highcharts的导出功能
package cn.com.songjy.servlet;import java.io.IOException;import java.io.StringReader;import javax.servlet.ServletException;import javax.servlet.ServletOutputStream;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import org.apache.batik.transcoder.Transcoder;import org.apache.batik.transcoder.TranscoderException;import org.apache.batik.transcoder.TranscoderInput;import org.apache.batik.transcoder.TranscoderOutput;import org.apache.batik.transcoder.image.JPEGTranscoder;import org.apache.batik.transcoder.image.PNGTranscoder;import org.apache.fop.svg.PDFTranscoder;/** * Servlet implementation class ExportServlet */public class ExportServlet extends HttpServlet {private static final long serialVersionUID = 1L;/** * Default constructor. */public ExportServlet() {// TODO Auto-generated constructor stub}/** * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse * response) */protected void doGet(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException {doPost(request, response);}/** * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse * response) */protected void doPost(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException {request.setCharacterEncoding("utf-8");String type = request.getParameter("type");String svg = request.getParameter("svg");ServletOutputStream out = response.getOutputStream();if (null != type && null != svg) {// This line is necessary due to a bug in the highcharts SVG// generator for IE// I'm guessing it wont be needed later.svg = svg.replaceAll(":rect", "rect");String ext = "";Transcoder t = null;if (type.equals("image/png")) {ext = "png";t = new PNGTranscoder();} else if (type.equals("image/jpeg")) {ext = "jpg";t = new JPEGTranscoder();} else if (type.equals("application/pdf")) {ext = "pdf";t = new PDFTranscoder();} else if (type.equals("image/svg+xml")) {ext = "svg";}response.addHeader("Content-Disposition","attachment; filename=chart." + ext);response.addHeader("Content-Type", type);if (null != t) {TranscoderInput input = new TranscoderInput(new StringReader(svg));TranscoderOutput output = new TranscoderOutput(out);try {t.transcode(input, output);} catch (TranscoderException e) {out.print("Problem transcoding stream. See the web logs for more details.");e.printStackTrace();}} else if (ext == "svg") {out.print(svg);} else {out.print("Invalid type: " + type);}} else {response.addHeader("Content-Type", "text/html");out.println("Usage:\n\tParameter [svg]: The DOM Element to be converted.\n\tParameter [type]: The destination MIME type for the elment to be transcoded.");}out.flush();out.close();}}