjc.pack();
RefineryUtilities.centerFrameOnScreen(fjc);
fjc.setVisible(true);
} }
2:折线图
package test; import javax.swing.JPanel; import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.plot.CategoryPlot;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.data.category.DefaultCategoryDataset;
import org.jfree.ui.ApplicationFrame;
import org.jfree.ui.RefineryUtilities; public class LineCharts extends ApplicationFrame { public LineCharts(String s) {
super(s);
setContentPane(createDemoLine());
} public static void main(String[] args) {
LineCharts fjc = new LineCharts("折线图");
fjc.pack();
RefineryUtilities.centerFrameOnScreen(fjc);
fjc.setVisible(true); } // 生成显示图表的面板
public static JPanel createDemoLine() {
JFreeChart jfreechart = createChart(createDataset());
return new ChartPanel(jfreechart);
} // 生成图表主对象JFreeChart
public static JFreeChart createChart(DefaultCategoryDataset linedataset) {
//定义图表对象
JFreeChart chart = ChartFactory.createLineChart("折线图", // chart title
"时间", // domain axis label
"销售额(百万)", // range axis label
linedataset, // data
PlotOrientation.VERTICAL, // orientation
true, // include legend
true, // tooltips
false // urls
);
CategoryPlot plot = chart.getCategoryPlot();
// customise the range axis...
NumberAxis rangeAxis = (NumberAxis) plot.getRangeAxis();
rangeAxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());
rangeAxis.setAutoRangeIncludesZero(true);
rangeAxis.setUpperMargin(0.20);
rangeAxis.setLabelAngle(Math.PI / 2.0); return chart;
} //生成数据
public static DefaultCategoryDataset createDataset() {
DefaultCategoryDataset linedataset = new DefaultCategoryDataset();
// 各曲线名称
String series1 = "冰箱";
String series2 = "彩电";
String series3 = "洗衣机"; // 横轴名称(列名称)
String type1 = "1月";
String type2 = "2月";
String type3 = "3月"; linedataset.addValue(0.0, series1, type1);
linedataset.addValue(4.2, series1, type2);
linedataset.addValue(3.9, series1, type3); linedataset.addValue(1.0, series2, type1);
linedataset.addValue(5.2, series2, type2);
linedataset.addValue(7.9, series2, type3); linedataset.addValue(2.0, series3, type1);
linedataset.addValue(9.2, series3, type2);
linedataset.addValue(8.9, series3, type3); return linedataset;
} }
3:柱状图:
package test; import java.awt.Color; import javax.swing.JPanel; import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.labels.StandardCategoryItemLabelGenerator;
import org.jfree.chart.plot.CategoryPlot;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.renderer.category.BarRenderer3D;
import org.jfree.data.category.CategoryDataset;
import org.jfree.data.general.DatasetUtilities;
import org.jfree.ui.ApplicationFrame;
import org.jfree.ui.RefineryUtilities; public class BarCharts extends ApplicationFrame { public BarCharts(String s) {
super(s);
setContentPane(createDemoBar());
} // 生成显示图表的面板
public static JPanel createDemoBar() {
JFreeChart jfreechart = createChart(createDataset());
return new ChartPanel(jfreechart);
} // 生成图表主对象JFreeChart
public static JFreeChart createChart(CategoryDataset dataset) {
JFreeChart chart = ChartFactory.createBarChart3D("水果销量统计图", //建立3D柱状图
"水果",//横轴名称
"销量",//纵轴名称
dataset,//数据集
PlotOrientation.VERTICAL,//纵向显示
true,//显示每个颜色柱子的柱名
false, false);
CategoryPlot plot = chart.getCategoryPlot();//设置图的高级属性
BarRenderer3D renderer = new BarRenderer3D();//3D属性修改
renderer.setBaseOutlinePaint(Color.BLACK);//设置边框颜色为black
renderer.setWallPaint(Color.gray); //设置wall的颜色为gray
renderer
.setItemLabelGenerator(new StandardCategoryItemLabelGenerator());//设置柱顶数据,API中居然没有StandardCategoryItemLabelGenerator这个类
//renderer.setItemLabelFont(new Font("黑体",Font.PLAIN,12));//设置柱顶数据字体
renderer.setItemLabelsVisible(true);//打开ItemLabel开关
plot.setRenderer(renderer);//将修改后的属性值保存到图中
plot.setForegroundAlpha(0.6f);//柱的透明度 return chart;
} // 生成数据
public static CategoryDataset createDataset() { double[][] data = new double[][] { { 672, 766, 223, 540, 126 },
{ 325, 521, 210, 340, 106 }, { 332, 256, 523, 240, 526 } };// 设置数据
String[] rowKeys = { "苹果", "梨子", "葡萄" };// 行标志
String[] columnKeys = { "北京", "上海", "广州", "成都", "深圳" };// 列标志
CategoryDataset linedataset = DatasetUtilities.createCategoryDataset(
rowKeys, columnKeys, data); // 建立数据集 return linedataset;
} public static void main(String[] args) {
BarCharts fjc = new BarCharts("柱状图");
fjc.pack();
RefineryUtilities.centerFrameOnScreen(fjc);
fjc.setVisible(true); } }