JfreeChart相关开发:柱形图，饼图，折线图
来源：互联网 发布：vr软件看不了 编辑：程序博客网 时间：2024/05/16 07:51
最近做了一些关于图表方面的开发工作，现把这些开发过程记录一下，就算是留给自己看吧，估计百度也搜不到，我是用Swing开发的。哈哈，没有关系写着玩！上带码前，先看看我做的效果如何，截图如下：
以上是相同查询条件下，所展示的不同的图表，先看看不同的图表的相关属性设置吧！上代码，对了，还可以导出图片的！
/** * 折线图相关设置 * @param jFreeChart */ public static void lineChartConfig(JFreeChart jFreeChart){ CategoryPlot cp = jFreeChart.getCategoryPlot(); cp.setBackgroundPaint(ChartColor.WHITE); // 背景色设置 cp.setRangeGridlinePaint(ChartColor.GRAY); // 网格线色设置 cp.setDomainGridlinePaint(ChartColor.BLACK); cp.setDomainGridlinesVisible(true); //设置背景网格线是否可见 cp.setNoDataMessage("暂时没有此类数据"); cp.setBackgroundPaint(new Color(255, 255, 204)); // 数据轴属性部分 NumberAxis rangeAxis = (NumberAxis) cp.getRangeAxis(); rangeAxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits()); rangeAxis.setAutoRangeIncludesZero(true); // 自动生成 rangeAxis.setUpperMargin(0.20); rangeAxis.setLabelAngle(Math.PI / 2.0); rangeAxis.setAutoRange(false); // 获取图表区域对象 CategoryPlot plot = (CategoryPlot) jFreeChart.getPlot();// XYLineAndShapeRenderer xylinerenderer = (XYLineAndShapeRenderer)plot.getRenderer(); // xylinerenderer.setBaseShapesVisible(true); // 数据渲染部分 主要是对折线做操作 LineAndShapeRenderer renderer = (LineAndShapeRenderer) plot.getRenderer(); //设置曲线是否显示数据点 renderer.setBaseShapesVisible(true); renderer.setBaseItemLabelsVisible(true); renderer.setSeriesPaint(0, Color.red); // 设置折线的颜色 renderer.setBaseShapesFilled(true); renderer.setBaseItemLabelsVisible(true); renderer.setBasePositiveItemLabelPosition( new ItemLabelPosition(ItemLabelAnchor.OUTSIDE12, TextAnchor.BASELINE_LEFT)); renderer.setBaseItemLabelGenerator(new StandardCategoryItemLabelGenerator()); jFreeChart.getTitle().setFont(new Font("宋体", Font.BOLD, 15)); jFreeChart.getLegend().setItemFont(new Font("黑体", Font.BOLD, 15)); CategoryAxis domainAxis = plot.getDomainAxis(); /*------设置X轴坐标上的文字-----------*/ domainAxis.setTickLabelFont(new Font("黑体", Font.PLAIN, 14)); /*------设置X轴的标题文字------------*/ domainAxis.setLabelFont(new Font("宋体", Font.PLAIN, 14)); NumberAxis numberaxis = (NumberAxis) plot.getRangeAxis(); plot.getDomainAxis().setCategoryLabelPositions(CategoryLabelPositions.UP_45); /*------设置Y轴坐标上的文字-----------*/ numberaxis.setTickLabelFont(new Font("黑体", Font.PLAIN, 14)); /*------设置Y轴的标题文字------------*/ numberaxis.setLabelFont(new Font("黑体", Font.PLAIN, 14)); } /** * 饼图相关设置 * @param jFreeChart */ public static void barChartConfig(JFreeChart jFreeChart){ Plot plot = jFreeChart.getPlot(); plot.setBackgroundPaint(new Color(255, 255, 204)); plot.setNoDataMessage("暂时没有此类数据"); // 处理图形上的乱码 // 处理主标题的乱码 jFreeChart.getTitle().setFont(new Font("宋体", Font.BOLD, 18)); // 处理子标题乱码 // jFreeChart.getLegend().setItemFont(new Font("宋体", Font.BOLD, 15)); // 获取图表区域对象 CategoryPlot categoryPlot = (CategoryPlot) jFreeChart.getPlot(); // 获取X轴的对象 CategoryAxis3D categoryAxis3D = (CategoryAxis3D) categoryPlot.getDomainAxis(); // 获取Y轴的对象 NumberAxis3D numberAxis3D = (NumberAxis3D) categoryPlot.getRangeAxis(); // 处理X轴上的乱码 categoryAxis3D.setTickLabelFont(new Font("宋体", Font.BOLD, 15)); // 设置X轴标签倾斜45度显示 categoryAxis3D.setCategoryLabelPositions(CategoryLabelPositions.UP_45); // 处理X轴外的乱码 categoryAxis3D.setLabelFont(new Font("宋体", Font.BOLD, 15)); // 处理Y轴上的乱码 