Android拍照上傳程序的Servlet程序樣例

相關閱讀：Android拍照上傳代碼樣例 http://www.linuxidc.com/Linux/2011-11/47617.htm

UploadFileServlet.java

1. package com.hemi.rhet.servlet;  
2.   
3. import java.io.*;  
4. import java.net.InetAddress;  
5. import java.net.UnknownHostException;  
6. import java.sql.SQLException;  
7. import java.text.SimpleDateFormat;  
8. import java.util.*;  
9.   
10. import javax.servlet.*;  
11. import javax.servlet.http.*;  
12.   
13. //import org.apache.commons.fileupload.*;   
14. //import org.apache.commons.fileupload.disk.DiskFileItemFactory;   
15. //import org.apache.commons.fileupload.servlet.ServletFileUpload;   
16. //import org.apache.commons.lang.time.DateUtils;   
17. import org.apache.log4j.Logger;  
18. //import org.apache.struts2.ServletActionContext;   
19.   
20.   
21. public class UploadFileServlet extends HttpServlet  
22. {  
23.   
24.     private static Logger log = Logger.getLogger(UploadFileServlet.class);  
25.   
26.     private static final String OBLIQUE_LINE = "/";  
27.   
28.     private static final String OPPOSITE_OBLIQUE_LINE = "////";  
29.   
30.     private static final String WEBPOSITION = "webapps";  
31.       
32.     private static final String SBPATH = "UploadedFiles/";  
33.   
34.     File outdir = null;  
35.   
36.     File outfile = null;  
37.   
38.     FileOutputStream fos = null;  
39.   
40.     BufferedInputStream bis = null;  
41.   
42.     byte[] bs = new byte[1024];  
43.   
44.     String uploadFName = null;  
45.     String orderNo = null;  
46.     String userId = null;  
47.     String attachType = "2";  
48.   
49.     public void init() throws ServletException  
50.     {  
51. //        if (log.isDebugEnabled())   
52. //        {   
53. //            log.debug("進入init()方法！！");   
54. //        }   
55.     }  
56.   
57.     public void doGet(HttpServletRequest request , HttpServletResponse response) throws IOException, ServletException  
58.     {  
59.         doPost(request, response);  
60.     }  
61.   
62.     public void doPost(HttpServletRequest request , HttpServletResponse response) throws IOException, ServletException  
63.     {  
64.         String root = this.getServletContext().getRealPath("/");   
65.         root = root.replaceAll("////", "/");  
66.           
67.         try  
68.         {  
69.             StringBuffer destFName = new StringBuffer();  
70.             destFName.append(getRealDir(root)).append(SBPATH);  
71.             outdir = new File(destFName.toString());  
72.               
73.             request.setCharacterEncoding("UTF-8");  
74.               
75.             uploadFName = request.getParameter("filename");  //name of uploaded file   
76.             uploadFName = request.getHeader("filename");  
77.             if (isEmpty(uploadFName)) uploadFName = "filename.jpg";  
78.             //orderNo = request.getParameter("orderno");       //id of the order or work sheet    
79.             //userId  = request.getParameter("userid");        //id of the user who upload the file   
80.             //attachType = request.getParameter("attach_type"); //type of attachment, refer to file.FileBean's definition    
81.               
82.             String desc = request.getParameter("desc");      //description of uploaded file   
83.             if (desc==null) desc = "";  
84.               
85.             if (true)  
86.             {  
87.                 destFName.append(getDatedFName(uploadFName));  
88.                 outfile = new File(destFName.toString());  
89.                   
90.                 bis = new BufferedInputStream(request.getInputStream());  
91.                 uploadFile();   
92.                   
93.                 //response.getWriter().write("0");  //success   
94.                 response.setHeader("resultcode", "0");  
95.   
96.             }  
97.             else if (desc.length() > 400/2) {  
98.                 //response.getWriter().write("3");  //illegal description   
99.                 response.setHeader("resultcode", "3");  
100.             }  
101.             else  
102.             {  
103.                 if (log.isDebugEnabled())  
104.                 {  
105.                     log.debug("調用格式錯誤!");  
106.                 }  
107.                 response.sendError(100, "參數錯誤!");  
108.                 //response.getWriter().write("1");   
109.                 response.setHeader("resultcode", "1");  //parameter error   
110.                   
111.                 //return;   
112.             }  
113.         } catch (SQLException e) {  
114.             if (log.isDebugEnabled()) {  
115.                 log.debug(e);  
116.             }  
117.               
118.             //response.getWriter().write("6");  //failure of insert to database    
119.             response.setHeader("resultcode", "6");  
120.   
121.         } catch (Exception e) {  
122.             if (log.isDebugEnabled()) {  
123.                 log.debug(e);  
124.             }  
125.             //response.getWriter().write("7");  //failure   
126.             response.setHeader("resultcode", "7");  
127.               
