Java tutorial
/* * Copyright 2009-2014 PrimeTek. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package org.primefaces.showcase.view.multimedia; import java.awt.Graphics2D; import java.awt.image.BufferedImage; import java.io.ByteArrayInputStream; import java.io.ByteArrayOutputStream; import java.io.File; import java.io.FileInputStream; import javax.annotation.PostConstruct; import javax.faces.bean.ManagedBean; import javax.imageio.ImageIO; import org.jfree.chart.ChartFactory; import org.jfree.chart.ChartUtilities; import org.jfree.chart.JFreeChart; import org.jfree.data.general.DefaultPieDataset; import org.jfree.data.general.PieDataset; import org.primefaces.model.DefaultStreamedContent; import org.primefaces.model.StreamedContent; @ManagedBean public class GraphicImageView { private StreamedContent graphicText; private StreamedContent chart; @PostConstruct public void init() { try { //Graphic Text BufferedImage bufferedImg = new BufferedImage(100, 25, BufferedImage.TYPE_INT_RGB); Graphics2D g2 = bufferedImg.createGraphics(); g2.drawString("This is a text", 0, 10); ByteArrayOutputStream os = new ByteArrayOutputStream(); ImageIO.write(bufferedImg, "png", os); graphicText = new DefaultStreamedContent(new ByteArrayInputStream(os.toByteArray()), "image/png"); //Chart JFreeChart jfreechart = ChartFactory.createPieChart("Cities", createDataset(), true, true, false); File chartFile = new File("dynamichart"); ChartUtilities.saveChartAsPNG(chartFile, jfreechart, 375, 300); chart = new DefaultStreamedContent(new FileInputStream(chartFile), "image/png"); } catch (Exception e) { e.printStackTrace(); } } public StreamedContent getGraphicText() { return graphicText; } public StreamedContent getChart() { return chart; } private PieDataset createDataset() { DefaultPieDataset dataset = new DefaultPieDataset(); dataset.setValue("New York", new Double(45.0)); dataset.setValue("London", new Double(15.0)); dataset.setValue("Paris", new Double(25.2)); dataset.setValue("Berlin", new Double(14.8)); return dataset; } }