numberAxis3D.setTickLabelFont(new Font("宋体", Font.BOLD, 15)); // 处理Y轴外的乱码 numberAxis3D.setLabelFont(new Font("宋体", Font.BOLD, 15)); // 处理Y轴上显示的刻度，以10作为1格 numberAxis3D.setAutoTickUnitSelection(false); NumberTickUnit unit = new NumberTickUnit(2); numberAxis3D.setTickUnit(unit); // 获取绘图区域对象 CustomRenderer renderer = new CustomRenderer(); // 设置每个地区所包含的平行柱的之间距离 renderer.setItemMargin(0.5); // 在图形上显示数字 renderer.setBaseItemLabelGenerator(new StandardCategoryItemLabelGenerator()); renderer.setBaseItemLabelsVisible(true); renderer.setBaseItemLabelFont(new Font("宋体", Font.BOLD, 15)); renderer.setMaximumBarWidth(0.07); jFreeChart.getRenderingHints().put(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_OFF); // 显示每个柱的数值，并修改该数值的字体属性 renderer.setIncludeBaseInRange(true); categoryPlot.setRenderer(renderer); // 设置柱的透明度 categoryPlot.setForegroundAlpha(1.0f); // 背景色 透明度 categoryPlot.setBackgroundAlpha(0.5f); } /** * 饼图相关设置 * @param jFreeChart */ public static void pieChartConfig(JFreeChart jFreeChart){ // 处理主标题的乱码 jFreeChart.getTitle().setFont(new Font("宋体", Font.BOLD, 18)); // 处理子标题乱码 jFreeChart.getLegend().setItemFont(new Font("宋体", Font.BOLD, 15)); PiePlot plot = (PiePlot) jFreeChart.getPlot(); // 设置饼状图体里的的各个标签字体 plot.setLabelFont(new Font("宋体", Font.BOLD, 12)); plot.setNoDataMessage("暂时没有此类数据"); //设置百分比 plot.setLabelGenerator(new StandardPieSectionLabelGenerator( "{0} {2}", NumberFormat.getNumberInstance(), new DecimalFormat("0.00%"))); }柱形图，每个柱子的颜色是不同的，为了实现这效果，还是写了一段代码，有继承关系，如下：
public class CustomRenderer extends org.jfree.chart.renderer.category.BarRenderer { /** * */ private static final long serialVersionUID = 784630226449158436L; private Paint[] colors; //初始化柱子颜色 private String[] colorValues = { "#87CEFA", "#B0C4DE", "#8470FF", "#8B4513", "#FF00FF", "#FFF5EE" }; public CustomRenderer() { colors = new Paint[colorValues.length]; for (int i = 0; i < colorValues.length; i++) { colors[i] = Color.decode(colorValues[i]); } } //每根柱子以初始化的颜色不断轮循 public Paint getItemPaint(int i, int j) { return colors[j % colors.length]; } }这样就实现了每个柱子的颜色不同，我将柱子的颜色设置和图表属性的设置写在同一个类里了，下面再来看看后台所支持的数据 
当然了，数据表还有外键，现在就不多说了，结构已经给了，下面看看后台查询，上代码：
public Map<Object, Number> statMaterialChecks(int type, Equipment parent, Date from, Date to, String normalFlag, int codeType) { Map<Object, Number> map = new TreeMap<>(); String sql = null; if (type == 1) { Map ok = statMaterialChecks(11, parent, from, to, normalFlag, codeType); Map ng = statMaterialChecks(12, parent, from, to, normalFlag, codeType); ok.putAll(ng); return ok; } if (type == 2) { Map empty = statMaterialChecks(21, parent, from, to, normalFlag, codeType); Map notempty = statMaterialChecks(22, parent, from, to, normalFlag, codeType); empty.putAll(notempty); return empty; } switch (type) { case 1:// 按结果 sql = "SELECT COUNT(*),normalFlag FROM MaterialCheck WHERE (1=1)"; break; // case : // // sql = "SELECT COUNT(*),material.assignedCode FROM MaterialCheck WHERE // (1=1)"; // break; case 11: // sql = "SELECT COUNT(*),'OK' FROM MaterialCheck WHERE (1=1)"; break; case 12: // sql = "SELECT COUNT(*),'NG' FROM MaterialCheck WHERE (1=1)"; break; case 21: // sql = "SELECT COUNT(*),'无编码' FROM MaterialCheck WHERE (1=1)"; break; case 22: // sql = "SELECT