128.         } finally {  
129.             if (null != bis)  
130.                 bis.close();  
131.             if (null != fos)  
132.                 fos.close();  
133.         }  
134.     }  
135.   
136.     private void uploadFile() throws IOException  
137.     {  
138.         if (log.isDebugEnabled())  
139.         {  
140.             log.debug("outdir:" + outdir.getPath());  
141.             log.debug("outfile:" + outfile.getPath());  
142.         }  
143.         if (!outdir.exists())  
144.             outdir.mkdir();  
145.         if (!outfile.exists())  
146.             outfile.createNewFile();  
147.   
148.         fos = new FileOutputStream(outfile);  
149.         int i;  
150.         while ((i = bis.read(bs)) != -1)  
151.         {  
152.             fos.write(bs, 0, i);  
153.         }  
154.     }  
155.       
156.     public static String getDatedFName(String fname) {  
157.         StringBuffer result = new StringBuffer();  
158.   
159.         SimpleDateFormat df = new SimpleDateFormat("yyMMddHHmmss");  
160.         String dateSfx = "_" + df.format(new Date());  
161.   
162.         int idx = fname.lastIndexOf('.');  
163.         if (idx != -1) {  
164.             result.append(fname.substring(0, idx));  
165.             result.append(dateSfx);  
166.             result.append(fname.substring(idx));  
167.         } else {  
168.             result.append(fname);  
169.             result.append(dateSfx);  
170.         }  
171.   
172.         return result.toString();  
173.     }  
174.       
175.     public static String getUrlFName(String fname, HttpServletRequest request) {  
176.         String result = "";   
177.         if (isEmpty(fname)) return result;  
178.           
179.         try {  
180.             if (fname.startsWith("http://")) {  
181.                 result = fname;  
182.             } else {  
183.                 //HttpServletRequest request = ServletActionContext.getServletContext().getRgetRequest();   
184.                 //UserAndOrganAndRole user = (UserAndOrganAndRole)request.getSession().getAttribute("user");   
185.                   
186.                 String ip = request.getServerName();  
187.                 int port = request.getServerPort();  
188.                   
189.                 result = fname.substring(fname.indexOf(UploadFileServlet.SBPATH));  
190.                 StringBuffer tmpBuff = new StringBuffer();  
191.                 tmpBuff.append("http://").append(ip).append(":").append(port).append(OBLIQUE_LINE).append(result);  
192.                 //Sample: http://localhost:8083/UploadedFiles/IMAGE_067_100222102521.jpg   
193.   
194.                 result = tmpBuff.toString();  
195.   
196.             }  
197.         } catch (Exception ex) {  
198.             ex.printStackTrace();  
199.         }  
200.           
201.         System.out.println("result is: "+result);  
202.         return result;    
203.     }  
204.       
205.     public static boolean isEmpty(String str) {  
206.         return ((str == null) || (str.length() == 0));  
207.     }  
208.   
209.     /** 
210.      * Method getRealDir search webapps position 
211.      *  
212.      * @param despath 
213.      *  
214.      * @return 
215.      *  
216.      */  
217.     private String getRealDir(String newFileNameRoot) throws Exception {  
218.         if (newFileNameRoot == null)  
219.             throw new Exception("get real dir failed !");  
220.         int dp = newFileNameRoot  
221.                 .lastIndexOf(OBLIQUE_LINE);  
222.         if (dp == -1)  
223.             throw new Exception("invalid path !");  
224.         int dpbefore = newFileNameRoot.lastIndexOf(  
225.                 OBLIQUE_LINE, dp - 1);  
226.         if (dpbefore == -1)  
227.             throw new Exception("invalid path !");  
228.         String needSubStr = newFileNameRoot.substring(dpbefore + 1, dp);  
229.         String nextStr = newFileNameRoot.substring(0, dpbefore + 1);  
230.         if (!needSubStr.trim().equals(WEBPOSITION)) {  
231.             return getRealDir(nextStr);  
232.   
233.         } else  
234.             return newFileNameRoot;  
235.     }  
236.       
237.     public static void main(String[] args)  
238.     {  
239.   
240.     }  
241. }  

web.xml

1. <?xml version="1.0" encoding="UTF-8"?>  
2. <web-app version="2.4"   
3.     xmlns="http://java.sun.com/xml/ns/j2ee"   
4.     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"   
5.     xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee   
6.     http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">  
7.   <welcome-file-list>  
8.     <welcome-file>index.jsp</welcome-file>  
9.   </welcome-file-list>  
10.     
11.   <servlet>      
12.         <servlet-name>Upload</servlet-name>      
13.         <servlet-class>com.hemi.rhet.servlet.UploadFileServlet</servlet-class>      
14.     </servlet>         
15.     <servlet-mapping>      
16.         <servlet-name>Upload</servlet-name>      
17.         <url-pattern>/system/fileUpload</url-pattern>      
18.     </servlet-mapping>  
19. </web-app>