你可以试试chrome加birt.其实jvm内存是有限的,几百万个点很快就吃光你的内存了.
如果你用birt虽然后台画的时候慢一点,但是结果就是一个网页展示jpg图片,所以前端用户那里应该还是比较快的.
package?com.lei.jfreechart;
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?{
/**
*?
*/
private?static?final?long?serialVersionUID?=?1L;
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("一季度销售曲线",?//折线图名称
"时间",?//?横坐标名称
"销售额(百万)",?//?纵坐标名称
linedataset,?//?数据
PlotOrientation.VERTICAL,?//?水平显示图像
true,?//?include?legend
true,?//?tooltips
false?//?urls
);
CategoryPlot?plot?=?chart.getCategoryPlot();
plot.setRangeGridlinesVisible(true);?//是否显示格子线
NumberAxis?rangeAxis?=?(NumberAxis)plot.getRangeAxis();
rangeAxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());
rangeAxis.setAutoRangeIncludesZero(true);
return?chart;
//?生成数据
public?static?DefaultCategoryDataset?createDataset()?{
DefaultCategoryDataset?linedataset?=?new?DefaultCategoryDataset();
//?各曲线名称
String?series1?=?"冰箱";
//?横轴名称(列名称)
String?type1?=?"1月";
linedataset.addValue(0.0,?series1,?type1);
return?linedataset;
网友分享,看看是否能帮到你
public?class?XYJFrame?extends?javax.swing.JFrame?{
*?Creates?new?form?XYJFrame
public?XYJFrame()?{
initComponents();
iniCoordinate();
*?Netbeans?生成的代码,用于界面设计
//?editor-fold?defaultstate="collapsed"?desc="Generated?Code"?????
private?void?initComponents()?{
lblXCoordinate?=?new?javax.swing.JLabel();
lblYCoordinate?=?new?javax.swing.JLabel();
txtXCoordinate?=?new?javax.swing.JTextField();
txtYCoordinate?=?new?javax.swing.JTextField();
btnCalculateY?=?new?javax.swing.JButton();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
lblXCoordinate.setText("X?坐标");
lblYCoordinate.setText("Y?坐标");
btnCalculateY.setText("计算?Y?坐标");
btnCalculateY.addActionListener(new?java.awt.event.ActionListener()?{
public?void?actionPerformed(java.awt.event.ActionEvent?evt)?{
btnCalculateYActionPerformed(evt);
});
javax.swing.GroupLayout?layout?=?new?javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(lblXCoordinate)
.addComponent(lblYCoordinate))
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING,?false)
.addComponent(txtXCoordinate)
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING,?layout.createSequentialGroup()
.addComponent(btnCalculateY)
layout.setVerticalGroup(
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(txtXCoordinate,?javax.swing.GroupLayout.PREFERRED_SIZE,?javax.swing.GroupLayout.DEFAULT_SIZE,?javax.swing.GroupLayout.PREFERRED_SIZE))
.addComponent(lblYCoordinate)
.addComponent(txtYCoordinate,?javax.swing.GroupLayout.PREFERRED_SIZE,?javax.swing.GroupLayout.DEFAULT_SIZE,?javax.swing.GroupLayout.PREFERRED_SIZE))
pack();
}//?/editor-fold?????
private?void?btnCalculateYActionPerformed(java.awt.event.ActionEvent?evt)?{????????
this.txtYCoordinate.setText(this.calculateY()?+?"");
}????????
public?static?void?main(String?args[])?{
/*?Set?the?Nimbus?look?and?feel?*/
//editor-fold?defaultstate="collapsed"?desc="?Look?and?feel?setting?code?(optional)?"
*?For?details?see?
try?{
for?(javax.swing.UIManager.LookAndFeelInfo?info?:?javax.swing.UIManager.getInstalledLookAndFeels())?{
if?("Nimbus".equals(info.getName()))?{
javax.swing.UIManager.setLookAndFeel(info.getClassName());
break;
}?catch?(ClassNotFoundException?ex)?{
java.util.logging.Logger.getLogger(XYJFrame.class.getName()).log(java.util.logging.Level.SEVERE,?null,?ex);
}?catch?(InstantiationException?ex)?{
}?catch?(IllegalAccessException?ex)?{
}?catch?(javax.swing.UnsupportedLookAndFeelException?ex)?{
///editor-fold
java.awt.EventQueue.invokeLater(new?Runnable()?{
public?void?run()?{
new?XYJFrame().setVisible(true);
private?void?iniCoordinate()?{
//?转折点?X?坐标
//?转折点?Y?坐标
//?计算?Y?坐标
private?double?calculateY()?{
double?xCoordinate?=?Double.parseDouble(this.txtXCoordinate.getText());
int?xPos?=?getXPositon(xCoordinate);
return?xPos?==?-1?-1?:?(dbYCoordinate[xPos]?*?xCoordinate)?/?dbXCoordinate[xPos];
//?得到输入的?X?值位置,确定比率
private?int?getXPositon(double?xCoordinate)?{
for(int?i=0;?i?dbXCoordinate.length;?i++)?{
if(xCoordinate?=?dbXCoordinate[i])?{
return?i;
return?-1;
//?Variables?declaration?-?do?not?modify????
private?javax.swing.JButton?btnCalculateY;
private?javax.swing.JLabel?lblXCoordinate;
private?javax.swing.JLabel?lblYCoordinate;
private?javax.swing.JTextField?txtXCoordinate;
private?javax.swing.JTextField?txtYCoordinate;
//?End?of?variables?declaration????
①.、自己编写java程序,也就几十行代码,先访问数据库取数,再封装数据.
String DBDriver = SysConfig.getProperty("database.defaultProvider.driver");
String DBUser = SysConfig.getProperty("database.defaultProvider.username");
String DBPassword = SysConfig.getProperty("database.defaultProvider.password");
String DBUrl = SysConfig.getProperty("database.defaultProvider.serverURL");
//
Class.forName(DBDriver);
Properties myprop = System.getProperties();
myprop.setProperty("user",DBUser);
myprop.setProperty("password",DBPassword);
conn = DriverManager.getConnection(DBUrl,myprop);
..........
PreparedStatement pstmt = conn.prepareStatement(query);
ResultSet rs = pstmt.executeQuery();
.......
自由配置图表.操作java折线图代码,可以自由配置图表的各个属性,用来达到自己的要求和目的.Java是一门面向对象的编程语言,不仅吸收了C++语言的各种优点,还摒弃了C++里难以理解的多继承、指针等概念,所以呢Java语言具有功能强大和简单易用两个特征.
以上就是土嘎嘎小编为大家整理的java代码画折线图相关主题介绍,如果您觉得小编更新的文章只要能对粉丝们有用,就是我们最大的鼓励和动力,不要忘记讲本站分享给您身边的朋友哦！！