COUNT(*),'有编码' FROM MaterialCheck WHERE (1=1)"; break; default:// 按天 sql = "SELECT COUNT(*),DATE(finishTime) FROM MaterialCheck WHERE (1=1)"; } List params = new ArrayList(); int i = 0; if (parent != null) { sql = sql + " AND equipment.id=?" + i; i++; params.add(parent.getId()); } Calendar c = Calendar.getInstance(); if (from != null) { c.setTime(from); c.set(Calendar.HOUR, 0); c.set(Calendar.MINUTE, 0); c.set(Calendar.SECOND, 0); c.set(Calendar.MILLISECOND, 0); sql = sql + " AND beginTime>=?" + i; i++; params.add(c.getTime()); } if (to != null) { c.setTime(to); c.set(Calendar.HOUR, 24); c.set(Calendar.MINUTE, 0); c.set(Calendar.SECOND, 0); c.set(Calendar.MILLISECOND, 0); sql = sql + " AND finishTime<=?" + i; i++; params.add(c.getTime()); } // 正常标志 if ("OK".equals(normalFlag)) { sql = sql + " AND normalFlag=true"; } else if ("NG".equals(normalFlag)) { sql = sql + " AND normalFlag=false"; } // 物料编码 if (codeType == 1) { sql = sql + " AND (material.assignedCode IS NULL OR material.assignedCode='')"; } else if (codeType == 2) { sql = sql + " AND (material.assignedCode IS NOT NULL AND material.assignedCode<>'')"; } switch (type) { case 1:// 按结果 sql = sql + " GROUP BY normalFlag"; break; // case 3: // // sql =sql+ " GROUP BY material.assignedCode"; // break; case 11: // sql = sql + " AND normalFlag=true GROUP BY 'OK'"; break; case 12: // sql = sql + " AND normalFlag=false GROUP BY 'NG'"; break; case 21: // sql = sql + " AND (material.assignedCode IS NULL OR material.assignedCode='') GROUP BY '无编码'"; break; case 22: // sql = sql + " AND (material.assignedCode IS NOT NULL AND material.assignedCode<>'') GROUP BY '有编码'"; break; default:// 按天 sql = sql + " GROUP BY DATE(finishTime)"; } List objects = getEntityDMO().getObjects(sql, params.toArray()); for (int j = 0; j < objects.size(); j++) { Object[] object = (Object[]) objects.get(j); map.put(object[1], (Number) object[0]); } return map; }前台调用如下：
/* * $Author$ * $Revision$ * $Date$ * 版权所有 * 北京XXX科技有限公司 * 中国 北京 */package com.ringchi.ria.app.frames;import java.awt.BorderLayout;import java.awt.Desktop;import java.awt.Font;import java.awt.GridLayout;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.awt.event.ItemEvent;import java.awt.event.ItemListener;import java.io.File;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException;import java.util.Date;import java.util.Map;import java.util.Map.Entry;import javax.swing.Box;import javax.swing.JButton;import javax.swing.JComboBox;import javax.swing.JComponent;import javax.swing.JInternalFrame;import javax.swing.JLabel;import javax.swing.JOptionPane;import javax.swing.JPanel;import javax.swing.SwingConstants;import javax.swing.filechooser.FileNameExtensionFilter;import org.apache.log4j.Logger;import org.jdesktop.fuse.InjectedResource;import org.jdesktop.fuse.ResourceInjector;import org.jdesktop.swingx.JXDatePicker;import org.jfree.chart.ChartFactory;import org.jfree.chart.ChartPanel;import org.jfree.chart.ChartUtilities;import org.jfree.chart.JFreeChart;import org.jfree.chart.plot.PlotOrientation;import org.jfree.data.category.DefaultCategoryDataset;import org.jfree.data.general.DefaultPieDataset;import com.ringchi.ria.app.IRiaConsts;import com.ringchi.ria.app.RiaApplication;import