Question

在try {}中发生错误我只想让它工作。配有用于jfree和itext的jar。请帮忙:(

package com.pieChart.sample;


import java.awt.geom.Rectangle2D;
import java.io.FileOutputStream;

import org.jfree.chart.ChartFactory;
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.itextpdf.kernel.pdf.PdfWriter;
import com.itextpdf.layout.Document;
import com.orsonpdf.DefaultFontMapper;

public class PieChart {
    public static void main(String[] args) {
        writeChartToPDF(generateBarChart(), 500, 400, "C://barchart.pdf");
        writeChartToPDF(generatePieChart(), 500, 400, "C://piechart.pdf");
    }

    public static JFreeChart generatePieChart() {
        DefaultPieDataset dataSet = new DefaultPieDataset();
        dataSet.setValue("China", 19.64);
        dataSet.setValue("India", 17.3);
        dataSet.setValue("United States", 4.54);
        dataSet.setValue("Indonesia", 3.4);
        dataSet.setValue("Brazil", 2.83);
        dataSet.setValue("Pakistan", 2.48);
        dataSet.setValue("Bangladesh", 2.38);

        JFreeChart chart = ChartFactory.createPieChart(
                "World Population by countries", dataSet, true, true, false);

        return chart;
    }

    public static JFreeChart generateBarChart() {
        DefaultCategoryDataset dataSet = new DefaultCategoryDataset();
        dataSet.setValue(791, "Population", "1750 AD");
        dataSet.setValue(978, "Population", "1800 AD");
        dataSet.setValue(1262, "Population", "1850 AD");
        dataSet.setValue(1650, "Population", "1900 AD");
        dataSet.setValue(2519, "Population", "1950 AD");
        dataSet.setValue(6070, "Population", "2000 AD");

        JFreeChart chart = ChartFactory.createBarChart(
                "World Population growth", "Year", "Population in millions",
                dataSet, PlotOrientation.VERTICAL, false, true, false);

        return chart;
    }

    public static void writeChartToPDF(JFreeChart chart, int width, int height, String fileName) {
        PdfWriter writer = null;

        Document document = new Document(null);

        try {
            writer = PdfWriter.getInstance(document, new FileOutputStream(
                    fileName));
            document.open();
            PdfContentByte contentByte = writer.getDirectContent();
            PdfTemplate template = contentByte.createTemplate(width, height);
            Graphics2D graphics2d = template.createGraphics(width, height,
                    new DefaultFontMapper());
            Rectangle2D rectangle2d = new Rectangle2D.Double(0, 0, width,
                    height);

            chart.draw(graphics2d, rectangle2d);

            graphics2d.dispose();
            contentByte.addTemplate(template, 0, 0);

        } catch (Exception e) {
            e.printStackTrace();
        }
        document.close();
   }
}

Try {}的错误 1.PdfWriter 2.PdfContentByte 3.PdfTemplate 4.Graphics2D 5.Default字体映射器 6.Rectangle2D 所有这些错误都表示＆＃34;无法解决＆＃34;或＆＃34;无法解析为＃34;

类型

线程中的异常＆＃34; main＆＃34; java.lang.Error：未解决的编译问题： PdfWriter无法解析为某种类型文档无法解析为某种类型文档无法解析为某种类型 PdfWriter无法解析 FileOutputStream无法解析为某个类型 PdfContentByte无法解析为某种类型 PdfTemplate无法解析为某种类型 Graphics2D无法解析为某种类型 DefaultFontMapper无法解析为类型 Rectangle2D无法解析为某种类型 Rectangle2D无法解析为类型

饼图使用jFreechart并在iText中添加pdf图表

0 个答案: