H5实现web调用摄像头在线照相

package com.bg.camera.servlet; import java.io.BufferedOutputStream; import java.io.File; import java.io.FileOutputStream; import java.io.IOException; import java.io.OutputStream; import java.io.PrintWriter; import java.util.Date; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import com.alibaba.fastjson.JSON; import sun.misc.BASE64Decoder; /** * Servlet implementation class UploadPhotoServlet */ public class UploadPhotoServlet extends HttpServlet { private static final long serialVersionUID = 1L; /** * Default constructor. */ public UploadPhotoServlet() { // TODO Auto-generated constructor stub } /** * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response) */ protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub doPost(request,response); response.getWriter().append("Served at: ").append(request.getContextPath()); } /** * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response) */ protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { String photoData = request.getParameter("photo"); byte[] bytes=new BASE64Decoder().decodeBuffer(photoData); String realPath=request.getSession().getServletContext().getRealPath("/"); File file=new File(realPath,"upload/"+new Date().getTime()+".png"); if(!file.exists()){ file.createNewFile(); } OutputStream os = null; try{ os = new BufferedOutputStream(new FileOutputStream(file)); os.write(bytes); }catch(IOException e){ e.printStackTrace(); PrintWriter writer=response.getWriter(); writer.println("error happened:"); writer.println(e.toString()); }finally{ if(os != null){ os.close(); } } response.getWriter().println("upload sucess"); } }