com.ringchi.ria.app.core.RiaModel;import com.ringchi.ria.app.ui.ChartsOverlay;import com.ringchi.ria.util.WidgetUtil;public class ChartsFrame extends JInternalFrame { private static Logger log = Logger.getLogger(ChartsFrame.class); @InjectedResource private Font hintFont; private JComponent topParent; private JXDatePicker beginDate, endDate; private JComboBox resultType, codeType; // 按OK，NG方式统计 private JComboBox chartType, statType;// 图表类型:柱状图，饼图，线图 private JPanel chartParentPanel; private JFreeChart chart; public ChartsFrame(JComponent topParent) { super("统计分析", true, true, true, false); ResourceInjector.get().inject(this); this.topParent = topParent; this.setFont(hintFont); this.setAutoscrolls(true); init(); } public void doDefaultCloseAction() { RiaApplication.getInstance().removeOverlay(ChartsOverlay.class); super.doDefaultCloseAction(); } private void init() { JPanel innerPanel = new JPanel(); this.add(innerPanel, BorderLayout.NORTH); innerPanel.setOpaque(false); innerPanel.setLayout(new GridLayout(2, 8)); this.add(innerPanel, BorderLayout.NORTH); // queryMethod = new JLabel("统计方式"); // queryMethod.setFont(hintFont); // innerPanel.add(queryMethod, new GridBagConstraints(0, 0, 1, 1, 0, 0, // GridBagConstraints.WEST, // GridBagConstraints.NONE, new Insets(0, 0, 0, 0), 0, 0)); JLabel infoLabel = new JLabel("开始日期"); infoLabel.setFont(hintFont); infoLabel.setHorizontalAlignment(SwingConstants.RIGHT); innerPanel.add(infoLabel);// , new GridBagConstraints(0, 1, 1, 1, 0, 0, // GridBagConstraints.WEST, // GridBagConstraints.NONE, new Insets(0, 0, 0, 0), 0, 0)); beginDate = new JXDatePicker(); beginDate.setFont(hintFont); beginDate.setDate(new Date()); innerPanel.add(beginDate);// , new GridBagConstraints(1, 1, 2, 1, 1.0, // 1.0, GridBagConstraints.EAST, // GridBagConstraints.HORIZONTAL, new Insets(0, 0, 0, 0), 0, 0)); infoLabel = new JLabel("截止日期"); infoLabel.setFont(hintFont); infoLabel.setHorizontalAlignment(SwingConstants.RIGHT); innerPanel.add(infoLabel);// , new GridBagConstraints(4, 1, 1, 1, 0, 0, // GridBagConstraints.WEST, // GridBagConstraints.NONE, new Insets(0, 0, 0, 0), 0, 0)); endDate = new JXDatePicker(); endDate.setFont(hintFont); endDate.setDate(new Date()); innerPanel.add(endDate);// , new GridBagConstraints(5, 1, 2, 1, 1.0, // 1.0, GridBagConstraints.EAST, // GridBagConstraints.HORIZONTAL, new Insets(0, 0, 0, 0), 0, 0)); infoLabel = new JLabel("检测结果"); infoLabel.setFont(hintFont); infoLabel.setHorizontalAlignment(SwingConstants.RIGHT); innerPanel.add(infoLabel);// , new GridBagConstraints(7, 1, 1, 1, 0, 0, // GridBagConstraints.WEST, // GridBagConstraints.NONE, new Insets(0, 0, 0, 0), 0, 0)); resultType = new JComboBox(new String[] { "全部", "OK", "NG" }); resultType.setFont(hintFont); innerPanel.add(resultType);// , new GridBagConstraints(8, 1, 1, 1, 0.0, // 0.0, GridBagConstraints.WEST, // GridBagConstraints.NONE, new Insets(0, 0, 0, 5), 0, 0)); infoLabel = new JLabel("编码类型"); infoLabel.setFont(hintFont); infoLabel.setHorizontalAlignment(SwingConstants.RIGHT); innerPanel.add(infoLabel);// , new GridBagConstraints(9, 1, 1, 1, 0, 0, // GridBagConstraints.WEST, // GridBagConstraints.NONE, new Insets(0, 5, 0, 0), 0, 0)); codeType = new