Android拍照上传程序的Servlet程序样例

UploadFileServlet.java

 

package com.hemi.rhet.servlet;import java.io.*;import java.net.InetAddress;import java.net.UnknownHostException;import java.sql.SQLException;import java.text.SimpleDateFormat;import java.util.*;import javax.servlet.*;import javax.servlet.http.*;//import org.apache.commons.fileupload.*;//import org.apache.commons.fileupload.disk.DiskFileItemFactory;//import org.apache.commons.fileupload.servlet.ServletFileUpload;//import org.apache.commons.lang.time.DateUtils;import org.apache.log4j.Logger;//import org.apache.struts2.ServletActionContext;public class UploadFileServlet extends HttpServlet{ private static Logger log = Logger.getLogger(UploadFileServlet.class); private static final String OBLIQUE_LINE = "/"; private static final String OPPOSITE_OBLIQUE_LINE = "////"; private static final String WEBPOSITION = "webapps"; private static final String SBPATH = "UploadedFiles/"; File outdir = null; File outfile = null; FileOutputStream fos = null; BufferedInputStream bis = null; byte[] bs = new byte[1024]; String uploadFName = null; String orderNo = null; String userId = null; String attachType = "2"; public void init() throws ServletException {// if (log.isDebugEnabled())// {// log.debug("进入init()方法！！");// } } public void doGet(HttpServletRequest request , HttpServletResponse response) throws IOException, ServletException { doPost(request, response); } public void doPost(HttpServletRequest request , HttpServletResponse response) throws IOException, ServletException { String root = this.getServletContext().getRealPath("/"); root = root.replaceAll("////", "/"); try { StringBuffer destFName = new StringBuffer(); destFName.append(getRealDir(root)).append(SBPATH); outdir = new File(destFName.toString()); request.setCharacterEncoding("UTF-8"); uploadFName = request.getParameter("filename"); //name of uploaded file uploadFName = request.getHeader("filename"); if (isEmpty(uploadFName)) uploadFName = "filename.jpg"; //orderNo = request.getParameter("orderno"); //id of the order or work sheet //userId = request.getParameter("userid"); //id of the user who upload the file //attachType = request.getParameter("attach_type"); //type of attachment, refer to file.FileBean's definition String desc = request.getParameter("desc"); //description of uploaded file if (desc==null) desc = ""; if (true) { destFName.append(getDatedFName(uploadFName)); outfile = new File(destFName.toString()); bis = new BufferedInputStream(request.getInputStream()); uploadFile(); //response.getWriter().write("0"); //success response.setHeader("resultcode", "0"); } else if (desc.length() > 400/2) { //response.getWriter().write("3"); //illegal description response.setHeader("resultcode", "3"); } else { if (log.isDebugEnabled()) { log.debug("调用格式错误!"); } response.sendError(100, "参数错误!"); //response.getWriter().write("1"); response.setHeader("resultcode", "1"); //parameter error //return; } } catch (SQLException e) { if (log.isDebugEnabled()) { log.debug(e); } //response.getWriter().write("6"); //failure of insert to database response.setHeader("resultcode", "6"); } catch (Exception e) { if (log.isDebugEnabled()) { log.debug(e); } //response.getWriter().write("7"); //failure response.setHeader("resultcode", "7"); } finally { if (null != bis) bis.close(); if (null != fos) fos.close(); } } private void uploadFile() throws IOException { if (log.isDebugEnabled()) { log.debug("outdir:" + outdir.getPath()); log.debug("outfile:" + outfile.getPath()); } if (!outdir.exists()) outdir.mkdir(); if (!outfile.exists()) outfile.createNewFile(); fos = new FileOutputStream(outfile); int i; while ((i = bis.read(bs)) != -1) { fos.write(bs, 0, i); } } public static String getDatedFName(String fname) {StringBuffer result = new StringBuffer();SimpleDateFormat df = new SimpleDateFormat("yyMMddHHmmss");String dateSfx = "_" + df.format(new Date());int idx = fname.lastIndexOf('.');if (idx != -1) {result.append(fname.substring(0, idx));result.append(dateSfx);result.append(fname.substring(idx));} else {result.append(fname);result.append(dateSfx);}return result.toString();} public static String getUrlFName(String fname, HttpServletRequest request) {String result = ""; if (isEmpty(fname)) return result;try {if (fname.startsWith("http://")) {result = fname;} else {//HttpServletRequest request = ServletActionContext.getServletContext().getRgetRequest();//UserAndOrganAndRole user = (UserAndOrganAndRole)request.getSession().getAttribute("user");String ip = request.getServerName();int port = request.getServerPort();result = fname.substring(fname.indexOf(UploadFileServlet.SBPATH));StringBuffer tmpBuff = new StringBuffer();tmpBuff.append("http://").append(ip).append(":").append(port).append(OBLIQUE_LINE).append(result);//Sample: http://localhost:8083/UploadedFiles/IMAGE_067_100222102521.jpgresult = tmpBuff.toString();}} catch (Exception ex) {ex.printStackTrace();}System.out.println("result is: "+result);return result;}public static boolean isEmpty(String str) {return ((str == null) || (str.length() == 0));} /** * Method getRealDir search webapps position * * @param despath * * @return * */ private String getRealDir(String newFileNameRoot) throws Exception { if (newFileNameRoot == null) throw new Exception("get real dir failed !"); int dp = newFileNameRoot .lastIndexOf(OBLIQUE_LINE); if (dp == -1) throw new Exception("invalid path !"); int dpbefore = newFileNameRoot.lastIndexOf( OBLIQUE_LINE, dp - 1); if (dpbefore == -1) throw new Exception("invalid path !"); String needSubStr = newFileNameRoot.substring(dpbefore + 1, dp); String nextStr = newFileNameRoot.substring(0, dpbefore + 1); if (!needSubStr.trim().equals(WEBPOSITION)) { return getRealDir(nextStr); } else return newFileNameRoot; } public static void main(String[] args) { }}

 

web.xml

<?xml version="1.0" encoding="UTF-8"?><web-app version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"> <welcome-file-list> <welcome-file>index.jsp</welcome-file> </welcome-file-list> <servlet> <servlet-name>Upload</servlet-name> <servlet-class>com.hemi.rhet.servlet.UploadFileServlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>Upload</servlet-name> <url-pattern>/system/fileUpload</url-pattern> </servlet-mapping></web-app>