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();
}
}
备注：所需jar包见附件，也可至官网http://xmlgraphics.apache.org/batik/下载
引自：http://wenku.baidu.com/view/f39593c76137ee06eff9189e.html
参考资料：
http://wenku.baidu.com/view/adfc303d376baf1ffc4fad33.html
http://wenku.baidu.com/view/6b392bc36137ee06eff9183e.html