JComboBox(new String[] { "全部", "编码为空", "编码不为空" }); codeType.setFont(hintFont); innerPanel.add(codeType);// new GridBagConstraints(10, 1, 1, 1, 0.0, // 0.0, GridBagConstraints.WEST, // GridBagConstraints.NONE, new Insets(0, 0, 0, 5), 0, 0)); infoLabel = new JLabel("统计类型"); infoLabel.setFont(hintFont); infoLabel.setHorizontalAlignment(SwingConstants.RIGHT); innerPanel.add(infoLabel);// , new GridBagConstraints(11, 1, 1, 1, 0, 0, // GridBagConstraints.WEST, // GridBagConstraints.NONE, new Insets(0, 5, 0, 0), 0, 0)); statType = new JComboBox(new String[] { "按天", "按检测结果", "按物料编码" }); statType.setFont(hintFont); innerPanel.add(statType);// , new GridBagConstraints(12, 1, 1, 1, 0.0, // 0.0, GridBagConstraints.WEST, // GridBagConstraints.NONE, new Insets(0, 0, 0, 5), 0, 0)); statType.addItemListener(new ItemListener() { @Override public void itemStateChanged(ItemEvent e) { if (e.getStateChange() == ItemEvent.SELECTED) {// 当用户的选择改变时，则在JLabel上会显示出Swing目前字形大小信息. changeChart(chartType.getSelectedIndex()); } } }); infoLabel = new JLabel("图表类型"); infoLabel.setFont(hintFont); infoLabel.setHorizontalAlignment(SwingConstants.RIGHT); innerPanel.add(infoLabel);// , new GridBagConstraints(13, 1, 1, 1, 0, 0, // GridBagConstraints.WEST, // GridBagConstraints.NONE, new Insets(0, 5, 0, 0), 0, 0)); chartType = new JComboBox(new String[] { "柱状图", "饼图", "折线图" }); chartType.setFont(hintFont); innerPanel.add(chartType);// , new GridBagConstraints(14, 1, 1, 1, 0.0, // 0.0, GridBagConstraints.WEST, // GridBagConstraints.NONE, new Insets(0, 0, 0, 5), 0, 0)); chartType.addItemListener(new ItemListener() { @Override public void itemStateChanged(ItemEvent e) { if (e.getStateChange() == ItemEvent.SELECTED) {// 当用户的选择改变时，则在JLabel上会显示出Swing目前字形大小信息. changeChart(chartType.getSelectedIndex()); } } }); JButton query = new JButton("查 询"); query.setFont(hintFont); query.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent event) { changeChart(chartType.getSelectedIndex()); // add(chartPanel, BorderLayout.CENTER); } }); innerPanel.add(query);// , new GridBagConstraints(15, 1, 1, 1, 0, 0, // GridBagConstraints.WEST, // GridBagConstraints.NONE, new Insets(0, 0, 0, 0), 0, 0)); JButton exportBtn = new JButton("导出图片"); exportBtn.setFont(hintFont); exportBtn.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent event) { // 导出图表 if (chart != null) { doExport(chart); } else { JOptionPane.showMessageDialog(getParent(), "发生错误，请先生成图表！" + "", "数据导出", JOptionPane.ERROR_MESSAGE); return; } } }); innerPanel.add(exportBtn); innerPanel.add(Box.createHorizontalGlue()); innerPanel.add(Box.createHorizontalGlue()); // , new GridBagConstraints(16, 1, 1, 1, 0, 0, GridBagConstraints.WEST, // GridBagConstraints.NONE, new Insets(0, 0, 0, 0), 0, 0)); chartParentPanel = new JPanel(); chartParentPanel.setLayout(new BorderLayout()); add(chartParentPanel, BorderLayout.CENTER); } /** * 创建折线图 * * @param type * @return */ private ChartPanel createLineChart(int type) { Date from = beginDate.getDate(); Date to = endDate.getDate(); DefaultCategoryDataset dataset = new DefaultCategoryDataset(); chart = ChartFactory.createLineChart("结果统计图", "统计个数", "时间", dataset, PlotOrientation.VERTICAL, true, true, true); // if (type==0) { Map<Object, Number> map = RiaModel.getInstance().statMaterialChecks(type, null, from, to, (String) resultType.getSelectedItem(), codeType.getSelectedIndex()); for (Entry<Object, Number> entry : map.entrySet()) { dataset.addValue(entry.getValue(), "数量", entry.getKey().toString()); } // } CustomRenderer.lineChartConfig(chart); // 折线图相关设置 ChartPanel chartPanel = new ChartPanel(chart, true); return chartPanel; } private ChartPanel createBarChart(int type) { Date from = beginDate.getDate(); Date to = endDate.getDate(); // 添加数据 DefaultCategoryDataset dataset = new DefaultCategoryDataset(); // if (type==0) { Map<Object, Number> map = RiaModel.getInstance().statMaterialChecks(type, null, from, to, (String) resultType.getSelectedItem(), codeType.getSelectedIndex()); for (Entry<Object, Number> entry : map.entrySet()) { // dataset.addValue(entry.getValue(), entry.getKey(), // entry.getKey()); dataset.addValue(entry.getValue(), "数量", entry.getKey().toString()); } chart = ChartFactory.createBarChart3D("结果统计图", "统计结果", // X轴的标签 "数量", // Y轴的标签 dataset, // 图标显示的数据集合 PlotOrientation.VERTICAL, // 图像的显示形式（水平或者垂直） false, // 是否显示图例 true, // 是否生成提示的标签 false); // 是否生成URL链接 CustomRenderer.barChartConfig(chart);// 饼图相关设置 ChartPanel chartPanel = new ChartPanel(chart, true); return chartPanel; } private ChartPanel createPieChart(int type) { Date from = beginDate.getDate(); Date to = endDate.getDate(); // 添加数据 DefaultPieDataset dataset = new DefaultPieDataset(); // if (type==0) { Map<Object, Number> map = RiaModel.getInstance().statMaterialChecks(type, null, from, to, (String) resultType.getSelectedItem(), codeType.getSelectedIndex()); for (Entry<Object, Number> entry : map.entrySet()) { dataset.setValue(entry.getKey().toString(), entry.getValue()); // dataset.setValue(entry.getValue().toString(),entry.getKey().getDay()); } chart = ChartFactory.createPieChart("结果统计图", dataset, true, true, false); CustomRenderer.pieChartConfig(chart); ChartPanel chartPanel = new ChartPanel(chart, true); return chartPanel; } /** * 图表变更 */ public void changeChart(int type) { chartParentPanel.removeAll(); ChartPanel chartPanel = null; switch (type) { case 0: // bar chartPanel = createBarChart(statType.getSelectedIndex()); break; case 1:// pie chartPanel = createPieChart(statType.getSelectedIndex()); break; case 2:// line chartPanel = createLineChart(statType.getSelectedIndex()); break; } if (chartPanel != null) chartParentPanel.add(chartPanel); } public void dispose() { } /** * 回调 * * @param chartPanel */ private void doExport(JFreeChart chart) { ExportReportDialog dialog = new ExportReportDialog(new ExportReportDialog.ExportAction() { @Override public void doExport(String path) { try { saveAsFile(chart, path, chartParentPanel.getWidth(), chartParentPanel.getHeight()); } catch (Exception e) { log.error(e); JOptionPane.showMessageDialog(getParent(), "发生错误，请确保文件可写！" + e.getMessage(), "数据导出", JOptionPane.ERROR_MESSAGE); } } @Override public String getDefaultName() { return "统计图-" + IRiaConsts.nameFormatter.format(new Date()) + ".PNG"; } @Override public FileNameExtensionFilter getFilter() { return new FileNameExtensionFilter("PNG文件", new String[] { "png" }); } }); dialog.setSize(400, 200); int screenWidth = WidgetUtil.getScreenWidth() / 2; // 获取屏幕的宽 int screenHeight = WidgetUtil.getScreenHeight() / 2; // 获取屏幕的高 int height = dialog.getSize().height; int width = dialog.getSize().width; dialog.setLocation(screenWidth - width / 2, screenHeight - height / 2); dialog.setVisible(true); } /** * 保存图片 * * @param chartPanel * @param outputPath * @param weight * @param height */ public static void saveAsFile(JFreeChart chart, String outputPath, int weight, int height) { FileOutputStream out = null; try { File outFile = new File(outputPath); if (!outFile.getParentFile().exists()) { outFile.getParentFile().mkdirs(); } out = new FileOutputStream(outputPath); // 保存为PNG ChartUtilities.writeChartAsPNG(out, chart, weight, height); Desktop.getDesktop().open(outFile); //打开图片 // 保存为JPEG // ChartUtilities.writeChartAsJPEG(out, chartPanel, weight, height); out.flush(); } catch (FileNotFoundException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } finally { if (out != null) { try { out.close(); } catch (IOException e) { // do nothing } } } }}以下是导出图片所用的对话框，代码如下：
package com.ringchi.ria.app.frames;import java.awt.Container;import java.awt.Dimension;import java.awt.Font;import java.awt.GridBagConstraints;import java.awt.GridBagLayout;import java.awt.Insets;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.beans.PropertyChangeEvent;import java.beans.PropertyChangeListener;import java.io.File;import javax.swing.Box;import javax.swing.JButton;import javax.swing.JDialog;import javax.swing.JFileChooser;import javax.swing.JLabel;import javax.swing.JOptionPane;import javax.swing.JTextField;import javax.swing.SwingConstants;import javax.swing.SwingUtilities;import javax.swing.filechooser.FileNameExtensionFilter;import org.apache.log4j.Logger;import org.jdesktop.fuse.InjectedResource;import org.jdesktop.fuse.ResourceInjector;import com.ringchi.ria.app.IRiaConsts;import com.ringchi.ria.app.core.RiaModel;public class ExportReportDialog extends JDialog implements ActionListener { private static Logger log = Logger.getLogger(ExportReportDialog.class); @InjectedResource private Font hintFont; private JTextField path; private JButton ok; private JButton cancel; private ExportAction action; // private List<MaterialCheck> checks; public static interface ExportAction { public String getDefaultName(); public void doExport(String filename); public FileNameExtensionFilter getFilter(); }; public ExportReportDialog(ExportAction action) { super(); this.action = action; ResourceInjector.get().inject(this); this.setModal(true); this.setTitle("数据导出"); SwingUtilities.invokeLater(new Runnable() { public void run() { init(); } }); } private void init() { Container parent = getContentPane(); parent.setLayout(new GridBagLayout()); parent.add(Box.createRigidArea(new Dimension(10, 10)), new GridBagConstraints(0, 0, 1, 1, 0, 1, GridBagConstraints.CENTER, GridBagConstraints.HORIZONTAL, new Insets(0, 0, 0, 0), 0, 0)); JLabel info = new JLabel("存放目录 "); info.setHorizontalAlignment(SwingConstants.RIGHT); info.setFont(hintFont); path = new JTextField(); path.setFont(hintFont); // path.setText(RiaModel.getInstance().getCache("export.path")); JButton select = new JButton("选择"); select.setFont(hintFont); select.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { final JFileChooser dialog = new JFileChooser() { public void approveSelection() { File file = this.getSelectedFile(); if (file.isFile() && file.exists()) { int copy = JOptionPane.showConfirmDialog(null, "文件已存在，确定要覆盖吗？", "保存", JOptionPane.YES_NO_OPTION, JOptionPane.QUESTION_MESSAGE); if (copy == JOptionPane.YES_OPTION) super.approveSelection(); } else super.approveSelection(); } }; // dialog.setFileFilter(action.getFilter()); dialog.setDialogTitle("保存文件"); File last = new File(RiaModel.getInstance().getConfigValue(IRiaConsts.SAVE_DIR)); if (last.isFile()) last = last.getParentFile(); if (last.exists()) dialog.setCurrentDirectory(last); dialog.setFileSelectionMode(JFileChooser.FILES_AND_DIRECTORIES); last = dialog.getCurrentDirectory();// final String theLast = "检测结果-" + IRiaConsts.nameFormatter.format(new Date()) + ".xlsx"; last = new File(last, action.getDefaultName()); dialog.setSelectedFile(last); dialog.addPropertyChangeListener(new PropertyChangeListener() { @Override public void propertyChange(PropertyChangeEvent e) { if (JFileChooser.DIRECTORY_CHANGED_PROPERTY.equals(e.getPropertyName())) { dialog.setSelectedFile(new File(dialog.getSelectedFile(), action.getDefaultName())); } } }); int result = dialog.showSaveDialog(getParent()); if (result == JFileChooser.APPROVE_OPTION) { path.setText(dialog.getSelectedFile().getAbsolutePath()); } } }); parent.add(info, new GridBagConstraints(1, 1, 1, 1, 0, 0, GridBagConstraints.WEST, GridBagConstraints.NONE, new Insets(0, 0, 0, 0), 0, 0)); parent.add(path, new GridBagConstraints(2, 1, 2, 1, 1, 1, GridBagConstraints.EAST, GridBagConstraints.HORIZONTAL, new Insets(0, 0, 0, 0), 0, 0)); parent.add(select, new GridBagConstraints(4, 1, 1, 1, 0, 0, GridBagConstraints.CENTER, GridBagConstraints.NONE, new Insets(0, 0, 0, 0), 0, 0)); ok = new JButton("导出"); ok.addActionListener(this); ok.setFont(hintFont); cancel = new JButton("取消"); cancel.addActionListener(this); cancel.setFont(hintFont); parent.add(cancel, new GridBagConstraints(2, 2, 1, 1, 1, 0, GridBagConstraints.EAST, GridBagConstraints.HORIZONTAL, new Insets(0, 0, 0, 10), 0, 0)); parent.add(ok, new GridBagConstraints(3, 2, 1, 1, 1, 0, GridBagConstraints.WEST, GridBagConstraints.HORIZONTAL, new Insets(0, 10, 0, 0), 0, 0)); parent.add(Box.createRigidArea(new Dimension(10, 10)), new GridBagConstraints(5, 3, 1, 1, 0, 1, GridBagConstraints.CENTER, GridBagConstraints.HORIZONTAL, new Insets(0, 0, 0, 0), 0, 0)); } public void actionPerformed(final ActionEvent e) { SwingUtilities.invokeLater(new Runnable() { public void run() { if (e.getSource() == ok) { doExport(); return; } if (e.getSource() == cancel) { cancel(); } } }); } public void doExport() { String rpath = path.getText(); File test = new File(rpath); if (test.isDirectory()) { JOptionPane.showMessageDialog(this.getParent(), "请选择文件！", "数据导出", JOptionPane.ERROR_MESSAGE); return; } try { RiaModel.getInstance().setConfigValue(IRiaConsts.SAVE_DIR, rpath); RiaModel.getInstance().getStore().save(); } catch (Exception e) { } action.doExport(rpath); cancel(); } public void cancel() { this.setVisible(false); this.dispose(); }}阅读全文
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